Wednesday, 15 January 2020

mosfet - What's the purpose of diode between high side and low side supply voltage of IR2110?


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What's the purpose of the diode between VCC and VB?



Answer



Vb is a charge boost converter to raise Vb above Vcc.



Thus the low side must use PWM to create a clock drive thru D to charge up C above Vcc so Vgs (high side) is positive for high side Nch switch.


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