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Grid-connected Solar Micro Inverter

Overview

The solar micro inverter system based on renewable energy is becoming increasingly popular among consumers. Each system unit operates with only tens of volts of DC voltage and is connected in parallel, which minimizes potential safety hazards. Renesas provides high-performance MCU alongside all other key power and analog devices.

System Benefits:

  • 240MHz MCU uses high-resolution PWM to achieve high precision control on DC/DC and DC/AC conversions.
  • MOSFETs and drivers ensure high-efficiency power device operation.
  • Optical coupled isolation amplifier protects low-voltage devices from damage caused by high-voltage devices.

Block Diagram

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4:3 ratioMOSFETMOSFETMOSFETMOSFETSheet.247Sheet.248Sheet.249Sheet.250Sheet.251Sheet.252Sheet.253Sheet.254Sheet.255Sheet.256Sheet.257Capacitor Non-polarized .258Sheet.259Sheet.260Sheet.261Sheet.262Sheet.282Sheet.283Sheet.284Sheet.285Inductor Iron Core.286Line.841Inductor Air Core.212Sheet.289Sheet.290Sheet.291Sheet.292Sheet.293Sheet.294Sheet.295Sheet.296Sheet.297Line.29Sheet.300Q7Q7Q7Diode.305Sheet.306Sheet.307Sheet.308Capacitor Non-polarized .309Sheet.310Sheet.311Sheet.312Sheet.313Inductor Coreless (Air conductor).314Sheet.315Sheet.316Sheet.317Sheet.318Sheet.319Sheet.320Sheet.321Sheet.322Sheet.323Connector 1.324Connector 1.325Connector 1.326Connector 1.327Sheet.328Connector 1.329Connector 1.330Sheet.346Sheet.347Sheet.348Sheet.349Sheet.350Sheet.351Sheet.352Sheet.353Sheet.354Sheet.355Sheet.356Capacitor Non-polarized .357Sheet.358Sheet.359Sheet.360Sheet.361Sheet.381Sheet.382Sheet.383Inductor Iron Core.384Line.841Inductor Air Core.212Sheet.387Sheet.388Sheet.389Sheet.390Sheet.391Sheet.392Sheet.393Sheet.394Sheet.395Line.29Sheet.398Q8Q8Q8Diode.403Sheet.404Sheet.405Sheet.406Capacitor Non-polarized .407Sheet.408Sheet.409Sheet.410Sheet.411Inductor Coreless (Air conductor).412Sheet.413Sheet.414Sheet.415Sheet.416Sheet.417Sheet.418Sheet.419Sheet.420Sheet.421Connector 1.422Connector 1.423Connector 1.424Connector 1.425Connector 1.426Connector 1.427Connector 1.432Sheet.433Connector 1.434Sheet.435Connector 1.436Sheet.437Sheet.438Sheet.439Sheet.440Sheet.441Sheet.442Sheet.443Sheet.24Sheet.25Sheet.26Sheet.27Sheet.28Sheet.29Sheet.30Sheet.31Sheet.32Sheet.33Sheet.34Capacitor Non-polarizedSheet.36Sheet.37Sheet.38Sheet.39Sheet.63Sheet.64Sheet.78Sheet.79Inductor Iron CoreLine.841Inductor Air Core.212Sheet.83Sheet.84Sheet.85Sheet.86Sheet.87Sheet.88Sheet.89Sheet.90Sheet.91Line.29Sheet.94Q1Q1Q1DiodeSheet.100Sheet.101Sheet.102Capacitor Non-polarized .103Sheet.104Sheet.105Sheet.106Sheet.107Inductor Coreless (Air conductor)Sheet.109Sheet.110Sheet.111Sheet.112Sheet.113Sheet.114Sheet.115Sheet.116Sheet.117Connector 1.161Connector 1.161.120Connector 1.161.121Connector 1.161.122Connector 1.161.124Connector 1.161.125Sheet.126Sheet.143Sheet.144Sheet.145Sheet.146Sheet.147Sheet.148Sheet.149Sheet.150Sheet.151Sheet.152Sheet.153Capacitor Non-polarized .154Sheet.155Sheet.156Sheet.157Sheet.158Sheet.179Sheet.180Sheet.181Inductor Iron Core.182Line.841Inductor Air Core.212Sheet.185Sheet.186Sheet.187Sheet.188Sheet.189Sheet.190Sheet.191Sheet.192Sheet.193Line.29Sheet.196Q2Q2Q2Diode.201Sheet.202Sheet.203Sheet.204Capacitor Non-polarized .205Sheet.206Sheet.207Sheet.208Sheet.209Inductor Coreless (Air conductor).210Sheet.211Sheet.212Sheet.213Sheet.214Sheet.215Sheet.216Sheet.217Sheet.218Sheet.219Connector 1.221Connector 1.222Connector 1.223Connector 1.224Connector 1.225Connector 1.226Connector 1.161.233Sheet.234Connector 1.161.235Sheet.236Connector 1.161.237Sheet.239Sheet.240Sheet.241Sheet.243Sheet.244Sheet.245Sheet.246Connector 1.161.446Connector 1.161.683Connector 1.161.684Connector 1.161.685IGBTGaN FETGaN FETGaN