USB Phone Charger (5V @ 1A) Reference Design


Design files


This design demostrates a low cost solution for a 5V1A cube charger. By using primary side regulation (PSR) mode chip UCC28700, < 30-mW No-Load power is achieved, which meets 5-star rating. The overall size is compact, 22.5mm(L) x 20mm(W) x 20mm(H).

Output voltage options PMP8757.1
Vin (Min) (V) 90
Vin (Max) (V) 264
Vout (Nom) (V) 5
Iout (Max) (A) 1
Output Power (W) 5
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- Non Sync
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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.

SLUUA59.PDF (762 K)

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

SLUR989.PDF (20 K)

Detailed schematic diagram for design layout and components

SLUR990.PDF (189 K)

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


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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View all 2
Type Title Date
Technical article Power Tips: AC/DC phone and tablet chargers Aug. 20, 2013
Test report PMP8757 Test Results Nov. 27, 2012

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