OB5222 is a highly integrated current mode PWM Power Switch with high voltage start up, optimized for high performance, low standby power consumption and cost effective offline flyback converter applications.PWM switching frequency at normal operation is internally fixed . At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Very low standby power consumption and very high conversion efficiency is thus achieved. Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique.
Features:
◆ Ultra Low Standby Power
◆ High Voltage Startup
◆ Power on Soft Start Reducing MOSFET Vds Stress
◆ Frequency shuffling for EMI
◆ Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power
◆ Audio Noise Free Operation
◆ Fixed 65KHZ Switching Frequency
◆ Comprehensive Protection Coverage
◇ VDD Under Voltage Lockout with Hysteresis (UVLO)
◇ Cycle-by-cycle over current protection (OCP)
◇ Overload Protection (OLP) with auto-recovery
◇ Over Temperature Protection (OTP) with latch shut down
◇ VDD Over voltage Protection(OVP) with latch shut down
◆ Available in DIP8 package, RoHS compliant
Applications:
Offline AC/DC flyback converter for
◆ PC/Sever Standby Power Supply
◆ LED TV Standby Power Supply
◆ Power Adaptor
◆ Open-frame SMPS
◆ STB Power Supply
◆ Set-Top Box Power Supply
Device | RDS(on) | Standby Power | Brownout | OB5222 | 5Ω | <30mW | -- | OB5225 | 2Ω | <30mW | Y |
Typical Application:
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