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
