Product details


Topology Boost, Flyback, Forward Control mode Current Duty cycle (Max) (%) 50 Supply voltage (Max) (V) 12 UVLO thresholds on/off (V) 4.1/3.6 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Leading Edge Blanking, Multi-topology, Soft Start Operating temperature range (C) -40 to 85 Rating Catalog Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1 open-in-new Find other PWM controllers

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 TSSOP (PW) 8 19 mm² 3 x 6.4 open-in-new Find other PWM controllers


  • 100-µA typical starting supply current
  • 500-µA typical operating supply current
  • Operation up to 1 MHz
  • Internal soft start
  • Internal fault soft start
  • Internal leading-edge blanking of the current sense signal
  • 1-A totem-pole output
  • 70-ns typical response from current-sense to gate drive output
  • 1.5% tolerance voltage reference
  • Same pinout as UC3842 and UC3842A
open-in-new Find other PWM controllers


The UCC280x family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies with minimal parts count.

These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

open-in-new Find other PWM controllers

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 16
Type Title Date
* Data sheet UCC280x Low-Power BiCMOS Current-Mode PWM Controllers datasheet (Rev. G) May 12, 2020
Application note Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A) Jun. 11, 2021
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) Mar. 12, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers Feb. 07, 2002
Application note Differences Between the UCC3813 and the UCC3800 PWM Families Jun. 02, 2000
Application note DN-30 Programmable Electronic Circuit Breaker Sep. 05, 1999
Application note DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 Sep. 05, 1999
Application note DN-43 Simple Techniques to Generate a Negative Voltage Bias Supply Sep. 05, 1999
Application note DN-46 Highly Efficient Low Power DC to DC Inverter Converts +5V Input to -3V Out Sep. 05, 1999
Application note DN-48 Versatile Low Power SEPIC Converter Accepts Wide Input Voltage Range Sep. 05, 1999
Application note DN-54 Innovative Buck Regulator Uses High Side N-Channel Switch Without Complex Sep. 05, 1999
Application note DN-56A, Single Switch Flyback Circuit Converts + 5 V to +/- 12 V for RS-232/422 Sep. 05, 1999
Application note DN-65 Considerations in Powering BiCMOS ICs Sep. 05, 1999
Application note U-111, Practical Considerations in Current Mode Power Supplies Sep. 05, 1999
Application note U-133A UCC3800/1/2/3/4/5 BiCMOS Current Mode Control IC's Sep. 05, 1999

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SLUM081B.ZIP (88 KB) - PSpice Model
SLUM229.ZIP (28 KB) - TINA-TI Spice Model
SLUM230.TSC (668 KB) - TINA-TI Reference Design
SLUM231.TSC (667 KB) - TINA-TI Reference Design
SLUM516.ZIP (6 KB) - PSpice Model

Reference designs

3W Isolated Triple Output Flyback Converter Reference Design
PMP20852 — PMP20852 is an isolated flyback converter reference design with primary-side regulation using the UCC2805 controller IC. There are three independently isolated outputs on the secondary side, each of which use LP2951 linear regulators to provide a well-regulated 16V output on each of the three rails (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options
TSSOP (PW) 8 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​