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Texas Instruments UCC28050 | Demoboard PMP11155
Transition mode PFC controller with 15.6V/9.7V UVLO and IEC61000-3-2 compliance 0°C to 70°C
Overview
| Topology | Power Factor Correction |
| Input voltage | 90-265 V |
| Output 1 | 24 V / 1 A |
| IC revision | C |
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
Typical applications
- Single-Stage PFC Flyback Converters for Lighting and Motor Drives, AC Adapter Front-End Power Supplies, Electronic Ballasts
- Switch-Mode Power Supplies for Desktops, Monitors, TVs, and Set Top Boxes (STBs)
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | VR(V (AC)) | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | L(mm) | W(mm) | H(mm) | Packaging | L(µH) | IRP,40K(A) | ISAT(A) | RDC max.(mΩ) | fres(MHz) | Size | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTXX Film Capacitors, Across the mains, 470 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTXX Film Capacitors | Capacitance470 nF | Rated Voltage310 V (AC) | Safety ClassX2 | Rate of Voltage Rise220 V/µs | Dissipation Factor0.1 % | Insulation Resistance21.28 GΩ | Pitch15 mm | Length18 mm | Width8 mm | Height14 mm | PackagingCarton | – | – | – | – | – | SizePitch 15 mm | – | ||||
 | WE-PD SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | – | – | – | – | – | – | – | Length12 mm | Width12 mm | Height6 mm | – | Inductance470 µH | Performance Rated Current1.25 A | Saturation Current0.8 A | DC Resistance710 mΩ | Self Resonant Frequency2.6 MHz | Size1260 | VersionStandard |