US 11,710,976 B2
USB-PD supply interface and associated method
Alexandre Pons, Vizille (FR); Jean Camiolo, St. Egreve (FR); and Meriem Mersel, Saint-Etienne (FR)
Assigned to STMICROELECTRONICS (ALPS) SAS, Grenoble (FR); and STMICROELECTRONICS (GRENOBLE 2) SAS, Grenoble (FR)
Filed by STMicroelectronics (Alps) SAS, Grenoble (FR); and STMicroelectronics (Grenoble 2) SAS, Grenoble (FR)
Filed on Feb. 26, 2021, as Appl. No. 17/187,478.
Claims priority of application No. 2002010 (FR), filed on Feb. 28, 2020.
Prior Publication US 2021/0273548 A1, Sep. 2, 2021
Int. Cl. H02J 7/00 (2006.01); H02M 1/08 (2006.01)
CPC H02J 7/00712 (2020.01) [H02J 7/007192 (2020.01); H02J 2207/20 (2020.01); H02J 2207/30 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A power supply interface comprising:
a converter configured to receive a power supply voltage, the converter comprising a first terminal configured to deliver a first direct current (DC) voltage;
a first resistor and a first switch in series between the first terminal and an output terminal of the interface configured to deliver a second DC voltage;
a first circuit configured to receive a first signal and to deliver a second signal representative of a difference between the second DC voltage and a voltage threshold when the first signal is in a first state, and a default value when the first signal is in a second state;
a second circuit configured to deliver a third signal representative of a value of a first current in the first resistor multiplied by a gain of the second circuit, and to modify the gain based on the second signal; and
a third circuit configured to deliver a control signal for controlling the converter based on a current threshold, on a first target value of the second DC voltage, on a current value of the second DC voltage, and on the third signal.