AVR-Chat

At 03:24 PM 1/26/2004 +0800, Kathy Quinlan wrote:
>How about some of the dedicated driver chips like the IRL 6130

Pricey, but they work nicely.
Pay careful attention to bypassing and layout.

In my charger, I'm using such a driver. The T26 pumps out 500kHz PWM, and 
the driver snaps that monster fet on and off with edge rates approaching 
20-40 MHz.
That's quite a few amps for a few nS to charge the gate capacitance.

It's one happy fet though, at 20W output it's barely warm.
The inductor next to it is much warmer, but because of space constraints, 
there isn't much I can do there.