250-W single-stage LLC converter with multiple outputs reference design PMP40482 (ACTIVE)

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Key Document

Description

This is a single-stage reference design converting AC input voltage 85-115-V AC to three isolated outputs - 12 V/7.5 A, 60 V/2.5 A, 25 V/0.4 A with one non-isolated output 21 V/0.15 A using the UCC256304 resonant controller. The design is for industrial applications and the bill of materials (BOM) cost is highly optimized with the single-stage structure and the use of the resonant controller. The high voltage startup, integrated driver and burst operation of UCC256304 allows minimum use of discrete components and eliminates the need for an auxiliary supply.

Features
  • Single-stage AC/DC solution with 85-115-V AC input range eliminates the need of front-end PFC
  • Generates multiple output voltages applicable to different applications
  • Weighted feedback enables tight-cross regulation for 60-V and 12-V DC outputs
  • Low profile design with maximum board height of 35 mm
  • Provides efficient power conversion with greater than 92% peak efficiency

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP40482.1
(Output Voltage 1)
PMP40482.2
(Output Voltage 2)
PMP40482.3
(Output Voltage 3)
PMP40482.4
(Output Voltage 4)
Vin (Min) (V)85858585
Vin (Max) (V)115115115115
Vout (Nom) (V)12602521
Iout (Max) (A)7.52.5.4.15
Output Power (W)90150103.15
Isolated/Non-IsolatedIsolatedIsolatedIsolatedNon-Isolated
Input TypeACACACAC
TopologyHalf Bridge- LLCHalf Bridge- LLCHalf Bridge- LLCHalf Bridge- LLC

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TL431  Adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available
UCC256304  Wide Vin LLC Resonant Controller With High-Voltage Start Up Enabling Low Standby Power  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TL431 Download Download
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UCC256304 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1085 12 Apr 2019
Design files (6)
Title Type Size (KB) Date
ZIP 1243 12 Apr 2019
ZIP 1875 12 Apr 2019
PDF 1403 12 Apr 2019
PDF 221 12 Apr 2019
PDF 109 12 Apr 2019
PDF 196 12 Apr 2019

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