'120VAC Input, 5V/2A Primary-Side Regulated Flyback


Design files


The PMP8477 reference design uses the UCC28700 primary-side regulated flyback controller to generate a 5V/2A output from a standard 120VAC input. The valley switching of the UCC28700 allows this low-cost design to achieve a maximum load efficiency over 80% and has no-load losses of approximately 50mW.

Output voltage options PMP8477.1
Vin (Min) (V) 100
Vin (Max) (V) 132
Vout (Nom) (V) 5
Iout (Max) (A) 2
Output Power (W) 10
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- Quasi Resonant
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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.

SLUUA49.PDF (1092 K)

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

SLUR981.PDF (25 K)

Detailed schematic diagram for design layout and components

SLUR982.PDF (18 K)

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

SLUC402.ZIP (417 K)

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

SLUUA50.PDF (612 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Flyback controllers

UCC28700Constant-voltage, constant-current PWM with PSR & Programmable cable compensation

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP8477 Test Results Nov. 20, 2012

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