US 12,476,532 B2
Bidirectional power switch circuit
Ranga Seshu Paladugu, Milpitas, CA (US); Soon G Lim, San Jose, CA (US); Ronak Prakashchandra Trivedi, Cupertino, CA (US); and Carmelo Morello, San Jose, CA (US)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on Nov. 30, 2023, as Appl. No. 18/524,821.
Claims priority of application No. 22210795 (EP), filed on Dec. 1, 2022.
Prior Publication US 2024/0186882 A1, Jun. 6, 2024
Int. Cl. H02M 1/00 (2007.01); H02M 3/158 (2006.01)
CPC H02M 1/0054 (2021.05) [H02M 3/158 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bidirectional power switch (BPS) circuit comprising:
first and second terminals;
first and second MOSFETs connected in series between the first and second terminals and comprising respective first and second source to body diodes;
first and second power supply rails;
a first switchable current source connected between the first power supply rail and a body terminal of the first MOSFET;
a second switchable current source connected between the first power supply rail and a common node connected to a source terminal of each of the first and second MOSFETs;
a third switchable current source connected between one of the first and second power supply rails and a gate terminal of the first MOSFET;
a fourth switchable current source connected between the second power supply rail and the body terminal of the first MOSFET;
a fifth switchable current source connected between the second power supply rail and the common node;
a first resistor connected between the body terminal of the first MOSFET and the common node;
a second resistor connected between the gate terminal of the first MOSFET and the common node; and
a BPS switching controller configured to control operation of the BPS circuit between a BPS ON state in which the first and second terminals are connected through the first and second MOSFETs and a BPS OFF state in which the first and second terminals are disconnected.