公开(公告)号：US20210203224A1

公开(公告)日：2021-07-01

申请号：US17203569

申请日：2021-03-16

Applicant: QUALCOMM Incorporated

Inventor： Burt Lee PRICE ,  Wenjun YUN

IPC: H02M3/155 ,  G01R19/25 ,  H02M1/088 ,  H03F3/45 ,  H03K5/24

Abstract: Current sensing in an on-die direct current-direct current (DC-DC) converter for measuring delivered power is disclosed. A DC-DC converter converts input voltage to output current at an output voltage coupled to a load circuit. The DC-DC converter includes a high side driver (HSD) circuit to drive the output current in a first stage, and a low side driver (LSD) circuit to couple the power output to a negative supply rail (GND) in a second phase, output current being periodic. The DC-DC converter includes an amplifier circuit to equalize an output voltage and a mirror voltage. Based on the mirror voltage, the current sensing circuit generates mirror current that corresponds to driver current. The mirror current can be measured as a representation of the output current delivered to the load circuit. A plurality of the DC-DC converters can provide multi-phased current to the load circuit for providing power to the load circuit.