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US 11,539,312 B2Granted
Motor driver and motor driving system
AssigneeRohm Co., Ltd.
InventorsTetsuo Yamato, Noboru Takizawa
Life of this patent
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Abstract
The present invention provides a motor driver and a motor driving system capable of suppressing power consumption when a motor is in a brake state. The motor driver of the present invention includes: a half-bridge power output section, including a high-side transistor and a low-side transistor; a high-side driving circuit, driving the high-side transistor; and a control portion. When switching to a brake mode, the low-side transistor is turned on and the control portion turns off the high-side driving circuit.
Claims19
A motor driver, comprising:
- a half-bridge power output section, including a high-side transistor and a low-side transistor;
- a low-side driving circuit operable to drive the low-side transistor;
- a high-side driving circuit operable to drive the high-side transistor;
- a control portion;
- a driving signal generating portion, different from the high-side driving circuit and the low-side driving circuit of the motor driver, operable to transmit a control terminal driving signal to a control terminal of the low-side transistor;
- and
- a brake terminal, being a dedicated external terminal, operable to receive a brake signal operable to provide an instruction for switching to the brake mode;
- wherein when switching to a brake mode, the low-side transistor is turned on and the control portion turns off the high-side driving circuit, and
- wherein when the brake signal is inputted to the brake terminal, the driving signal generating portion is operable to generate the control terminal driving signal for turning on the low-side transistor, and the control portion is operable to turn off the low-side driving circuit.
6 more elements
Dependencies are inferred from the claim text.