This post explains for the semiconductor 3BR1065JF.
The Part Number is ICE3BR1065JF.
The function of this semiconductor is Current Mode PWM Controller IC for SMPS Jitter version 650V.
The package : TO-220 Type
Manufacturer: Infineon Technologies
Preview images :
The CoolSET -F3R FullPak is the enhanced version of CoolSET-F3 and targets for the Off-Line Adapters and high power range SMPS in DVD R/W, DVD Combi, set top box, etc. It has a wide Vcc range to 25V by adopting the BiCMOS technology. With the merit of Active Burst Mode, it
can achieve the lowest Standby Power Requirements (<100mW) at no load and Vin = 270VAC. […]
1. 650V avalanche rugged CoolMOS® with built-in Startup Cell
2. Active Burst Mode for lowest Standby Power
3. Fast load jump response in Active Burst Mode
4. 67kHz internally fixed switching frequency