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What is the difference between high side driver & low side drivers..??

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A low side driver means driving the lower side MOSFET of a Hbridge, switching between 0 to 15 V is enough..
but the upper mosfet cant be driven with ordinary 15V from Gnd because its source terminal is doesnt connected with the GND. so it needs a floating drive(which gives the 15V between the source and Gate).
 
Re: What is the difference between high side driver & low side drivers..??

Moreover, to deliver the voltage that fires the gate of the high side fet, you normally will have to use a bootstrap capacitor to trap enough voltage and use it to fire between the gate and source of the high side fet.

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Re: What is the difference between high side driver & low side drivers..??

Fidelis Anyanti said:
Moreover, to deliver the voltage that fires the gate of the high side fet, you normally will have to use a bootstrap capacitor to trap enough voltage and use it to fire between the gate and source of the high side fet.

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Moreover, to deliver the voltage that fires the gate of the high side fet, you normally will have to use a bootstrap capacitor to trap enough voltage and use it to fire between the gate and source of the high side fet.
Click to expand...

what is bootstrap..??
how it can be designed..??
 

IR2110 is a bootstrap driver, it charges the capacitor when lower mosfet ON and use it when higher side is to be turned ON....
refer this document,
 

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Yes that is right, however, just to be specific, This is bootstrap Capacitor :
 

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