US 12,424,930 B2
Active snubber circuit
Weibing Jing, Beijing (CN); Dan Li, Beijing (CN); Qi Yang, Beijing (CN); and Liang Zhang, Beijing (CN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Jan. 9, 2023, as Appl. No. 18/151,644.
Prior Publication US 2024/0235380 A1, Jul. 11, 2024
Int. Cl. H02M 1/34 (2007.01); H02M 3/155 (2006.01); H03K 17/0814 (2006.01)
CPC H02M 1/344 (2021.05) [H03K 17/08142 (2013.01); H02M 3/155 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a first transistor having a first control terminal, in which the first transistor is coupled between a power terminal and a ground terminal;
a second transistor having a second control terminal, in which the second transistor is coupled between the first control terminal and the ground terminal;
a resistor;
a third transistor having a third control terminal, in which the third transistor is coupled between the resistor and the ground terminal, and the resistor is coupled between the first control terminal and the third transistor; and
circuitry having first and second inputs, in which the first input is coupled to the power terminal and the second input is coupled to the first control terminal;
wherein the circuitry includes:
a third input, in which the third input is a target voltage input;
a first comparator having a first comparator output and first and second comparator inputs, in which the first comparator input is coupled to the power terminal, and the second comparator input is coupled to the third input; and
control circuitry having a control circuitry output and first and second control circuitry inputs, in which the first control circuitry input is coupled to the first comparator output, and the control circuitry output is coupled to the second control terminal.