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UCC28070
- Interleaved Average Current-Mode PWM Control
With Inherent Current Matching - Advanced Current Synthesizer Current Sensing
for Superior Efficiency - Highly-Linear Multiplier Output With Internal
Quantized Voltage Feed-Forward Correction for
Near-Unity PF - Programmable Frequency from 30 kHz to 300 kHz
- Programmable Maximum Duty-Cycle Clamp
- Programmable Frequency-Dithering Rate and
Magnitude for Enhanced EMI Reduction- Magnitude: 3 kHz to 30 kHz
- Rate: Up to 30 kHz
- External-Clock Synchronization Capability
- Enhanced Load and Line Transient Response
through Voltage Amplifier Output Slew-Rate
Correction - Programmable Peak Current Limiting
- Bias-Supply UVLO, Overvoltage Protection, Open-
Loop Detection, and PFC-Enable Monitoring - External PFC-Disable Interface
- Open-Circuit Protection on VSENSE and VINAC
pins - Programmable Soft-Start
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.
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Technical documentation
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View all 11 | 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 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
UCC28070EVM — UCC28070 Evaluation module
The UCC28070 evaluation module is a 300W, two-phase interleaved, PFC pre-regulator that uses average current mode control techniques to achieve near unity power factor. The pre-regulator was designed to operate off a universal ac line input of 85V to 265V and provides a regulated 390V dc output. (...)
User guide: PDF
Simulation model
UCC28070 PSpice Start-up Simulation Using Average Model
SLUM097.ZIP (76 KB) - PSpice Model
Simulation model
UCC28070 TINA-TI Start-up Simulation Using Average Model
SLUM328.TSC (813 KB) - TINA-TI Reference Design
Reference designs
PMP40261 — 800-W High efficiency bridgeless Power Factor Correction (PFC) reference design
This reference design is a bridgeless PFC circuit using UCC28070 Interleaving CCM PFC controller to provide 390-V /2-A output from universal AC input. The circuit uses Average Current Mode PWM control with advanced internal current synthesizer for current sensing. This design achieves 96.57% peak (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (DW) | 20 | Ultra Librarian |
| TSSOP (PW) | 20 | Ultra Librarian |
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