UCC28050
Transition mode PFC controller with 15.6V/9.7V UVLO and IEC61000-3-2 compliance, -40°C to 105°C
UCC28050
- 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
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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | UCC2805x, UCC3805x Transition Mode PFC Controller datasheet (Rev. G) | PDF | HTML | 05 May 2015 |
User guide | PR320 UCC28050 100-W PFC Ballast Pre-Regulator | 16 Aug 2004 | ||
Application note | UCC38050 100W Critical Conduction (PFC) Reference Design (Rev. A) | 03 May 2004 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
UCC28051EVM — UCC28051 Evaluation Module
PMP11155 — Universal AC Input, 24V/1A PFC-Flyback Reference Design
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
PDIP (P) | 8 | Ultra Librarian |
SOIC (D) | 8 | Ultra Librarian |
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