A power conversion module

Abstract

The utility model discloses a power conversion module relates to power conversion board technical field, including singlechip system, AC DC power conversion module, DC DC power conversion module, external input control module and LED drive module, wherein, AC DC power conversion module input end connects alternating voltage, and the output of AC DC power conversion module is connected with DC DC power conversion module and the voltage input of LED drive module respectively. The utility model discloses a board card design scheme that can according to external input combination situation, control LED lamp brightness has been designed planning from AC DC power conversion module, DC DC power conversion module, singlechip system, external input control module, LED drive module etc. part carries out specific design, realizes the board card design of control LED lamp brightness, solves the problem that the existing power conversion board card only has import chip version, cannot achieve the problem of nationalization.

Claims

1. A power conversion module, characterized in that, include: Microcontroller system, AC-DC power conversion module, DC-DC power conversion module, external input control module and LED driver module; The AC-DC power conversion module has an input terminal connected to an AC voltage, an output terminal connected to the voltage input terminals of the DC-DC power conversion module and the LED driver module, and an output terminal connected to the voltage input terminals of the microcontroller system and the external input control module. The input terminal of the external input control module is connected to the control signal, and the output terminal of the external input control module is connected to the signal input terminal of the microcontroller system. The output terminal of the microcontroller system is connected to the signal input terminal of the LED driver module, and the output terminal of the LED driver module outputs LED control signals.

2. The power conversion module according to claim 1, characterized in that, The microcontroller system includes a microcontroller chip U1, resistors R1, R2, R3, R4, R10, R29, capacitors C1, C2, C3, C4, C5, C6, C11, C12, C13, C14, a switch SW1, a crystal oscillator G1, and an interface J3. Specifically, pin 46 of the microcontroller chip U1 is connected to pin 2 of interface J3 and one end of resistor R2; the other end of resistor R2 is connected to pin 1 of interface J3 and a 3.3V voltage signal. Pin 49 of the microcontroller chip U1 is connected to one end of resistor R1 and pin 4 of interface J3; the other end of resistor R1 is connected to pin 3 of interface J3 and grounded. Pin 28 of the microcontroller chip U1 is connected to one end of resistor R10; the other end of resistor R10 is grounded. Pins 32, 48, 64, 19, and 13 of the microcontroller chip U1 are connected to one end of capacitor C13, one end of capacitor C14, one end of capacitor C3, one end of capacitor C4, one end of capacitor C5, one end of capacitor C6, and one end of capacitor C2. The other end of capacitor C13 is connected to and grounded to the other ends of capacitors C14, C3, C4, C5, C6, and C2. Pin 7 of the microcontroller chip U1 is connected to one end of resistor R3, one end of capacitor C1 and one end of switch SW1 respectively. The other end of resistor R3 is connected to a 3.3V voltage signal, and the other end of capacitor C1 is connected to the other end of switch SW1 and grounded. Pin 6 of the microcontroller chip U1 is connected to one end of the crystal oscillator G1, one end of the resistor R29, and one end of the capacitor C11. Pin 5 of the microcontroller chip U1 is connected to the other end of the crystal oscillator G1, the other end of the resistor R29, and one end of the capacitor C12. The other end of the capacitor C11 is connected to the other end of the capacitor C12 and grounded.

3. A power conversion module according to claim 1, characterized in that, The AC-DC power conversion module includes chip U2, chip U3, resistor R6, capacitor C22, capacitor C30, diode V1, capacitor C20, and capacitor C19. Specifically, pin 1 of chip U3 is connected to a 220V B voltage signal, pin 2 of chip U3 is connected to a 220V A voltage signal, pin 5 of chip U3 is connected to pin 2 of chip U2, pin 3 of chip U3 is connected to pin 2 of chip U2, pin 1 of chip U2 is connected to one end of capacitor C20, the other end of capacitor C20 is connected to one end of capacitor C19 and grounded, pin 4 of chip U2 is connected to one end of capacitor C30, one end of capacitor C22 and the cathode of diode V1, pin 8 of chip U2 is connected to the other end of capacitor C30, the other end of capacitor C22 and one end of resistor R6 and outputs a 24V DC voltage signal, the other end of resistor R6 is connected to the anode of diode V1.

4. A power conversion module according to claim 1, characterized in that, The DC-DC power conversion module includes: chip U5, resistor R5, resistor R19, resistor R20, resistor R27, ferrite bead FB1, capacitor C7, capacitor C8, capacitor C23, capacitor C26, capacitor C29, capacitor C31 and inductor L1. Specifically, pin 5 of chip U5 is connected to one end of resistor R5, one end of capacitor C23, and a 24V DC voltage signal. The other end of capacitor C23 is grounded. The other end of resistor R5 is connected to one end of resistor R19 and pin 4 of chip U5. The other end of resistor R19 is connected to pin 2 of chip U5 and grounded. Pin 1 of chip U5 is connected to one end of capacitor C8. The other end of capacitor C8 is connected to pin 6 of chip U5 and one end of inductor L1. The other end of inductor L1... The resistor R27 is connected to one end of the resistor R27, one end of the capacitor C26, one end of the ferrite bead FB1, and one end of the capacitor C29. The other end of the resistor R27 is connected to the other end of the capacitor C26, one end of the resistor R20, and the third pin of the chip U5. The other end of the resistor R20 is grounded. The other end of the ferrite bead FB1 is connected to one end of the capacitor C7, one end of the capacitor C31, and a 3.3V voltage signal. The other end of the capacitor C7 is connected to the other end of the capacitor C29 and the other end of the capacitor C31 and is grounded.

5. A power conversion module according to claim 1, characterized in that, The external input control module includes: an optocoupler D1, a resistor R21, a resistor R22, and a resistor R8; Specifically, one end of resistor R21 is connected to the INPUT1 signal, and the other end of resistor R21 is connected to pin 1 of optocoupler D1. One end of resistor R22 is connected to the 220VB voltage signal, and the other end of resistor R22 is connected to pin 2 of optocoupler D1. Pin 3 of optocoupler D1 is grounded. Pin 4 of optocoupler D1 is connected to one end of resistor R8 and outputs the IN1_ST signal. The other end of resistor R8 is connected to the 3.3V voltage signal.

6. A power conversion module according to claim 1, characterized in that, The LED driver module includes: chip U4, inductor L2, resistor R11, resistor R28, resistor R30, resistor R31, resistor R32, capacitor C21, capacitor C28, capacitor C32, and transistor Q1; In this configuration, one end of resistor R28 is connected to the PWM signal, and the other end of resistor R28 is connected to the collector of transistor Q1, one end of capacitor C28, one end of resistor R11, and pin 3 of chip U4. The other end of capacitor C28 is grounded, and the other end of resistor R11 is grounded. The gate of transistor Q1 is connected to one end of resistor R32 and one end of resistor R31. The other end of resistor R32 is connected to the emitter of transistor Q1 and grounded. The other end of resistor R31 is connected to one end of capacitor C32. The other end of capacitor C32 is connected to one end of resistor R30, the cathode of diode D4, and pin 5 of chip U4. Pin 1 of chip U4 is connected to one end of inductor L2 and the anode of diode D4. The other end of inductor L2 is connected to one end of capacitor C21 and the LED1- signal. The other end of capacitor C21 is connected to the other end of resistor R30 and the LED1+ signal.

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