All trademarks are the property of their respective owners.
DescriptionThe UCC2897APWR PWM controller simplifies implementation of the various active clamp orreset and synchronous rectifier switching power topologies.
The UCC2897APWR is a peak current-mode fixed-frequency high-performance pulse-widthmodulator. The controller includes the logic and the drive capability for the P-channel auxiliaryswitch along with a simple method of programming the critical delays for proper active-clampoperation.
Features include an internal programmable slope compensation circuit, preciseDMAX limit, and a synchronizable oscillator with an internal-timingcapacitor. An accurate line-monitoring function also programs the ON and OFF transitions of theconverter with regard to the bulk input voltage, VIN.
The UCC2897APWR adds a second-level hiccup-mode current-sense threshold, bi-directionalsynchronization and input-overvoltage protection functionalities. The UCC2897APWR is offered in 20-pinTSSOP (PW) and 20-pin QFN (RGP) packages.
Feature
- Low-output jitter
- Soft-stop shutdown of MAIN and AUX
- 110-V input startupfunction
- Ideal for active-clamp, reset-forward, flyback and synchronousrectifier uses
- Provides complementary auxiliary driver with programmable deadtime (Turn-On Delay) between AUX and MAIN switches
- Peak current-mode controlwith 0.5-V cycle-by-cycle current limiting
- TrueDrive? 2-A Sink, 2-A source outputs
- Trimmedinternal-bandgap reference for accurate line UV and line OVthreshold
- Programmable slope compensation
- High-performance1-MHz synchronizable oscillator with internal timing capacitor
- Preciseprogrammable maximum duty cycle
- PB-free lead finishpackage
All trademarks are the property of their respective owners.
DescriptionThe UCC2897A PWM controller simplifies implementation of the various active clamp orreset and synchronous rectifier switching power topologies.
The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-widthmodulator. The controller includes the logic and the drive capability for the P-channel auxiliaryswitch along with a simple method of programming the critical delays for proper active-clampoperation.
include an internal programmable slope compensation circuit, preciseDMAX limit, and a synchronizable oscillator with an internal-timingcapacitor. An accurate line-monitoring function also programs the ON and OFF transitions of theconverter with regard to the bulk input voltage, VIN.
The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directionalsynchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pinTSSOP (PW) and 20-pin QFN (RGP) packages.
