making a light with pwm driver.
1. is total watts all that matters when sizing heatsink?
as supply voltage goes up, current goes down and vice versa, so watts stay the same.
if the number of LEDs change, and watts stays the same, is the same amount of heat generated?
2. when supply voltage is in normal range, total current on my reverse polarity protection diode is .9amp. if voltage drops, current goes to 1.2amp before decreasing when voltage drops too low. should i use a 2amp diode?
thanks
1. is total watts all that matters when sizing heatsink?
as supply voltage goes up, current goes down and vice versa, so watts stay the same.
if the number of LEDs change, and watts stays the same, is the same amount of heat generated?
2. when supply voltage is in normal range, total current on my reverse polarity protection diode is .9amp. if voltage drops, current goes to 1.2amp before decreasing when voltage drops too low. should i use a 2amp diode?
thanks