First, I made a mistake on the hard and soft switching statement. You were correct in the way your schematic showed, the PWM on the high side. Hard switching is when you switch both high and low at the same time. When using a half-bridge driver the PWM switching of the high side will allow the recharging of the boot strap capacitor. This is needed to keep the motor on for long times of use.Hi shortbus, thank you for the reply.
I went through the HS and LS concept and as I understood it, to switch ON the LS mosfet you need the specifiied Vgs value which in this case is about 10V. To switch ON the HS mosfet you need that 10V(Vgs) plus the supply voltage to the H bridge. Am I correct ?
There is another thing which is, all these drivers come with a specified output current. I'm assuming it is the current needed to charge and discharge the gate at high frequencies. How do I calculate it for my application. The PWM frequency is about 10kHz.
Regards
by Aaron Carman
by Jake Hertz
by Aaron Carman
by Jake Hertz