Multi-output circuit for ATX power supply

By designing multiple output circuits for ATX power supplies, including voltage checking and conversion modules, the problems of large quality inspection errors, easy damage to the PS_ON signal, and limited voltage types in ATX power supplies have been solved. This has achieved the effects of simplified quality inspection, multiple voltage outputs, and reduced costs.

CN223693832UActive Publication Date: 2025-12-19BEIJING BOCHUANG HUISHENG TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202422996698.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-12-19
Estimated Expiration
2034-12-05

AI Technical Summary

Technical Problem

Existing ATX power supply quality inspection methods have large errors and are cumbersome to operate. Pulling the PS_ON signal low to power on can easily damage the power supply. The output voltage options are limited and require an external adjustable power supply, which is costly.

Method used

Design a multi-output circuit including a power supply unit, a conversion unit, and an output unit. Voltage detection and conversion are achieved through a voltage detection module and a voltage conversion module. A soft-start module is used to protect the power supply. The PS_ON signal is connected to the ATX power supply through a switch, which simplifies quality inspection and expands the voltage output range.

Benefits of technology

It achieves accurate and rapid voltage detection and multiple voltage outputs, simplifies the quality inspection process, protects the power supply, and reduces costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a multi-output circuit for an ATX power supply. The multi-output circuit comprises a power supply unit, a conversion unit and an output unit which are connected in sequence, the conversion unit comprises a plurality of voltage checking modules and a plurality of voltage conversion modules, various voltages output by the power supply unit are respectively measured through the plurality of voltage checking modules, and measurement results are output to the output unit to be displayed; the voltage output by the power supply unit is converted into a plurality of voltage values through the plurality of voltage conversion modules, and the plurality of voltage values are output to the output unit. The output circuit comprises a power supply unit, a conversion unit and an output unit, the power supply unit is connected with the conversion unit, the conversion unit is connected with the output unit, voltage output by the power supply unit is detected and converted into various voltage values, then the various voltage values are output to an interface module and displayed according to a voltage detection result, quality inspection of the ATX power supply is ensured to be qualified, and the ATX power supply is ensured to be safe and reliable. Operation is simple and fast, detection results are accurate, and detection efficiency is high.
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Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ATX power supply, and relates to the circuit of ATX power supply, especially a variety of output circuits for ATX power supply. BACKGROUND

[0002] ATX power supply is a kind of standardized power supply designed by ATX (Advanced Technology eXtended) specification, and is used to provide DC power for computer, and is widely used in modern computer and server and other high-performance computing devices due to higher power output, higher efficiency and more intelligent control function, but there are still the following problems in the use of ATX power supply:

[0003] 1, the quality inspection of ATX power supply generally uses the multimeter point to measure the output voltage of each way, to ensure that the output voltage is within the error range, the operation error of this mode is big, the detection result is not accurate, and the test operation is complicated and complex, and the efficiency is low;

[0004] 2, ATX power supply needs to be pulled down by PSON signal to start electricity, usually uses wire short circuit to ground signal to realize, and it is easy to damage the power supply;

[0005] 3, the voltage value of ATX power supply output is less, and the required DC power supply voltage is obtained by external AC-DC adjustable power supply, and the cost is higher.

[0006] Therefore, we propose a variety of output circuits for ATX power supply to solve the above problems. INVENTION CONTENTS

[0007] The utility model aims at overcoming the defects of prior art, and provides a variety of output circuits for ATX power supply, which has simple structure and multiple outputs.

[0008] To solve the above problems, the technical scheme of the utility model is as follows:

[0009] A variety of output circuits for ATX power supply, comprising power supply unit, conversion unit and output unit connected in sequence;

[0010] The conversion unit comprises a plurality of voltage check modules and a plurality of voltage conversion modules, and the plurality of voltages output by the power supply unit are measured by the plurality of voltage check modules respectively, and the measurement results are output to the output unit for display;The voltage output by the power supply unit is converted into a plurality of voltage values by the plurality of voltage conversion modules, and the plurality of voltage values are output to the output unit.

