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OP07C: OP07C做跟随器使用时,先接外部模拟信号(电压),后供电,导致供电模块(DCDC模块)过载保护的原因

Part Number: OP07C

OP07C做跟随器使用时,先接外部模拟信号(电压),后供电(双电源供电±15V),供电为隔离DCDC模块(带过载保护功能),导致DCDC模块过载保护,无法启动。而且只有接入负信号且达到一定幅值时才会出现,想知道导致电源过载保护的原因?

1.运放EOS过应力?

2.先接外部信号,后供电,导致运放内部有低阻抗路径,电源模块过流?低阻抗路径形成的原因?

3.如果不用有过载保护的DCDC,运放是否就烧坏了?

电路如图所示: