UCC28089DR Datasheet PDF - TI

●DESCRIPTION

●The UCC28089 is a versatile BiCMOS controller for dc-to-dc or off-line fixed-frequency switching power supplies. The UCC28089 has dual alternating output stages in dual-alternating push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop and duty cycle is limited to less than 50%.

●FEATURES

●• Push-Pull Oscillator With Programmable Deadtime

●• High-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source Capability

●• Can be Used in Push-Pull, Half-Bridge, or Full-Bridge Topologies

●• Oscillator Synchronization Output

●• Low Start-Up Current of 130 μA and 1.4-mA Typical Run Current

●• Over-Current Shutdown

●• Digitally Controlled Over-Current/Retry Feature

●• Undervoltage Lockout With Hysteresis

●APPLICATIONS

●• High Efficiency Cascaded Converters

●• Inverters

●• Electronic Ballasts

●• Uninterruptable Power Supplies (UPS)

●• AC or DC Links