Hi, team.
A high-humidity/temperature test was performed by equipment with TPS65185.
The output voltage of VEE was -27V abnormally, therefore VEE_FB is about 1.3 V.
Where would it be broken?
BR
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Hi, team.
A high-humidity/temperature test was performed by equipment with TPS65185.
The output voltage of VEE was -27V abnormally, therefore VEE_FB is about 1.3 V.
Where would it be broken?
BR
Kobayashi-san,
Can you clarify if the device now regulates at -27V at room temperature, or if the device temporarily reached -27V during the HTOL tests? Were they able to confirm the voltage on VEE_FB while operating? How many devices have this behavior?
It should be very unlikely for only the negative charge pump reference to be affected.
Best Regards,
Rick S.
Rick-san,
The maximum output current value of VEE is 12mA.
When any more current is flowed, is there a possibility that CP2 breaks?
Does CP2 have a current limit protection?
Best Regards,
Kobayashi-san,
Both charge pumps have internal current limits, and I cannot determine how an overcurrent condition could lead to the behavior described.
Best Regards,
Rick S.