US 12,451,882 B2
Driving circuit
Weicheng Zhou, Shanghai (CN); Chongfeng Zheng, Shanghai (CN); Minghui Dai, Shanghai (CN); and Min Zhou, Shanghai (CN)
Assigned to Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed on May 31, 2024, as Appl. No. 18/680,559.
Claims priority of application No. 202310651225.2 (CN), filed on Jun. 2, 2023.
Prior Publication US 2024/0405766 A1, Dec. 5, 2024
Int. Cl. H03K 17/30 (2006.01); H03K 17/06 (2006.01); H03K 17/687 (2006.01)
CPC H03K 17/302 (2013.01) [H03K 17/063 (2013.01); H03K 17/687 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A driving circuit electrically connected with at least one switch element to drive operations of the at least one switch element, each of the at least one switch element comprising a control terminal, a first power terminal and a second power terminal, the at least one switch element comprising a first switch element, the second power terminal of the first switch element receiving a first voltage, the driving circuit comprising:
a switching circuit receiving a first signal, wherein the switching circuit is electrically connected with a first voltage terminal and a ground terminal, and the switching circuit comprises an output terminal, wherein the first signal is switched between a high-voltage level state and a low-voltage level state, the first voltage terminal receives a second voltage, and a voltage at the output terminal of the switching circuit is switched between the second voltage and a voltage at the ground terminal according to the first signal;
a first unidirectional switch comprising a first terminal and a second terminal, wherein the first terminal of the first unidirectional switch is electrically connected to a second voltage terminal to receive a third voltage; and
a first capacitor, wherein a first terminal of the first capacitor is electrically connected with the output terminal of the switching circuit, and a second terminal of the first capacitor is electrically connected with the second terminal of the first unidirectional switch and the control terminal of the first switch element,
wherein the first voltage is a floating voltage, a result of the second voltage plus the third voltage minus a sum of a conduction voltage of the first unidirectional switch and the first voltage is greater than a first threshold voltage of the first switch element,
wherein the first capacitor has a capacitance value, and the first capacitor has a charge during a charging-discharging process, wherein a ratio of the charge to the capacitance value satisfies an equation of:

OG Complex Work Unit Math
wherein Qg is the charge, Cdd is the capacitance value, V1 is the second voltage, V2 is the third voltage, and Vfloat is the first voltage.