Portable multi-output adjustable power supply

Abstract

The utility model provides a portable multi-output adjustable power supply, which relates to the technical field of power supplies and comprises a power supply module, a battery protection circuit, a charging part circuit and a voltage conversion part circuit. The first output module comprises a main loop and a circuit of a feedback and control part; the second output module comprises a main loop, a circuit of a current sampling part and a control circuit of a CC part and a CV part; the third output module comprises a first output circuit and a second output circuit which have the same structure; wherein the first output circuit and the second output circuit comprise a main loop, a sampling part of the output circuit and a feedback and control circuit. According to the utility model, the problems that the adjustable power supply is large in size and inconvenient to transport, carry and use are solved.

Description

Technical Field

[0001] This manual relates to the field of power supply technology, and in particular to a portable, multi-output adjustable power supply. Background Technology

[0002] Adjustable DC power supplies, due to their advantages such as adjustable voltage and controllable current, are convenient to use and widely applied in various fields of teaching experiments, technical research, and industrial production. However, most adjustable power supplies on the market currently require an external 220V AC mains power supply to generate output. Their working principle involves using a bridge rectifier circuit and a capacitor filter circuit to first convert AC to DC. This process places high demands on the components of the rectifier bridge. After rectification and filtering, the resulting high-voltage DC needs to be stepped down. This process requires a high-frequency PWM (Pulse Width Modulation) signal to control the switching transistor, converting the DC into high-frequency AC at frequencies ranging from tens to hundreds of kHz. This process is highly dependent on the performance of the switching transistor. This AC then needs to be filtered and regulated to obtain a stable DC voltage. This process still requires a high-performance filtering and regulating circuit. Furthermore, to ensure a stable output even when the supply voltage fluctuates, the circuit must incorporate a feedback circuit to feed the output back to the control circuit, controlling the PWM duty cycle to achieve stable output.

[0003] Traditional adjustable power supplies require a complex process: first converting AC to DC, then back to AC, and finally obtaining the desired DC power. Furthermore, the high supply voltage places high demands on the voltage withstand capabilities of components. All these factors contribute to the bulky size of adjustable power supplies, making them inconvenient to transport, carry, and use. Due to their operating principle, current switching power supplies struggle to generate both positive and negative voltages simultaneously, or require complex setups or external wiring. Moreover, the output current of most adjustable power supplies is not adjustable. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the prior art, the present invention provides a portable multi-output adjustable power supply that solves the problems of large size, inconvenience in transportation, carrying and use of adjustable power supplies.

[0005] To achieve the aforementioned objectives, the present invention employs the following technical solution: a portable, multi-output adjustable power supply, comprising:

[0006] The power supply module includes a battery protection circuit, a charging circuit, and a voltage conversion circuit.

[0007] The first output module includes the main circuit and the feedback and control circuit.

[0008] The second output module includes the main circuit, the current sampling circuit, and the control circuits for the CC and CV sections;

[0009] The third output module includes a first output circuit and a second output circuit with the same structure; wherein the first output circuit and the second output circuit include a main circuit, a sampling part of the output circuit, and a feedback and control circuit.

[0010] Further, the power supply module includes: a positive terminal BAT+ at the input and output ends, a negative terminal BAT- at the input end, a negative terminal GND at the output end, an intermediate node BAT1, an intermediate node USB101, a chip U103, resistors R101, R102, R103, R106, R107, R109, R110, R111, R112, R113, R114, R115, capacitors C101 and C104, polarized capacitors C105, C106, C107, C108, C109, C110, C111, C112, and C113, and an electrical... The circuit consists of capacitor C114, diodes D101 and D102, LED101, LED102, LED103, chip U101, chip U102, test point TP101, MOSFETs Q101, Q102, and Q103. The positive terminal BAT+ of the input and output terminals is connected to one end of resistor R110, the positive terminal of polarized capacitor C105, one end of capacitor C104, one end of capacitor C112, pin 6 of chip U102, one end of resistor R109, and one end of resistor R115, respectively. The other end of resistor R110 is connected to pin 5 of chip U103 and one end of capacitor C106. The other end of capacitor C107 is connected to one end of capacitor C107, the negative terminal BAT- of the input, the sixth pin of chip U103, and the source of MOSFET Q103. The other end of capacitor C107 is connected to one end of resistor R111 and the fourth pin of chip U103. The other end of resistor R111 is connected to the intermediate node BAT1. The gate of MOSFET Q103 is connected to the first pin of chip U103. The drain of MOSFET Q102 is connected to the drain of MOSFET Q103. The gate of MOSFET Q102 is connected to the second pin of chip U103. The source of MOSFET Q102, one end of resistor R113, the negative terminal of polarized capacitor C105, the other end of capacitor C104, and capacitor C11... One end of resistor R102, one end of capacitor C108, and the negative terminal GND of the output are connected. The other end of resistor R113 is connected to the third pin of chip U103. The other end of capacitor C112 is connected to the ninth pin of chip U102 and one end of resistor R106. The other end of capacitor C108 is connected to one end of resistor R112. The other end of resistor R112 is connected to the fifth pin of chip U102. The other end of resistor R109 is connected to the seventh pin of chip U102. The other end of resistor R115 is connected to one end of resistor R114. The other end of resistor R114 is connected to one end of inductor L101 and one end of resistor R108. The other end of resistor R108 is connected to the eighth pin of chip U102.The other end of inductor L101 is connected to pins 5, 6, 7, and 8 of MOSFET Q101 and the cathode of diode D102, respectively. The anode of diode D102 is grounded. Pin 4 of MOSFET Q101 is connected to pin 10 of chip U102. The other end of resistor R106 is connected to pins 1, 2, and 3 of MOSFET Q101, the cathode of diode D101, one end of capacitor C114, and one end of resistor R107, respectively. The anode of diode D101 is connected to the VBUS terminal. The other end of resistor R107 is connected to LED10... The positive terminal of LED102 is connected to the positive terminal of LED103. The negative terminal of LED102 is connected to the third pin of chip U102. The negative terminal of LED103 is connected to the fourth pin of chip U102. The other end of capacitor C114 is connected to the first pin of chip U102. The second pin of chip U102 is grounded. The first, twelfth, thirteenth, and fourteenth pins of intermediate node USB101 are grounded. The second and eleventh pins of intermediate node USB101 are connected to the VBUS terminal. The third and ninth pins of intermediate node USB101 are unconnected. The fourth pin of intermediate node USB101 is connected to the chip U102. Pin 7 of U101 is connected. Pins 5 and 7 of intermediate node USB101 are connected to pin 5 of chip U101. Pins 6 and 8 of intermediate node USB101 are connected to pin 4 of chip U101. Pin 10 of intermediate node USB101 is connected to pin 6 of chip U101. Test point TP101 is connected to pin 11 of intermediate node USB101. Pin 1 of chip U101 is connected to one end of resistor R101, pin 2 of chip U101, and one end of capacitor C101. Pins 3, 9, and 11 of chip U101 are grounded. Pin 8 of chip U101... One pin of the LED U101 is connected to one end of resistor R103. The tenth pin of chip U101 is connected to the negative terminal of LED101. The other end of capacitor C101 is grounded. The positive terminal of LED101 is connected to one end of resistor R102. The other ends of resistors R101, R102, and R103 are connected to the VBUS terminal. The negative terminal of polarized capacitor C109, one end of capacitor C110, one end of capacitor C111, and one end of capacitor C112 are grounded. The positive terminal of polarized capacitor C109, the other end of capacitor C110, the other end of capacitor C111, and the other end of capacitor C112 are each connected to the VBUS terminal.

[0011] Further, the first output module includes: input terminal VIN, resistors R201, R202, R203, R204, R205, R206, R207, R208, R209, R210, capacitors C201, C202, C203, C206, C207, C208, C209, C210, C211, C212, polarized capacitors C213 and C214, MOSFETs Q201 and Q202, test points TP201, TP202, TP203, and TP204, chip U201, and inductor. L201, diode D201, LED201, and output terminal VOUT2; The input terminal VIN is connected to the positive terminal BAT+ of the power supply module output. Input terminal VIN is connected to one end of capacitor C210, one end of capacitor C211, one end of capacitor C212, one end of resistor R201, one end of resistor R202, one end of capacitor C203, the first pin of chip U201, and the fifth, sixth, seventh, and eighth pins of MOSFET Q201. The other ends of capacitors C210, C211, and C212 are grounded. The other end of resistor R201 is connected to the fourth pin of chip U201. Test point TP203 is located at... Resistor R201 is connected to the fourth pin of chip U201. The other end of resistor R202 is connected to one end of resistor R203 and the second pin of chip U201. Test point TP202 is located between resistor R202 and the second pin of chip U201. The third pin of chip U201 is connected to one end of resistor R209. The fifth pin of chip U201 is connected to one end of capacitor C201. The seventh pin of chip U201 is connected to one end of capacitor C202. The eighth pin of chip U201 is connected to one end of capacitor C206, one end of capacitor C207, one end of resistor R205, and one end of resistor R206. The other end of capacitor C206 is connected to one end of resistor R207. Chip U201... Pin 9 of chip U201 is connected to the other ends of resistor R207 and capacitor C207 respectively. Test point TP201 is located between resistors R205 and R206, and test point TP204 is located between resistor R207 and capacitor C207. Pin 10 of chip U201 is grounded. Pin 11 of chip U201 is connected to one end of resistor R208. Pin 12 of chip U201 is connected to one end of resistor R204, and pins 1, 2, and 3 of MOSFET Q202 respectively. Pin 15 of chip U201 is connected to pin 4 of MOSFET Q202. Pin 16 of chip U201 is connected to the anode of diode D201 and one end of capacitor C209 respectively.Pin 18 of chip U201 is connected to the cathode of diode D201 and one end of capacitor C208. Pin 19 of chip U201 is connected to pin 4 of MOSFET Q201. Pin 20 of chip U201 is connected to the other end of capacitor C208, pins 1, 2, and 3 of MOSFET Q201, pins 5, 6, 7, and 8 of MOSFET Q202, and one end of inductor L201. The other end of inductor L201, the other end of resistor R205, one end of resistor R210, one end of capacitor C214, and the positive terminal of polarized capacitor C213 are grounded. The other end of resistor R210 is connected to the positive terminal of LED201. The other ends of resistors R203 and R209, the other end of capacitor C201, pin 6 of chip U201, the other ends of capacitors C203 and C202, pins 13, 14, 17, and 21 of chip U201, the other ends of resistors R208, C209, R204, and R206, the negative terminal of LED201, the other end of capacitor C214, and the negative terminal of polarized capacitor C213 are all connected to output terminal VOUT2. Output terminal VOUT2 is connected to the negative terminal GND of the power supply module's output.

