US 12,407,265 B2
Switching frequency control for integrated resonant half-bridge isolated DC/DC with burst mode operation
Jose V. Formenti, Dallas, TX (US); Robert Martinez, Lucas, TX (US); Michael Corry, Dallas, TX (US); and Sombuddha Chakraborty, Redwood City, CA (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Aug. 30, 2022, as Appl. No. 17/898,916.
Prior Publication US 2024/0072675 A1, Feb. 29, 2024
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 3/00 (2006.01)
CPC H02M 3/33576 (2013.01) [H02M 1/0035 (2021.05); H02M 3/01 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a control circuit having a voltage input and a control circuit output, the control circuit configured to produce a control voltage at the control circuit output having a magnitude inversely related to a magnitude of an input voltage at the input voltage input;
a voltage-controlled oscillator (VCO) having a VCO control input and a VCO clock output, the VCO control input coupled to the control circuit output, the VCO configured to produce a VCO clock on the VCO clock output having a frequency that is a function of the control voltage; and
a protection circuit having a first clock input, a second clock input, and a protection circuit output, the second clock input coupled to the VCO clock output, the protection circuit configured to generate a protection circuit output signal at the protection circuit output based on a difference in frequency between a clock signal at the first clock input and the VCO clock.