This post explains for the semiconductor 5H0165R.
The Part Number is KA5H0165R.
The function of this semiconductor is Power Switch(FPS).
Manufacturer: Fairchild Semiconductor
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Description
The Fairchild Power Switch(FPS) product family is specially designed for an off-line SMPS with minimal external components. The Fairchild Power Switch(FPS) consist of high voltage power SenseFET and current mode PWM IC.
Features
1. Precision Fixed Operating Frequency (100/67/50kHz )
2. Low Start-up Current (Typ. 100uA)
3. Pulse by Pulse Current Limiting
4. Over Load Protection Over Voltage Protection (Min. 25V) – except KA5H0165RVN
5. Internal Thermal Shutdown Function
6. Under Voltage Lockout
7. Internal High Voltage Sense FET
8. Auto-Restart Mode […]