[0012] Further, the second output module includes: input terminal VIN, rectified output terminal VOUT3, final output terminal VO3, resistors R301, R302, R303, R304, R305, R306, R307, R308, R309, R310, R311, R312, R313, R314, R315, R316, R317, R318, R319, R320, R321, R322, R323, R324, R325, R326, and capacitor C301. Capacitors C302, C303, C304, C305, C306, C307, C308, C309, C310, C311, C312, C313, C314, C315, C316, C317; Polarized capacitors C318, C319, C320, C321, C322, C323, C324, C325; Polarized capacitors C326, C327, C328; Chip U301; Chip U306; Diodes D301, D302, and D30... 3. Diodes D304, D305, D306, D307, D308, D309; LED301, LED302; USB301 (intermediate node); Chips U301, U302, U303, U304, U305, U306.1, U306.2; MOSFETs Q301, Q302, Q303, Q304, and SW302; The input terminal VIN is connected to the positive terminal BAT+ of the power supply module output, and the input terminal VIN is connected to the fifth and sixth pins of MOSFET Q301 respectively. Pins 7, 8, the positive terminal of polarized capacitor C318, one end of capacitor C319, one end of capacitor C320, one end of capacitor C321, the positive terminal of diode D301, the third pin of chip U302, and the third pin of chip U305 are connected. The first pin of MOSFET Q301 is connected to the second pin of MOSFET Q301, the third pin of MOSFET Q301, the fifth pin, the sixth pin, the seventh pin, the eighth pin of MOSFET Q302, one end of inductor L301, the other end of capacitor C316, and the twenty-eighth pin of chip U302. The fourth pin of MOSFET Q301 is connected to the twenty-seventh pin of chip U302.The first pin of MOSFET Q302 is connected to the second and third pins of MOSFET Q302, the anode of diode D308, one end of resistor R321, one end of resistor R325, and the first, second, and third pins of MOSFET Q304. The other end of resistor R321 is connected to one end of resistor R326. The fourth pin of MOSFET Q302 is connected to the twenty-fifth pin of chip U302. The fourth pin of MOSFET Q304 is connected to the twenty-first pin of chip U302. The fifth pin of MOSFET Q304 is connected to the sixth, seventh, and eighth pins of MOSFET Q304, and the first, second, and third pins of MOSFET Q303. The three pins of the rectifier are connected to the positive terminal of diode D309, the other end of inductor L301, the eighteenth pin of chip U302, and one end of capacitor C317. The fourth pin of MOSFET Q303 is connected to the nineteenth pin of chip U302. The fifth, sixth, seventh, and eighth pins of MOSFET Q303 and the negative terminal of diode D309 are connected to the rectifier output terminal VOUT3. The other end of resistor R325 is connected to one end of capacitor C328 and the sixteenth pin of chip U302. The other end of capacitor C328 is connected to the other end of resistor R326 and the fifteenth pin of chip U302. The first pin of chip U302 is connected to the first and sixth pins of SW302 and resistor R308. One end of the resistor R308 is connected to ground. The cathode of diode D301 is connected to one end of resistor R314. The second pin of chip U302 is connected to the other end of resistor R314 and one end of capacitor C310, with the other end of capacitor C310 grounded. The fourth pin of chip U302 is connected to one end of resistor R311, with the other end of resistor R311 grounded. The fifth, tenth, eleventh, thirteenth, fourteenth, twenty-second, and twenty-ninth pins of chip U302 are grounded. The sixth pin of chip U302 is connected to one end of resistor R313, with the other end of resistor R313 grounded. The seventh pin of chip U302 is connected to one end of capacitor C313, with capacitor C314 grounded. The other end of pin 3 is grounded. Pin 8 of chip U302 is connected to one end of capacitor C315, and the other end of capacitor C315 is grounded. Pin 9 of chip U302 is connected to the anodes of diodes D305 and D306 respectively. Pin 12 of chip U302 is connected to the rectified output terminal VOUT3. Pin 17 of chip U302 is the PGOOD pin. Pin 20 of chip U302 is connected to the cathode of diode D303 and the other end of capacitor C317 respectively. Pin 23 of chip U302 is connected to one end of capacitor C309, the anode of diode D302, and the anode of diode D303 respectively. Pin 24 of chip U302 is connected to one end of capacitor C305.The other ends of capacitors C305 and C309 are grounded. Pin 26 of chip U302 is connected to the cathode of diode D302 and one end of capacitor C316, respectively. The cathode of polarized capacitor C318, the other end of capacitor C319, the other end of capacitor C320, and the other end of capacitor C321 are grounded. The cathode of diode D305 is connected to pin 1 of chip U306.2, one end of capacitor C302, and one end of capacitor C303. The other end of capacitor C303 is connected to one end of resistor R304. The other end of resistor R304 is connected to the other end of capacitor C302, one end of resistor R302, and pin 2 of chip U306.2, respectively. Pin 3 of chip U306.2... The pin is connected to one end of resistor R303. The eighth pin of chip U306.2 is connected to the first and sixth pins of SW302 and one end of capacitor C304. The other end of capacitor C304 is grounded. The other end of resistor R302 is connected to the sixth pin of chip U301. The first and second pins of chip U301 are grounded. The third pin of chip U301 is connected to the first and sixth pins of SW302 and one end of capacitor C301. The other end of capacitor C301 is grounded. The fourth pin of chip U301 is connected to one end of resistor R305, one end of resistor R306, and the rectified output terminal VOUT3. The other end of resistor R305 is connected to the other end of resistor R306 and the chip U306.2. Pin 5 of chip 301 is connected to the final output terminal VO3. The other end of resistor R303 is connected to pin 2 of chip U303. Pin 1 of chip U303 is connected to one end of resistor R310. Pin 3 of chip U303 is grounded. Pins 4, 5, and 9 of chip U303 are connected to one end of capacitor C306, pin 1 of SW302, and pin 6 of SW302, respectively. The other end of capacitor C306 is grounded. Pin 10 of chip U303 is connected to grounded capacitor C314. Pin 6 of chip U303 is connected to pin 12 of chip U304. Pin 8 of chip U303 is connected to pin 13 of chip U304. Pin 7 of chip U303 is connected to pin 10 of chip U304. Pin 16 of chip U304 is connected to the other end of resistor R310, which is connected to pin 5 of chip U306.1. Pin 6 of chip U306.1 is connected to one end of resistor R309, one end of capacitor C311, and one end of resistor R312. The other end of resistor R312 is connected to one end of capacitor C312. The other end of capacitor C312 is connected to the other end of capacitor C311, pin 7 of chip U306.1, and the cathode of diode D306. Pin 4 of chip U304 is connected to one end of capacitor C307. Pin 6 of chip U304 is connected to one end of capacitor C308. Pin 8 of chip U304, the other end of capacitor C307, and the other end of capacitor C308 are grounded.Pins 6 and 7 of chip U304, the other end of resistor R317, the cathodes of diodes D304 and D307 are grounded. Pin 9 of chip U304 is connected to one end of resistor R316. Pin 10 of chip U304 is connected to one end of resistor R315. Pin 11 of chip U304 is connected to one end of resistors R317 and R318 respectively. The other end of resistor R315 is connected to pins B6 and A6 of intermediate node USB301 respectively. The other end of resistor R316 is connected to pins B7 and A7 of intermediate node USB301. The other end of resistor R318 is connected to grounding switch SW301. The anode of diode D304 is connected to pins 1 and 6 of SW302. Pins A1, A12, B1, B12, pin 1, pin 2, pin 3, and pin 4 of intermediate node USB301 are grounded. Pin A4 of intermediate node USB301 is connected to pins A9, B4, and B9 of intermediate node USB301, the anode of diode D307, and the anode of LED301. Pin A5 of intermediate node USB301 is connected to grounding resistor R301, pin B5 of intermediate node USB301 is connected to grounding resistor R307, the negative terminal of LED301 is connected to grounding resistor R319, the positive terminal of LED302 is connected to the first and sixth pins of SW302, the negative terminal of LED302 is connected to grounding resistor R320, the second and fifth pins of SW302 are connected to grounding capacitors C327 and C325 respectively, and the second and fourth pins of chip U305. The first pin of chip U305... The pin is grounded. The other end of resistor R309 is connected to one end of grounding resistor R324 and resistor R323 respectively. The other end of resistor R323 is connected to one end of resistor R322. The other end of resistor R322, one end of capacitor C322, one end of capacitor C323, one end of capacitor C324, and the positive terminal of polarized capacitor C326 are connected to the rectified output terminal VOUT3. The other ends of capacitors C322, C323, and C324, and the negative terminal of polarized capacitor C326 are grounded. Finally, the output terminal VO3 is connected to the negative terminal GND of the power supply module's output.

[0013] Further, the first output circuit and the second output circuit include: an input terminal VIN, capacitors C401, C402, C403, C404, C405, C406, and C407, a polarized capacitor C408, C409, C410, C411, C412, C413, C414, C415, C416, C417, C418, C419, C420, C421, and C422, and resistors R401, R402, R403, R404, R405, R406, R407, and R408, and an electrical... Resistors R409, R411, R412, R413, R414, R415, R416, R417, R418, R419, R420, R421, R422; Test point TP401, TP402, TP403, TP404, TP405, TP406, TP407; Chip U401, U402, U403, U404, U405, U406.1, U406.2; Terminal block H401; Intermediate node USB401; LED401; LEDLE D402, MOSFET Q401, MOSFET Q402, SW401, diodes D401, D402, D403, D404, D405, main circuit output VOUT4, and final output VO4; The input terminal VIN is connected to the positive terminal BAT+ of the power supply module output. The input terminal VIN is connected to grounding capacitors C401, C402, and C403, the first pin of chip U401, the fifth, sixth, seventh, and eighth pins of MOSFET Q401, and the third pin of chip U402. The third pin of chip U401 is connected to one end of resistor R401. The fourth pin of chip U401 is connected to... Connect the first and sixth pins of SW401 and one end of resistor R402. Connect the fifth pin of chip U401 to ground capacitor C404. Connect the sixth, eighth, fourteenth, seventeenth, and 21st pins of chip U401 to ground. Connect the ninth pin of chip U401 to test point TP401, the input of diode D404, and the input of diode D405. Connect the tenth pin of chip U401 to one end of inductor L401, one end of resistor R405, the positive terminal of polarized capacitor C408, ground capacitors C409, C410, and C411, one end of resistor R408, the fourth pin of chip U404, and the final output terminal VO4.Pin 11 of chip U401 is connected to one end of resistor R403. Pin 13 of chip U401, the other end of resistor R404, the other end of resistor R407, and the negative terminal of polarized capacitor C408 are grounded. Pin 15 of chip U401 is connected to pin 4 of MOSFET Q402. Pin 16 of chip U401 is connected to the input terminal of diode D401. Pin 18 of chip U401 is connected to the output terminal of diode D401 and one end of capacitor C407. Pin 19 of chip U401 is connected to pin 4 of MOSFET Q401. Pin 20 of chip U401 is connected to the other end of capacitor C407. Pins 1, 2, and 3 of MOSFET Q401 are respectively... The MOSFET Q402 is connected to pins 5, 6, 7, and 8, and the other end of inductor L401. Pins 1, 2, and 3 of MOSFET Q402 are connected to pin 12 of chip U401 and one end of resistor R404, respectively. The other end of resistor R405 is connected to the other end of resistor R406. The other end of resistor R408 is connected to pin 5 of chip U404 and the main circuit output terminal VOUT4, respectively. Pin 1 of chip U402 is grounded. Pin 2 of chip U402 is connected to pin 4 of chip U402, grounding capacitor C413, grounding capacitor C414, pin 2 of SW401, and pin 5 of SW401, respectively. Pins 1 and 6 of SW401 are connected to pins 4, 5, 6, 7, and 8, and the other end of inductor L401, respectively. Connect the positive terminal of LED402 to the third pin of chip U404. Connect the negative terminal of LED402 to ground resistor R416. Ground the first and second pins of chip U404. Connect the sixth pin of chip U404 to the other end of resistor R419. Connect the other end of diode D404 to the first pin of chip U406.1, test point TP406, one end of capacitor C420, and one end of resistor R421. Connect the other end of resistor R421 to one end of capacitor C418. Connect the other end of capacitor C418 to the other end of capacitor C420, one end of resistor R417, and the second pin of chip U406.1. Connect the third pin of chip U406.1 to resistor R419. One end of resistor R418 is connected. The eighth pin of chip U406.1 is connected to the first and sixth pins of SW401 and the ground capacitor C421. The fourth pin of chip U406.1 is grounded. The other end of resistor R418 is connected to the first pin of chip U403. The output of diode D405 is connected to one end of resistor R422, one end of capacitor C422, the seventh pin of chip U406.2, and the test point TP407. The other end of resistor R422 is connected to one end of capacitor C419. The other end of capacitor C419 is connected to the other end of capacitor C422, the sixth pin of chip U406.2, and one end of resistor R419. The fifth pin of chip U406.2 is connected to one end of resistor R420.The other end of resistor R420 is connected to pin 2 of chip U403. Pin 3 of chip U403 is grounded. Pin 10 of chip U403 is connected to grounding capacitor C415. Pin 4 of chip U403 is connected to pin 15 of chip U405. Pin 5 of chip U403 is connected to pin 14 of chip U405. Pin 6 of chip U403 is connected to pin 12 of chip U405. Pin 7 of chip U403 is connected to pin 16 of chip U405. Pin 8 of chip U403 is connected to pin 13 of chip U405. The ninth pin of chip U405 is connected to the first and sixth pins of SW401 and the grounding capacitor C412, respectively. The fourth pin of chip U405 is connected to the grounding capacitor C416. The sixth and seventh pins of chip U405 are connected to the grounding capacitor C417, one end of resistor R414, the output of diode D402, and the output of diode D403, respectively. The eighth pin of chip U405 is grounded. The ninth pin of chip U405 is connected to one end of resistor R412 and the second pin of terminal H401, respectively. The tenth pin of chip U405 is connected to one end of resistor R411 and the terminal H401, respectively. The first pin of H401 is connected, the third pin of terminal H401 is grounded, the eleventh pin of chip U405 is connected to the other end of resistor R414 and one end of resistor R415, the other end of resistor R411 is connected to pins A6 and B6 of intermediate node USB401, the other end of resistor R412 is connected to pins A7 and B7 of intermediate node USB401, the other end of resistor R416 is connected to grounding switch SW402, and the A1, A12, B1, B12, first, second, and third pins of intermediate node USB401 are connected to grounding switch SW402. With four pins grounded, pins A4, A9, B4, and B9 of the intermediate node USB401 are connected to the positive terminal of LED401 and the input terminal of diode D403, respectively. The input terminal of diode D402 is connected to pins 1 and 6 of SW401. The negative terminal of LED401 is connected to grounding resistor R410. Pin A5 of the intermediate node USB401 is connected to grounding resistor R409, and pin B5 of the intermediate node USB401 is connected to grounding resistor R413. Finally, the output terminal VO4 is connected to the negative terminal GND of the power supply module's output.