FETSheet.554Sheet.532Sheet.533Sheet.534Sheet.535Sheet.536Sheet.539Darlington.581Sheet.542Sheet.543Sheet.544Sheet.545Diode.550Sheet.551Sheet.552Sheet.553Sheet.555Sheet.556Sheet.557Sheet.558Sheet.559Sheet.560Sheet.561Darlington.581Sheet.563Sheet.564Sheet.565Sheet.566Diode.550Sheet.568Sheet.569Sheet.570Sheet.571Sheet.572Sheet.573Sheet.574Sheet.575Sheet.576Sheet.577Darlington.581Sheet.579Sheet.580Sheet.581Sheet.582Diode.550Sheet.584Sheet.585Sheet.586Sheet.587Sheet.588Sheet.589Sheet.590Sheet.591Sheet.592Sheet.593Darlington.581Sheet.595Sheet.596Sheet.597Sheet.598Diode.550Sheet.600Sheet.601Sheet.602Connector 1.161.606Connector 1.161.608Connector 1.161.610Connector 1.161.611Q9Q9Q9Q10Q10Q10Q11Q11Q11Q12Q12Q12Sheet.1Sheet.2Sheet.3Sheet.4CN368CN368CN368Sheet.263Sheet.264Sheet.265Sheet.266Sheet.267Sheet.268Sheet.269Sheet.270Sheet.271Sheet.272Sheet.273Sheet.274Sheet.275Sheet.276Sheet.277Sheet.278Sheet.279Sheet.280Sheet.281Sheet.299Sheet.301Sheet.302Sheet.303Sheet.343Sheet.344Connector 1.345Sheet.362Sheet.363Sheet.364Sheet.365Sheet.366Sheet.367Sheet.368Sheet.369Sheet.370Sheet.371Sheet.372Sheet.373Sheet.374Sheet.375Sheet.376Sheet.377Sheet.378Sheet.379Sheet.380Sheet.397Sheet.399Sheet.400Sheet.401Sheet.428Connector 1.429Sheet.41Sheet.42Sheet.43Sheet.44Sheet.45Sheet.46Sheet.47Sheet.48Sheet.49Sheet.50Sheet.51Sheet.52Sheet.53Sheet.54Sheet.55Sheet.56Sheet.57Sheet.58Sheet.59Sheet.93Sheet.95Sheet.96Sheet.97Sheet.123Capacitor Non-polarized .128Sheet.129Sheet.130Sheet.131Sheet.132Signal GroundSheet.135Sheet.136Sheet.137Sheet.138Connector 1.161.139Sheet.140Sheet.141Connector 1.161.142Sheet.159Sheet.160Sheet.161Sheet.162Sheet.163Sheet.164Sheet.165Sheet.166Sheet.167Sheet.168Sheet.169Sheet.170Sheet.171Sheet.172Sheet.173Sheet.174Sheet.175Sheet.176Sheet.177Sheet.195Sheet.197Sheet.198Sheet.199Sheet.228Connector 1.229Vin: 30 to 60VVin: 30 to 60VVin: 30 to 60VSheet.232Signal Ground.457Sheet.458Sheet.459Sheet.460Sheet.461Ground (earth)Sheet.463Sheet.464Sheet.465Sheet.466Sheet.467Sheet.468GNDGNDGNDHorizontal Wire BundleCommunication Lines B.795Label Text 10pt.796Sheet.478Sheet.502Inductor Iron Core.479Line.841Inductor Air Core.212Sheet.482Sheet.483Sheet.484Sheet.485Sheet.486Sheet.487Sheet.488Sheet.489Sheet.490Line.29Inductor Coreless (Air conductor).492Sheet.493Sheet.494Sheet.495Sheet.496Sheet.497Sheet.498Sheet.499Sheet.500Sheet.501Sheet.505Sheet.506Sheet.507Connector 1.161.510Sheet.511Sheet.512Sheet.513Sheet.514Sheet.51512V12V12VSheet.517Sheet.518Sheet.523Sheet.528Sheet.605Sheet.607Sheet.609Inductor Coreless (Air conductor).617Sheet.618Sheet.619Sheet.620Sheet.621Sheet.622Sheet.623Sheet.624Sheet.625Sheet.626AC Power SourceAlternating CurrentSheet.629Sheet.630Sheet.631ACACACSheet.633Sheet.634Connector Line.109Connector Line.110Connector Line.111Connector Line.112Connector Line.113Connector Line.114 4Communication Lines B.795444Sheet.658Sheet.659Sheet.660Sheet.661Sheet.662Sheet.663VPV x4VPV x4VPV x4IPV x4IPV x4IPV x4IfIybackIfIybackIfIybackVdcVdcVdcVacVacVacIACIACIAC 6666Sheet.672H-Bridge InverterH-Bridge InverterH-Bridge InverterSheet.674VDCVDCVDCConnector 1.161.6768 Interleaved Flyback Converter8 Interleaved Flyback Converter8 Interleaved Flyback ConverterSheet.678Current Flow DirectionCurrent Flow DirectionCurrent Flow Direction400V/5A400V/5A400V/5A3.3V/0.5Amax3.3V/0.5Amax3.3V/0.5AmaxAUXAUXAUXPWM ControllerPWM ControllerPWM ControllerMOSFET Driver x4MOSFET Driver x4MOSFET Driver x4DiodeDiodeDiodeBuckBuckBuckPhotocoupler Isolation Amplifier *x6Photocoupler Isolation Amplifier x6Photocoupler Isolation Amplifier x6MCUMCUMCUMCUPWMPWMPWM PWMPWMPWM12bit ADC12-bit ADC12-bitADCGaN FET Driver x4GaN FET Driver x4GaN FET Driver x4

MOSFET

Power MOSFETs

GaN FET

GaN Power Discretes

Photocoupler Isolation Amplifier

Isolation Amplifier Analog Output Photocouplers / Optocouplers

MCU

RA Arm Cortex-M MCUs

MOSFET Driver

Low-Side FET Drivers

Buck

Buck Regulators (Integrated FETs)

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