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TPA301: High Start-up Current

Part Number: TPA301

Hi,

I am using the TPA301 as an amplifier for a low power application. The device consumes around 4 mA during transmission but I have noticed that when powering-up the device for first time it consumes around 20-30mA, then current decreases to normal values of ~1mA while idle. Is this normal operation? Am I missing something here? The configuration is shown below and operating with 2.8V supply.