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.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | UCC2805x, UCC3805x Transition Mode PFC Controller datasheet (Rev. G) | PDF | HTML | May 5, 2015 |
| Technical article | Is PFC possible without input voltage sensing? | PDF | HTML | Sep 14, 2016 | |
| Analog design Journal | Analog Applications Journal 4Q 2014 | Oct 24, 2014 | ||
| Analog design Journal | Design a transition-mode, bridgeless PFC with a standard PFC controller | Oct 24, 2014 | ||
| Application note | High-Efficiency AC-DC TV Power Solutions: An Intelligent LED Backlight Scheme | Jul 15, 2011 | ||
| User guide | UCC28600 120-W Evaluation Module User's Guide (Rev. A) | Oct 19, 2006 | ||
| User guide | PR320 UCC28050 100-W PFC Ballast Pre-Regulator | Aug 16, 2004 | ||
| Application note | UCC38050 100W Critical Conduction (PFC) Reference Design (Rev. A) | May 3, 2004 | ||
| User guide | 100-W Universal Line Input PFC Boost Converter (Rev. A) | Feb 3, 2004 |
For additional terms or required resources, click any title below to view the detail page where available.
MathCAD application design tool for use with the UCC38050.
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| PDIP (P) | 8 | Ultra Librarian |
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