PMP8787

Primary-Side Regulated Flyback with 85 to 265VAC Input (12V @ 0.5A) Reference Design

PMP8787

Design files

Overview

The PMP8787 reference design uses the UCC28700 flyback controller to generate a 12V/500mA output from a universal AC input. The primary-side regulation technique implemented by the UCC28700 eliminates the need for an opto coupler, reducing the size and cost of the design. In addition, the valley switching of the UCC28700 allows this design to achieve a maximum load efficiency over 80%; no load losses are less than 40mW. The circuit board measures only 28mm by 33mm, with a maximum height below 20mm.

Features
  • Primary Side Regulation (no optocoupler)
  • Standby (no load) power consumption is less than 40mW
  • Conducted emissions are below Class B levels
  • Compact form factor 28mm X 33mm X 20mm
Output voltage options PMP8787.1
Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 12
Iout (Max) (A) .5
Output Power (W) 6
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- DCM^Flyback- Non Sync^Flyback- Quasi Resonant
Communications equipment
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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.

SLUUAD0A.PDF (2099 K)

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

SLURA38A.PDF (87 K)

Detailed schematic diagram for design layout and components

SLURA39A.PDF (99 K)

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

TIDRKT2.PDF (95 K)

Detailed overview of design layout for component placement

SLUC434.ZIP (166 K)

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

SLUUAD1.PDF (229 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

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

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 PMP8787 Test Results (Rev. A) Mar. 21, 2016

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