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Micro inverter

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Block diagram

Micro inverter

Block diagram

Overview

Our integrated circuits and reference designs help you accelerate development of solar micro inverters, improving power density and efficiency while providing real-time communication and monitoring.

Design requirements

    Micro inverters require design expertise to achieve:

  • High-power conversion efficiency to reduce self-heating.
  • High-power density to ensure a small form-factor.
  • Real-time communication and monitoring.
  • Safe operation of high-voltage outputs.
Explore applications similar in function and design

Block diagram

Find products and reference designs for your system.

Micro inverter

DC/DC power stage DC/DC power stage Temp sensor Temp sensor Gate drivers Gate drivers Boost converter Boost converter PWM PWM Flyback, Push Pull or LLC Flyback, Push Pull or LLC GaN GaN Grid connection Grid connection PV input 20-60 V PV input20-60 V Digital processing Digital processing MCU MCU SVS SVS RTC RTC IO voltages IO voltages Internal rail Internal rail Non-isolated DC/DC power supply Non-isolated DC/DC power supply DC/DC DC/DC LDO LDO Grid-side isolated AC/DC power supply Grid-side isolated AC/DC power supply Isolated AC/DC Isolated AC/DC PV-side DC/DC power supply PV-side DC/DC power supply DC/DC DC/DC Isolated DC/DC power supply Isolated DC/DC power supply Isolated DC/DC Isolated DC/DC Isolated power (for Isolated gate drivers) Isolated power(for Isolated gate drivers) OR OR Wireless interface Wireless interface Wi-Fi Wi-Fi ZigBee ZigBee Sub-1 GHz Sub-1 GHz Bluetooth Bluetooth PV input 20-60 V PV input20-60 V Grid connection Grid connection Input current & voltage sense Input current & voltage sense Amp Amp Amp Amp Current sensor Current sensor Current Current Voltage Voltage Bus current & voltage sense Bus current & voltage sense Amp Amp Amp Amp Current sensor Current sensor Current Current Voltage Voltage Output current & voltage sense Output current & voltage sense Amp Amp Amp Amp Isolatedcurrent sensor Isolatedcurrent sensor Current Current Voltage Voltage 4 4 Relay control power stage Relay control power stage Relay driver Relay driver Relay Relay Signal isolation Signal isolation Data isolation Data isolation Optional Optional Wired interface Wired interface PLC PLC RS-232 RS-232 RS-485 RS-485 DC/AC power stage DC/AC power stage Temp sensor(s) Temp sensor(s) Gate drivers Gate drivers Gate drivers Gate drivers Gate drivers Gate drivers Gate drivers Gate drivers Totem pole or Full-bridge inverter Totem pole or Full-bridge inverter PWM PWM PWM PWM PWM PWM PWM PWM GaN GaN GaN GaN GaN GaN GaN GaN

Digital processing

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Both main power stages in a solar inverter are controlled by a DSP. Using a DSP based solution power can be more efficiently captured from the solar array, and output harmonics can be much lower. Dedicated DSPs for the application will have sufficient MIPS or accelerators, as well as performance for a communications layer.

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Microcontrollers (MCUs) & processors (6)
C2000 real-time microcontrollers
  • TMS320F28P550SG—C2000™ 32-bit MCU with 150MHz 512KB flash C28x + CLA, five ADCs, CLB, AES and NPU
    Data sheet: PDF | HTML
  • TMS320F28P550SJ—C2000™ 32-bit MCU with 1x C28x + 1x CLA, 150MHz, 1.1MB flash, 5x ADCs, CLB, AES and NPU
    Data sheet: PDF | HTML
  • TMS320F280039C—C2000™ 32-bit MCU 120-MHz 384-KB flash, FPU, TMU with CLA, CLB, AES and CAN-FD
    Data sheet: PDF | HTML
  • TMS320F2800157—C2000™ 32-bit MCU 120-MHz 256-KB flash with HRPWM, CAN-FD
    Data sheet: PDF | HTML
  • TMS320F280037—C2000™ 32-bit MCU 120-MHz 256-KB flash, FPU, TMU with CLA, AES and CAN-FD
    Data sheet: PDF | HTML
  • TMS320F280037C—C2000™ 32-bit MCU 120-MHz 256-KB flash, FPU, TMU with CLA, CLB, AES and CAN-FD
    Data sheet: PDF | HTML
Power management (6)
Supervisor & reset ICs
  • TLV809E—Low-power voltage supervisor (reset IC) with active-low push-pull output
    Data sheet: PDF | HTML
  • TPS3702—High-accuracy window voltage detector for overvoltage and undervoltage monitoring
    Data sheet: PDF | HTML
  • TLV803—3-pin voltage supervisor (reset IC) with active-low & open-drain reset
    Data sheet: PDF | HTML
  • TPS3306-Q1—Automotive dual-processor supervisors with power-fail
    Data sheet: PDF | HTML
  • TPS3828—Voltage monitor with watchdog timer
    Data sheet: PDF | HTML
  • TPS3839—Ultra-low power, supply voltage supervisor
    Data sheet: PDF | HTML
  • TIDA-010933—1.6kW, bidirectional micro inverter based on GaN reference design
    Design guide: PDF | HTML Schematic: PDF
  • TIDM-02008—Bidirectional high density GaN CCM totem pole PFC using C2000™ MCU
    Design guide: PDF | HTML Schematic: PDF
Hardware development
Evaluation board
Development kit
  • LAUNCHXL-F2800137 — TMS320F2800137 LaunchPad™ development kit for C2000™ real-time MCU
  • LAUNCHXL-F280025C — F280025C LaunchPad™ development kit for C2000™ real-time MCU
  • LAUNCHXL-F280039C — TMS320F280039C LaunchPad™ development kit for C2000™ real-time MCU
Software development
Software development kit (SDK)

Technical documentation

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Type Title Date
Technical article Stay ahead of the energy storage and solar game with bidirectional PFC and hybrid PDF | HTML 02 Aug 2023

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