UCC28070PW

Overview

The UCC28070PW is a two-phase interleaved continuous conduction mode (CCM) power factor correction controller manufactured by Texas Instruments. It operates within a supply voltage range of 11V to 21V and supports switching frequencies from 30 kHz to 300 kHz. The device features a maximum duty cycle of 95% and a peak current limit capability. Designed for high-efficiency applications, it achieves a power factor rating greater than 0.9. The component is housed in a TSSOP-20 package and functions reliably across an operating temperature range of -40°C to 125°C.

Feature Summary

• Integrates two PWM controllers operating 180 degrees out of phase to significantly reduce input and output ripple currents.
• Utilizes advanced current synthesizer technology for superior efficiency and accurate current sensing.
• Provides highly linear multiplier output with internal voltage feed-forward correction for near unity power factor.
• Includes programmable frequency dithering to reduce electromagnetic interference and phase management for light-load operation.

Applications

• Multi-kilowatt communications systems
• Server power supplies
• Industrial system power management

Procurement Notes

Verify the specific suffix 'PW' confirms the TSSOP-20 tube packaging variant rather than the tape-and-reel version. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the ordering part number matches the required temperature grade and package style for your design specifications.

Selection Notes

Select this controller for designs requiring interleaved PFC to minimize filter size and improve thermal performance. It is suitable for applications needing average current mode control with high linearity. Consider the programmable frequency range when designing magnetic components. Evaluate the need for external clock synchronization if precise timing alignment is required.

Part Context

This component belongs to the UCC28070 family of single-chip interleaved PFC controllers. It is designed to simplify power design for multi-kilowatt systems while increasing reliability. The device represents a solution for improving energy efficiency in commercial and industrial power conversion applications through advanced control algorithms.

Replacement Considerations

Public confirmed substitute part numbers include UCC28060 for lower power applications and UCC28070DWR for SOIC package compatibility. Verify pinout and functional equivalence before substitution.

FAQ

What is the purpose of the interleaved PWM operation?

The interleaved PWM operation generates significantly reduced input and output ripple currents, allowing for simpler and more cost-effective EMI filtering.

How does the device handle light-load conditions?

It provides phase management capabilities that allow the system to dynamically adjust operating phases based on load demand, enhancing efficiency at light loads.