Low Standby Power Quasi-Resonant Isolated Flyback 90 to 265VACin 24V@0.7A Reference Design


Design files


The PMP8655 reference design uses the LM5023 quasi-resonant flyback controller to generate 24V@0.7A output from an universal input. Particular attention to light load efficiency resulted in more than 82% efficiency for 1W output power and 90VAC input. In addition, the valley switching of the LM5023 allows this design to achieve a maximum efficiency of 88%.

Output voltage options PMP8655.1
Vin (Min) (V) 90
Vin (Max) (V) 265
Vout (Nom) (V) 24
Iout (Max) (A) .7
Output Power (W) 16.8
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- Quasi Resonant

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.

SNVU356.PDF (1373 K)

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

SNVR357.PDF (142 K)

Detailed schematic diagram for design layout and components

SNVR358.PDF (109 K)

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

SNVU357.PDF (301 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Flyback controllers

LM5023AC-DC quasi-Resonant current mode PWM controller

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
Test report PMP8655 Test Results Oct. 11, 2013

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