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TL971: TL971 output decreased when connect to LDO

Kailyn Chen
Genius 9560 points
Part Number: TL971

Dear;  

When the TL971 doesn't connect TPS76301, the output of TL971 is normal, but when it connected to the input of TPS76301, the output of TL971 is decreased to 1V and its waveform is distortion. Could you please give me some advice? Please refer to the attached circuit.

Best regards

Kailyn

  • 0
    TI__Expert 6250 points
    Hi Kailyn,
    Please provide DC voltage measurements at MIC2+, VDD_6V, MIC1_OUT, U11 pin 3, and the op amp output in both configurations (these can be tested with no input signal). Additionally, oscilloscope images at these nodes in both configurations should help confirm the issue.