UCC28070PWR

Overview

The UCC28070PWR is a two-phase interleaved continuous conduction mode (CCM) power factor correction controller manufactured by Texas Instruments. It integrates two pulse width modulators operating with a 180-degree phase shift to significantly reduce input and output ripple currents, simplifying EMI filter design. The device operates within a switching frequency range of 30 kHz to 300 kHz and supports external clock synchronization. It features programmable maximum duty cycle clamping, frequency dithering for EMI reduction, and advanced current synthesizer sensing. The component is housed in a TSSOP-20 package, supports surface mount installation, and functions across an operating temperature range of -40°C to +125°C.

Feature Summary

• Interleaved average current-mode PWM control with inherent current matching between phases
• Advanced current synthesizer sensing architecture for superior efficiency
• Highly-linear multiplier output with internal quantized voltage feed-forward correction
• Programmable frequency dithering rate and magnitude for enhanced EMI reduction

Applications

• Air conditioners and white goods control systems
• High-efficiency server and desktop power supplies
• Telecom rectifiers
• Industrial equipment requiring near-unity power factor

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the TSSOP-20 tape and reel packaging configuration. Confirm that the required switching frequency falls within the standard 30 kHz to 300 kHz operational range defined for this variant. Ensure compatibility with the UCC28070EVM development kit if prototyping. Check for RoHS compliance status in the latest manufacturer documentation before finalizing procurement orders.

Selection Notes

Select this component when designing high-power PFC stages requiring reduced input ripple and simplified EMI filtering through interleaving. It is suitable for applications utilizing IGBT power switches or where extended frequency programmability is necessary. Consider the TSSOP-20 thermal characteristics and the 800 mW power dissipation limit during thermal management planning. Verify that the system requirements align with the available protection features such as UVLO and open-loop detection.

Part Context

This part belongs to the UCC28070 family of power factor correction controllers. It serves as a derivative designed for two-phase interleaved CCM applications. The family includes variants like the UCC28070APWR which extends the low-frequency operation down to 10 kHz for specific IGBT-based converters. The UCC28070PWR represents the standard commercial grade version optimized for general high-efficiency power supply designs.

Replacement Considerations

The UCC28070PW is a pin-compatible alternative packaged in a tube instead of a reel. The UCC28070DW and UCC28070DWR are SOIC-20 package equivalents offering similar electrical performance with different physical dimensions.