OB2276 Series
High Performance Current Mode PWM Controller
OB2276 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications.
Features:
◆ Power on Soft Start Reducing MOSFET Vds Stress
◆ Frequency shuffling for EMI
◆ Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design
◆ Audio Noise Free Operation
◆ Fixed 65KHZ Switching Frequency
◆ Comprehensive Protection Coverage
◇ VDD Under Voltage Lockout with Hysteresis (UVLO)
◇ Cycle-by-cycle over current threshold setting for constant output power limiting over universal input voltage range
◇ Overload Protection (OLP) with auto-recovery
◇ Brownout Protection with auto-recovery
◇ Fixed VDD OVP with latch shut down
◇ Adjustable VDD OVP with latch shut down
◇ Over Temperature Protection with latch shut down
◇ Output Over Voltage Protection with latch shut down
◆ Available in SOP8 packages, RoHS compliant
Applications:
Offline AC/DC flyback converter for
◆ Battery Charger
◆ Power Adapter
◆ Set-Top Box Power Supplies
◆ Open-frame SMPS
Device
VDD OVP
OTP
Load OVP
OB2276
Latch
Latch
Latch
OB2276A
Auto-recovery
Auto-recovery
Auto-recovery
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