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Valley switching boost power factor correction (PFC) reference design
TIDM-1022
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- Valley Switching Boost PFC Reference Design Using C2000™ MCU
(PDF 4897 KB)
03 Nov 2018
Description
This reference design illustrates a digital control method to significantly improve Boost Power Factor Correction (PFC) converter performance such as the efficiency and Total Harmonic Distortion (THD) under light load condition where efficiency and THD standards are difficult to meet. This is achieved using the integrated digital control feature of the Piccolo™ F280049 microcontroller (MCU). The design supports phase shedding, valley switching, valley skipping, and Zero Voltage Switching (ZVS) for different load and instantaneous input voltage conditions. The software available with this reference design accelerates time to market.
Features
- Interleaved, 750 W, Two-Phase Boost PFC Stage. Full Range Parameter: 95–260 Vrms, 47–63 Hz
- 200-kHz Switching Frequency Under Normal Conditions (Load > 10%)
- 140–330-kHz Variable Pulse Width Modulation (PWM) Switching Under Light Load (<10%)
- Programmable Valley Switching and Valley Skipping
- Low THD: 6% at 5% Load (Low Line); 7% at 5% Load (High Line)
- High Efficiency > 92% at 5% Load
See the Important Notice and Disclaimer covering reference designs and other TI resources.
