94% Peak Efficiency, Super Transient, 450W AC/DC Reference Design with Single-layer PCB
TIDA-01501
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Key Document

Description

This reference design is a 450W high-efficiency and super transient AC/DC converter for desktop PC PSUs, gaming PC PSUs, entry-level server PSUs, and other low-cost AC/DC PSUs. The circuit consists of a front-end continuous conduction mode (CCM) power factor correction (PFC) circuit, followed by an LLC-based second stage. The design uses the UCC28180 controller for the PFC stage and UCC256301 controller for the LLC stage to achieve a compact and robust control structure. Synchronous rectification based on the UCC24612 and low RDS(on) FETs aids in achieving higher efficiencies. This reference design can be used as an AC/DC supply in many applications demanding efficient and super transient power conversion.

Features
  • Peak efficiency 93% @ 230VAC for whole stage
  • Full power delivery across wide AC input range:  85 - 265VAC
  • Leading transient performance (half duty-cycle response for line transient and dynamic load)
  • Single layer PCB design to achieve low solution cost
  • Robust protection built in

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 TIDA-01501.1
(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)264
Vout (Nom) (V)12
Iout (Max) (A)37.5
Output Power (W)450
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyHalf Bridge- LLC
PFC- Boost

TI Devices (6)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18540Q5B  60V, N ch NexFET MOSFET™, single SON5x6, 2.2mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LM258A  Dual operational amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TL431  Adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available
UCC24612  High-frequency multi-mode synchronous rectifier controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC256301  Wide vin LLC resonant controller with high-voltage start up enabling ultra-low standby power  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC28180  8-Pin Continuous Conduction Mode (CCM) PFC Controller  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)
CSD18540Q5B VSON-CLIP (DNK)| 8 Download Download
LM258A Download Download
Download Download
Download Download
TL431 Download Download
Download Download
Download -
Download Download
Download Download
Download Download
Download Download
Download -
Download Download
UCC24612 Download Download
UCC256301 Download Download
UCC28180 Download

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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Application notes (1)
Title Type Size (KB) Date
PDF 226 28 Jun 2019
User guides (1)
Title Type Size (KB) Date
PDF 1051 02 Jan 2018
Design files (6)
Title Type Size (KB) Date
PDF 572 10 Apr 2018
ZIP 1235 10 Apr 2018
ZIP 1574 10 Apr 2018
ZIP 2571 10 Apr 2018
ZIP 695 10 Apr 2018
ZIP 207 10 Apr 2018
Related Tools & Software

Reference Designs  ( 2 )


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