[0011] In a further embodiment, the power supply unit comprises an ATX power supply, a power supply start switch and a plurality of soft start modules, the ATX power supply is connected to the power supply start switch and the plurality of soft start modules respectively, and the voltage output by the ATX power supply is gradually increased to protect the circuit components.

[0012] In a further embodiment, the output unit comprises a plurality of display modules and a plurality of interface modules, the voltage inspection module is connected to the display modules, and the voltage conversion module is connected to the interface modules.

[0013] In a further embodiment, the soft start module comprises a MOS tube Q4, a MOS tube Q6, a capacitor C1, a capacitor C2 and a capacitor C3, the gate of the MOS tube Q4 is connected to the ATX power supply through a resistor R3, the gate of the MOS tube Q4 is also connected to one end of the capacitor C1 and one end of a resistor R4 respectively, the source of the MOS tube Q4, the other end of the capacitor C1 and the other end of the resistor R4 are all grounded, the drain of the MOS tube Q4 is connected to the gate of the MOS tube Q6 through a resistor R2, the gate of the MOS tube Q6 is also connected to the ATX power supply through a resistor R1, the source of the MOS tube Q6 is connected to the ATX power supply, the drain of the MOS tube Q6 is connected to the voltage inspection module and the voltage conversion module, the source of the MOS tube Q6 is also grounded through the capacitor C2, and the drain of the MOS tube Q6 is also grounded through the capacitor C3.

[0014] In a further embodiment, the voltage inspection module comprises an AND gate U3A, the 1st pin and the 2nd pin of the AND gate U3A are connected to an upper limit circuit and a lower limit circuit respectively, the 3rd pin of the AND gate U3A is grounded in sequence through a light emitting diode D1 and a resistor R25, the upper limit circuit and the lower limit circuit are connected to the ATX power supply and converted, the AND gate U3A judges the voltage converted by the upper limit circuit and the lower limit circuit, and outputs the judgment result to the light emitting diode D1 for display.

[0015] In a further embodiment, the upper limit circuit comprises an operational amplifier U1A, the 2nd pin of the operational amplifier U1A is connected to the soft start module through a resistor R15, and the 2nd pin is also grounded through a resistor R16; the 3rd pin of the operational amplifier U1A is grounded in sequence through a resistor R17 and a resistor R14, and the 3rd pin is also connected to a standard voltage in sequence through a resistor R13 and a resistor R24; the 8th pin of the operational amplifier U1A is connected to the standard voltage, the 4th pin of the operational amplifier U1A is grounded; and the 1st pin of the operational amplifier U1A is connected to the AND gate.

[0016] In further embodiments, the lower limit circuit comprises an operational amplifier U1B, the pin 5 of the operational amplifier U1B is connected to the soft start module through a resistor R18, and the pin 5 is also grounded through a resistor R19; the pin 6 of the operational amplifier U1B is grounded in sequence through a resistor R22 and a resistor R23, and the pin 6 is also connected to a standard voltage in sequence through a resistor R21 and a resistor R20; the pin 5 of the operational amplifier U1B is connected to the standard voltage, the pin 4 of the operational amplifier U1B is grounded, and the pin 7 of the operational amplifier U1B is connected to an AND gate.

[0017] In further embodiments, the voltage conversion module comprises a DC power conversion chip, the first pin of the DC power conversion chip is connected to the interface module through an inductor L1, the inductor L1 is grounded through a capacitor C14 and a capacitor C15 respectively; the second pin of the DC power conversion chip is connected to the inductor L1 through a capacitor C12, the third pin of the DC power conversion chip is connected to the soft start module through a resistor R58, and the third pin is also grounded through a capacitor C16; the fourth pin of the DC power conversion chip is grounded, the fifth pin of the DC power conversion chip is connected to the interface module through a resistor R57, and the fifth pin is also grounded through a resistor R56; the sixth pin of the DC power conversion chip is grounded in sequence through a capacitor C13 and a resistor R54, the seventh pin of the DC power conversion chip is grounded through a resistor R55, and the eighth pin of the DC power conversion chip is grounded through a capacitor C10 and a capacitor C11 respectively.

