Texas Instruments UCC28070PW, Power Factor Controller, 10 to 300 kHz, 21 V 20-Pin, TSSOP

From Texas Instruments, a range of Pulse Width Modulation controllers and associated devices to suit a variety of applications and specifications.

The Texas Instruments UCC28070 is an advanced power factor correction (PFC) device that integrates two pulse-width modulators (PWMs) operating 180° out of phase. This interleaved PWM operation generates substantial reduction in the input and output ripple currents, allowing the conducted-EMI filtering to become easier and less expensive. A significantly improved multiplier design provides a shared current reference to two independent current amplifiers that ensures matched average-current mode control in both PWM outputs while maintaining a stable, low-distortion, sinusoidal input-line current.

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
Programmable Frequency from 30 kHz to 300 kHz
Programmable Maximum Duty-Cycle Clamp
Programmable Frequency-Dithering Rate and
Magnitude for Enhanced EMI Reduction
Magnitude: 3 kHz to 30 kHz
Rate: Up to 30 kHz
External-Clock Synchronization Capability
Enhanced Load and Line Transient Response
through Voltage Amplifier Output Slew-Rate
Correction
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

PWM (Pulse Width Modulation) Controllers, Texas Instruments