[0014] The beneficial effects of this utility model are as follows: This circuit connection method can effectively solve the power supply problem in the complex circuits of actual power systems, especially since it can generate positive and negative voltage outputs simultaneously, providing convenience for experiments and projects; by realizing adjustable output current, it can effectively avoid the problem of excessive current causing damage to the load when powering on; this power supply does not require 220V AC mains power as input, and only a lithium battery is needed for the circuit to work normally. The circuit principle and voltage conversion process are simple and safer; this power supply is small in size and light in weight, and does not require an external power supply, making it very portable and convenient for users to use, carry, and transfer. Attached Figure Description

[0015] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0016] Figure 1 This is a schematic diagram of a portable multi-output adjustable power supply module according to some embodiments of this specification;

[0017] Figure 2 This is an exemplary schematic diagram of the main circuit of the power supply module according to some embodiments of this specification;

[0018] Figure 3 This is an exemplary schematic diagram of a lithium battery charging USB input circuit according to some embodiments of this specification;

[0019] Figure 4 This is an exemplary schematic diagram of a lithium battery charging PD protocol decoy circuit according to some embodiments of this specification;

[0020] Figure 5 This is an exemplary schematic diagram of a lithium battery charging input capacitor filter circuit according to some embodiments of this specification;

[0021] Figure 6 This is an exemplary schematic diagram illustrating the -12V voltage output principle according to some embodiments of this specification;

[0022] Figure 7 This is an exemplary schematic diagram of the +12V voltage output BUCK-BOOST main circuit according to some embodiments of this specification;

[0023] Figure 8-19 This is an exemplary schematic diagram of a +12V voltage BUCK-BOOST control circuit according to some embodiments of this specification;

[0024] Figure 20This is an exemplary schematic diagram of a +12V voltage CC comparator circuit according to some embodiments of this specification;

[0025] Figure 21 This is an exemplary schematic diagram of a +12V voltage CV comparator circuit according to some embodiments of this specification;

[0026] Figure 22 This is an exemplary schematic diagram of a +12V voltage COMP compensation circuit according to some embodiments of this specification;

[0027] Figures 23-26 This is an exemplary schematic diagram of a +12V voltage input capacitor filter circuit according to some embodiments of this specification;

[0028] Figures 27-31 This is an exemplary schematic diagram of a capacitor filter and voltage divider circuit for the +12V voltage output terminal, as shown in some embodiments of this specification.

[0029] Figures 32-33 This is an exemplary schematic diagram of a +12V voltage output current sampling and amplification circuit according to some embodiments of this specification;

[0030] Figure 34 This is an exemplary schematic diagram of a +12V voltage DAC control circuit according to some embodiments of this specification;

[0031] Figures 35-36 This is an exemplary schematic diagram of a +12V voltage microcontroller download circuit according to some embodiments of this specification;

[0032] Figures 37-38 This is an exemplary schematic diagram of a +12V voltage LED indicator circuit according to some embodiments of this specification;

[0033] Figure 39 This is an exemplary schematic diagram of a +12V voltage LDO power supply circuit according to some embodiments of this specification;

[0034] Figure 40 This is an exemplary schematic diagram of a +12V USB program download circuit according to some embodiments of this specification;

[0035] Figure 41 This is an exemplary schematic diagram of a +12V voltage microcontroller control circuit according to some embodiments of this specification;

[0036] Figure 42 This is an exemplary schematic diagram of a +12V microcontroller power supply circuit according to some embodiments of this specification;

[0037] Figures 43-45This is an exemplary schematic diagram of the main circuit of a +5V voltage BUCK circuit according to some embodiments of this specification;

[0038] Figure 46 and Figure 47 This is an exemplary schematic diagram of a +5V voltage LDO power supply and indication circuit according to some embodiments of this specification;

[0039] Figure 48 This is an exemplary schematic diagram of a +5V voltage and current detection amplifier circuit according to some embodiments of this specification;

[0040] Figure 49 This is an exemplary schematic diagram of a +5V voltage DAC control circuit according to some embodiments of this specification;

[0041] Figure 50 This is an exemplary schematic diagram of a +5V voltage microcontroller control circuit according to some embodiments of this specification;

[0042] Figure 51 This is an exemplary schematic diagram of a +5V voltage CC vs. CV comparison circuit according to some embodiments of this specification;

[0043] Figures 52-55 This is an exemplary schematic diagram of a +5V USB program download circuit according to some embodiments of this specification;

[0044] Figure 56 This is an exemplary schematic diagram of a +5V microcontroller power supply circuit according to some embodiments of this specification;

[0045] Figure 57 This is an exemplary schematic diagram of a +5V microcontroller serial port download circuit according to some embodiments of this specification. Detailed Implementation

[0046] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0047] Example

[0048] Figure 1 This is a schematic diagram of a portable multi-output adjustable power supply module according to some embodiments of this specification.

[0049] In some embodiments, the portable multi-output adjustable power supply may include a power supply module, a first output module, a second output module, and a third output module.

[0050] The power supply module includes a battery protection circuit, a charging circuit, and a voltage conversion circuit.

[0051] In some embodiments, such as Figures 2-5As shown, the power supply module includes: a positive terminal BAT+ for the input and output terminals, a negative terminal BAT- for the input terminal, a negative terminal GND for the output terminal, an intermediate node BAT1, an intermediate node USB101, a chip U103, resistors R101, R102, R103, R106, R107, R109, R110, R111, R112, R113, R114, R115, capacitors C101 and C104, polarized capacitors C105, C106, C107, C108, C109, C110, C111, C112, C113, and C114. C114, diodes D101 and D102, LED101, LED102, LED103, chip U101, chip U102, test point TP101, MOSFETs Q101, Q102, and Q103; The positive terminal BAT+ of the input and output terminals is connected to one end of resistor R110, the positive terminal of polarized capacitor C105, one end of capacitor C104, one end of capacitor C112, the sixth pin of chip U102, one end of resistor R109, and one end of resistor R115, respectively. The other end of resistor R110 is connected to the fifth pin of chip U103 and one end of capacitor C106, respectively. The other end of capacitor C107 is connected to one end of capacitor C107, the negative terminal BAT- of the input, the sixth pin of chip U103, and the source of MOSFET Q103. The other end of capacitor C107 is connected to one end of resistor R111 and the fourth pin of chip U103. The other end of resistor R111 is connected to the intermediate node BAT1. The gate of MOSFET Q103 is connected to the first pin of chip U103. The drain of MOSFET Q102 is connected to the drain of MOSFET Q103. The gate of MOSFET Q102 is connected to the second pin of chip U103. The source of MOSFET Q102, one end of resistor R113, the negative terminal of polarized capacitor C105, the other end of capacitor C104, and capacitor C11... One end of resistor R102, one end of capacitor C108, and the negative terminal GND of the output are connected. The other end of resistor R113 is connected to the third pin of chip U103. The other end of capacitor C112 is connected to the ninth pin of chip U102 and one end of resistor R106. The other end of capacitor C108 is connected to one end of resistor R112. The other end of resistor R112 is connected to the fifth pin of chip U102. The other end of resistor R109 is connected to the seventh pin of chip U102. The other end of resistor R115 is connected to one end of resistor R114. The other end of resistor R114 is connected to one end of inductor L101 and one end of resistor R108. The other end of resistor R108 is connected to the eighth pin of chip U102.The other end of inductor L101 is connected to pins 5, 6, 7, and 8 of MOSFET Q101 and the cathode of diode D102, respectively. The anode of diode D102 is grounded. Pin 4 of MOSFET Q101 is connected to pin 10 of chip U102. The other end of resistor R106 is connected to pins 1, 2, and 3 of MOSFET Q101, the cathode of diode D101, one end of capacitor C114, and one end of resistor R107, respectively. The anode of diode D101 is connected to the VBUS terminal. The other end of resistor R107 is connected to LED10... The positive terminal of LED102 is connected to the positive terminal of LED103. The negative terminal of LED102 is connected to the third pin of chip U102. The negative terminal of LED103 is connected to the fourth pin of chip U102. The other end of capacitor C114 is connected to the first pin of chip U102. The second pin of chip U102 is grounded. The first, twelfth, thirteenth, and fourteenth pins of intermediate node USB101 are grounded. The second and eleventh pins of intermediate node USB101 are connected to the VBUS terminal. The third and ninth pins of intermediate node USB101 are unconnected. The fourth pin of intermediate node USB101 is connected to the chip U102. Pin 7 of U101 is connected. Pins 5 and 7 of intermediate node USB101 are connected to pin 5 of chip U101. Pins 6 and 8 of intermediate node USB101 are connected to pin 4 of chip U101. Pin 10 of intermediate node USB101 is connected to pin 6 of chip U101. Test point TP101 is connected to pin 11 of intermediate node USB101. Pin 1 of chip U101 is connected to one end of resistor R101, pin 2 of chip U101, and one end of capacitor C101. Pins 3, 9, and 11 of chip U101 are grounded. Pin 8 of chip U101... One pin of the LED U101 is connected to one end of resistor R103. The tenth pin of chip U101 is connected to the negative terminal of LED101. The other end of capacitor C101 is grounded. The positive terminal of LED101 is connected to one end of resistor R102. The other ends of resistors R101, R102, and R103 are connected to the VBUS terminal. The negative terminal of polarized capacitor C109, one end of capacitor C110, one end of capacitor C111, and one end of capacitor C112 are grounded. The positive terminal of polarized capacitor C109, the other end of capacitor C110, the other end of capacitor C111, and the other end of capacitor C112 are each connected to the VBUS terminal.

[0052] Preferably, the intermediate node USB101 can be of model TYPE-C-16PIN.

[0053] Preferably, chip U101 can be model CH224K, chip U102 can be model PW4242, and chip U103 can be model PW7052.

[0054] Preferably, MOSFET Q101 can be model AO4407A, MOSFET Q102 can be model IRF8736TRPBF-VB, and MOSFET Q103 can be model IRF8736TRPBF-VB.

[0055] In some embodiments, the power supply module can be powered by two 21700 lithium batteries with a minimum voltage of 5V, a typical voltage of 7.4V, and a maximum voltage of 8.4V.

