IC manufacturers Texas Instruments

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Texas Instruments UCC256301 | Demoboard TIDA-010015

94.5% Efficiency, 500W industrial AC-DC reference design

Overview

TopologyLLC Resonant Converter
Input voltage85-265 V
Output 124 V / 21 A
IC revisionE1

Description

This reference design is a compact, high efficiency, 24-V DC, 500-W 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 minimizes 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 330-W operation without forced cooling
  • High power factor > 0.99 and meets PFC regulations and current THD as per IEC 61000-3- 2 Class AMeets 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 160 mm × 80 mm × 35 mm PCB form factor

Typical applications

  • Medical PSU

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureQRISOCeramic TypeL
(mm)
W
(mm)
Fl
(mm)
Pins (Value)
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples
885012006023SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 16 V(DC)100 pF ±5% 16 0603 -55 °C up to +125 °C 100010 GΩ NP0 Class I 1.6 0.8 0.4 0.8 7" Tape & Reel
61300111121SPEC
6 files Active i| Production is active. Expected lifetime: >10 years.WR-PHD 2.54 mm THT Pin Header -40 °C up to +105 °C1000 MΩ 2.54 1 Single Pin Header Straight 3 Bag
Order Code Data­sheet Simu­lation
885012006023SPEC
61300111121SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureQRISOCeramic TypeL
(mm)
W
(mm)
Fl
(mm)
Pins (Value)
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples