High-line 185V to 265V AC input; 12 V @ 2A output Isolated Flyback AC to DC Converter


Design files


This power reference design uses the LM5021 AC-DC Current Mode PWM controller. The switching frequency is programmed at 130KHz in an isolated flyback topology with minimal external components and small form factor size. The design is optimized for high-line input and 12V / 2A output. High Efficiency is achieved over load range thanks to the skip cycle mode and ultra low start-up current of the LM5021 controller.

  • Fixed Swicthing frequency @130KHz
  • 86.6% efficiency achieved @ 230Vac input, 12V@2A output
  • 76.6% efficiency at 10% load
  • 130mA No load power disappation
  • Excellent Output voltage regulation achieved
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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.

TIDU839.PDF (348 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


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

TIDC961.ZIP (61 K)

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


Includes TI products in the design and potential alternatives.

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

LM502130V, 1MHZ current mode PWM controller

Data sheet: PDF | HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP7188 Test Results Mar. 10, 2015

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