[0018] In further embodiments, the voltage conversion module further comprises MOS tubes Q11, Q12 and a resistor R64, the gate of the MOS tube Q11 is connected to the ATX power supply, the source of the MOS tube Q11 is grounded, and the drain of the MOS tube Q11 is connected to a standard voltage through the resistor R64; the drain of the MOS tube Q11 is also connected to the gate of the MOS tube Q12, the source of the MOS tube Q12 is grounded, and the drain of the MOS tube Q12 is connected to the DC power conversion chip.

[0019] In further embodiments, the power start switch is connected to the ATX power supply through a switch SW1; the switch SW1 has three pins, the first pin of the switch SW1 is connected to the power start switch, the second pin of the switch SW1 is connected to the PS_ON signal, and the third pin of the switch SW1 is grounded.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] 1、 the output circuit comprises a power supply unit, a conversion unit and an output unit, the power supply unit is connected to the conversion unit, the conversion unit is connected to the output unit, the voltage output by the power supply unit is detected and converted into multiple voltage values, the multiple voltage values are output to the interface module, and the voltage detection result is displayed, so that the qualified ATX power supply is ensured, the operation is simple and fast, the detection result is accurate, and the detection efficiency is high.

[0022] 2, The output circuit of PS_ON signal and ATX power supply between the connection switch SW1, switch SW1 three pins of two respectively connected PS_ON signal, ATX power supply, the last pin is connected to ground, can quickly and easily switch ATX power supply; ATX power supply is also connected to several soft start module, soft start module includes several capacitors and MOS tube, can slowly pull high level when ATX power supply is on, avoid the instantaneous surge current formed when there is a load at the back end, protect ATX power supply.

[0023] 3, The output circuit of ATX power supply is connected to several voltage conversion module, can convert the voltage output by ATX power supply into a variety of different voltage values, expand the voltage range of ATX power supply output, suitable for a variety of different specifications of computer, and no need for external AC to DC adjustable power supply, greatly reduce the cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 For a variety of output circuit structure diagram of ATX power supply;

[0025] Figure 2 For a variety of output circuit structure diagram of ATX power supply

[0026] Figure 3 For a variety of output circuit ATX power supply interface circuit diagram of ATX power supply;

[0027] Figure 4 For a variety of output circuit power supply start switch circuit diagram of ATX power supply;

[0028] Figure 5 For a variety of output circuit soft start module circuit diagram of ATX power supply;

[0029] Figure 6 For a variety of output circuit voltage check module circuit diagram of ATX power supply;

[0030] Figure 7 For a variety of output circuit voltage conversion module circuit diagram of ATX power supply;

[0031] Figure 8 For a variety of output circuit voltage conversion module circuit diagram of ATX power supply

[0032] Figure 9 For a variety of output circuit voltage conversion module circuit diagram of ATX power supply

[0033] In the figure: 1, power supply unit; 11, ATX power supply; 12, power supply start switch; 13, soft start module; 2, conversion unit; 21, voltage conversion module; 22, voltage inspection module; 3, output unit; 31, display module; 32, interface module. DETAILED DESCRIPTION

[0034] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0035] Example 1:

[0036] A kind of multiple output circuit for ATX power supply, as Figures 1 to 9 Shown, including power supply unit 1, conversion unit 2 and output unit 3, power supply unit 1 connects conversion unit 2, conversion unit 2 connects output unit 3, the voltage output by power supply unit 1 is detected and converted into multiple voltage values, then multiple voltage values are output to output unit 3, and according to voltage detection result, display is carried out, to ensure that ATX power supply 11 is qualified for quality inspection;Power supply unit 1 includes ATX power supply 11, power supply start switch 12 and soft start module 13, ATX power supply 11 is connected with power supply start switch 12 and soft start module 13 respectively;Conversion unit 2 includes voltage conversion module 21 and voltage inspection module 22, soft start module 13 is connected with voltage conversion module 21 and voltage inspection module 22 respectively;Output unit 3 includes display module 31 and interface module 32, voltage inspection module 22 is connected with display module 31, and voltage conversion module 21 is connected with interface module 32.

