US 11,721,969 B2
Electronic device and over current protection circuit
Jianjian Sheng, Zhuhai (CN); and Yaobin Guan, Zhuhai (CN)
Assigned to INNOSCIENCE (ZHUHAI) TECHNOLOGY CO., LTD., Zhuhai (CN)
Appl. No. 16/960,085
Filed by INNOSCIENCE (ZHUHAI) TECHNOLOGY CO., LTD., Zhuhai (CN)
PCT Filed May 20, 2020, PCT No. PCT/CN2020/091297
§ 371(c)(1), (2) Date Jul. 5, 2020,
PCT Pub. No. WO2021/232286, PCT Pub. Date Nov. 25, 2021.
Prior Publication US 2022/0376490 A1, Nov. 24, 2022
Int. Cl. H02H 7/00 (2006.01); H02H 7/20 (2006.01)
CPC H02H 7/20 (2013.01) 15 Claims
OG exemplary drawing
 
1. An electronic device, comprising:
a first group III nitride transistor; and
an over current protection (OCP) circuit comprising:
an input device configured to receive a control signal and to generate a first voltage to a gate of the first group III nitride transistor; and
a detection device configured to generate an output signal having a first logical value if a current at a drain of the first group III nitride transistor is less than a predetermined value and to generate the output signal having a second logical value if the current at the drain of the first group III nitride transistor is equal to or greater than the predetermined value, wherein the first logical value is different from the second logical value; and wherein the detection device includes:
a comparator having a first input configured to receive a reference voltage, a second input configured to receive a second voltage and an output configured to output a third voltage; and
a first inverter having an input configured to receive the third voltage and an output configured to output the output signal.