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

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

Parametrics

Compare all products in Power factor correction (PFC) controllers Email Download to Excel
Part number Order 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 Order now Single-phase PFC     TM     15.8/9.7     18     4     0 to 70     Catalog     OVP
Transition Mode Control    
PDIP | 8
SOIC | 8    
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
UCC28050 Order now Single-phase PFC     TM     15.8/9.7     18     4     -40 to 85     Catalog     OVP
Supports Flyback
Transition Mode Control    
PDIP | 8
SOIC | 8    
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
UCC28051 Order now Single-phase PFC     TM     12.5/9.7     18     4     -40 to 105     Catalog     OVP
Supports Flyback
Transition Mode Control    
PDIP | 8
SOIC | 8    
See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
UCC28056 Order now Single-phase PFC     TM     10.65/8.85     34     2.2     -40 to 125     Catalog     < 150W Applications
Audible noise minimization circuitry
Low Power
OVP
Soft Start
Transition Mode Control    
SOT-23 | 6     6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    
UCC38051 Order now Single-phase PFC     TM     12.5/9.7     18     4     0 to 70     Catalog     OVP
Transition Mode Control    
SOIC | 8     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)