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Product details

Parameters

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

Features

  • 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
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Description

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.

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Technical documentation

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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

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

Reference designs

REFERENCE DESIGNS Download
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

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  • Qualification summary
  • Ongoing reliability monitoring

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