US 12,424,923 B2
Power converter having high-side driving mechanism consuming low power
Ping-Yu Huang, Hsinchu (TW); and Tzu-Yang Yen, Taipei (TW)
Assigned to ANPEC ELECTRONICS CORPORATION, Hsinchu (TW)
Filed by ANPEC ELECTRONICS CORPORATION, Hsinchu (TW)
Filed on Apr. 9, 2023, as Appl. No. 18/297,637.
Claims priority of application No. 111142905 (TW), filed on Nov. 10, 2022.
Prior Publication US 2024/0162807 A1, May 16, 2024
Int. Cl. H02M 3/158 (2006.01); H02M 1/08 (2006.01)
CPC H02M 1/08 (2013.01) [H02M 3/158 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A power converter having a high-side driving mechanism consuming low power, comprising:
a high-side switch, wherein a first terminal of the high-side switch is coupled to an input voltage;
a low-side switch, wherein a first terminal of the low-side switch is connected to a second terminal of the high-side switch, and a second terminal of the low-side switch is grounded;
a control circuit connected to a control terminal of the high-side switch and a control terminal of the low-side switch, and configured to control the high-side switch and the low-side switch to operate;
a bootstrap circuit including a bootstrap capacitor, wherein a first terminal of the bootstrap capacitor is connected to a node between the first terminal of the low-side switch and the second terminal of the high-side switch; and
a charging circuit connected to a second terminal of the bootstrap capacitor, wherein the charging circuit charges the bootstrap capacitor, the charging circuit detects data of the bootstrap capacitor to determine whether or not to stop charging the bootstrap capacitor or to adjust charging of the bootstrap capacitor;
wherein the charging circuit is configured to charge the bootstrap capacitor until when a voltage of the bootstrap capacitor reaches a reference voltage so that the high-side switch is successfully turned on;
wherein, when the charging circuit determines that the voltage of the bootstrap capacitor reaches the reference voltage according to the data of the bootstrap capacitor, the charging circuit stops charging the bootstrap capacitor.