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See Technical Specifications

UCC28051DR +BOM

Transition mode PFC controller with 12.5V/9.7V UVLO and IEC61000-3-2 compliance, -40°C to 105

Manufacturer:

TI
Mfr.Part #:

UCC28051DR
Datasheet:

UCC28051DR Datasheet (PDF)
Topology:

Boost
Control mode:

TM
Switching frequency (max) (kHz):

200
UVLO thresholds on/off (V):

12.5/9.7
EDA/CAD Models:

Request Free CAD Models for UCC28051DR

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UCC28051DR General 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.

Key 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

Specifications

Topology	Boost	Control mode	TM
Switching frequency (max) (kHz)	200	UVLO thresholds on/off (V)	12.5/9.7
Vin (max) (V)	18	Features	Enable, Overvoltage protection, Peak current mode, Supports Flyback, Transition Control Mode
Rating	Catalog	Operating temperature range (°C)	-40 to 105
Duty cycle (max) (%)	99