Calculation 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
- Highly-linear multiplier output with internal quantized voltage feed-forward correction for near-unity PF
- Extended range programmable frequency (10kHz to 300kHz)
- Programmable maximum duty-cycle clamp
- Programmable frequency dithering rate and magnitude for enhanced EMI reduction
- Magnitude: 3kHz to 30kHz
- Rate: Up to 30kHz
- External clock synchronization capability
- Enhanced load and line transient response through slew-rate correction of voltage amplifier output current
- 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 UCC28070A device is an extended-frequency-range derivative of the UCC28070 device, capable of operating at low switching frequencies desired for IGBT power-switch based PFC converters in high-power applications.
The UCC28070A device is capable of operating at frequencies from 10kHz to 300kHz, thus extending the range of operation compared to the UCC28070 device whose minimum operating frequency was limited to 30kHz. All the other features and benefits of the UCC28070 device are also available in the UCC28070A device. 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.
Like the UCC28070 device, the UCC28070A device also features multiple innovations including current synthesis and quantized voltage feedforward 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. All protection features in the UCC28070 device such as output overvoltage detection, programmable peak-current limit, undervoltage lockout, and open-loop protection are available in the UCC28070A device as well.
Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCC28070A Extended Frequency Range (10kHz to 300kHz), Interleaving Continuous Conduction Mode PFC Controller datasheet (Rev. B) | PDF | HTML | 08 Sep 2023 |
| 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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