Other Parts Discussed in Thread: TPS60400
Hi Experts:
Please see the schematic below, my customer is using the LM2776 to convert from 5V to -5V ,which is for the amplifier's bias.
the LM2776 could work normally if we increasing the ambient temperature from 25degree to 60degree.
However, The LM2776 can't start working if we turn off and turn on input power in the case of 60degree.
We check the fly cap and input/output cap , there are all X7R.
We also capture the waveform of Vout, C+/C- , could you please help on it ? it seems some protection take effect to block the device working.