[0056] In some embodiments, the power supply module can use a PW7052 chip to protect the battery, adopt a Type-C interface, and use a CH224K decoy chip to induce the generation of a 20V charging voltage, which is then stepped down by a PW4242 chip to charge the two 21700 lithium batteries.

[0057] In some embodiments, the power supply module can supply power to the first output module, the second output module, and the third output module by switching a switch and changing the supply voltage.

[0058] In some embodiments, the power supply module may include a VBUS terminal. The VBUS terminal is connected to the eleventh pin of the intermediate node USB101, one end of resistor R101, one end of resistor R102, one end of resistor R103, the positive terminal of polarized capacitor C109, grounding capacitor C110, grounding capacitor C111, grounding capacitor C113, and the positive terminal of diode D101.

[0059] The power supply module includes a battery protection circuit, a charging circuit, and a voltage conversion circuit. In the battery protection circuit, the battery's negative terminal (BAT-) is connected to pin 6 (VSS) of the PW7052, and the battery's positive terminal (BAT+) is connected to pin 5 (VDD) of the PW7052 after current limiting by resistor R10, to power the PW7052 chip. The battery's intermediate node (BAT1) is connected to pin 4 (VC) of the PW7052 after current limiting by resistor R11, to detect the voltage of each of the two lithium battery strings and achieve voltage balancing protection. Pins 1 (DOUT) and 2 (COUT) of the PW7052 chip are control signal output terminals, connected to the gates of MOSFETs Q2 and Q3 respectively. The source of Q2 is connected to the battery's negative terminal (BAT-), and the source of Q3 is connected to GND, while the drains of Q2 and Q3 are connected. When the battery experiences overvoltage, short circuit, or other abnormal conditions, the DOUT and COUT control signals will be shut off, causing Q1 and Q2 to turn off, thus cutting off the circuit to protect the battery. In the charging circuit, the input terminal uses a Type-C interface. Its first, twelfth, thirteenth, and fourteenth pins are grounded, and the second and eleventh pins are VBUS terminals. The VBUS terminals are filtered by polarized capacitors C109, C110, and C111, and then current-limited by resistor R101 to power the CH224K chip. The fifth pin CC1 and the eleventh pin CC2 of the Type-C interface are connected to the seventh pin CC1 and the sixth pin CC2 of the CH224K chip, respectively. The eighth pin DN1 and the sixth pin DN2 of the Type-C interface are connected to the fifth pin DM of the CH224K chip. The seventh pin DP1 and the ninth pin DP2 of the Type-C interface are connected to the fourth pin DP of the CH224K chip. Through this connection method, the CH224K chip can trigger the PD protocol to generate a 20V DC voltage at the VBUS terminal.In the voltage conversion circuit, the VBUS terminal generated by the deception is used as the input. After current limiting by diode D101 and resistor R106, it is connected to pin 9 (VCC) of the PW4242 step-down chip for power supply. Pin 10 (DRV) of the PW4242 chip is the control signal for controlling the switching of transistor Q101. It is connected to the gate of Q101, the source of Q101 is connected to the VBUS terminal, and the drain is the output terminal. It is connected to inductor L101 for filtering, and then after passing through two current sampling resistors R114 and R115 in series, it is connected to the positive terminal B of the battery. AT+ charges the battery; pins 8 (CSP) and 7 (VBAT) of the PW4242 chip are connected to the current sampling resistors R114 and R115 via resistors R108 and R109 respectively, enabling the chip to sample the charging current; pin 6 (VFB) of the PW2422 chip is connected to the battery's positive terminal (BAT+) to collect the battery voltage; with this connection, the PW2422 can control the charging voltage and charging current by changing parameters such as the duty cycle of the control signal DRV.

[0060] The first output module includes the main circuit and the feedback and control circuit.

[0061] In some embodiments, such as Figure 6As shown, the first output module includes: input terminal VIN, resistors R201, R202, R203, R204, R205, R206, R207, R208, R209, R210, capacitors C201, C202, C203, C206, C207, C208, C209, C210, C211, C212, polarized capacitors C213 and C214, MOSFETs Q201 and Q202, test points TP201, TP202, TP203, and TP204, chip U201, and inductor L. 201, diode D201, light-emitting diode LED201, and output terminal VOUT2; wherein, the input terminal VIN is connected to the positive terminal BAT+ of the power supply module output terminal, and the input terminal VIN is connected to one end of capacitor C210, one end of capacitor C211, one end of capacitor C212, one end of resistor R201, one end of resistor R202, one end of capacitor C203, the first pin of chip U201, and the fifth, sixth, seventh, and eighth pins of MOSFET Q201. The other ends of capacitors C210, C211, and C212 are grounded, and the other end of resistor R201 is connected to the fourth pin of chip U201. Test point TP203 is located at the power supply module. Resistor R201 is connected to the fourth pin of chip U201. The other end of resistor R202 is connected to one end of resistor R203 and the second pin of chip U201. Test point TP202 is located between resistor R202 and the second pin of chip U201. The third pin of chip U201 is connected to one end of resistor R209. The fifth pin of chip U201 is connected to one end of capacitor C201. The seventh pin of chip U201 is connected to one end of capacitor C202. The eighth pin of chip U201 is connected to one end of capacitor C206, one end of capacitor C207, one end of resistor R205, and one end of resistor R206. The other end of capacitor C206 is connected to one end of resistor R207. Chip U201... Pin 9 of chip U201 is connected to the other ends of resistor R207 and capacitor C207 respectively. Test point TP201 is located between resistors R205 and R206, and test point TP204 is located between resistor R207 and capacitor C207. Pin 10 of chip U201 is grounded. Pin 11 of chip U201 is connected to one end of resistor R208. Pin 12 of chip U201 is connected to one end of resistor R204, and pins 1, 2, and 3 of MOSFET Q202 respectively. Pin 15 of chip U201 is connected to pin 4 of MOSFET Q202. Pin 16 of chip U201 is connected to the anode of diode D201 and one end of capacitor C209 respectively.Pin 18 of chip U201 is connected to the cathode of diode D201 and one end of capacitor C208. Pin 19 of chip U201 is connected to pin 4 of MOSFET Q201. Pin 20 of chip U201 is connected to the other end of capacitor C208, pins 1, 2, and 3 of MOSFET Q201, pins 5, 6, 7, and 8 of MOSFET Q202, and one end of inductor L201. The other end of inductor L201, the other end of resistor R205, one end of resistor R210, one end of capacitor C214, and the positive terminal of polarized capacitor C213 are grounded. The other end of resistor R210 is connected to the positive terminal of LED201. The other ends of resistors R203 and R209, the other end of capacitor C201, pin 6 of chip U201, the other ends of capacitors C203 and C202, pins 13, 14, 17, and 21 of chip U201, the other ends of resistors R208, C209, R204, and R206, the negative terminal of LED201, the other end of capacitor C214, and the negative terminal of polarized capacitor C213 are all connected to output terminal VOUT2. Output terminal VOUT2 is connected to the negative terminal GND of the power supply module's output.

[0062] Preferably, the chip U201 can be model LM25116MHX / NOPB.

[0063] Preferably, MOSFET Q201 can be of model CJAC40N04, and MOSFET Q202 can be of model CJAC40N04.

[0064] The first output module is a -12V voltage output circuit, which adopts an inverted BUCK architecture. The LM25116 is used as the control chip for the BUCK circuit. Approximately 7.4V voltage is input from the battery side. After being filtered by several capacitors, it enters the first pin VIN of the LM25116 chip to power the chip. At the same time, it is input to two CJAC40N04 MOSFETs for switching regulation. After being filtered by inductor L201 and several capacitors, the output voltage is generated. The output voltage is divided by R205 and R206, and the result is fed back to the feedback pin FB of the chip to realize the voltage loop control function.

[0065] The main circuit of the -12V voltage output circuit uses the LM25116 chip as the main controller. The PWM signals generated by pins 19 (HO) and 15 (LO) of the chip are used to control the switching of two MOSFETs, which are connected to the gates of MOSFETs Q201 and Q202 respectively. The drain of Q201 is connected to the power input terminal VIN, and the source is connected to the drain of Q202. The source of Q202 is connected to the output terminal VOUT2 through the current sampling resistor R204. The output terminal is grounded for filtering through capacitors C212 and C211. At the same time, the node between the source of Q201 and the drain of Q202 is connected to pin 20 (SW) of the LM25116. The SW terminal is grounded after being filtered through inductor L1.

[0066] The feedback and control circuit for the -12V voltage output is divided into two parts: voltage feedback and current feedback. The voltage feedback circuit uses series voltage divider resistors R205 and R206 for voltage division feedback. The connection point between the two resistors serves as the voltage division result, connected to pin 8 (FB) of the main control chip LM25116 to acquire the output voltage. When the LM25116 receives the voltage feedback signal, it automatically adjusts the PWM at the HO and LO terminals to control the output voltage. The current feedback circuit uses current sampling resistor R204. When current flows through the output terminal, a voltage is generated across R4, which is connected to pin 12 (CS) of the LM25116 to monitor the output current.

[0067] The second output module includes the main circuit, the current sampling circuit, and the control circuits for the CC and CV sections.

