US 11,811,307 B2
Methods and apparatus to improve power factor correction circuits with voltage multiplier assist
Isaac Cohen, Dix Hills, NY (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Oct. 29, 2020, as Appl. No. 17/084,133.
Claims priority of provisional application 62/988,684, filed on Mar. 12, 2020.
Prior Publication US 2021/0288574 A1, Sep. 16, 2021
Int. Cl. H02M 1/42 (2007.01)
CPC H02M 1/4225 (2013.01) 24 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a power conversion circuit having a power control input, a power output, and first and second alternating current (AC) power inputs;
a power conversion control circuit having a power control output coupled to the power control input;
a voltage multiplier control circuit having a control output and first, second, and third multiplier control inputs, the first multiplier control input coupled to the first AC power input, the second multiplier control input coupled to the second AC power input, the third multiplier control input coupled to the power output, and the voltage multiplier control circuit including:
an absolute value circuit having a circuit output and first and second circuit inputs, the first circuit input coupled to the first multiplier control input, and the second circuit input coupled to the second multiplier control input;
a comparator having a comparator output and first and second comparator inputs, the first comparator input coupled to the circuit output, the second comparator input coupled to the third multiplier control input, and the comparator output coupled to the control output.