3BR0665J 650V Power Supply Controller IC (Infineon)

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High-performance SMPS current-mode controller with integrated 650 V CoolMOS® and startup cell. Ideal for low power offline switch-mode power supply designs requiring low standby power, overcurrent protection, soft start, and jittered switching for EMI reduction. The ICE3BR0665J (CoolSET®-F3R) from Infineon is a fixed-frequency current mode controller tailored for offline SMPS (switched mode power supplies). It integrates a 650 V avalanche-rugged CoolMOS® transistor and startup cell into a DIP-8 package, reducing external component count while offering robust protection and efficiency features.

Key Features

  • Integrated 650 V CoolMOS® switch device

  • Fixed switching frequency: ~65 kHz

  • Active Burst Mode: ultra low standby power (typically < 50 mW)

  • Auto restart protection: overload, short circuit, overtemperature, overvoltage

  • Built-in soft start & blanking window with option to extend blanking period

  • External auto-restart enable pin for added control

  • Frequency jitter and soft gate driving to reduce EMI

  • Max duty cycle: ~75 %

  • Low tolerance current limit (±5 %)

  • RoHS compliant, lead-free plating


Key Specifications

Parameter Value / Range
Part Number ICE3BR0665J / 3BR0665J
Application Off-line SMPS current mode controller
Max Voltage (VDS) 650 V
Switching Frequency 65 kHz (fixed)
Max Output Power ~41 W (in typical designs)
Package DIP-8 (PG-DIP-8)
Protection Features Overload, OVP, overtemperature, auto-restart, current limiting
Standby Power < 50 mW (typical in burst mode)
Duty Cycle Up to ~75 %
Operating Temperature –40 °C to +105 °C (TA)