TIDA-010058

5-V/2-A, 12-V/2.5-A Dual-output flyback reference design with <50-mW standby power

TIDA-010058

Design files

Overview

This reference design is a dual-output flyback converter using secondary-side regulation based on the UCC28742. A 5-V rail is regulated within ±1% precision and a cross regulation of a 12-V rail is within -8% to +14% at 25% to 100% load. The design utilizes a single-layer PCB for cost optimization. The peak efficiency is 82.82% at 115 V/50 Hz and 83.19% at 230 V/50 Hz. Power consumption at standby mode is 31.6 mW at 115 V/50 Hz and 54.2 mW at 230 V/50 Hz.

Features
  • <50-mA standby power consumption for 50-W power supply applications
  • Optocoupler feedback delivers fast transient response and tight voltage regulation
  • DCM operation with valley switching for improved efficiency and reduced EMI
  • Ultra-low startup current and large VDD  hysteresis for low bias capacitance
  • Fault protections, including input low line, output overvoltage, overcurrent, and short-circuit protection
Output voltage options TIDA-010058.1 TIDA-010058.2
Vin (Min) (V) 85 85
Vin (Max) (V) 264 264
Vout (Nom) (V) 12 5
Iout (Max) (A) 2.5 2
Output Power (W) 30 10
Isolated/Non-Isolated Isolated Isolated
Input Type AC AC
Topology Flyback- Non Sync Flyback- Non Sync
??image.gallery.download_en_US?? View video with transcript Video

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.

TIDUEQ4.PDF (5218 K)

Reference design overview and verified performance test data

TIDM061.PDF (165 K)

Detailed schematic diagram for design layout and components

TIDM062.PDF (164 K)

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

TIDM063.PDF (81 K)

Detailed overview of design layout for component placement

TIDM065.ZIP (525 K)

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

TIDCFJ7.ZIP (209 K)

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

TIDM064.PDF (809 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

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

UCC28742High-Efficiency Flyback Controller with 1% Output regulation accuracy

Data sheet: PDF | HTML
Shunt voltage references

ATL4312.5-V low-IQ adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

star
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Design guide 5-V/2-A, 12-V/2.5-A Dual-Output Flyback Ref Design With < 50-mW Standby Power Jul. 02, 2019

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​

Videos