The UCC28070 is an advanced power factor correction (PFC) device that integrates two pulse-width modulators (PWMs) operating 180° out of phase. This interleaved PWM operation generates substantial reduction in the input and output ripple currents, allowing the conducted-EMI filtering to become easier and less expensive. A significantly improved multiplier design provides a shared current reference to two independent current amplifiers that ensures matched average-current mode control in both PWM outputs while maintaining a stable, low-distortion, sinusoidal input-line current.
The UCC28070 device contains multiple innovations including current synthesis and quantized voltage feed-forward to promote performance enhancements in PF, efficiency, THD, and transient response. Features including frequency dithering, clock synchronization, and slew rate enhancement further expand the potential performance enhancements.
The UCC28070 device also contains a variety of protection features including output-overvoltage detection, programmable peak-current limit, undervoltage lockout, and open-loop protection.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCC28070 Interleaving Continuous Conduction Mode PFC Controller datasheet (Rev. F) | PDF | HTML | 18 Apr 2016 |
| Application note | UCC2806x PCB Layout Guideline for PFC | 29 Apr 2019 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Technical article | Are you on-board? Demystifying EV charging systems | PDF | HTML | 31 Jul 2017 | |
| Technical article | Is PFC possible without input voltage sensing? | PDF | HTML | 14 Sep 2016 | |
| Technical article | Staying cool, efficiently | PDF | HTML | 22 Aug 2016 | |
| White paper | An Interleaved PFC Preregulator for High-Power Converters | 28 Apr 2015 | ||
| More literature | Design Review of a Full-Featured 350-W Offline Power Converter | 29 Oct 2013 | ||
| Application note | UCC28070 300W Interleaved PFC Pre-regulator Design Review (Rev. B) | 08 Jul 2010 | ||
| Application note | UCC28070 Implement Bridgeless PFC Pre-Regulator Design | 18 Jun 2009 | ||
| User guide | UCC28070, 300-W Interleaved PFC Pre-Regulator (Rev. B) | 12 May 2009 |
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