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Power dissipation?

Part Number: BQ51003
Other Parts Discussed in Thread: BQ500212A

I have an application which will be drawing roughly 50mW of power from a wireless charger, I'm trying to figure out how much power would be dissipated by the receiver. Using the figures in the datasheet I've been able to figure out that the system efficiency from transmitter input to receiver output will be roughly 5%. That's a 950mW power loss, but where? How much of that will actually be lost as heat on the receivers end.

  • Hello

    Almost all this power is dissipated on the transmitter side.  The BQ500212A (5V input 5W) transmitter input power will be about 1W with light load on the receiver.  Power is going into the drive section and coil to generate the AC filed.