[0068] In some embodiments, such as Figures 7-42As shown, the second output module includes: input terminal VIN, rectified output terminal VOUT3, final output terminal VO3, resistors R301, R302, R303, R304, R305, R306, R307, R308, R309, R310, R311, R312, R313, R314, R315, R316, R317, R318, R319, R320, R321, R322, R323, R324, R325, R326, capacitor C301, and capacitor... Capacitors C302, C303, C304, C305, C306, C307, C308, C309, C310, C311, C312, C313, C314, C315, C316, C317, Polarized capacitors C318, C319, C320, C321, C322, C323, C324, C325, Polarized capacitors C326, C327, C328, Chip U301, Chip U306, Diode D301, Diode D302, Diode D303 The following diodes are used: D304, D305, D306, D307, D308, D309; LED301, LED302; USB301 (intermediate node); U301, U302, U303, U304, U305, U306.1, U306.2; Q301, Q302, Q303, Q304; and SW302. The input terminal VIN is connected to the positive terminal BAT+ of the power supply module output. The input terminal VIN is also connected to the fifth and sixth pins of MOSFET Q301. Pins 7, 8, the positive terminal of polarized capacitor C318, one end of capacitor C319, one end of capacitor C320, one end of capacitor C321, the positive terminal of diode D301, the third pin of chip U302, and the third pin of chip U305 are connected. The first pin of MOSFET Q301 is connected to the second pin of MOSFET Q301, the third pin of MOSFET Q301, the fifth pin, the sixth pin, the seventh pin, the eighth pin of MOSFET Q302, one end of inductor L301, the other end of capacitor C316, and the twenty-eighth pin of chip U302. The fourth pin of MOSFET Q301 is connected to the twenty-seventh pin of chip U302.The first pin of MOSFET Q302 is connected to the second and third pins of MOSFET Q302, the anode of diode D308, one end of resistor R321, one end of resistor R325, and the first, second, and third pins of MOSFET Q304. The other end of resistor R321 is connected to one end of resistor R326. The fourth pin of MOSFET Q302 is connected to the twenty-fifth pin of chip U302. The fourth pin of MOSFET Q304 is connected to the twenty-first pin of chip U302. The fifth pin of MOSFET Q304 is connected to the sixth, seventh, and eighth pins of MOSFET Q304, and the first, second, and third pins of MOSFET Q303. The three pins of the rectifier are connected to the positive terminal of diode D309, the other end of inductor L301, the eighteenth pin of chip U302, and one end of capacitor C317. The fourth pin of MOSFET Q303 is connected to the nineteenth pin of chip U302. The fifth, sixth, seventh, and eighth pins of MOSFET Q303 and the negative terminal of diode D309 are connected to the rectifier output terminal VOUT3. The other end of resistor R325 is connected to one end of capacitor C328 and the sixteenth pin of chip U302. The other end of capacitor C328 is connected to the other end of resistor R326 and the fifteenth pin of chip U302. The first pin of chip U302 is connected to the first and sixth pins of SW302 and resistor R308. One end of the resistor R308 is connected to ground. The cathode of diode D301 is connected to one end of resistor R314. The second pin of chip U302 is connected to the other end of resistor R314 and one end of capacitor C310, with the other end of capacitor C310 grounded. The fourth pin of chip U302 is connected to one end of resistor R311, with the other end of resistor R311 grounded. The fifth, tenth, eleventh, thirteenth, fourteenth, twenty-second, and twenty-ninth pins of chip U302 are grounded. The sixth pin of chip U302 is connected to one end of resistor R313, with the other end of resistor R313 grounded. The seventh pin of chip U302 is connected to one end of capacitor C313, with capacitor C314 grounded. The other end of pin 3 is grounded. Pin 8 of chip U302 is connected to one end of capacitor C315, and the other end of capacitor C315 is grounded. Pin 9 of chip U302 is connected to the anodes of diodes D305 and D306 respectively. Pin 12 of chip U302 is connected to the rectified output terminal VOUT3. Pin 17 of chip U302 is the PGOOD pin. Pin 20 of chip U302 is connected to the cathode of diode D303 and the other end of capacitor C317 respectively. Pin 23 of chip U302 is connected to one end of capacitor C309, the anode of diode D302, and the anode of diode D303 respectively. Pin 24 of chip U302 is connected to one end of capacitor C305.The other ends of capacitors C305 and C309 are grounded. Pin 26 of chip U302 is connected to the cathode of diode D302 and one end of capacitor C316, respectively. The cathode of polarized capacitor C318, the other end of capacitor C319, the other end of capacitor C320, and the other end of capacitor C321 are grounded. The cathode of diode D305 is connected to pin 1 of chip U306.2, one end of capacitor C302, and one end of capacitor C303. The other end of capacitor C303 is connected to one end of resistor R304. The other end of resistor R304 is connected to the other end of capacitor C302, one end of resistor R302, and pin 2 of chip U306.2, respectively. Pin 3 of chip U306.2... The pin is connected to one end of resistor R303. The eighth pin of chip U306.2 is connected to the first and sixth pins of SW302 and one end of capacitor C304. The other end of capacitor C304 is grounded. The other end of resistor R302 is connected to the sixth pin of chip U301. The first and second pins of chip U301 are grounded. The third pin of chip U301 is connected to the first and sixth pins of SW302 and one end of capacitor C301. The other end of capacitor C301 is grounded. The fourth pin of chip U301 is connected to one end of resistor R305, one end of resistor R306, and the rectified output terminal VOUT3. The other end of resistor R305 is connected to the other end of resistor R306 and the chip U306.2. Pin 5 of chip 301 is connected to the final output terminal VO3. The other end of resistor R303 is connected to pin 2 of chip U303. Pin 1 of chip U303 is connected to one end of resistor R310. Pin 3 of chip U303 is grounded. Pins 4, 5, and 9 of chip U303 are connected to one end of capacitor C306, pin 1 of SW302, and pin 6 of SW302, respectively. The other end of capacitor C306 is grounded. Pin 10 of chip U303 is connected to grounded capacitor C314. Pin 6 of chip U303 is connected to pin 12 of chip U304. Pin 8 of chip U303 is connected to pin 13 of chip U304. Pin 7 of chip U303 is connected to pin 10 of chip U304. Pin 16 of chip U304 is connected to the other end of resistor R310, which is connected to pin 5 of chip U306.1. Pin 6 of chip U306.1 is connected to one end of resistor R309, one end of capacitor C311, and one end of resistor R312. The other end of resistor R312 is connected to one end of capacitor C312. The other end of capacitor C312 is connected to the other end of capacitor C311, pin 7 of chip U306.1, and the cathode of diode D306. Pin 4 of chip U304 is connected to one end of capacitor C307. Pin 6 of chip U304 is connected to one end of capacitor C308. Pin 8 of chip U304, the other end of capacitor C307, and the other end of capacitor C308 are grounded.Pins 6 and 7 of chip U304, the other end of resistor R317, the cathodes of diodes D304 and D307 are grounded. Pin 9 of chip U304 is connected to one end of resistor R316. Pin 10 of chip U304 is connected to one end of resistor R315. Pin 11 of chip U304 is connected to one end of resistors R317 and R318 respectively. The other end of resistor R315 is connected to pins B6 and A6 of intermediate node USB301 respectively. The other end of resistor R316 is connected to pins B7 and A7 of intermediate node USB301. The connection is as follows: the other end of resistor R318 is connected to grounding switch SW301; the anode of diode D304 is connected to pins 1 and 6 of SW302; pins A1, A12, B1, B12, pin 1, pin 2, pin 3, and pin 4 of intermediate node USB301 are grounded; pin A4 of intermediate node USB301 is connected to pins A9, B4, and B9 of intermediate node USB301, the anode of diode D307, and the anode of LED301. Pin A5 of intermediate node USB301 is connected to grounding resistor R301, pin B5 of intermediate node USB301 is connected to grounding resistor R307, the negative terminal of LED301 is connected to grounding resistor R319, the positive terminal of LED302 is connected to the first and sixth pins of SW302, the negative terminal of LED302 is connected to grounding resistor R320, the second and fifth pins of SW302 are connected to grounding capacitors C327 and C325 respectively, and the second and fourth pins of chip U305. The first pin of chip U305... The pin is grounded. The other end of resistor R309 is connected to one end of grounding resistor R324 and resistor R323 respectively. The other end of resistor R323 is connected to one end of resistor R322. The other end of resistor R322, one end of capacitor C322, one end of capacitor C323, one end of capacitor C324, and the positive terminal of polarized capacitor C326 are connected to the rectified output terminal VOUT3. The other ends of capacitors C322, C323, and C324, and the negative terminal of polarized capacitor C326 are grounded. Finally, the output terminal VO3 is connected to the negative terminal GND of the power supply module's output.

[0069] Preferably, chip U301 can be model INA210AIDCKRU, chip U302 can be model LM5175PWPR, chip U303 can be model DAC8562SDGSR, chip U304 can be model STC8H8K64U-45I-SOP16, chip U305 can be model AMS1117-5.0, and chips U306.1 and U306.2 can be model SGM8552XS8G / TR.

[0070] Preferably, MOSFETs Q301, Q302, Q303 and Q304 can be of model AO4468.

[0071] Preferably, the intermediate node USB301 can be model KH-TYPE-C-16P.

[0072] The second output module is a +12V voltage output circuit. The main circuit of the +12V voltage output circuit uses four MOSFETs (Q301~Q304) and inductor L301 for full-bridge rectification. The four MOSFETs are connected in a full-bridge rectifier circuit, with the gates of Q301~Q304 connected to pins 27 (HDRV1), 25 (LDRV1), 19 (HDRV2), and 21 (LDRV2) of the LM5175 chip, respectively, as inputs for the PWM control signals of the four MOSFETs. The drain of Q301 is connected to the input power supply VIN, and its source is connected to the drain of Q302. The intermediate node is connected to pin 28 (SW1) of the LM5175. The sources of Q302 and Q304 are connected in parallel. The circuit is grounded through a current sampling resistor R321; the drain of Q304 is connected to the source of Q303, and the intermediate node is connected to pin 18 SW2 of LM5175. At the same time, an inductor L301 is connected between the two nodes SW1 and SW2 for filtering; the drain of Q303 serves as the output terminal VOUT of the circuit; when the circuit is in CV mode, the two drive signals HDRV1 and HDRV2 drive the MOSFETs Q301 and Q304 to work, and the circuit is in BOOST mode; when the circuit is in CC mode and the output needs to be stepped down, the two drive signals LDRV1 and LDRV2 drive the MOSFETs Q302 and Q303 to work, and the circuit is in BUCK mode.

[0073] The circuit for the +12V voltage output current sampling section receives its input from the output VOUT after full-bridge rectification. This input passes through a network formed by two current sampling resistors R305 and R306 connected in parallel, serving as the final output VO of the entire circuit. When current flows through the sampling resistors R305 and R306, a voltage drop is generated across them, which is used to determine the output current. The terminal with the higher potential (i.e., VOUT terminal) is named IFB_P, and the terminal with the lower potential (i.e., VO terminal) is named IFB_N. These terminals are connected to the fourth input pin IN+ and the fifth input pin IN- of the current sense amplifier INA210, respectively. After detecting the potential difference between IFB_P and IFB_N, the current sense amplifier amplifies this voltage by a factor of 200 and outputs the current sampling signal ISENS through the sixth output pin.

[0074] The control circuit for the +12V voltage output CC and CV sections receives inputs from the current sampling signal ISENS and the voltage sampling signal VSENS. These signals are connected to the inverting inputs of two operational amplifiers, SGM8552, via resistors R302 and R309, respectively. Simultaneously, two control signals, ISET and VSET, from the DAC output, are connected to the non-inverting inputs of the two operational amplifiers. The two sampled signals are compared with the two control signals, and the comparison results are output through the two operational amplifiers to obtain the CC control signal CC_SIG and the CV control signal CV_SIG. CC_SIG and CV_SIG are connected to the outputs of diodes D305 and D306, respectively. Connecting the inputs of D305 and D306 together connects to pin 9 (COMP) of the BUCK-BOOST main control chip LM5175. Upon receiving the COMP signal, the LM5175 performs compensation control on its controlled full-bridge rectifier circuit to achieve control of CC and CV.

[0075] The third output module includes a first output circuit and a second output circuit with the same structure; wherein the first output circuit and the second output circuit include a main circuit, a sampling part of the output circuit, and a feedback and control circuit.