[0037] As Figures 1 to 4 Shown, ATX power supply 11 is connected with power supply start switch 12, and the start of ATX power supply 11 is controlled by power supply start switch 12, ATX power supply 11 is connected with soft start module 13, and the output voltage of ATX power supply 11 can be slowly pulled up from zero to full conduction, to avoid the instantaneous inrush current formed when there is a load at the back end, and to protect ATX power supply 11; Figure 3This diagram shows the connection of the 24-pin input interface of the ATX power supply 11. Pins 1, 2, 12, and 13 output voltage VCC_3.3V; pins 3, 5, 7, 15, 17, 18, 19, and 24 are grounded; pins 4, 6, 21, 22, and 23 output voltage VCC_5V; pin 8 outputs the signal PWR_OK; pin 9 connects to the external standard voltage VCC_5VSB; pins 10 and 11 output voltage VCC_12V; pin 1... The output voltage of pin 4 is VCC_N 12V. Pin 16 of the interface terminal is connected to the PS_ON signal, and pin 20 of the interface terminal outputs VCC_N 5V. A switch SW1 connects the power start switch 12 and the ATX power supply 11. Switch SW1 has three pins: pin 1 is connected to the electrical signal SW1_NC, pin 2 is connected to the PS_ON signal, and pin 3 is grounded. When switch SW1 is switched to the pin 3 position, pins 2 and 3 are connected, the PS_ON signal is grounded, and the ATX power supply 11 is started. Preferably, switch SW1 is model MSK12C02-HB.

[0038] like Figure 5The soft start module 13 is shown, the voltage PWR_OK is connected with the resistance R3, the resistance R3 is connected with one end of the resistance R4, one end of the capacitor C1 and the gate of the MOS tube Q4 respectively, the other end of the resistance R4, the other end of the capacitor C1 and the source of the MOS tube Q4 are all connected with the ground, one end of the resistance R2 is connected with the drain of the MOS tube Q4, the other end of the resistance R2 is connected with one end of the resistance R1 and the gate of the MOS tube Q6 respectively, the other end of the resistance R1 and the source of the MOS tube Q6 are all connected with the voltage VCC_5V, the voltage VCC_5V is also connected with the positive electrode of the capacitor C2, the negative electrode of the capacitor C2 is connected with the ground, the drain of the MOS tube Q6 is connected with the voltage VCC_5V_A, the voltage VCC_5V_A is also connected with one end of the capacitor C3, the other end of the capacitor C3 is connected with the ground; when the power supply is stable, the electrical signal PWR_OK will pull high level, the resistance R3, the resistance R4, the capacitor C1 and the MOS tube Q4 form a soft start circuit, when PWR_OK pulls high level, the MOS tube Q4 slowly opens, at the same time, the voltage of the resistance R1 and the resistance R2 is slowly pulled up, the MOS tube Q6 slowly opens until completely conducts, and the voltage VCC_5V is conducted to VCC_5V_A. Preferably, the capacitor C2 is a polarized capacitor, such as an electrolytic capacitor, etc., the capacitor C1 and the capacitor C3 are all non-polar capacitors; taking 5V voltage as an example, the resistance value of the resistance R1 is 1.8k, the resistance value of the resistance R2 is 8.2k, the resistance value of the resistance R3 and the resistance R4 is 10k, the capacitance of the capacitor C1 is 1μF, the capacitance of the capacitor C2 is 10μF, the capacitance of the capacitor C3 is 0.1μF, the values of other voltage elements are adjusted accordingly; the model of the MOS tube Q4 is 2N7002 / SOT, and the model of the MOS tube Q6 is AP6NA3R2.

