Texas Instruments UCC28051D | Demoboard PMP9730

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 CostIndustry Pin Compatibility With Improved Feature SetImproved Transient Response With Slew-Rate ComparatorZero Power Detect to Prevent Overvoltage Protection (OVP) During Light Load ConditionsAccurate Internal VREF for Tight Output RegulationTwo UVLO OptionsOVP, Open-Feedback Protection, and Enable Circuits±750-mA Peak Gate Drive CurrentLow Start-Up and Operating CurrentsLead (Pb)-Free Packages

More information

• Datasheet
• IC product information