[0076] In some embodiments, such as Figures 43-57As shown, the first output circuit and the second output circuit include: input terminal VIN, capacitors C401, C402, C403, C404, C405, C406, and C407, polarized capacitors C408, C409, C410, C411, C412, C413, C414, C415, C416, C417, C418, C419, C420, C421, and C422, and resistors R401, R402, R403, R404, R405, R406, R407, R408, and R... 409, Resistor R411, Resistor R412, Resistor R413, Resistor R414, Resistor R415, Resistor R416, Resistor R417, Resistor R418, Resistor R419, Resistor R420, Resistor R421, Resistor R422, Test Point TP401, Test Point TP402, Test Point TP403, Test Point TP404, Test Point TP405, Test Point TP406, Test Point TP407, Chip U401, Chip U402, Chip U403, Chip U404, Chip U405, Chip U406.1, Chip U406.2, Terminal Block H401, Intermediate Node USB401, Light Emitting Diode LED401, Light Emitting Diode LED 402, MOSFETs Q401 and Q402, SW401, diodes D401, D402, D403, D404, D405, main circuit output VOUT4, and final output VO4; The input terminal VIN is connected to the positive terminal BAT+ of the power supply module output. The input terminal VIN is connected to grounding capacitors C401, C402, and C403, the first pin of chip U401, the fifth, sixth, seventh, and eighth pins of MOSFET Q401, and the third pin of chip U402. The third pin of chip U401 is connected to one end of resistor R401. The fourth pin of chip U401 is connected to... Connect the first and sixth pins of SW401 and one end of resistor R402. Connect the fifth pin of chip U401 to ground capacitor C404. Connect the sixth, eighth, fourteenth, seventeenth, and 21st pins of chip U401 to ground. Connect the ninth pin of chip U401 to test point TP401, the input of diode D404, and the input of diode D405. Connect the tenth pin of chip U401 to one end of inductor L401, one end of resistor R405, the positive terminal of polarized capacitor C408, ground capacitors C409, C410, and C411, one end of resistor R408, the fourth pin of chip U404, and the final output terminal VO4.Pin 11 of chip U401 is connected to one end of resistor R403. Pin 13 of chip U401, the other end of resistor R404, the other end of resistor R407, and the negative terminal of polarized capacitor C408 are grounded. Pin 15 of chip U401 is connected to pin 4 of MOSFET Q402. Pin 16 of chip U401 is connected to the input terminal of diode D401. Pin 18 of chip U401 is connected to the output terminal of diode D401 and one end of capacitor C407. Pin 19 of chip U401 is connected to pin 4 of MOSFET Q401. Pin 20 of chip U401 is connected to the other end of capacitor C407. Pins 1, 2, and 3 of MOSFET Q401 are respectively... The MOSFET Q402 is connected to pins 5, 6, 7, and 8, and the other end of inductor L401. Pins 1, 2, and 3 of MOSFET Q402 are connected to pin 12 of chip U401 and one end of resistor R404, respectively. The other end of resistor R405 is connected to the other end of resistor R406. The other end of resistor R408 is connected to pin 5 of chip U404 and the main circuit output terminal VOUT4, respectively. Pin 1 of chip U402 is grounded. Pin 2 of chip U402 is connected to pin 4 of chip U402, grounding capacitor C413, grounding capacitor C414, pin 2 of SW401, and pin 5 of SW401, respectively. Pins 1 and 6 of SW401 are connected to pins 4, 5, 6, 7, and 8, and the other end of inductor L401, respectively. Connect the positive terminal of LED402 to the third pin of chip U404. Connect the negative terminal of LED402 to ground resistor R416. Ground the first and second pins of chip U404. Connect the sixth pin of chip U404 to the other end of resistor R419. Connect the other end of diode D404 to the first pin of chip U406.1, test point TP406, one end of capacitor C420, and one end of resistor R421. Connect the other end of resistor R421 to one end of capacitor C418. Connect the other end of capacitor C418 to the other end of capacitor C420, one end of resistor R417, and the second pin of chip U406.1. Connect the third pin of chip U406.1 to resistor R419. One end of resistor R418 is connected. The eighth pin of chip U406.1 is connected to the first and sixth pins of SW401 and the ground capacitor C421. The fourth pin of chip U406.1 is grounded. The other end of resistor R418 is connected to the first pin of chip U403. The output of diode D405 is connected to one end of resistor R422, one end of capacitor C422, the seventh pin of chip U406.2, and the test point TP407. The other end of resistor R422 is connected to one end of capacitor C419. The other end of capacitor C419 is connected to the other end of capacitor C422, the sixth pin of chip U406.2, and one end of resistor R419. The fifth pin of chip U406.2 is connected to one end of resistor R420.The other end of resistor R420 is connected to pin 2 of chip U403. Pin 3 of chip U403 is grounded. Pin 10 of chip U403 is connected to grounding capacitor C415. Pin 4 of chip U403 is connected to pin 15 of chip U405. Pin 5 of chip U403 is connected to pin 14 of chip U405. Pin 6 of chip U403 is connected to pin 12 of chip U405. Pin 7 of chip U403 is connected to pin 16 of chip U405. Pin 8 of chip U403 is connected to pin 13 of chip U405. The ninth pin of chip U405 is connected to the first and sixth pins of SW401 and the grounding capacitor C412, respectively. The fourth pin of chip U405 is connected to the grounding capacitor C416. The sixth and seventh pins of chip U405 are connected to the grounding capacitor C417, one end of resistor R414, the output of diode D402, and the output of diode D403, respectively. The eighth pin of chip U405 is grounded. The ninth pin of chip U405 is connected to one end of resistor R412 and the second pin of terminal H401, respectively. The tenth pin of chip U405 is connected to one end of resistor R411 and the terminal H401, respectively. The first pin of H401 is connected, the third pin of terminal H401 is grounded, the eleventh pin of chip U405 is connected to the other end of resistor R414 and one end of resistor R415, the other end of resistor R411 is connected to pins A6 and B6 of intermediate node USB401, the other end of resistor R412 is connected to pins A7 and B7 of intermediate node USB401, the other end of resistor R416 is connected to grounding switch SW402, and the A1, A12, B1, B12, first, second, and third pins of intermediate node USB401 are connected to grounding switch SW402. With four pins grounded, pins A4, A9, B4, and B9 of the intermediate node USB401 are connected to the positive terminal of LED401 and the input terminal of diode D403, respectively. The input terminal of diode D402 is connected to pins 1 and 6 of SW401. The negative terminal of LED401 is connected to grounding resistor R410. Pin A5 of the intermediate node USB401 is connected to grounding resistor R409, and pin B5 of the intermediate node USB401 is connected to grounding resistor R413. Finally, the output terminal VO4 is connected to the negative terminal GND of the power supply module's output.

[0077] Preferably, chip U401 can be model LM25116MHX / NOPB, chip U402 can be model AMS1117-5.0, chip U403 can be model DAC8562SDGSR, chip U404 can be model INA210AIDCKR, chip U405 can be model STC8H8K64U-45I-SOP16, and chips U406.1 and U406.2 can be model GS8552-SR.

[0078] Preferably, MOSFETs Q401 and Q402 can be selected from model AO4468.

[0079] Preferably, the intermediate node USB401 can be model KH-TYPE-C-16P.

[0080] Preferably, the grounding switch SW402 can be model TS-1088-AR02016.

[0081] The third output module includes +5V and +3.3V voltage output circuits. The main circuits of these +5V and +3.3V voltage output circuits also use the LM25116 chip as the main controller. The PWM signals generated by the 19th pin (HO) and 15th pin (LO) of this chip are used to control the switching of two MOSFETs, which are connected to the gates of MOSFETs Q401 and Q402, respectively. The drain of Q401 is connected to the power input terminal VIN, and the source is connected to the drain of Q402. The source of Q402 is grounded through the current sampling resistor R404. At the same time, the node between the source of Q401 and the drain of Q402 is connected to the 20th pin SW of LM25116. The SW terminal is filtered by inductor L401 and polarized capacitors C408, C409, C410, and C411, and then connected to the output terminal VO. When current flows through the output terminal, a voltage is generated across the current sampling resistor R404. Its high potential and low potential are connected to the 13th pin CSG and the 12th pin CS of LM25116, respectively.

[0082] The sampling section of the +5V and +3.3V voltage output circuit is divided into voltage sampling and current sampling. Voltage sampling is achieved using a series voltage divider with resistors R405, R406, and R407. The first end of R405 is connected to the final output terminal VO3, and the last end of R407 is grounded, with its other end serving as the voltage sampling signal VFB. Current sampling input comes from the main circuit output terminal VOUT4, and after passing through the current sampling resistor R408, the final output VO of the entire circuit is obtained. When current flows through sampling resistors R405 and R406, a voltage drop is generated across them, which determines the output current. The terminal with the higher potential (VOUT terminal) is named IFB_P, and the terminal with the lower potential (VO terminal) is named IFB_N. These are connected to the fourth input pin IN+ and the fifth input pin IN- of the current sense amplifier INA210, respectively. The current sense amplifier detects the potential difference between IFB_P and IFB_N and amplifies it by a factor of 200, outputting the current sampling signal IFB through the sixth output pin.

[0083] The feedback and control circuit for the +5V and +3.3V voltage outputs receives inputs from the current sampling signal IFB and the voltage sampling signal VFB, which are connected to the inverting inputs of two operational amplifiers SGM8552 via resistors R417 and R419, respectively. Simultaneously, two control signals ISET and VSET from the DAC output are connected to the non-inverting inputs of the two operational amplifiers. The two sampled signals are compared with the two control signals, and the comparison results are output through the two operational amplifiers to obtain the CC and CV control signals. These signals are connected to the outputs of diodes D405 and D404, respectively. The inputs of D405 and D406 are connected together and then to pin 9 (COMP) of the BUCK-BOOST main control chip LM25116. Upon receiving the COMP signal, the LM25116 performs compensation control on its controlled PWM signal to achieve control of CC and CV.

[0084] In some embodiments of this specification, this circuit connection method can effectively solve the power supply problem in complex circuits of actual power systems, especially by simultaneously generating positive and negative voltage outputs, which provides convenience for experiments and projects; by realizing adjustable output current, it can effectively avoid the problem of excessive current causing damage to the load when powering on; this power supply does not require 220V AC mains power as input, and only a lithium battery is needed for the circuit to work normally. The circuit principle and voltage conversion process are simple and safer; this power supply is small in size and light in weight, and does not require an external power supply, making it very portable and convenient for users to use, carry and transfer.

Claims

1. A portable multi-output adjustable power supply, characterized by, Comprise: Power supply module, including battery protection circuit, charging part circuit and voltage conversion part circuit; The first output module includes the circuit of main loop and feedback and control part; The second output module includes the circuit of main loop, current sampling part and CC, CV part control circuit; The third output module includes the first output circuit and the second output circuit with the same structure; wherein, the first output circuit and the second output circuit include the main loop, the sampling part of output circuit and the feedback and control control circuit; wherein, the power supply module is connected with the first output module, the second output module, the first output circuit and the second output circuit respectively; The power supply module uses lithium battery as power supply; The power supply module can include VBUS end; VBUS end is connected with the eleventh pin of intermediate node USB101, one end of resistance R101, one end of resistance R102, one end of resistance R103, positive pole of polarity polar capacitor C109, ground capacitor C110, ground capacitor C111, ground capacitor C113 and positive pole of diode D101 respectively.

2. The portable multi-output adjustable power supply of claim 1, wherein, The power supply module comprises: a positive electrode BAT+ of an input end and an output end, a negative electrode BAT- of the input end, a negative electrode GND of the output end, a middle node BAT1, a middle node USB101, a chip U103, resistors R101, R102, R103, R106, R107, R109, R110, R111, R112, R113, R114, R115, capacitors C101, C104, a polar capacitor C105, capacitors C106, C107, C108, a polar capacitor C109, capacitors C110, C111, C112, C113, C114, diodes D101, D102, light-emitting diodes LED101, LED102, LED103, a chip U101, a chip U102, a test point TP101, MOS tubes Q101, Q102 and Q103; wherein the positive electrode BAT+ of the input end and the output end is connected with one end of the resistor R110, a positive electrode of the polar capacitor C105, one end of the capacitor C104, one end of the capacitor C112, a sixth pin of the chip U102, one end of the resistor R109 and one end of the resistor R115 respectively, the other end of the resistor R110 is connected with a fifth pin of the chip U103 and one end of the capacitor C106 respectively, the other end of the capacitor C106 is connected with one end of the capacitor C107, the negative electrode BAT- of the input end, a sixth pin of the chip U103 and a source electrode of the MOS tube Q103 respectively, the other end of the capacitor C107 is connected with one end of the resistor R111 and a fourth pin of the chip U103 respectively, the other end of the resistor R111 is connected with the middle node BAT1, a gate electrode of the MOS tube Q103 is connected with a first pin of the chip U103, a drain electrode of the MOS tube Q102 is connected with a drain electrode of the MOS tube Q103, a gate electrode of the MOS tube Q102 is connected with a second pin of the chip U103, a source electrode of the MOS tube Q102, one end of the resistor R113, a negative electrode of the polar capacitor C105, the other end of the capacitor C104, one end of the capacitor C112, one end of the capacitor C108 and the negative electrode GND of the output end are connected, the other end of the resistor R113 is connected with a third pin of the chip U103, the other end of the capacitor C112 is connected with a ninth pin of the chip U102 and one end of the resistor R106 respectively, the other end of the capacitor C108 is connected with one end of the resistor R112, the other end of the resistor R112 is connected with a fifth pin of the chip U102, the other end of the resistor R109 is connected with a seventh pin of the chip U102, the other end of the resistor R115 is connected with one end of the resistor R114, the other end of the resistor R114 is connected with one end of an inductor L101 and one end of a resistor R108 respectively, the other end of the resistor R108 is connected with an eighth pin of the chip U102.The other end of the inductor L101 is connected with the fifth pin, the sixth pin, the seventh pin, the eighth pin of the MOS tube Q101 and the negative electrode of the diode D102 respectively, the positive electrode of the diode D102 is grounded, the fourth pin of the MOS tube Q101 is connected with the tenth pin of the chip U102, the other end of the resistor R106 is connected with the first pin of the MOS tube Q101, the second pin of the MOS tube Q101, the third pin of the MOS tube Q101, the negative electrode of the diode D101, one end of the capacitor C114 and one end of the resistor R107 respectively, the positive electrode of the diode D101 is connected with the VBUS end, the other end of the resistor R107 is connected with the positive electrode of the light emitting diode LED102 and the positive electrode of the light emitting diode LED103 respectively, the negative electrode of the light emitting diode LED102 is connected with the third pin of the chip U102, the negative electrode of the light emitting diode LED103 is connected with the fourth pin of the chip U102, the other end of the capacitor C114 is connected with the first pin of the chip U102, the second pin of the chip U102 is grounded, the first pin, the twelfth pin, the thirteenth pin and the fourteenth pin of the intermediate node USB101 are grounded, the second pin and the eleventh pin of the intermediate node USB101 are connected with the VBUS end, the third pin and the ninth pin of the intermediate node USB101 are empty, the fourth pin of the intermediate node USB101 is connected with the seventh pin of the chip U101, the fifth pin and the seventh pin of the intermediate node USB101 are connected with the fifth pin of the chip U101 respectively, the sixth pin and the eighth pin of the intermediate node USB101 are connected with the fourth pin of the chip U101 respectively, the tenth pin of the intermediate node USB101 is connected with the sixth pin of the chip U101, the test point TP101 is connected with the eleventh pin of the intermediate node USB101, the first pin of the chip U101 is connected with one end of the resistor R101, the second pin of the chip U101 and one end of the capacitor C101 respectively, the third pin, the ninth pin and the eleventh pin of the chip U101 are grounded, the eighth pin of the chip U101 is connected with one end of the resistor R103, the tenth pin of the chip U101 is connected with the negative electrode of the light emitting diode LED101, the other end of the capacitor C101 is grounded, the positive electrode of the light emitting diode LED101 is connected with one end of the resistor R102, the other end of the resistor R101, the other end of the resistor R102 and the other end of the resistor R103 are connected with the VBUS end, the negative electrode of the polarity capacitor C109, one end of the capacitor C110, one end of the capacitor C111 and one end of the capacitor C112 are grounded, the positive electrode of the polarity capacitor C109, the other end of the capacitor C110, the other end of the capacitor C111 and the other end of the capacitor C112 are connected with the VBUS end respectively.

