Complete Gate Drive and Bias Power Solution for Solar MicroInverter's DC/DC and DC/AC Blocks


Design files


PMP9461 is a reference design with complete power and gate drive requirements for grid tie solar microinverters.  The major goal of the reference design is to acheive significant integration and perfomance enhancement in gate drive as well as the bias supply segment of microInverters.  The solution features SM72295 (full bridge gate driver with integrated current sense), SM74101 (7A Sink/3A source single driver), SM72482 (5A dual low side driver), LM5017 (as primary and secondary bias supply provider), and again the LM5017 for powering up the drivers in DC/AC section of inverters.  All bias supplies are generated using cost effective and highly efficent Fly-BuckTM topology.

  • Full bridge configuration of driver reduces component count
  • 100V integrated diodes in driver allow higher input voltage rail and transients
  • High integration with internal current sensing with no external current amplifier needed.
  • Dual half-bridge 100V, 3A MOSFET drivers
  • Simple, low BOM count, and low cost design for bias supply
  • Removes the need of external adapters for isolated bias power
Output voltage options PMP9461.1 PMP9461.2 PMP9461.3 PMP9461.4 PMP9461.5 PMP9461.6 PMP9461.7 PMP9461.8
Vin (Min) (V) 20 20 20 20 20 20 20 25
Vin (Max) (V) 40 40 40 40 40 40 40 40
Vout (Nom) (V) 12 12 14 9 14 9 10.5 275
Iout (Max) (A) .25 .25 .1 .1 .1 .1 .01 .6
Output Power (W) 3 3 1.4 .9 1.4 .9 .105 165
Isolated/Non-Isolated Non-Isolated Isolated Isolated Isolated Isolated Isolated Non-Isolated Isolated
Topology Buck- Synchronous FlyBuck FlyBuck FlyBuck FlyBuck FlyBuck Buck- Synchronous Flyback- Active Clamp
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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.

TIDU606.PDF (6772 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

TIDC709.ZIP (746 K)

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


Includes TI products in the design and potential alternatives.

Half-bridge drivers

SM722953-A, 100-V full bridge gate driver with Integrated current sense amplifier

Data sheet: PDF
Isolated DC/DC converters & modules

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

Data sheet: PDF | HTML
Low-side drivers

SM72482Dual 5A Compound gate driver

Data sheet: PDF
Low-side drivers

SM741013-A/7-A single channel gate driver with input ground for split supply operation

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
User guide Digitally Controlled Solar Micro Inverter Using C2000 Piccolo Microcontroller Oct. 16, 2014
Test report PMP9461 Test Results Oct. 16, 2014

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