UCC38050 Transition Mode PFC Controller | TI.com

UCC38050 (ACTIVE)

Transition Mode PFC Controller

 

Description

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.

Features

  • 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

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Parametrics Compare all products in Power factor correction (PFC) controllers

 
Device type
Control method
UVLO thresholds on/off (V)
Operating supply (Max) (V)
Operating supply current (mA)
Operating temperature range (C)
Rating
Features
Package Group
Package size: mm2:W x L (PKG)
UCC38050 UCC28050 UCC28051 UCC28056 UCC38051
Single-phase PFC     Single-phase PFC     Single-phase PFC     Single-phase PFC     Single-phase PFC    
TM     TM     TM     TM     TM    
15.8/9.7     15.8/9.7     12.5/9.7     10.65/8.85     12.5/9.7    
18     18     18     34     18    
4     4     4     2.2     4    
0 to 70     -40 to 85     -40 to 105     -40 to 125     0 to 70    
Catalog     Catalog     Catalog     Catalog     Catalog    
OVP
Transition Mode Control    
OVP
Supports Flyback
Transition Mode Control    
OVP
Supports Flyback
Transition Mode Control    
< 150W Applications
Audible noise minimization circuitry
Low Power
OVP
Soft Start
Transition Mode Control    
OVP
Transition Mode Control    
PDIP | 8
SOIC | 8    
PDIP | 8
SOIC | 8    
PDIP | 8
SOIC | 8    
SOT-23 | 6     SOIC | 8    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)    
6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)     8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)    

Design tool

WEBENCH® Designer UCC38050

AC Frequency  60 Hz  50 Hz
  Min   Max Range
VinRMS  V 70.0 to 300.0V
Vout  V 110 to 450V
Iout  A ≤ 1A
Ambient Temp  °C 0 to 70°C