I have a ATMEGA8L-8PU operating at 5V controlling multiple IR LEDs which are used for transmitting instructions. The signal frequency is roughly 100 kHz. The LEDs are currently hooked up via an ULN2803, but it does not meet my current requirements. I need about 10A at 12V.
What would be the easiest way to increase power output?
One approach would be to replace the ULN with something like IRFZ44E which I have lying around. But my partner who will be doing the actual soldering has reservations about messing about near the microcontroller and would prefer to use the ULN as additional protection. That comes with its own set of issues, though.
How would I go about inverting the drain of the ULN to source so I can drive something bigger?
Do you guys have a suggestion?