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UCC28089DTI/UNITRODEN/a9avaiPrimary Side Push-Pull driver with Dead-time Control
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UCC28089D-UCC28089DR
Primary Side Push-Pull driver with Dead-time Control
UCC28089
SLUS623A-- SEPTEMBER 2004-- REVISED AUGUST 2006
PRIMARY-SIDE PUSH-PULL OSCILLATORWITH DEAD-TIME CONTROL
FEATURES
Push-Pull Oscillator With ProgrammableDeadtime High-Current Totem-Pole Dual Output StageDrives Push-Pull Configuration with 1-A Sinkand 0.5-A Source Capability Can be Usedin Push-Pull, Half-Bridge,orFull-Bridge Topologies Oscillator Synchronization Output Low Start-Up Currentof 130 μAand 1.4-mATypical Run Current Over-Current Shutdown Digitally Controlled Over-Current/RetryFeature Undervoltage Lockout With Hysteresis
APPLICATIONS
High Efficiency Cascaded Converters Inverters Electronic Ballasts Uninterruptable Power Supplies (UPS) ACor DC Links
DESCRIPTION

The UCC28089isa versatile BiCMOS controller fordc-to-dcor off-line fixed-frequency switching powersupplies. The UCC28089 has dual alternating outputstagesin dual-alternating push-pull configuration. Bothoutputs switchat half the oscillator frequency usingatoggle flip-flop and dutycycleis limitedtoless than 50%.
TYPICAL APPLICATION

UDG-04112
VIN =48V
VO=1.2V+
Pleasebe awarethat animportant noticeconcerning availability, standardwarranty,and usein critical applicationsof Texas Instruments
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