Single-chip sink circuit with voltage and current power indication function

Abstract

The utility model relates to a single-chip sink circuit with a voltage current power indication function, which comprises a master control MCU, a power supply circuit, an indication circuit and a detection resistor, the input end of the master control MCU is connected with a TypeC chip, the power supply circuit is connected with the master control MCU, the indication circuit is connected with the master control MCU, the output end of the master control MCU is connected with an output socket, and the detection resistor is connected with the output socket. The detection resistor is arranged between the TypeC chip and the output socket and is connected with the main control MCU, a pin 19 of the main control MCU is connected with one end of the resistor R11, the other end of the resistor R11 is connected with a pin A5 of the TypeC chip, a pin 18 of the main control MCU is connected with one end of the resistor R12, and the other end of the resistor R12 is connected with the other end of the resistor R11. The circuit is controlled by a single chip, the size of the adapter is reduced, the adapter is more convenient to carry, the voltage of equipment is guided to the detection resistor through the PD sink chip, and the accuracy of a detection result is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to equipment charging technical field especially, it relates to a single chip sink circuit with voltage current power indication function. BACKGROUND

[0002] Due to the different regions or the interface of equipment, some equipment needs to be connected through the adapter when charging. The existing adapter circuit usually needs to use two or more chips to control, so that the adapter circuit is too complex, resulting in the volume of the adapter being too large, not easy to carry, and the detection of voltage and current needs to be guided through the power supply circuit, and the detection result is not accurate. SUMMARY

[0003] The utility model provides a single chip sink circuit with voltage current power indication function, it aims at solving the problem that the existing power detection circuit needs to use multi-chip control, resulting in the volume of the adapter being too large, and the detection result is accurate.

[0004] The utility model provides a single chip sink circuit with voltage current power indication function, including main control MCU, power supply circuit, indication circuit and detection resistance, the input of main control MCU is connected with TypeC chip, power supply circuit is connected with main control MCU, indication circuit is connected with main control MCU, the output of main control MCU is connected with output socket, detection resistance is arranged between TypeC chip and output socket and is connected with main control MCU, the 19 pin of main control MCU is connected with one end of resistance R11, the other end of resistance R11 is connected with A5 pin of TypeC chip, the 18 pin of main control MCU is connected with one end of resistance R12, the other end of resistance R12 is connected with the other end of resistance R11.

[0005] As a further improvement of the utility model, the A4, B4, A9 and B9 pins of the TypeC chip are connected to an external power supply VBUS, the 1 pin of the output socket is connected to an external power supply VBUS, the 0 pin of the TypeC chip is connected to one end of the detection resistance, and the other end of the detection resistance is connected to the 2 pin of the output socket.

[0006] As a further improvement of the utility model, the 3 pin of the main control MCU is connected to one end of the resistance R14, and the other end of the resistance R14 is connected to the B5 pin of the TypeC chip.

[0007] As a further improvement of the utility model, the power supply circuit includes power supply chip U1 and diode D1, the 3 pin of power supply chip U1 is connected with external power supply VBUS, the 2 pin of power supply chip U1 is connected with the anode of diode D1, the cathode of diode D1 is connected with the 6 pin of main control MCU, one end of capacitor C1 is connected with the 3 pin of power supply chip U1, one end of capacitor C2 is connected with the 2 pin of power supply chip U1, the VSS end of power supply chip, the other end of capacitor C1 and the other end of capacitor C2 are grounded.

[0008] As a further improvement of the utility model, one end of capacitor C3 is connected with the 6 pin of main control MCU, the other end of capacitor C3 is grounded.

[0009] As a further improvement of the utility model, the inverting input end of amplifier is connected with one end of detection resistance, the inverting input end of amplifier is grounded, the noninverting input end of amplifier is connected with one end of resistance R16, the other end of resistance R16 is connected with the other end of detection resistance, the output end of amplifier is output to the main control MCU, one end of capacitor C4 is connected with the noninverting input end of amplifier, the other end of capacitor C4 is grounded, one end of resistance R15 is connected with one end of resistance R16, the other end of resistance R15 is connected with 3.3V voltage.

