Calculation tool
SLUC114 — UCC28070 Excel Applications Design Tool
UCC28070x Excel Applications Design Tool
Data sheet
UCC28070
- 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.
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Technical documentation
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View all 11 Design & development
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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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