UCC38085DR Datasheet PDF - TI

DESCRIPTION

●The UCC38083/4/5/6 is a family of BiCMOS pulse width modulation (PWM) controllers for dc-to-dc or off-line fixed-frequency current-mode switching power supplies. The dual output stages are configured for the push-pull topology. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 110 ns, limiting each output’s duty cycle to less than 50%.

●FEATURES

●Programmable Slope Compensation

●Internal Soft-Start on the UCC38083/4

●Cycle-by-Cycle Current Limiting

●Low Start-Up Current of 120 µA and 1.5 mA Typical Run Current

●Single External Component Oscillator Programmable from 50 kHz to 1 MHz

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

●Current Sense Discharge Transistor to Improve Dynamic Response

●Internally Trimmed Bandgap Reference

●Undervoltage Lockout with Hysteresis