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TPS65680: Can't write data to OTP memory

Part Number: TPS65680

Hi, All:

We meet a issue that can't write data to OTP memory.

But I2C interface is ok( can read and write to register) and we find OTP_LDO haven't output during programming OTP memory.

We make sure LS_CNTRL is low.

any possible cause make this issue?

If the root cause of write data to OTP memory fail is OTP_LDO damage, can we add an external 8 Volt power support to OTP_LDO pin?