[0010] As a further improvement of the utility model, the indication circuit includes display screen LED1, the 1 pin of display screen LED1 is connected with one end of resistance R1, the other end of resistance R1 is connected with the 1 pin of main control MCU, the 2 pin of display screen LED1 is connected with one end of resistance R2, the other end of resistance R2 is connected with the 4 pin of main control MCU, the 3 pin of display screen LED1 is connected with one end of resistance R3, the other end of resistance R3 is connected with the 9 pin of main control MCU, the 4 pin of display screen LED1 is connected with one end of resistance R4, the other end of resistance R4 is connected with the 10 pin of main control MCU, the 5 pin of display screen LED1 is connected with one end of resistance R5, the other end of resistance R5 is connected with the 12 pin of main control MCU, the 6 pin of display screen LED1 is connected with one end of resistance R6, the other end of resistance R6 is connected with the 20 pin of main control MCU.

[0011] As a further improvement of the utility model, the 16 pin of main control MCU is connected with one end of resistance R17, the other end of resistance R17 is grounded.

[0012] As a further improvement of the utility model, the 14 pin of main control MCU is connected with one end of resistance R18, the other end of resistance R18 is grounded.

[0013] As a further improvement of the utility model, the 13th pin of the main control MCU is connected with one end of the resistor R19, and the other end of the resistor R19 is grounded.

[0014] The utility model discloses the beneficial effect is: circuit adopts single-chip control, reduces the volume of adapter, and it is more convenient to carry, and through the PD sink chip, the voltage of equipment is guided to detection resistance, and the accuracy of detection result is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the circuit connection drawing of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the drawings and example, and the utility model is further detailed.

[0017] As Figure 1 The utility model discloses a single-chip sink circuit with voltage current power indication function, including main control MCU, power supply circuit, indication circuit and detection resistance, the input of main control MCU is connected with TypeC chip, power supply circuit is connected with main control MCU, indication circuit is connected with main control MCU, the output of main control MCU is connected with output socket, detection resistance sets up between TypeC chip and output socket and is connected with main control MCU, the 19th pin of main control MCU is connected with one end of resistance R11, and the other end of resistance R11 is connected with the A5 pin of TypeC chip, the 18th pin of main control MCU is connected with one end of resistance R12, and the other end of resistance R12 is connected with the other end of resistance R11.

[0018] As an embodiment of the utility model, the A4, B4, A9 and B9 pins of TypeC chip are connected with external power supply VBUS, the 1st pin of output socket is connected with external power supply VBUS, the 0th pin of TypeC chip is connected with one end of detection resistance, and the other end of detection resistance is connected with the 2nd pin of output socket.

[0019] As another embodiment of the utility model, the 3rd pin of main control MCU is connected with one end of resistance R14, and the other end of resistance R14 is connected with the B5 pin of TypeC chip.

[0020] As another embodiment of the utility model, the power supply circuit includes power supply chip U1 and diode D1, the 3 pin of power supply chip U1 is connected with external power supply VBUS, the 2 pin of power supply chip U1 is connected with the anode of diode D1, the cathode of diode D1 is connected with the 6 pin of main control MCU, one end of capacitor C1 is connected with the 3 pin of power supply chip U1, one end of capacitor C2 is connected with the 2 pin of power supply chip U1, the VSS end of power supply chip, the other end of capacitor C1 and the other end of capacitor C2 are grounded.

[0021] As another embodiment of the utility model, one end of capacitor C3 is connected with the 6 pin of main control MCU, the other end of capacitor C3 is grounded.

[0022] As another embodiment of the utility model, the inverting input end of amplifier is connected with one end of detection resistance, the inverting input end of amplifier is grounded, the noninverting input end of amplifier is connected with one end of resistance R16, the other end of resistance R16 is connected with the other end of detection resistance, the output end of amplifier is output to the main control MCU, one end of capacitor C4 is connected with the noninverting input end of amplifier, the other end of capacitor C4 is grounded, one end of resistance R15 is connected with one end of resistance R16, the other end of resistance R15 is connected with 3.3V voltage.

[0023] As another embodiment of the utility model, the indication circuit includes display screen LED1, the 1 pin of display screen LED1 is connected with one end of resistance R1, the other end of resistance R1 is connected with the 1 pin of main control MCU, the 2 pin of display screen LED1 is connected with one end of resistance R2, the other end of resistance R2 is connected with the 4 pin of main control MCU, the 3 pin of display screen LED1 is connected with one end of resistance R3, the other end of resistance R3 is connected with the 9 pin of main control MCU, the 4 pin of display screen LED1 is connected with one end of resistance R4, the other end of resistance R4 is connected with the 10 pin of main control MCU, the 5 pin of display screen LED1 is connected with one end of resistance R5, the other end of resistance R5 is connected with the 12 pin of main control MCU, the 6 pin of display screen LED1 is connected with one end of resistance R6, the other end of resistance R6 is connected with the 20 pin of main control MCU.

