Current Mode Active Clamp PWM Controller

The UCC2891 2/3/4 family of PWM Controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.
The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width Modulator It includes the Logic and the drive capability for the auxiliary Switch with a simple method of programming the critical delays for proper active clamp operation.
The UCC2891 3 includes a 110-V start-up Regulator for initial start-up and to provide keep-alive power during stand-by.
Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable Oscillator An accurate line monitoring function also programs the converter?s ON and OFF transitions with regard to the bulk input voltage. Along with the UCC2897 this UCC289x family allows the power supply designer to eliminate many of the external components, reducing the size and complexity of the design.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
UCC2893DG4 Texas Instruments 2.5A SWITCHING CONTROLLER, 600kHz SWITCHING FREQ-MAX, PDSO16, GREEN, PLASTIC, SOIC-16
UCC2893PW Texas Instruments Current Mode Active Clamp PWM Controller 16-TSSOP -40 to 105
UCC2893PWG4 Texas Instruments Current Mode Active Clamp PWM Controller 16-TSSOP -40 to 105
UCC2893D Texas Instruments Current Mode Active Clamp PWM Controller 16-SOIC -40 to 85
UCC2893DRG4 Texas Instruments 2.5A SWITCHING CONTROLLER, 600kHz SWITCHING FREQ-MAX, PDSO16, GREEN, PLASTIC, SOIC-16
UCC2893DR Texas Instruments Current Mode Active Clamp PWM Controller 16-SOIC -40 to 85
UCC2893PWR Texas Instruments Current Mode Active Clamp PWM Controller 16-TSSOP -40 to 105
UCC2893PWRG4 Texas Instruments Current Mode Active Clamp PWM Controller 16-TSSOP -40 to 105
UCC2893 's PackagesUCC2893 's pdf datasheet
UCC2893D SOIC
UCC2893DG4 SOIC
UCC2893DR SOIC
UCC2893DRG4 SOIC
UCC2893PW TSSOP
UCC2893PWG4 TSSOP
UCC2893PWR TSSOP
UCC2893PWRG4 TSSOP




UCC2893 Pinout, Pinouts
UCC2893 pinout,Pin out
This is one package pinout of UCC2893,If you need more pinouts please download UCC2893's pdf datasheet.

UCC2893 Application circuits
UCC2893 circuits
This is one application circuit of UCC2893,If you need more circuits,please download UCC2893's pdf datasheet.


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