HT7A6312 Datasheet, PDF (1/10 Pages) Holtek Semiconductor Inc – Low Power Primary Switcher for Off Line SMPS

HT7A6312
Low Power Primary Switcher for Off Line SMPS
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
Applications
• Off line power supply for battery charger adapters
• Standby power supply for TV or monitors
• Auxiliary supply for motor control
• Air conditioner power supply
• Electromagnetic oven power supply
General Description
The HT7A6312 is highly functionally integrated
device which combines an integrated PWM controller
with current mode control and a high voltage power
MOSFET on the same silicon chip.
Typical Power Capability
Type
European (195~265VAC)
US (85~265VAC)
8SOP
8W
5W
8DIP
13W
8W
Typical Performance Characteristics Application Circuit
Isolation Flyback Topology
Snubber Circuit
Vac
VOUT+
VOUT-
SW _VCC
HT7A6312
VSS FB
PC817
TL 431
Rev. 1.00
1
December 24, 2014