Low Power Primary Switcher for Off Line SMPS

The HT7A6322 is highly functionally integrated low power primary switcher device which combines an integrated PWM controller with current mode control and a high voltage power MOSFET on the same silicon chip.

Features:

• Fixed 60kHz switching frequency
• 9V to 38V wide range VCC voltage
• Wide AC input range from 85VAC to 265VAC
• PWM with current mode control
• Auxiliary Under Voltage Lock Out with hysteresis
• High voltage start-up current source
• Excellent standby low power consumption
• Over-temperature, Over-current and Over-voltage protection with auto-restart
• Integrated 730V MOSFET
• Burst mode under low load conditions

Specification:

• topology: flyback (SSR), buck, buck-boost
• PF: <0.9
• standbay power: <100mW
• max. output power (110VAC/220VAC): 12W / 20W
• power MOSFET maximum voltage: 730V
• protection: OVP, OCP, In-OTP
• case: 8DIP