[0039] As Figure 6The voltage check module 22 shown, the voltage check module 22 includes and gate U3A, the two input terminals of and gate U3A are connected with upper limit circuit and lower limit circuit respectively; the upper limit circuit includes operational amplifier U1A, the 2 feet of operational amplifier U1A are connected with the one end of resistance R15, the one end of resistance R16, the other end of resistance R15 is connected with voltage VCC_5V_A, and the other end of resistance R16 is grounded; the 3 feet of operational amplifier U1A is connected with the one end of resistance R17, the other end of resistance R17 is connected with the one end of resistance R14, the other end of resistance R14 is grounded, and the 3 feet of operational amplifier U1A is also connected with the one end of resistance R13, the other end of resistance R13 is connected with the one end of resistance R24, and the other end of resistance R24 is connected to external standard voltage VCC_5VSB; the 8 feet of operational amplifier U1A is connected to external standard voltage VCC_5VSB, the 4 feet of operational amplifier U1A is grounded, and the 1 foot of operational amplifier U1A is connected to the 1 foot of and gate U3A; the lower limit circuit includes operational amplifier U1B, the 5 feet of operational amplifier U1B are connected with the one end of resistance R18, the one end of resistance R19 respectively, and the other end of resistance R18 is connected to voltage VCC_5V_A, and the other end of resistance R19 is grounded; the 6 feet of operational amplifier U1B is connected with the one end of resistance R21, the other end of resistance R21 is connected with the one end of resistance R20, and the other end of resistance R20 is connected to external standard voltage VCC_5VSB, and the 6 feet of operational amplifier U1B is also connected with the one end of resistance R22, the other end of resistance R22 is connected with the one end of resistance R23, and the other end of resistance R23 is grounded; the 4 feet of operational amplifier U1B is grounded, the 8 feet of operational amplifier U1B is connected to external standard voltage VCC_5VSB, and the 7 feet of operational amplifier U1B is connected to the 2 feet of and gate U3A, and the 3 feet of and gate U3A is connected with display module 31, and display module 31 includes light emitting diode D1, one end of light emitting diode D1, the other end of light emitting diode D1 is connected with the one end of resistance R25, the other end of resistance R25 is grounded, and light emitting diode D1 adopts LED indicator; taking 5V voltage as an example, the standard range of voltage is 5V±5%, operational amplifier U1A and operational amplifier U1B are powered by external standard voltage VCC_5VSB, the 3 feet of operational amplifier U1A is divided by resistance R13, resistance R14, resistance R17 and resistance R24 to obtain reference voltage 2.625V, which is the upper limit voltage 5.25V, the voltage outputted by the soft start module 13, i.e. the voltage VCC_5V_A, is halved by the resistor R15 and the resistor R16, and the voltage at the 2nd pin and the 3rd pin of the operational amplifier U1A is compared, if the voltage at the 3rd pin is higher than the voltage at the 2nd pin and within the range of 5V+5%, the 1st pin of the operational amplifier U1A outputs high level, otherwise, if the voltage at the 3rd pin is lower than the voltage at the 2nd pin, the 1st pin of the operational amplifier U1A outputs low level; similarly, the reference voltage 2.375V is obtained by the resistor R20, the resistor R21, the resistor R22 and the resistor R23, which is exactly half of the lower limit voltage 4.75V, and the voltage VCC_5V_A to be detected is halved by the resistor R18 and the resistor R19, if the voltage at the 6th pin of the operational amplifier U1B is lower than the voltage at the 5th pin, the 7th pin of the operational amplifier U1B outputs high level, otherwise, if the voltage at the 6th pin of the operational amplifier U1B is higher than the voltage at the 5th pin, the 7th pin of the operational amplifier U1B outputs low level; if the detection is qualified, the 1st pin and the 7th pin of the operational amplifier U1A are both high level, i.e. the 1st pin and the 2nd pin of the AND gate U3A are both high level, and the 3rd pin of the AND gate U3A outputs high level through the operation of the AND gate U3A, and the light emitting diode D1 is turned on and emits light, if the detection is qualified, the 3rd pin of the AND gate U3A outputs low level, and the light emitting diode D1 is not turned on and does not emit light, if the detection is unqualified, the voltage checking module 22 has the same structure and principle, preferably, taking 5V as an example, the resistance value of the resistor R14 is 5.1K 1%, the resistance value of the resistor R17 is 150K 1%, the resistance value of the resistor R13 is 50K 1%, the resistance value of the resistor R24 is 4.7K 1%, the resistance value of the resistor R15 is 10K 1%, the resistance value of the resistor R16 is 10K 1%, the resistance value of the resistor R19 is 10K 1%, the resistance value of the resistor R18 is 10K 1%, the resistance value of the resistor R20 is 5.1K 1%, the resistance value of the resistor R21 is 150K 1%, the resistance value of the resistor R23 is 50K 1%, the resistance value of the resistor R22 is 4.7K 1%, the resistance value of the resistor R25 is 100K, the model of the operational amplifier U1A and the operational amplifier U1B is LM158, and the model of the AND gate U3A is 74HC08.

