US 11,996,847 B1
Power transistor adaptive clamp circuit
Taisuke Kazama, Plano, TX (US); Mustapha El-Markhi, Richardson, TX (US); and Avadhut Junnarkar, McKinney, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Nov. 29, 2022, as Appl. No. 18/059,832.
Int. Cl. H02M 1/00 (2006.01); H01L 29/866 (2006.01); H02M 1/32 (2007.01); H02M 3/155 (2006.01); H02M 3/335 (2006.01); H03K 5/00 (2006.01); H03K 5/08 (2006.01); H03K 17/687 (2006.01)
CPC H03K 5/084 (2013.01) [H01L 29/866 (2013.01); H02M 3/155 (2013.01); H03K 17/687 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An adaptive clamp circuit, comprising:
a clamp circuit including:
a first transistor having:
a first current terminal coupled to a switching terminal;
a second current terminal coupled to a ground terminal; and
a control terminal;
a second transistor having:
a first current terminal coupled to the control terminal of the first transistor;
a second current terminal coupled to the switching terminal; and
a control terminal; and
a variable resistor coupled between the control terminal of the second transistor and the ground terminal; and
a clamp control circuit coupled between the switching terminal and the variable resistor.