A power MOSFET driving circuit
A driving circuit and power technology, applied in emergency protection circuit devices, output power conversion devices, electrical components, etc.
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[0012] Below in conjunction with accompanying drawing, the present invention will be further described
[0013] Fig. 1 is a structural block diagram of a power MOSFET driving circuit of the present invention. The input signal Vin is compared with the reference voltage Vref by the hysteresis comparator, and the logic control signal Vo1 is obtained by judgment. The drain terminal voltage Vdrain when the power MOSFET is turned on is introduced into the input terminal of the overcurrent protection circuit as an overcurrent detection, compared with the reference, and an overcurrent signal Vx is output. The logic control signal Vo1 controls the switching power stage together with the overcurrent signal Vx. When Vx is at a high level, the output of the switching power stage is at a low level, and the power MOSFET is turned off to realize over-current protection. When Vx is low level, the switching power stage output level logic is the same as the Vo1 signal.
[0014] Fig. 2 is a c...
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