MC33035 over-current protection circuit diagram

Published:2011/7/28 21:32:00 Author:Ecco | Keyword: over-current protection circuit | From:SeekIC

MC33035 overcurrent protection circuit is shown as the chart. MC33035 uses the external inverter to be grounded by resistor RS for the current sampling. Sampling voltage is input to the current sense comparator by pin 9 and pin 15. Inverting input of the comparator (pin 15) is set a 100mV reference voltage, which is used as the current limit ing benchmark. In the oscillator sawtooth rising time, if the current is too large, the comparator will flip so that the next RS flip-flop resets and closes the driven output to limit the current from continuing increase.



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