3. The portable multi-output adjustable power supply of claim 1, wherein, The first output module comprises: an input end VIN, a resistor R201, a resistor R202, a resistor R203, a resistor R204, a resistor R205, a resistor R206, a resistor R207, a resistor R208, a resistor R209, a capacitor C201, a capacitor C202, a capacitor C203, a capacitor C206, a capacitor C207, a capacitor C208, a capacitor C209, a capacitor C210, a capacitor C211, a capacitor C212, a polar capacitor C213, a capacitor C214, a MOS tube Q201, a MOS tube Q202, a test point TP201, a test point TP202, a test point TP203, a test point TP204, a chip U201, an inductor L201, a diode D201, a light-emitting diode LED201 and an output end VOUT2; wherein the input end VIN is connected with the positive electrode BAT+ of the output end of the power supply module, the input end VIN is connected with one end of the capacitor C210, one end of the capacitor C211, one end of the capacitor C212, one end of the resistor R201, one end of the resistor R202, one end of the capacitor C203, the first pin of the chip U201, the fifth pin, the sixth pin, the seventh pin and the eighth pin of the MOS tube Q201 respectively, the other end of the capacitor C210, the other end of the capacitor C211 and the other end of the capacitor C212 are grounded, the other end of the resistor R201 is connected with the fourth pin of the chip U201, the test point TP203 is located between the resistor R201 and the fourth pin of the chip U201, the other end of the resistor R202 is connected with one end of the resistor R203 and the second pin of the chip U201 respectively, the test point TP202 is located between the resistor R202 and the second pin of the chip U201, the third pin of the chip U201 is connected with one end of the resistor R209, the fifth pin of the chip U201 is connected with one end of the capacitor C201, the seventh pin of the chip U201 is connected with one end of the capacitor C202, the eighth pin of the chip U201 is connected with one end of the capacitor C206, one end of the capacitor C207, one end of the resistor R205 and one end of the resistor R206 respectively, the other end of the capacitor C206 is connected with one end of the resistor R207, the ninth pin of the chip U201 is connected with the other end of the resistor R207 and the other end of the capacitor C207 respectively, the test point TP201 is located between the resistor R205 and the resistor R206, the test point TP204 is located between the resistor R207 and the capacitor C207, the tenth pin of the chip U201 is grounded, the eleventh pin of the chip U201 is connected with one end of the resistor R208, the twelfth pin of the chip U201 is connected with one end of the resistor R204, the first pin, the second pin and the third pin of the MOS tube Q202 respectively, the fifteenth pin of the chip U201 is connected with the fourth pin of the MOS tube Q202, the sixteenth pin of the chip U201 is connected with the positive electrode of the diode D201 and one end of the capacitor C209 respectively.The eighteenth pin of the chip U201 is connected with the negative pole of the diode D201 and one end of the capacitor C208 respectively, the nineteenth pin of the chip U201 is connected with the fourth pin of the MOS Q201, the twentieth pin of the chip U201 is connected with the other end of the capacitor C208, the first pin, the second pin, the third pin of the MOS Q201, the fifth pin, the sixth pin, the seventh pin, the eighth pin of the MOS Q202 and one end of the inductor L201 respectively, the other end of the inductor L201, the other end of the resistor R205, one end of the resistor R210, one end of the capacitor C214 and the positive pole of the polarized capacitor C213 are grounded, the other end of the resistor R210 is connected with the positive pole of the light emitting diode LED201, the other end of the resistor R203, the other end of the resistor R209, the other end of the capacitor C201, the sixth pin of the chip U201, the other end of the capacitor C203, the other end of the capacitor C202, the thirteenth pin of the chip U201, the fourteenth pin of the chip U201, the seventeenth pin of the chip U201, the twenty first pin of the chip U201, the other end of the resistor R208, the other end of the capacitor C209, the other end of the resistor R204, the other end of the resistor R206, the negative pole of the light emitting diode LED201, the other end of the capacitor C214 and the negative pole of the polarized capacitor C213 are connected with the output terminal VOUT2 respectively, the output terminal VOUT2 is connected with the negative pole GND of the output terminal of the power supply module.

4. The portable multi-output adjustable power supply of claim 1, wherein, The second output module comprises: an input end VIN, a rectification output end VOUT3, a final output end VO3, resistors R301, R302, R303, R304, R305, R306, R307, R308, R309, R310, R311, R312, R313, R314, R315, R316, R317, R318, R319, R320, R321, R322, R323, R324, R325, R326, capacitors C301, C302, C303, C304, C305, C306, C307, C308, C309, C310, C311, C312, C313, C314, C315, C316, C317, polarized capacitor C318, C319, C320, C321, C322, C323, C324, C325, polarized capacitor C326, C327, C328, a chip U306, diodes D301, D302, D303, D304, D305, D306, D307, D308, D309, light-emitting diodes LED301, LED302, an intermediate node USB301, chips U301, U302, U303, U304, U305, U306.1, U306.2, MOS tubes Q301, Q302, Q303, Q304, and SW302; wherein the input end VIN is connected with the positive electrode BAT+ of the power supply module output end, the input end VIN is connected with the fifth pin, the sixth pin, the seventh pin, the eighth pin of the MOS tube Q301, the positive electrode of the polarized capacitor C318, one end of the capacitor C319, one end of the capacitor C320, one end of the capacitor C321, the positive electrode of the diode D301, the third pin of the chip U302, and the third pin of the chip U305, respectively, the first pin of the MOS tube Q301 is connected with the second pin of the MOS tube Q301, the third pin of the MOS tube Q301, the fifth pin, the sixth pin, the seventh pin, the eighth pin of the MOS tube Q302, one end of the inductor L301, the other end of the capacitor C316, and the twenty-eighth pin of the chip U302, respectively, the fourth pin of the MOS tube Q301 is connected with the 27th pin of the chip U302,The first pin of the MOS tube Q302 is connected with the second pin of the MOS tube Q302, the third pin of the MOS tube Q302, the anode of the diode D308, one end of the resistor R321, one end of the resistor R325, the first pin, the second pin and the third pin of the MOS tube Q304 respectively, the other end of the resistor R321 is connected with one end of the resistor R326, the fourth pin of the MOS tube Q302 is connected with the twenty-fifth pin of the chip U302, the fourth pin of the MOS tube Q304 is connected with the twenty-first pin of the chip U302, the fifth pin of the MOS tube Q304 is connected with the sixth pin, the seventh pin, the eighth pin of the MOS tube Q304, the first pin, the second pin, the third pin of the MOS tube Q303, the anode of the diode D309, the other end of the inductor L301, the eighteenth pin of the chip U302 and one end of the capacitor C317 respectively, the fourth pin of the MOS tube Q303 is connected with the nineteenth pin of the chip U302, the fifth pin, the sixth pin, the seventh pin, the eighth pin of the MOS tube Q303 and the cathode of the diode D309 are connected with the rectified output end VOUT3, the other end of the resistor R325 is connected with one end of the capacitor C328 and the sixteenth pin of the chip U302 respectively, the other end of the capacitor C328 is connected with the other end of the resistor R326 and the fifteenth pin of the chip U302 respectively, the first pin of the chip U302 is connected with the first pin and the sixth pin of the SW302 and one end of the resistor R308, the other end of the resistor R308 is grounded, the cathode of the diode D301 is connected with one end of the resistor R314, the second pin of the chip U302 is connected with the other end of the resistor R314 and one end of the capacitor C310 respectively, the other end of the capacitor C310 is grounded, the fourth pin of the chip U302 is connected with one end of the resistor R311, the other end of the resistor R311 is grounded, the fifth pin, the tenth pin, the eleventh pin, the thirteenth pin, the fourteenth pin, the twenty-second pin and the twenty-ninth pin of the chip U302 are grounded, the sixth pin of the chip U302 is connected with one end of the resistor R313, the other end of the resistor R313 is grounded, the seventh pin of the chip U302 is connected with one end of the capacitor C313, the other end of the capacitor C313 is grounded, the eighth pin of the chip U302 is connected with one end of the capacitor C315, the other end of the capacitor C315 is grounded, the ninth pin of the chip U302 is connected with the anode of the diode D305 and the anode of the diode D306 respectively, the twelfth pin of the chip U302 is connected with the rectified output end VOUT3, the seventeenth pin of the chip U302 is the PGOOD pin, the twentieth pin of the chip U302 is connected with the cathode of the diode D303 and the other end of the capacitor C317 respectively, the twenty-third pin of the chip U302 is connected with one end of the capacitor C309, the anode of the diode D302 and the anode of the diode D303 respectively, the twenty-fourth pin of the chip U302 is connected with one end of the capacitor C305,The other end of the capacitor C305 and the other end of the capacitor C309 are grounded, the twenty-sixth pin of the chip U302 is connected with the negative electrode of the diode D302 and the one end of the capacitor C316 respectively, the negative electrode of the polar capacitor C318, the other end of the capacitor C319, the other end of the capacitor C320 and the other end of the capacitor C321 are grounded, the negative electrode of the diode D305 is connected with the first pin of the chip U306.2, the one end of the capacitor C302 and the one end of the capacitor C303, the other end of the capacitor C303 is connected with the one end of the resistor R304, the other end of the resistor R304 is connected with the other end of the capacitor C302, the one end of the resistor R302 and the second pin of the chip U306.2 respectively, the third pin of the chip U306.2 is connected with the one end of the resistor R303, the eighth pin of the chip U306.2 is connected with the first pin and the sixth pin of the SW302 and the one end of the capacitor C304, the other end of the capacitor C304 is grounded, the other end of the resistor R302 is connected with the sixth pin of the chip U301, the first pin and the second pin of the chip U301 are grounded, the third pin of the chip U301 is connected with the first pin, the sixth pin of the SW302 and the one end of the capacitor C301 respectively, the other end of the capacitor C301 is grounded, the fourth pin of the chip U301 is connected with the one end of the resistor R305, the one end of the resistor R306 and the rectified output end VOUT3 respectively, the other end of the resistor R305 is connected with the other end of the resistor R306, the fifth pin of the chip U301 and the final output end VO3 respectively, the other end of the resistor R303 is connected with the second pin of the chip U303, the first pin of the chip U303 is connected with the one end of the resistor R310, the third pin of the chip U303 is grounded, the fourth pin, the fifth pin and the ninth pin of the chip U303 are connected with the one end of the capacitor C306, the first pin and the sixth pin of the SW302 respectively, the other end of the capacitor C306 is grounded, the tenth pin of the chip U303 is connected with the ground capacitor C314, the sixth pin of the chip U303 is connected with the twelfth pin of the chip U304, the eighth pin of the chip U303 is connected with the thirteenth pin of the chip U304, the seventh pin of the chip U303 is connected with the sixteenth pin of the chip U304, the other end of the resistor R310 is connected with the fifth pin of the chip U306.1, the sixth port of the chip U306.1 is connected with the one end of the resistor R309, the one end of the capacitor C311 and the one end of the resistor R312 respectively, the other end of the resistor R312 is connected with the one end of the capacitor C312, the other end of the capacitor C312 is connected with the other end of the capacitor C311, the seventh pin of the chip U306.1 and the negative electrode of the diode D306 respectively, the fourth pin of the chip U304 is connected with the one end of the capacitor C307, the sixth pin of the chip U304 is connected with the one end of the capacitor C308, the eighth pin of the chip U304, the other end of the capacitor C307 and the other end of the capacitor C308 are grounded,The sixth pin and the seventh pin of the chip U304, the other end of the resistor R317, the negative electrode of the diode D304 and the negative electrode of the diode D307 are grounded, the ninth pin of the chip U304 is connected with one end of the resistor R316, the tenth pin of the chip U304 is connected with one end of the resistor R315, the eleventh pin of the chip U304 is connected with one end of the resistor R317 and one end of the resistor R318 respectively, the other end of the resistor R315 is connected with the B6 pin and the A6 pin of the intermediate node USB301 respectively, the other end of the resistor R316 is connected with the B7 pin and the A7 pin of the intermediate node USB301, the other end of the resistor R318 is connected with the grounding switch SW301, the positive electrode of the diode D304 is connected with the first pin and the sixth pin of the SW302 respectively, the A1 pin, the A12 pin, the B1 pin, the B12 pin, the first pin, the second pin, the third pin and the fourth pin of the intermediate node USB301 are grounded, the A4 pin of the intermediate node USB301 is connected with the A9 pin of the intermediate node USB301, the B4 pin of the intermediate node USB301, the B9 pin of the intermediate node USB301, the positive electrode of the diode D307 and the positive electrode of the light emitting diode LED301 respectively, the A5 pin of the intermediate node USB301 is connected with the grounding resistor R301, the B5 pin of the intermediate node USB301 is connected with the grounding resistor R307, the negative electrode of the light emitting diode LED301 is connected with the grounding resistor R319, the positive electrode of the light emitting diode LED302 is connected with the first pin and the sixth pin of the SW302, the negative electrode of the light emitting diode LED302 is connected with the grounding resistor R320, the second pin and the fifth pin of the SW302 are connected with the grounding capacitor C327, the grounding capacitor C325, the second pin and the fourth pin of the chip U305 respectively, the first pin of the chip U305 is grounded, the other end of the resistor R309 is connected with the grounding resistor R324 and one end of the resistor R323 respectively, the other end of the resistor R323 is connected with one end of the resistor R322, the other end of the resistor R322, one end of the capacitor C322, one end of the capacitor C323, one end of the capacitor C324 and the positive electrode of the polarity capacitor C326 are connected with the rectifier output end VOUT3 respectively, the other end of the capacitor C322, the other end of the capacitor C323, the other end of the capacitor C324 and the negative electrode of the polarity capacitor C326 are grounded, and the final output end VO3 is connected with the negative electrode GND of the output end of the power supply module.

