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


Design files


The reference design was designed for the 1 phase smart meter application. It uses the UCC28600 quasi-resonant flyback controller to generate four 3KV isolated output rails from an extremely wide input source from 85VAC to 300VAC. The four output rails have independent protections to improve system reliability. The synchronous buck converter TPS560430 was used on the 12V 0.3A rail to generate a 0.1% output ripple voltage for post modules. The board size is 100mm(L)*43.5mm(W)*20mm(H).

  • Wide input range from 85VAC to 300VAC
  • 3KV isolated output rails: 5V/0.15A, 5V/0.03A, 12V/0.3A, 5V/0.06A
  • 0.1% output ripple for 12V 0.3A rail
  • Input OVP, independent output OCP and SCP feature for each rail
  • Size: 100(L)*43.5(W)*20mm(H)
Output voltage options PMP40381.1 PMP40381.2 PMP40381.3 PMP40381.4
Vin (Min) (V) 85 85 85 85
Vin (Max) (V) 300 300 300 300
Vout (Nom) (V) 5 5 12 5
Iout (Max) (A) .15 .03 .3 .06
Output Power (W) .75 .15 3.6 .3
Isolated/Non-Isolated Isolated Isolated Isolated Isolated
Input Type AC AC AC AC
Topology Flyback- Quasi Resonant 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

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TIDT005.PDF (924 K)

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


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


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


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

TLV760100-mA, 30-V, low-dropout voltage regulator

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

TPS709150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and 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 PMP40381 Test Results May 04, 2018

Related design resources

Reference designs

PMP40347 3 Phase AC Input, 12W Output Reference Design for E-meter

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