[0040] As Figure 7The voltage conversion module 21 shown, including a DC power conversion chip U8, the 1 pin of the DC power conversion chip U8 is connected to one end of the inductor L1, the other end of the inductor L1 outputs the voltage VCC_2.5V_OUT, and the other end of the inductor L1 is also connected to the ground through the capacitor C14 and the capacitor C15 respectively; the 2 pin of the DC power conversion chip U8 is connected to the inductor L1 through the capacitor C12, the 3 pin of the DC power conversion chip U8 outputs the electrical signal EN_2.5V, the 3 pin of the DC power conversion chip U8 is connected to the voltage VCC_5V_A through the resistor R58, and the 3 pin of the DC power conversion chip U8 is also connected to the ground through the capacitor C16; the 4 pin of the DC power conversion chip U8 is connected to the ground, the 5 pin of the DC power conversion chip U8 is connected to the output voltage VCC_2.5V_OUT through the resistor R57, and the 5 pin of the DC power conversion chip U8 is also connected to the ground through the resistor R56; the 6 pin of the DC power conversion chip U8 is connected to the ground through the capacitor C13 and the resistor R54 in turn, the 7 pin of the DC power conversion chip U8 is connected to the ground through the resistor R55, the 8 pin of the DC power conversion chip U8 is connected to the voltage VCC_5V_A, and the 8 pin of the DC power conversion chip U8 is also connected to the ground through the capacitor C10 and the capacitor C11 respectively; the voltage conversion module 21 further includes a switch SW2, the switch SW2 is provided with three pins, the 1 pin of the switch SW2 is connected to the conversion signal SW2_NC, the 2 pin of the switch SW2 is connected to the electrical signal EN_2.5V, and the 3 pin of the switch SW2 is connected to the ground; when the 1 pin and the 2 pin of the switch SW2 are connected, the DC power conversion chip U8 is started, and when the 2 pin and the 3 pin of the switch SW2 are connected, the DC power conversion chip U8 is turned off; the DC power conversion chip U8 inputs the voltage VCC_5V_A from the 8 pin, the MOS tube inside the DC power conversion chip U8 is connected with the external resistor L1, the capacitor C14 and the capacitor C15 to form a charging and discharging path, and finally a 2.5V DC voltage is converted and output; the 3 pin of the DC power conversion chip U8 is high when the chip is started, and the 3 pin is low when the chip is turned off, and the switch SW2 can manually control the start or turn off of the DC power conversion chip U8.Preferably, the model of the direct current power conversion chip U8 is RT7272B, and the model of the switch SW2 is MSK12C02-HB; taking 5V voltage conversion to 2.5V voltage as an example, the inductance of the inductor L1 is 3.6μH, the capacitance of the capacitor C10 is 10μF, the capacitance of the capacitor C11 is 10μF, the capacitance of the capacitor C12 is 100nF, the capacitance of the capacitor C13 is 2.7nF, the capacitance of the capacitor C14 is 22μF, the capacitance of the capacitor C15 is 22μF, the capacitance of the capacitor C16 is 0.1μF, the resistance of the resistor R54 is 12K, the resistance of the resistor R55 is 137k, the resistance of the resistor R56 is 12K 1%, the resistance of the resistor R57 is 25.5K 1%, and the resistance of the resistor R58 is 10k; the capacitors C10, C11, C14 and C15 are polar capacitors, and the capacitors C12, C13 and C16 are non-polar capacitors.

