Power supply device supporting power delivery

Abstract

A power supply supporting power transmission includes: a bridge rectifier, a voltage divider circuit, a reactive element, a first power switch, a first output stage circuit, a transformer, a second power switch, a second output stage circuit, and a detection and control circuit. The bridge rectifier generates a rectified potential based on a first input potential and a second input potential. The voltage divider circuit generates a divided voltage potential based on the rectified potential. The detection and control circuit includes a power transmission integrated circuit, wherein the detection and control circuit continuously monitors the divided voltage potential and determines whether to enable or disable the first power switch based on this divided voltage potential.

Claims

1. A power supply supporting power transmission, comprising: A bridge rectifier generates a rectified potential based on a first input potential and a second input potential; a voltage divider circuit generates a divided potential based on the rectified potential; a reactive element receives the rectified potential; a first power switch selectively couples the reactive element to a ground potential based on a first drive potential; a first output stage circuit is coupled to the reactive element and generates an intermediate potential; a transformer includes a main coil and a secondary coil, wherein the main coil is used to receive the intermediate potential and the secondary coil is used to generate an induced potential; a second power switch selectively couples the main coil to the ground potential based on a second drive potential; a second output stage circuit generates an output potential based on the induced potential and a control potential; and a detection and control circuit generates the first drive potential, the second drive potential, and the control potential, wherein the detection and control circuit includes a power transmission integrated circuit. The detection and control circuit continuously monitors the voltage divider potential and determines whether to enable or disable the first power switch based on the voltage divider potential.

2. The power supply as claimed in claim 1, wherein the bridge rectifier comprises: A first diode having an anode and a cathode, wherein the anode system of the first diode is coupled to a first input node to receive the first input potential, and the cathode system of the first diode is coupled to a first node to output the rectified potential; a second diode having an anode and a cathode, wherein the anode system of the second diode is coupled to a second input node to receive the second input potential, and the cathode system of the second diode is coupled to the first node; a third diode having an anode and a cathode, wherein the anode system of the third diode is coupled to the ground potential, and the cathode system of the third diode is coupled to the first input node; And a fourth diode having an anode and a cathode, wherein the anode of the fourth diode is coupled to the ground potential, and the cathode of the fourth diode is coupled to the second input node.

3. The power supply as described in claim 2, wherein the voltage divider circuit includes: A first resistor has a first terminal and a second terminal, wherein the first terminal of the first resistor is coupled to the first node to receive the rectified potential, and the second terminal of the first resistor is coupled to a second node to output the voltage divider potential. and a second resistor having a first end and a second end, wherein the first end of the second resistor is coupled to the second node, and the second end of the second resistor is coupled to the ground potential.

4. The power supply as claimed in claim 2, wherein the reactive element comprises: A boost inductor having a first terminal and a second terminal, wherein the first terminal of the boost inductor is coupled to the first node to receive the rectified potential, and the second terminal of the boost inductor is coupled to a third node; and a first capacitor having a first terminal and a second terminal, wherein the first terminal of the first capacitor is coupled to the first node, and the second terminal of the first capacitor is coupled to the ground potential.

5. The power supply as claimed in claim 4, wherein the first output stage circuitry includes: A fifth diode having an anode and a cathode, wherein the anode of the fifth diode is coupled to the third node and the cathode of the fifth diode is coupled to a fourth node to output the intermediate potential; and a second capacitor having a first terminal and a second terminal, wherein the first terminal of the second capacitor is coupled to the fourth node and the second terminal of the second capacitor is coupled to the ground potential.

6. The power supply as claimed in claim 5, wherein the transformer further incorporates a magnetizing inductor, the main coil having a first end and a second end, the first end of the main coil being coupled to the fourth node to receive the intermediate potential, the second end of the main coil being coupled to a fifth node, the magnetizing inductor having a first end and a second end, the first end of the magnetizing inductor being coupled to the fourth node, the second end of the magnetizing inductor being coupled to the fifth node, the secondary coil having a first end and a second end, the first end of the secondary coil being coupled to a sixth node to output the induced potential, and the second end of the secondary coil being coupled to a common node.

7. The power supply as claimed in claim 6, wherein the first power switch comprises: A first transistor has a control terminal, a first terminal, and a second terminal, wherein the control terminal of the first transistor is used to receive the first drive potential, the first terminal of the first transistor is coupled to the ground potential, and the second terminal of the first transistor is coupled to the third node; wherein the second power switch includes: a second transistor having a control terminal, a first terminal, and a second terminal, wherein the control terminal of the second transistor is used to receive the second drive potential, the first terminal of the second transistor is coupled to the ground potential, and the second terminal of the second transistor is coupled to the fifth node.

8. The power supply as claimed in claim 6, wherein the second output stage circuitry includes: A sixth diode having an anode and a cathode, wherein the anode of the sixth diode is coupled to the sixth node to receive the induced potential, and the cathode of the sixth diode is coupled to a seventh node; a third capacitor having a first terminal and a second terminal, wherein the first terminal of the third capacitor is coupled to the seventh node, and the second terminal of the third capacitor is coupled to the common node; a third transistor having a control terminal, a first terminal, and a second terminal, wherein the control terminal of the third transistor is used to receive the control potential, the first terminal of the third transistor is coupled to an output node to selectively output the output potential, and the second terminal of the third transistor is coupled to the seventh node; and a fourth capacitor having a first terminal and a second terminal, wherein the first terminal of the fourth capacitor is coupled to the output node, and the second terminal of the fourth capacitor is coupled to the common node.

9. The power supply as claimed in claim 1, wherein the detection and control circuitry further comprises: A first microcontroller generates the first driving potential and detects a plurality of peak values ​​of the voltage divider potential in a plurality of detection cycles. and a second microcontroller that generates the second drive potential and the control potential; wherein the power transmission integrated circuit is coupled between the first microcontroller and the second microcontroller, enabling the first microcontroller and the second microcontroller to communicate with each other; wherein the first input potential has a switching frequency, and the duration of each of the detection cycles is approximately equal to half the reciprocal of the switching frequency.

10. The power supply as claimed in claim 9, wherein the first microcontroller further compares the peak values ​​with a critical potential, and if N consecutive peak values ​​are below the critical potential, the first microcontroller stops generating the first drive potential to disable the first power switch, and if M consecutive peak values ​​are above the critical potential, the first microcontroller resumes generating the first drive potential to enable the first power switch.

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