US 12,273,037 B2
Electronic device and driving circuit thereof
Sheng-Hsi Hung, Taoyuan (TW); and Yen-Ching Lin, Hsinchu County (TW)
Assigned to Novatek Microelectronics Corp., Hsinchu (TW)
Filed by Novatek Microelectronics Corp., Hsinchu (TW)
Filed on Jun. 29, 2022, as Appl. No. 17/852,392.
Prior Publication US 2024/0007004 A1, Jan. 4, 2024
Int. Cl. H02M 3/335 (2006.01); H02M 1/08 (2006.01); H02M 1/42 (2007.01)
CPC H02M 3/33569 (2013.01) [H02M 1/08 (2013.01); H02M 1/4208 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A driving circuit, comprising:
a first driving signal generator, generating a first driving signal according a first input signal, wherein the first driving signal is a pulse width modulated signal;
a first voltage conversion circuit, coupled between the first driving signal generator and a control terminal of a first power transistor, and converting the first driving signal to an output driving signal by charging a capacitor and discharging the capacitor, wherein the output driving signal is output to the control terminal of the first power transistor; and
a first switch, couple with the first power transistor in series, and being controlled by a control signal to be turned-on or cut-off,
wherein the first voltage conversion circuit comprises:
a second switch, having a first end coupled to an output end of the first driving signal generator and a second end coupled to one end of the capacitor, and providing a charging path for a charging operation for the capacitor; and
a third switch, having a first end coupled to the output end of the first driving signal generator and a second end coupled to the other end of the capacitor and the control terminal of the first power transistor, and providing a discharging path for a discharging operation for the capacitor.