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Old 15th March 2010, 09:42 PM   #1
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Default TDA1543 power consumption

I'm using 8xTDA1543 from 7V power supply and the current consumption is ~ 600 mA. This means ~ 75 mA per chip. I think it is too high as datasheet shows 50-60 mA so I would expect somethingf like ~ 400 mA. Is it normal?
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Old 18th March 2010, 04:51 PM   #2
Joris is offline Joris  Netherlands
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Quote:
Originally Posted by vcelkamaja View Post
I'm using 8xTDA1543 from 7V power supply and the current consumption is ~ 600 mA. This means ~ 75 mA per chip. I think it is too high as datasheet shows 50-60 mA so I would expect somethingf like ~ 400 mA. Is it normal?
Well, since they usually work at around 5 volts, the current at 7 volts will be higher. So, it is normal. When they're getting too hot, cool them with a heatsink or something similar...
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