Programmable output Constant Voltage - Constant Current (CVCC) Quasi-Resonant Flyback charger


Design files


This industrial charger reference design uses the LM5023 Quasi-Resonant Flyback controller to implement a 120VAC input design with CVCC output configured by microcontroller PWM control from 10 to 22.5V and output current from 200mA to 2A.

  • Ouput voltage and current independently configured by PWM input
  • >83% efficency above 20W @21.2V output
  • 5V output provided for secondary side micro-controller
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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.

TIDU783.PDF (462 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


Detailed overview of design layout for component placement

TIDC996.ZIP (194 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)

LM5023AC-DC quasi-Resonant current mode PWM controller

Data sheet: PDF | HTML
General-purpose op amps

LM358Dual, 30-V, 700-kHz operational amplifier

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LM317L100-mA, 35-V, adjustable linear voltage regulator

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 PMP8955 Test Results Mar. 24, 2015

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