UCC28050

ACTIVE

Transition mode PFC controller with 15.6V/9.7V UVLO and IEC61000-3-2 compliance, -40°C to 105°C

Product details

Vin (max) (V) 18 Operating temperature range (°C) -40 to 105 Control mode TM Topology Boost, PFC controller Rating Catalog Features Enable, Overvoltage protection, Peak current mode, Single-phase, Supports Flyback, Transition Control Mode Duty cycle (max) (%) 99
Vin (max) (V) 18 Operating temperature range (°C) -40 to 105 Control mode TM Topology Boost, PFC controller Rating Catalog Features Enable, Overvoltage protection, Peak current mode, Single-phase, Supports Flyback, Transition Control Mode Duty cycle (max) (%) 99
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Transition Mode PFC Controller for Low Implementation Cost
  • Industry Pin Compatibility With Improved Feature Set
  • Improved Transient Response With Slew-Rate Comparator
  • Zero Power Detect to Prevent Overvoltage Protection (OVP) During Light Load Conditions
  • Accurate Internal VREF for Tight Output Regulation
  • Two UVLO Options
  • OVP, Open-Feedback Protection, and Enable Circuits
  • ±750-mA Peak Gate Drive Current
  • Low Start-Up and Operating Currents
  • Lead (Pb)-Free Packages
  • Transition Mode PFC Controller for Low Implementation Cost
  • Industry Pin Compatibility With Improved Feature Set
  • Improved Transient Response With Slew-Rate Comparator
  • Zero Power Detect to Prevent Overvoltage Protection (OVP) During Light Load Conditions
  • Accurate Internal VREF for Tight Output Regulation
  • Two UVLO Options
  • OVP, Open-Feedback Protection, and Enable Circuits
  • ±750-mA Peak Gate Drive Current
  • Low Start-Up and Operating Currents
  • Lead (Pb)-Free Packages

The UCC38050 and UCC38051 are PFC controllers for low-to-medium power applications requiring compliance with IEC 1000-3-2 harmonic reduction standard. The controllers are designed for a boost preregulator operating in transition mode (also referred to as boundary-conduction mode or critical conduction-mode operation). They feature a transconductance voltage amplifier for feedback error processing, a simple multiplier for generating a current command proportional to the input voltage, a current-sense (PWM) comparator, PWM logic, and a totem-pole driver for driving an external FET.

In the transition mode operation, the PWM circuit is self-oscillating, with the turnon being governed by an inductor zero-current detector (ZCD pin), and the turnoff being governed by the current-sense comparator. Additionally, the controller provides features such as peak current limit, default timer, overvoltage protection (OVP) and enable.

The UCC38050 and UCC38051 are PFC controllers for low-to-medium power applications requiring compliance with IEC 1000-3-2 harmonic reduction standard. The controllers are designed for a boost preregulator operating in transition mode (also referred to as boundary-conduction mode or critical conduction-mode operation). They feature a transconductance voltage amplifier for feedback error processing, a simple multiplier for generating a current command proportional to the input voltage, a current-sense (PWM) comparator, PWM logic, and a totem-pole driver for driving an external FET.

In the transition mode operation, the PWM circuit is self-oscillating, with the turnon being governed by an inductor zero-current detector (ZCD pin), and the turnoff being governed by the current-sense comparator. Additionally, the controller provides features such as peak current limit, default timer, overvoltage protection (OVP) and enable.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Similar functionality to the compared device
UCC28056 ACTIVE 6-pin high performance CRM/DCM PFC controller Lower standby, fewer pins, simpler magnetics design, improved noise immunity, and long-term supply on newer technology process

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 3
Type Title Date
* Data sheet UCC2805x, UCC3805x Transition Mode PFC Controller datasheet (Rev. G) PDF | HTML 05 May 2015
User guide PR320 UCC28050 100-W PFC Ballast Pre-Regulator 16 Aug 2004
Application note UCC38050 100W Critical Conduction (PFC) Reference Design (Rev. A) 03 May 2004

Design & development

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

Evaluation board

UCC28051EVM — UCC28051 Evaluation Module

UCC28051 Evaluation Module is a 100-W offline AC-DC voltage converter with power factor correction (PFC). The power module was designed to show how the UCC28051 could be configured in an off-line power factor corrected preregulator. The module was designed to operate over a universal input range (...)
User guide: PDF
Not available on TI.com
Calculation tool

UCC38050-CALC — MathCAD Calculation Tool for UCC38050 Transition Mode PFC Controller

MathCAD application design tool for use with the UCC38050.
Reference designs

PMP11155 — Universal AC Input, 24V/1A PFC-Flyback Reference Design

This UCC28050-based reference design provides both isolation and power factor correction in a single stage.  The circuit is built on a 76mm by 50mm, two layer board.  The test report documents performance with regards to efficiency, power factor, thermal, EMI, and more.
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian

Ordering & quality

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

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. ​​​​​​​​​​​​​​

Videos