480W, <17 mm, Thin Profile, 94% Efficiency, Fast Transient Response AC/DC SMPS Reference Design


Design files


The TIDA-01495 is a low profile (17 mm height), 94.1% peak efficiency, high power density, universal input, 24-V DC, 480-W output, consumer AC/DC power supply reference design. The circuit consists of a front-end two phase interleaved transition mode (TM) power factor correction (PFC) based on the UCC28063A, which minimizes the PFC inductor dimensions and reduces the EMI filter requirements. The HB-LLC isolated DC/DC stage is controlled by the UCC256301 hybrid hysteritic control LLC controller, which ensures fast transient response resulting in reduced PFC bulk and output capacitor dimension. Phase shedding in the PFC stage and the advance burst mode optimization feature in the LLC stage help in meeting high efficiency at 5% load (230V AC). The UCC24612 multi-mode synchronous rectifier controller realizes proportional gate drive, reducing the conduction losses in the output rectifier of the LLC stage, enabling high efficiency.

  • Thin profile < 17mm height for use in space constrained applications with PCB form factor of 185 x 110 mm
  • Full load efficiency of >93.3% (230V AC) and >91.1% (115V AC) with peak efficiency of 94.1% (230V AC) and 92% (115V AC) meets the 80+ Platinum standard
  • Phase shedding feature in the PFC stage and advanced burst mode feature in the LLC stage enables high efficiency at light load conditions >84% (230V AC) and >82% (115V AC) at 5% load
  • ZCS avoidance feature and OVP sensing feature in the LLC controller improves robustness, system protected for over current, short-circuit, and over voltage, ensuring safety
  • High power factor > 0.99 and meets PFC regulations & current THD as per IEC 61000-3-2 Class A
  • Designed to meet EN55011 Class B conducted emissions standard
Output voltage options TIDA-01495.1
Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 24
Iout (Max) (A) 20
Output Power (W) 480
Isolated/Non-Isolated Isolated
Input Type AC
Topology Half Bridge- LLC^PFC- Multiphase
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDW0.PDF (1470 K)

Reference design overview and verified performance test data

TIDRV74A.PDF (535 K)

Detailed schematic diagram for design layout and components

TIDRV75A.PDF (168 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRV76A.PDF (361 K)

Detailed overview of design layout for component placement

TIDRV78A.ZIP (3819 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRV77A.PDF (1524 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

UCC24612High-frequency multi-mode synchronous rectifier controller

Data sheet: PDF | HTML
AC/DC & DC/DC controllers (external FET)

UCC256301Wide vin LLC resonant controller with high-voltage start up enabling ultra-low standby power

Data sheet: PDF | HTML
AC/DC & DC/DC controllers (external FET)

UCC28063ANatural interleaving transition-mode PFC controller with audible and input surge noise Immunity

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

UCC28880High voltage switcher for Non-isolated AC/DC Conversion

Data sheet: PDF | HTML
Low-side drivers

UCC275245-A/5-A dual-channel gate driver with 5-V UVLO, enable, and 1-ns delay Matching

Data sheet: PDF | HTML

CSD19501KCS80-V, N channel NexFET™ power MOSFET, single TO-220, 6.6 mOhm

Data sheet: PDF | HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 480-W, Thin-Profile, 94% Efficiency, Fast Transient Response AC/DC Ref Design Feb. 01, 2018
Application note Designing With the Improved TL431LI (Rev. A) Jun. 28, 2019

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