[0041] As shown in Figure 8 The voltage conversion module 21 further includes a MOS tube Q11 and a MOS tube Q12, the gate of the MOS tube Q11 is connected with the signal PWR_OK, the source of the MOS tube Q11 is grounded, the drain of the MOS tube Q11 is connected with an external standard voltage VCC_5VSB through a resistor R64, the drain of the MOS tube Q11 is further connected with the gate of the MOS tube Q12, the source of the MOS tube Q12 is grounded, and the drain of the MOS tube Q12 is connected with the signal EN_2.5V; another condition for starting the chip is that the ATX power supply 11 has been normally started, that is, the signal PWR_OK is at high level; when the signal PWR_OK is at low level, the signal PWR_OK is pulled low through the MOS tube Q11 and the MOS tube Q12, and the signal EN_2.5V is closed, thereby shutting down the direct current power conversion chip U8. Preferably, the model of the MOS tube Q11 is 2N7002 / SOT, the model of the MOS tube Q12 is 2N7002 / SOT, and the resistance of the resistor R64 is 10K.

[0042] As shown in Figure 9 The interface module 32 includes an output interface J2 of the power supply, the 1 pin of the output interface J2 is connected with the converted voltage VCC_2.5C_OUT, and the 2 pin of the output interface J2 is grounded. Preferably, the model of the output interface J2 is HC-2P.

[0043] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-output circuit for an ATX power supply, characterized in that, The power supply unit, the conversion unit and the output unit are connected in sequence. The conversion unit includes voltage inspection modules and voltage conversion modules. The multiple voltages output by the power supply unit are measured by the voltage inspection modules and output to the output unit for display. The voltage output by the power supply unit is converted into multiple voltage values by the voltage conversion modules and output to the output unit.

2. The multiple output circuit for an ATX power supply of claim 1, wherein, The power supply unit includes an ATX power supply, a power supply start switch and soft start modules. The ATX power supply is connected to the power supply start switch and the soft start modules to gradually increase the voltage output by the ATX power supply, thereby protecting circuit elements.

3. The multiple output circuit for an ATX power supply of claim 2, wherein, The output unit includes display modules and interface modules. The voltage inspection modules are connected to the display modules, and the voltage conversion modules are connected to the interface modules.

4. The multiple output circuit for an ATX power supply of claim 3, wherein, The soft start module includes MOS tubes (Q4) and (Q6), capacitors (C1), (C2) and (C3). The gate of the MOS tube (Q4) is connected to the ATX power supply through a resistor (R3). The gate of the MOS tube (Q4) is also connected to one end of the capacitor (C1) and one end of a resistor (R4). The source of the MOS tube (Q4), the other end of the capacitor (C1) and the other end of the resistor (R4) are grounded. The drain of the MOS tube (Q4) is connected to the gate of the MOS tube (Q6) through a resistor (R2). The gate of the MOS tube (Q6) is also connected to the ATX power supply through a resistor (R1). The source of the MOS tube (Q6) is connected to the ATX power supply. The drain of the MOS tube (Q6) is connected to the voltage inspection modules and the voltage conversion modules. The source of the MOS tube (Q6) is also grounded through the capacitor (C2). The drain of the MOS tube (Q6) is also grounded through the capacitor (C3).