[0024] As another embodiment of the utility model, the 16 pin of main control MCU is connected with one end of resistance R17, the other end of resistance R17 is grounded.

[0025] As another embodiment of the utility model, the 14 pin of main control MCU is connected with one end of resistance R18, the other end of resistance R18 is grounded.

[0026] As another embodiment of the utility model, the 13th pin of the main control MCU is connected with one end of the resistor R19, and the other end of the resistor R19 is grounded.

[0027] The utility model provides a single chip sink circuit with voltage current power indication function, and the circuit can be used for charging monitoring of handheld devices, reads all PDO from a PD charger, selects the DC voltage required by DC equipment, induces the DC equipment of handheld devices to transmit, and generates a voltage difference through the current flowing through the detection resistor, transmits to the main control MCU after RC filtering of the resistor capacitor, and the main control MCU is ingeniously zero checked, adopts program operation to accurately calculate the current and the voltage of the voltage dividing resistor to calculate the power, an indication unit, and different voltage current power are displayed.

[0028] The circuit can be used for charging of handheld devices, small household appliances and notebook computers, the main control MCU integrates a PD sink (decoy chip), sampling comparison, program operation, indication circuit program driving, resistance sampling, internal program through 3.3V reference bias, internal comparison, exclusive algorithm, can sample through resistance current, display current, voltage, power, charging degree, charging efficiency and charging state through the indication unit. The main control MCU induces a voltage in the PD adapter and guides to the detection resistor, compares the power resistance potential difference detected, calculates the charging power through the program, and the program driving display unit respectively indicates voltage, current and power. The TypeC chip is used for a charger or a mobile power supply, can be a Type-C male head, a Type-C female seat or a connector, the output socket is a handheld interface or a standard specification DC connector connected with a computer. The main control MCU collects the charging voltage and charging current of the PCB circuit, and converts the charging voltage and charging current into corresponding charging power.

[0029] The TypeC chip is inserted into the PD charger. The charger detects that there is a 5.1K resistor (resistor R7) on CC1, and will output 5V voltage. The 5V voltage is filtered by capacitor C1 (10uF). The 3.3V voltage output by the power supply chip U1 (LDO_7533) 3.3V stabilizer is filtered by capacitor C2 (10uF) to remove spikes and burrs. The smooth 3.3V voltage provided by diode D1 is provided to the 6th pin of the main control MCU. The main control MCU starts working. The 13th pin of the main control MCU is connected with resistor R19 (5.1K), the 14th pin is connected with resistor R18 (5.1K), and the 16th pin is connected with resistor R17 (5.1K). The codes of these three resistors inform the main control MCU how many volts of voltage are required (i.e. deceived). If resistors R17, R18 and R19 are not detected (i.e. suspended), it means that the requested voltage is 5V. If resistor R17 is not detected (i.e. suspended) and resistors R18 and R19 are detected (5.1K), it means that the requested voltage is 9V. If resistor R18 is not detected (i.e. suspended) and resistors R17 and R19 are detected (5.1K), it means that the requested voltage is 12V. If resistors R17 and R18 are not detected (i.e. suspended) and resistor R19 is detected (5.1K), it means that the requested voltage is 15V. If resistor R19 is not detected (i.e. suspended) and resistors R17 and R18 are detected (5.1K), it means that the requested voltage is 20V. If resistors R17 and R19 are not detected (i.e. suspended) and resistor R18 is detected (5.1K), it means that the requested voltage is 28V.

[0030] After the main control MCU knows the voltage to be deceived through the existence of resistors R17, R18 and R19, it differentiates resistors R11 and R12 through pins 18 and 19 of the main control MCU. The TypeC chip sends the requested voltage to the PD charger. At the same time, the main control MCU differentiates resistors R13 and R14 through pins 11 and 3. The TypeC chip sends the requested maximum power to the PD charger.

[0031] After the main control MCU requests (decoys) the output voltage, the voltage is transmitted to the 2 pin of the main control MCU through the voltage division of resistor R9 (20K) and resistor R10 (1K), and is compared through internal operation, and the voltage is displayed on the display screen LED1 driven by resistor R1, R2, R3, R4, R5, R6 (100R) of the 1, 4, 9, 10, 12, 20 pin of the main control MCU. The voltage value sampled by the current sampling resistor of detection resistor R20 is transmitted to the 5th pin of the main control MCU through the RC circuit composed of resistor R16 and capacitor C4, and after precise calculation by the program, the current is displayed on the display screen LED1 driven by resistor R1, R2, R3, R4, R5, R6 (100R) of the 1, 4, 9, 10, 12, 20 pin of the main control MCU. The main control MCU calculates the real-time power by real-time voltage and current, and displays the power on the display screen LED1.

