Isolated Bias Supplies + Isolated Amplifier Combo for Line Voltage or Current Measurement


Design files


PMP9480 is a dual  output Flybuck Converter plus an Isolated amplifier combo solution that can not only be used for sensing Line voltage or Line current but also  provide Aux Bias power for  complete Industrial system .  The design accepts very Wide input voltage of 10 Vin to 72Vin DC(Work on any Batteries such as 12V/24V or 48V or any available  Industrial DC bus  ) and provides Isolated  outputs of 5V@350mA(Primary Bias Supply for Controller , Amplifiers ,Interfaces, etc ) and 5V@150mA(Secondary Isolated Bias for Isolated Amplifiers , Isolated communication etc ) . It features a small size and is an inexpensive and more efficient solution to using Flyback or Pushpull converters . Isolated Amplifier AMC1200 used in this design is a precision isolation amplifier with an output separated from the input circuitry by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference.

  • Simple, low-BOM-count, and low-cost design
  • No External Loop Compensation
  • Off the Shelf Magnetics
  • Accurate Current or Voltage Measurement with Isolation
  • Transient Protection  with no Clamping Circuitry
  • Remove the need for External Adapters  in Industrial Systems
Output voltage options PMP9480.1
Vin (Min) (V) 10
Vin (Max) (V) 72
Vout (Nom) (V) 5.5
Iout (Max) (A) .35
Output Power (W) 1.925
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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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.

TIDU658.PDF (2914 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

TIDC778.ZIP (190 K)

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


Includes TI products in the design and potential alternatives.

Isolated DC/DC converters & modules

LM50177.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator

Data sheet: PDF | HTML
Isolated amplifiers

AMC1100±250-mV input, precision current sensing low-cost basic isolated amplifier

Data sheet: PDF | HTML
Isolated amplifiers

AMC1200±250-mV input, precision current sensing basic isolated amplifier

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP9480 Test Results Nov. 24, 2014

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