It says that it can be powered from 10 to 30 volts.Could I use a power supply I have that is 32 volts at 2.5 amps? or will that be too much for it to handle even with an added heat sink to the IC?
The datasheet says that the absolute maximum voltage that this amplifier IC can be run at is 36V, so in theory you should be ok as long as the IC stays cool. Generally the recommended operating voltage is lower than the absolute maximum voltage listed on the datasheet to take into account variations from one chip to another, and to account for the fact that the IC will warm up with use, which will make the IC more susceptible to frying from a voltage that is near its absolute maximum rating.If I were you I would probably use this power supply, mainly for 3 reasons:1. You already have it2. 32V is still fairly far away from the abs max of 36V, so it should be safe.2. The actual power output you'll get from this amplifier depends on the power supply voltage you use. Voltages near the low end of its recommended range (10V) will produce extremely low power levels, and you'll only get the advertised level of 2x15W if you use a power supply of 30V. According to the datasheet, a 10V supply will give 2W in an 8ohm load, and a 30V supply will give 15W in an 8ohm load.Two things to note though:1. Before actually power this amp with the 32V supply, make sure the supply is actually putting out 32V, and not something higher. Some power supplies output a voltage a little different from what they're rated at, so if this power supply is actually putting out, say, 35V (which is unlikely), then I'd recommend not using it for the amp. Also, monitor its voltage when using the amp, to make sure everything's still fine.2. If you do use this power supply, use a good-sized heatsink! Also, heatsink grease would be good.Also, you probably already realize this, but that power supply's current rating should be plenty to power this amp. I have a Sure 2x25W amp, and it works fine with a 30V, 2.5A supply, even when sinewave-testing both channels at the same time at full power with 4ohm loads. So, your supply's max current output of 2.5A should be plenty for this 2x15W amp.
Date published: 2012-08-23