[0032] Resistor R15 is to provide DC bias for the 5th pin of the main control MCU to improve the stability. Resistor R8 (1K) is to output the voltage decoyed by the charger which claims to be 100W through the output socket to the DC head of various old DC portable handheld devices such as computers and small household appliances.

[0033] The above is a further detailed description of the utility model in combination with specific preferred embodiments, and cannot be regarded as the specific implementation of the utility model being limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the utility model.

Claims

1. A single-chip sink circuit with voltage, current, and power indication functions, characterized in that, The application relates to a Type-C charging indicator, which comprises a main control MCU, a power supply circuit, an indication circuit and a detection resistor, wherein the input end of the main control MCU is connected with a Type-C chip, the power supply circuit is connected with the main control MCU, the indication circuit is connected with the main control MCU, the output end of the main control MCU is connected with an output socket, the detection resistor is arranged between the Type-C chip and the output socket and is connected with the main control MCU, the 19th pin of the main control MCU is connected with one end of a resistor R11, the other end of the resistor R11 is connected with the A5 pin of the Type-C chip, the 18th pin of the main control MCU is connected with one end of a resistor R12, and the other end of the resistor R12 is connected with the other end of the resistor R11.

2. The single-chip sink circuit having a voltage current power indication function according to claim 1, characterized by, The A4, B4, A9 and B9 pins of the Type-C chip are connected with an external power supply VBUS, the 1 pin of the output socket is connected with the external power supply VBUS, the 0 pin of the Type-C chip is connected with one end of the detection resistor, and the other end of the detection resistor is connected with the 2 pin of the output socket.

3. The single-chip sink circuit having a voltage current power indication function according to claim 1, wherein, The 3 pin of the main control MCU is connected with one end of a resistor R14, and the other end of the resistor R14 is connected with the B5 pin of the Type-C chip.

4. The single-chip sink circuit having a voltage current power indication function according to claim 1, wherein, The power supply circuit comprises a power supply chip U1 and a diode D1, the 3 pin of the power supply chip U1 is connected with the external power supply VBUS, the 2 pin of the power supply chip U1 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the 6 pin of the main control MCU, one end of a capacitor C1 is connected with the 3 pin of the power supply chip U1, one end of a capacitor C2 is connected with the 2 pin of the power supply chip U1, the VSS end of the power supply chip, the other end of the capacitor C1 and the other end of the capacitor C2 are grounded.

5. The single-chip sink circuit having a voltage current power indication function according to claim 1, wherein, One end of a capacitor C3 is connected with the 6 pin of the main control MCU, and the other end of the capacitor C3 is grounded.

6. The single-chip sink circuit having a voltage current power indication function according to claim 1, wherein, The inverting input end of an amplifier is connected with one end of the detection resistor, the inverting input end of the amplifier is grounded, the non-inverting input end of the amplifier is connected with one end of a resistor R16, the other end of the resistor R16 is connected with the other end of the detection resistor, the output end of the amplifier is connected with the main control MCU, one end of a capacitor C4 is connected with the non-inverting input end of the amplifier, the other end of the capacitor C4 is grounded, one end of a resistor R15 is connected with one end of the resistor R16, and the other end of the resistor R15 is connected with a 3.3V voltage.

7. The single-chip sink circuit having a voltage current power indication function according to claim 1, wherein, The indication circuit includes a display screen LED1, the 1 pin of the display screen LED1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the 1 pin of the main control MCU, the 2 pin of the display screen LED1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the 4 pin of the main control MCU, the 3 pin of the display screen LED1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the 9 pin of the main control MCU, the 4 pin of the display screen LED1 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with the 10 pin of the main control MCU, the 5 pin of the display screen LED1 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the 12 pin of the main control MCU, the 6 pin of the display screen LED1 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with the 20 pin of the main control MCU.

8. The single-chip sink circuit having a voltage current power indication function according to claim 1, wherein, The 16 pin of the main control MCU is connected with one end of the resistor R17, the other end of the resistor R17 is grounded.

9. The single-chip sink circuit having a voltage current power indication function according to claim 1, wherein, The 14 pin of the main control MCU is connected with one end of the resistor R18, the other end of the resistor R18 is grounded.

10. The single-chip sink circuit having a voltage current power indication function according to claim 1, wherein, The 13 pin of the main control MCU is connected with one end of the resistor R19, the other end of the resistor R19 is grounded.

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