Suddenly breakdown has occurred frequently with IC LOT No 71P2V4A / 77P1GHA.
In many cases, symptoms occur in 1 to 6 months.
Analysis was conducted
Destruction marks were confirmed in the circuit between PIN 3 (PH) and PN 4 (GND).
Short characteristics were confirmed between PIN 3 (PH) and PN 4 (GND).
It is designed to output up to 5 V 2 A by inputting 27.2 V normally.
What can be thought of as the cause of such destruction?
Thunder? Static electricity?
Can you give me some hints on solving this situation?
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