3 Phase AC Input, 12W Output Reference Design for E-meter


Design files


This reference design was designed for the 3 Phase E-meter application. It uses the UCC28600 quasi-resonant flyback controller to generate three 3KV isolated output rails from an extremely wide input source from 110VAC to 420VAC. The 3 output rails have independent protections to improve system reliability. The synchronous buck converter TPS560430 was used on the 12V 0.7A rail to generate a 0.1% output ripple voltage for post modules. The board size is 100mm(L)*50mm(W)*20mm(H).

  • Wide input range from 110VAC to 420VAC
  • 3KV isolated output rails:12V/0.7A,12V/0.2A, 5V/0.2A
  • 0.1% output ripple for 12V 0.7A rail
  • Input OVP, independent output OCP and SCP feature for each rail
  • Size: 100(L)*50(W)*20mm(H)
Output voltage options PMP40347.1 PMP40347.2 PMP40347.3
Vin (Min) (V) 110 110 110
Vin (Max) (V) 420 420 420
Vout (Nom) (V) 12 12 5
Iout (Max) (A) .2 .7 .2
Output Power (W) 2.4 8.4 1
Isolated/Non-Isolated Isolated Isolated Isolated
Input Type AC AC AC
Topology Flyback- Quasi Resonant Flyback- Quasi Resonant 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.

TIDUEA5.PDF (1202 K)

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

TIDRW56.PDF (169 K)

Detailed schematic diagram for design layout and components

TIDRW57.PDF (112 K)

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

TIDRW58.PDF (165 K)

Detailed overview of design layout for component placement

TIDRW60.ZIP (30 K)

Files used for 3D models or 2D drawings of IC components


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

TIDRW59.PDF (815 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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

UCC286008-pin quasi resonant Flyback green mode controller

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

TPS560430SIMPLE SWITCHER® 36-V, 600-mA Buck Regulator With High-Efficiency Sleep Mode

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

LP2992250-mA, 16-V, low-dropout voltage regulator with enable

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 PMP40347 Test Results Apr. 26, 2018

Related design resources

Reference designs

PMP40381 1 Phase AC Input, 5W 4 Rail Outputs Reference Design for E-meter

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