US 11,716,021 B1
Power converter for providing negative voltage
Ping-Yu Tsai, Hsinchu (TW); and Fu-Chuan Chen, Hsinchu (TW)
Assigned to ANPEC ELECTRONICS CORPORATION, Hsinchu (TW)
Filed by ANPEC ELECTRONICS CORPORATION, Hsinchu (TW)
Filed on May 6, 2022, as Appl. No. 17/738,070.
Claims priority of application No. 111107238 (TW), filed on Mar. 1, 2022.
Int. Cl. H02M 3/158 (2006.01); H02M 3/157 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/157 (2013.01) [H02M 1/0083 (2021.05); H02M 3/1582 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power converter for providing a negative voltage, comprising:
a coupling controller circuit including a first terminal, a second terminal, a first reverse logic circuit and a second reverse logic circuit, wherein the first reverse logic circuit includes an input terminal and an output terminal, the second reverse logic circuit includes an input terminal and an output terminal, the first terminal of the coupling controller circuit receives a digital control signal, and the second terminal of the coupling controller circuit provides a control signal; and
a reverse voltage converter circuit configured to receive the control signal and provide a reverse voltage that is a negative voltage, wherein the reverse voltage converter circuit includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a coupling control signal triggering circuit and a pulse width modulation circuit;
wherein the output terminal of the first reverse logic circuit is connected to the input terminal of the second reverse logic circuit, the output terminal of the second reverse logic circuit is connected to the pulse width modulation circuit and is configured to provide a trigger signal to the pulse width modulation circuit, and the pulse width modulation circuit turns on or off the reverse voltage converter circuit according to the trigger signal.