USPTO Patent Granted for Motor Driving Circuit

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 24th, 2026

Detected March 26th, 2026

Summary

The USPTO has granted a patent (US12587115B2) to Chengdu Monolithic Power Systems Co., Ltd. for a motor driving circuit and control method. The patent details a system incorporating a multiplexer, current polarity detection, and bridge circuits to manage motor operation, including low-dropout linear regulation mode.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12587115B2 for a "Driving circuit for motor systems and control method thereof" to Chengdu Monolithic Power Systems Co., Ltd. The patent describes a specific circuit design that includes a multiplexer, current polarity detection, comparison circuits, and bridge circuits to control motor operation. A key feature is the ability to determine whether to operate a low-side switch in a low-dropout linear regulation (LDO) mode based on input voltage, comparison signals, and polarity indications.

This patent grant is primarily an intellectual property notification and does not impose new regulatory obligations on businesses. However, companies involved in the design or manufacturing of motor driving circuits, particularly those utilizing similar technologies or operating within the battery and power management sectors, should be aware of this granted patent. It may impact their freedom to operate or necessitate licensing agreements if their products infringe upon the patented technology.

Source document (simplified)

← USPTO Patent Grants

Driving circuit for motor systems and control method thereof

Grant US12587115B2 Kind: B2 Mar 24, 2026

Assignee

Chengdu Monolithic Power Systems Co., Ltd.

Inventors

Hongqiang Qin, Qiming Zhao

Abstract

A driving circuit for a motor has a multiplexer, a current polarity detection circuit, a first comparison circuit, a reverse current control circuit, a first bridge circuit, and a second bridge circuit. The multiplexer chooses a voltage at a common node of two switches of the first bridge circuit or a voltage at a common node of two switches of the second bridge circuit as a chosen common node voltage based on a hall sensing signal. The comparison circuit provides a comparison signal by comparing the chosen common node voltage with an input voltage. The reverse current control circuit determines whether to control a low-side switch of the first bridge circuit or a low-side switch of the second bridge circuit to work in a low-dropout linear regulation (LDO) mode based on the comparison signal and a polarity indication signal provided by the current polarity detection circuit.

CPC Classifications

H01M 10/482 H01M 50/269 H02P 6/14 H02P 3/12 H02P 23/00 H02P 3/22 H02P 3/24 H02P 2207/03 H02P 3/14 H02P 6/24 H02P 9/02 H02P 2101/45 H02P 25/034 H02P 8/18 H02P 9/04 H02P 2209/07 H02P 25/188 H02P 6/34 H02P 7/281 H02P 9/107 H02P 9/14 H02P 9/30 H02P 9/48 H02P 23/0077 H02P 25/028 H02P 25/06 H02P 25/062 H02P 25/064 H02P 25/08 H02P 27/08 H02P 6/085