US 12,088,184 B2
Current regulator system
Ivan Shumkov, Freising (DE); Erich-Johann Bayer, Freising (DE); and Ruediger Ganz, Freising (DE)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on May 5, 2023, as Appl. No. 18/143,808.
Application 18/143,808 is a division of application No. 17/136,442, filed on Dec. 29, 2020, granted, now 11,682,961.
Claims priority of provisional application 62/984,049, filed on Mar. 2, 2020.
Prior Publication US 2023/0308004 A1, Sep. 28, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01)
CPC H02M 1/0009 (2021.05) [H02M 3/1582 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A circuit comprising:
a switching voltage regulator including a first input, a second input, and an output, the first input coupled to a source of an input current;
a current regulator including an input, a first output and a second output, the input coupled to the source of the input current, the current regulator configured to provide at the first output a comparison signal having a logic state responsive to a current sampling voltage, the current regulator configured to provide a reference current at the second output proportional to a maximum average amplitude setpoint of the input current over a switching period of the switching voltage regulator; and
a switch controller including a first input, a second input, a third input and an output, the first input coupled to the first output of the current regulator, the second input coupled to the output of the switching voltage regulator, and the third input adapted to be coupled to a reference voltage source, the output of the switch controller coupled to the second input of the switching voltage regulator;
wherein the current regulator includes a sampling capacitor having an input to receive a sampling current in a first switching phase of the switching voltage regulator responsive to a switching signal provided from the output of the switch controller; and
wherein the sampling current includes an amplitude equal to a charging current flowing to the sampling capacitor minus the reference current flowing from the sampling capacitor.