5. The multiple output circuit for an ATX power supply of claim 4, wherein, The voltage inspection module includes an AND gate (U3A). The 1st pin and the 2nd pin of the AND gate (U3A) are connected to upper limit circuit and lower limit circuit, respectively. The 3rd pin of the AND gate (U3A) is grounded in sequence through a light emitting diode (D1) and a resistor (R25). The upper limit circuit and the lower limit circuit are connected to the ATX power supply and converted. The AND gate (U3A) judges the voltage converted by the upper limit circuit and the lower limit circuit and outputs the judgment result to the light emitting diode (D1) for display.

6. The multiple output circuit for an ATX power supply of claim 5, wherein, The upper limit circuit includes an operational amplifier (U1A), the pin 2 of the operational amplifier (U1A) is connected to the soft start module through the resistance (R15), and the pin 2 is also grounded through the resistance (R16); the pin 3 of the operational amplifier (U1A) is grounded in sequence through the resistance (R17) and the resistance (R14), and the pin 3 is also connected to the standard voltage in sequence through the resistance (R13) and the resistance (R24); the pin 8 of the operational amplifier (U1A) is connected to the standard voltage, and the pin 4 of the operational amplifier (U1A) is grounded; the pin 1 of the operational amplifier (U1A) is connected to the AND gate (U3A).

7. The multiple output circuit for an ATX power supply of claim 6, wherein, The lower limit circuit includes an operational amplifier (U1B), the pin 5 of the operational amplifier (U1B) is connected to the soft start module through the resistance (R18), and the pin 5 is also grounded through the resistance (R19); the pin 6 of the operational amplifier (U1B) is grounded in sequence through the resistance (R22) and the resistance (R23), and the pin 6 is also connected to the standard voltage in sequence through the resistance (R21) and the resistance (R20); the pin 5 of the operational amplifier (U1B) is connected to the standard voltage, and the pin 4 of the operational amplifier (U1B) is grounded; the pin 7 of the operational amplifier (U1B) is connected to the AND gate (U3A).

8. The multiple output circuit for an ATX power supply of claim 7, wherein, The voltage conversion module includes a DC power conversion chip, the first pin of the DC power conversion chip is connected to the interface module through the inductor (L1), and the inductor (L1) is grounded through the capacitor (C14) and the capacitor (C15) respectively; the second pin of the DC power conversion chip is connected to the inductor (L1) through the capacitor (C12), the third pin of the DC power conversion chip is connected to the soft start module through the resistance (R58), and the third pin is also grounded through the capacitor (C16); the fourth pin of the DC power conversion chip is grounded, the fifth pin of the DC power conversion chip is connected to the interface module through the resistance (R57), and the fifth pin is also grounded through the resistance (R56); the sixth pin of the DC power conversion chip is grounded in sequence through the capacitor (C13) and the resistance (R54), the seventh pin of the DC power conversion chip is grounded through the resistance (R55), and the eighth pin of the DC power conversion chip is grounded through the capacitor (C10) and the capacitor (C11) respectively.

9. The multiple output circuit for an ATX power supply of claim 8, wherein, The voltage conversion module further includes MOS tube (Q11), MOS tube (Q12) and resistance (R64), the gate of the MOS tube (Q11) is connected to the ATX power supply, the source of the MOS tube (Q11) is grounded, and the drain of the MOS tube (Q11) is connected to the standard voltage through the resistance (R64); the drain of the MOS tube (Q11) is also connected to the gate of the MOS tube (Q12), the source of the MOS tube (Q12) is grounded, and the drain of the MOS tube (Q12) is connected to the DC power conversion chip.

10. The multiple output circuit for an ATX power supply of claim 9, wherein, The power-on switch is connected with the ATX power supply through a switch (SW1); the switch (SW1) is provided with three pins, a first pin of the switch (SW1) is connected with the power-on switch, a second pin of the switch (SW1) is connected with a PS_ON signal, and a third pin of the switch (SW1) is grounded.