UCC2897APW

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UCC2897APW

Advanced Current-Mode Active Clamp PWM Controller

Packaging

Package | PIN: PW | 20
Temp: Q (-40 to 125)
Carrier: Partial Tube
Qty Price
1-9 $3.05
10-24 $2.75
25-99 $2.56
100-249 $2.24
250-499 $2.10
500-749 $1.79
750-999 $1.51
1000+ $1.44

Features

  • Low-Output Jitter
  • Soft-Stop Shutdown of MAIN and AUX
  • 110-V Input Startup Function
  • Ideal for Active-Clamp, Reset-Forward, Flyback and Synchronous Rectifier Uses
  • Provides Complementary Auxiliary Driver with Programmable Dead Time (Turn-On Delay) between AUX and MAIN Switches
  • Peak Current-Mode Control with 0.5-V Cycle-by-Cycle Current Limiting
  • TrueDrive™ 2-A Sink, 2-A Source Outputs
  • Trimmed Internal-Bandgap Reference for Accurate Line UV and Line OV Threshold
  • Programmable Slope Compensation
  • High-Performance 1-MHz Synchronizable Oscillator with Internal Timing Capacitor
  • Precise Programmable Maximum Duty Cycle
  • PB-Free Lead Finish Package

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Texas Instruments  UCC2897APW

The 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.

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 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.