Single stage AC-DC auxless LLC resonant converter reference design PMP21000 (ACTIVE)

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Key Document

Description

This reference design provides a 12-V/100-W output from either 120-Vac or 230-Vac input with a single LLC resonant converter stage. The bill of materials (BOM) cost of this design is highly optimized with the single-stage structure and the use of UCC256302 LLC resonant controller. High voltage startup, integrated driver, as well as burst operation that UCC256302 provided allows minimum use of discrete components and also eliminates the need of an auxiliary supply. Along with UCC24612-2 synchronous rectifier (SR) controller to optimize SR MOSFET’s conduction time, this design is able to achieve 91.7% peak efficiency at 120-Vac input and 93.1% peak efficiency at 230-Vac input.

Features
  • 120-Vac or 230-Vac input to 12-V/100-W output
  • Single-stage AC-DC converter
  • <0.3-W standby power consumption
  • Peak efficiency: 91.7% at 120-Vac and 93.1% at 230-Vac input

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP21000.1
(Output Voltage 1)
Vin (Min) (V)102
Vin (Max) (V)265
Vout (Nom) (V)12
Iout (Max) (A)8.3
Output Power (W)99.6
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyHalf Bridge- LLC

TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18501Q5A  40V, N ch NexFET MOSFET™, single SON5x6, 3.2mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
TLVH431A  1% accuracy low-voltage wide-operating current adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
UCC24612  High-frequency multi-mode synchronous rectifier controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC256302  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)
CSD18501Q5A VSONP (DQJ)| 8 Download Download
TLVH431A Download Download
Download Download
Download -
Download Download
Download Download
UCC24612 Download Download
UCC256302 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 3403 05 Nov 2018
Design files (6)
Title Type Size (KB) Date
ZIP 1480 06 Nov 2018
ZIP 877 06 Nov 2018
PDF 635 06 Nov 2018
PDF 133 06 Nov 2018
PDF 92 06 Nov 2018
PDF 178 06 Nov 2018

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