High mobility P-channel power metal oxide semiconductor field effect transistors.
高迁移率的P -沟道功率金属氧化物半导体场效应晶体管。
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When C4 does charge fully (the lower side reaches close to 0v), the P-channel MOSFET Q6 is turned on, effectively shorting out the motor, and acting as a brake.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators.