US 12,183,527 B2Granted

Drive circuit

AssigneeContemporary Amperex Technology (Hong Kong) Limited

InventorsJirong Huo, Yanhui Fu, Le Chu, Changjian Liu

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Abstract

Embodiments of this application relate to the field of electricity, and disclose a drive circuit. In some embodiments of this application, the drive circuit includes a low-side driver module and a delay module, the delay module is configured to output a delay signal of preset duration to the low-side driver module in a case that a control module is being reset; and the low-side driver module is configured to: according to on the delay signal of preset duration, maintain a first state within the preset duration, the first state being the same as a second state; where the second state is a working state of the low-side driver module before the control module is reset, and the second state includes being on or off. The embodiments can help avoid safety hazards caused by unexpected disconnection of a drive signal of the control module.

Claims10

Dependent claims

A drive circuit, wherein the drive circuit comprises a low-side driver module and a delay module;

the delay module is configured to output a delay signal of preset duration to the low-side driver module in a case that a control module is being reset;
and
the low-side driver module is configured to:
according to the delay signal of preset duration, maintain a first state within the preset duration, wherein the first state is the same as a second state;
wherein the second state is a working state of the low-side driver module before the control module is reset, and the second state comprises being on or off,
wherein the drive circuit is configured to drive a load, and the load is grounded through the low-side driver module;
and
the low-side driver module comprises a first low-side driver unit and a second low-side driver unit, wherein a first terminal of the first low-side driver unit and a first terminal of the second low-side driver unit are both connected to the load, a second terminal of the first low-side driver unit and a second terminal of the second low-side driver unit are grounded, the control module is connected to a control terminal of the first low-side driver unit, and the delay module is connected to a control terminal of the second low-side driver unit.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/740,714Filed 10 May 2022 · continuation
Priority: CN 202010479364.829 May 2020
Published: US 2022/0270838 A125 Aug 2022
Granted: 31 Dec 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H01H 47/18
For modifying the operation of the relay: for introducing delay in the operation of the relay
H03K 17/0822
By feedback from the output to the control circuit: in field-effect transistor switches
B60L 3/0023
Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy…:…
H01H 47/002
Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide…:…

Family

PCT/CN2021/079606Parent of this continuation · filed 8 Mar 2021
US 2022/0270838 A1Pre-grant publication · published 25 Aug 2022
US 12,183,527 B2This patent

From the US filing history. Foreign family members aren’t listed.

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