Design
Industrial 500W AC/DC reference design provides 94.5% efficiency
This reference design from Texas Instruments is a compact, high efficiency, 24V DC, 500W reference design for industrial AC/DC power supplies. This design consists of a front-end, two-phase interleaved transition mode (TM) power factor correction (PFC) based on the UCC28064A. This minimises the PFC inductor size and reduces EMI filter requirements.
The DC/DC is implemented using the HB-LLC stage implemented using TI's UCC256301 device. For efficiency improvement, synchronous rectification is used at secondary which uses the UCC24612.
Features
- Overall efficiency of 94.5% at full load with peak efficiency > 95%.
- Up to 330W operation without forced cooling.
- High power factor > 0.99 and meets PFC regulations and current THD as per IEC 61000-3- 2 Class A.
- Meets requirements of conducted emissions standard (EN55011 Class B).
- ZCS avoidance feature and OVP sensing feature in LLC controller improves robustness and protects systems from overcurrent, short circuit, and overvoltage to ensure safety.
- Small 160x80x35mm PCB form factor.
To learn more, click here.
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