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


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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

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Solar Inverter Systems Made Simple Training Series

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Schematic/Block Diagram

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Design Files

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Bill of Materials (BOM)

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(Output Voltage 1)
(Output Voltage 2)
(Output Voltage 3)
(Output Voltage 4)
(Output Voltage 5)
(Output Voltage 6)
(Output Voltage 7)
(Output Voltage 8)
Vin (Min) (V)2020202020202025
Vin (Max) (V)4040404040404040
Vout (Nom) (V)121214914910.5275
Iout (Max) (A).
Output Power (W)331.
TopologyBuck- SynchronousFlybuckFlybuckFlybuckFlybuckFlybuckBuck- SynchronousFlyback- Active Clamp

TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5017  7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
SM72295  3A Full Bridge Gate Driver with integrated Current Sense Amplifier SM72295  Gate Drivers  Sample & Buy View Design Kits & Evaluation Modules
SM72482  Dual 5A Compound Gate Driver  Gate Drivers  Not Available Not Available
SM74101  Tiny 7A MOSFET Gate Driver  Gate Drivers  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5017 Download Download
Download Download
SM72295 Download Download
SM72482 Download Download
SM74101 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (2)
Title Abstract Type Size (KB) Date Views
PDF 2042 16 Oct 2014 37
PDF 6712 16 Oct 2014 19
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 746 16 Oct 2014 16
PDF 44 16 Oct 2014 26
PDF 507 16 Oct 2014 41

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