5. The portable multi-output adjustable power supply of claim 1, wherein, The first output circuit and the second output circuit comprise: an input end VIN, a capacitor C401, a capacitor C402, a capacitor C403, a capacitor C404, a capacitor C405, a capacitor C406, a capacitor C407, a polar capacitor C408, a capacitor C409, a capacitor C410, a capacitor C411, a capacitor C412, a capacitor C413, a capacitor C414, a capacitor C415, a capacitor C416, a capacitor C417, a capacitor C418, a capacitor C419, a capacitor C420, a capacitor C421, a capacitor C422, a resistor R401, a resistor R402, a resistor R403, a resistor R404, a resistor R405, a resistor R406, a resistor R407, a resistor R408, a resistor R409, a resistor R411, a resistor R412, a resistor R413, a resistor R414, a resistor R415, a resistor R416, a resistor R417, a resistor R418, a resistor R419, a resistor R420, a resistor R421, a resistor R422, a test point TP401, a test point TP402, a test point TP403, a test point TP404, a test point TP405, a test point TP406, a test point TP407, a chip U401, a chip U402, a chip U403, a chip U404, a chip U405, a chip U406.1, a chip U406.2, a terminal H401, an intermediate node USB401, a light-emitting diode LED401, a light-emitting diode LED402, a MOS tube Q401, a MOS tube Q402, a SW401, a diode D401, a diode D402, a diode D403, a diode D404, a diode D405, a main circuit output end VOUT4, and a final output end VO4; wherein the input end VIN is connected with a positive electrode BAT+ of a power supply module output end, the input end VIN is connected with a ground capacitor C401, a ground capacitor C402, a ground capacitor C403, a first pin of the chip U401, a fifth pin of the MOS tube Q401, a sixth pin, a seventh pin, an eighth pin of the MOS tube Q401, and a third pin of the chip U402 respectively, the third pin of the chip U401 is connected with one end of a resistor R401, the fourth pin of the chip U401 is connected with a first pin, a sixth pin of the SW401, and one end of a resistor R402 respectively, the fifth pin of the chip U401 is connected with a ground capacitor C404, the sixth pin, the eighth pin, the fourteenth pin, the seventeenth pin, and the twenty-first pin of the chip U401 are grounded, the ninth pin of the chip U401 is connected with a test point TP401, an input end of a diode D404, and an input end of a diode D405 respectively, the tenth pin of the chip U401 is connected with one end of an inductor L401, one end of a resistor R405, a positive electrode of a polar capacitor C408, a ground capacitor C409, a ground capacitor C410, a ground capacitor C411, one end of a resistor R408, a fourth pin of a chip U404, and a final output end VO4 respectively, the eleventh pin of the chip U401 is connected with one end of a resistor R403,The thirteenth pin of the chip U401, the other end of the resistor R404, the other end of the resistor R407 and the negative pole of the polar capacitor C408 are grounded, the fifteenth pin of the chip U401 is connected with the fourth pin of the MOS Q402, the sixteenth pin of the chip U401 is connected with the input end of the diode D401, the eighteenth pin of the chip U401 is respectively connected with the output end of the diode D401 and one end of the capacitor C407, the nineteenth pin of the chip U401 is connected with the fourth pin of the MOS Q401, the twentieth pin of the chip U401 is connected with the other end of the capacitor C407, the first pin, the second pin and the third pin of the MOS Q401 are respectively connected with the fifth pin, the sixth pin, the seventh pin, the eighth pin of the MOS Q402 and the other end of the inductor L401, the first pin, the second pin and the third pin of the MOS Q402 are respectively connected with the twelfth pin of the chip U401 and one end of the resistor R404, the other end of the resistor R405 is connected with the other end of the resistor R406, the other end of the resistor R408 is respectively connected with the fifth pin of the chip U404 and the main circuit output end VOUT4, the first pin of the chip U402 is grounded, the second pin of the chip U402 is respectively connected with the fourth pin of the chip U402, the grounded capacitor C413, the grounded capacitor C414, the second pin and the fifth pin of the SW401, the first pin and the sixth pin of the SW401 are respectively connected with the positive pole of the light emitting diode LED402 and the third pin of the chip U404, the negative pole of the light emitting diode LED402 is connected with the grounded resistor R416, the first pin and the second pin of the chip U404 are grounded, the sixth pin of the chip U404 is connected with the other end of the resistor R419, the other end of the diode D404 is respectively connected with the first pin of the chip U406.1, the test point TP406, one end of the capacitor C420 and one end of the resistor R421, the other end of the resistor R421 is connected with one end of the capacitor C418, the other end of the capacitor C418 is respectively connected with the other end of the capacitor C420, one end of the resistor R417 and the second pin of the chip U406.1, the third pin of the chip U406.1 is connected with one end of the resistor R418, the eighth pin of the chip U406.1 is respectively connected with the first pin, the sixth pin of the SW401 and the grounded capacitor C421, the fourth pin of the chip U406.1 is grounded, the other end of the resistor R418 is connected with the first pin of the chip U403, the output end of the diode D405 is respectively connected with one end of the resistor R422, one end of the capacitor C422, the seventh pin of the chip U406.2 and the test point TP407, the other end of the resistor R422 is connected with one end of the capacitor C419, the other end of the capacitor C419 is respectively connected with the other end of the capacitor C422, the sixth pin of the chip U406.2 and one end of the resistor R419, the fifth pin of the chip U406.2 is connected with one end of the resistor R420, the other end of the resistor R420 is connected with the second pin of the chip U403,The third pin of the chip U403 is grounded, the tenth pin of the chip U403 is connected with the grounding capacitor C415, the fourth pin of the chip U403 is connected with the fifteenth pin of the chip U405, the fifth pin of the chip U403 is connected with the fourteenth pin of the chip U405, the sixth pin of the chip U403 is connected with the twelfth pin of the chip U405, the seventh pin of the chip U403 is connected with the sixteenth pin of the chip U405, the eighth pin of the chip U403 is connected with the thirteenth pin of the chip U405, the ninth pin of the chip U403 is connected with the first pin, the sixth pin of the SW401 and the grounding capacitor C412 respectively, the fourth pin of the chip U405 is connected with the grounding capacitor C416, the sixth pin and the seventh pin of the chip U405 are connected with the grounding capacitor C417, one end of the resistor R414, the output end of the diode D402 and the output end of the diode D403 respectively, the eighth pin of the chip U405 is grounded, the ninth pin of the chip U405 is connected with one end of the resistor R412 and the second pin of the wiring terminal H401 respectively, the tenth pin of the chip U405 is connected with one end of the resistor R411 and the first pin of the wiring terminal H401 respectively, the third pin of the wiring terminal H401 is grounded, the eleventh pin of the chip U405 is connected with the other end of the resistor R414 and one end of the resistor R415, the other end of the resistor R411 is connected with the A6 pin and the B6 pin of the intermediate node USB401, the other end of the resistor R412 is connected with the A7 pin and the B7 pin of the intermediate node USB401, the other end of the resistor R416 is connected with the grounding switch SW402, the A1 pin, the A12 pin, the B1 pin, the B12 pin, the first pin, the second pin, the third pin and the fourth pin of the intermediate node USB401 are grounded, the A4 pin, the A9 pin, the B4 pin and the B9 pin of the intermediate node USB401 are connected with the positive electrode of the light emitting diode LED401 and the input end of the diode D403 respectively, the input end of the diode D402 is connected with the first pin and the sixth pin of the SW401, the negative electrode of the light emitting diode LED401 is connected with the grounding resistor R410, the A5 pin of the intermediate node USB401 is connected with the grounding resistor R409, the B5 pin of the intermediate node USB401 is connected with the grounding resistor R413, and the final output end VO4 is connected with the negative electrode GND of the output end of the power supply module.

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