12-21-2013, 08:17 PM
One thing I have been thinking of is replacing the 3055's with IRF1010N power mosfets. The 3055's have a saturation voltage of over 1.1 V at a collector current of 4 Amps, which amounts to a lot of heat dissipation, more than 4 watts combined. The 1.1 V of drop also becomes pretty significant when you are starting out with only 6 V of supply.
The mosfets have an on resistance of only .011 Ohm, so total power dissipated drops to .176 watt at the same 4 A current. This is probably better than the original mechanical contacts as far as loss is concerned.
Might be worth giving a try...?
The mosfets have an on resistance of only .011 Ohm, so total power dissipated drops to .176 watt at the same 4 A current. This is probably better than the original mechanical contacts as far as loss is concerned.
Might be worth giving a try...?
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