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Internal PWM Current Control. Each H-bridge is controlled by a fixed off time PWM current-control circuit that limits the load current to a desired value (ITRIP). Initially, a diagonal pair of source and sink outputs are enabled and current flows through the motor winding and Rs. When the voltage across the current-sense resistor equals the DAC output voltage, the current-sense comparator resets the PWM latch, which turns off the source driver (slow-decay mode) or the sink and source drivers (fast- or mixed-decay modes).: ]: c" n% o* e, I; v! f+ r
6 R6 ]2 y4 x w- g) {) j L7 `Rs = 75 ohm 怎麼來的？$ q+ [& @2 R$ o! T5 F
! [" }0 x$ f+ B* e1 t9 e' P電流夠嗎？
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发表于 2017-10-11 16:28
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发表于 2017-10-11 23:00
楼主
还可以这样
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