Calculation tool
SLUC114 — UCC28070 Excel Applications Design Tool
UCC28070x Excel Applications Design Tool
UCC28070A
Two-phase Interleaved CCM PFC controller with Extended Frequency Range (10kHz to 300kHz)
Data sheet
UCC28070A
- Interleaved average current-mode PWM control with inherent current matching
- Advanced current-synthesizer current sensing for superior efficiency
- Synchronization capability to external clock
- Highly-linear multiplier output with internal quantized voltage feed-forward for near-unity PF
- Enhanced transient response through slew-rate correction of voltage amplifier output current
- Extended-range programmable frequency
- UCC28070A: 10kHz to 300kHz
- UCC28070: 30kHz to 300kHz
- Programmable maximum duty-cycle clamp
- Programmable frequency-dithering rate and magnitude (up to 30kHz) for EMI reduction
- Programmable soft-start
- Programmable peak current limiting
- External PFC-disable interface
- Protections: bias-supply UVLO, output overvoltage, open‑loop detection, open-circuit detection on VSENSE and VINAC, and PFC-enable monitoring
The UCC28070A and UCC28070 are advanced power factor correction (PFC) controllers that each integrate two pulse-width modulators (PWMs) operating interleaved by 180° in CCM boost-mode. Both devices can switch at frequencies up to 300kHz, while the UCC28070A device is capable of operating down to 10kHz for IGBT power-switch based PFC converters in high-power applications. The minimum operating frequency of the UCC28070 device is limited to 30kHz.
The 180° out-of-phase interleaved operation generates substantial reduction in input and output ripple currents and conducted-EMI filtering becomes easier and less expensive. All the other features and benefits of the UCC28070A and UCC28070 devices are the same.
Both devices feature multiple innovations including current synthesis and quantized voltage feedforward to promote performance enhancements in PF, efficiency, THD, and transient response. In addition, frequency dithering, clock synchronization, and slew-rate enhancement further expand the potential for performance improvements. Also, protection features include output overvoltage detection, programmable peak-current limit, undervoltage lockout, and open-loop protection.
Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCC28070 and UCC28070A Extended Frequency Range (10kHz to 300kHz), Interleaving Continuous Conduction Mode PFC Controller datasheet (Rev. C) | PDF | HTML | 28 Jul 2025 |
| Product overview | PFC Controller Step-by-Step Selection Guide | PDF | HTML | 28 Feb 2023 | |
| Application note | UCC2806x PCB Layout Guideline for PFC | 29 Apr 2019 | ||
| White paper | Advancing Power Supply Solutions Through the Promise of GaN | 24 Feb 2015 | ||
| More literature | Design Review of a Full-Featured 350-W Offline Power Converter | 29 Oct 2013 | ||
| 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
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
Ordering & quality
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Support & training
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