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Renesas Electronics Corporation

Smart Streetlight

Overview

Description

Designed as a networked, sensor‑enabled IoT light fixture, the smart streetlight system combines ultra‑low power Sub‑GHz wireless communication with high‑sensitivity ambient light sensing. Real‑time brightness adaptation, standardized data sharing, and remote management help reduce energy consumption, enable predictive maintenance, and enhance public safety within smart city environments.

System Benefits:

  • Reliable Sub‑GHz IoT communication with ultra‑low power consumption for long‑lasting operation
  • Ultra‑low power architecture extends battery life and minimizes energy consumption in always‑on wireless systems
  • Intelligent ambient light sensing enables adaptive brightness control for improved energy efficiency

Comparison

Applications

Block Diagram

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WebConnector Arrow.230Dynamic connector.205Connector Arrow.229Connector Arrow.231AC Power Source.1025Sheet.3Alternating CurrentLED ArrayLED ArrayLED ArrayDiode - LEDSheet.48Sheet.49Sheet.50Sheet.51Sheet.52Darlington.651Sheet.54Darlington.254Diode - LED.1253Sheet.57Sheet.58Sheet.59Sheet.60Sheet.61Darlington.651Sheet.63Darlington.254Diode - LED.1262Sheet.66Sheet.67Sheet.68Sheet.69Sheet.70Darlington.651Sheet.72Darlington.254Transformer.1390Line.841Inductor Air Core.509Sheet.78Sheet.79Sheet.80Sheet.81Sheet.82Sheet.83Sheet.84Sheet.85Sheet.86Line.29Inductor Air Core.212Sheet.89Sheet.90Sheet.91Sheet.92Sheet.93Sheet.94Sheet.95Sheet.96Sheet.97Board.1464Feedback controlFeedback ControlFeedback ControlDynamic connectorDynamic connector.1470Dynamic connector.1471Dynamic connector.1472Dynamic connector.1477Dynamic connector.1478Dynamic connector.1488AntennaSheet.172Sheet.173Sheet.174Sheet.175Sheet.176Sub 1 GHZSub 1 GHzSub 1 GHzConnected signals arrowConnector Arrow5V5V5V3.3V3.3V3.3VConnector Arrow.1531Connector Arrow.1534Connector Arrow.1538Connector Arrow.1539Connector 1.160Dynamic connector.1542230v ac230V AC230V ACConnector Arrow.217LDOLDOLDOLDOLDOLDOConnector Arrow.220Connector Arrow.221Connector Arrow.222Connector Arrow.226Connector Arrow.227Connector Arrow.228Bi-directionalBi-directional.233EMI Filter & Rectifier BridgeEMI Filter & Rectifier BridgeEMI Filter & Rectifier BridgeConnector Arrow.244High-Voltage StartupHigh-Voltage StartupHigh-VoltageStartupAux Power StageAux Power StageAux PowerStagePFC+HWLLC ControllerPFC+HWLLC ControllerPFC+HWLLCControllerGate DriverGate DriverGate DriverRectangleCC/CV ControllerCC/CV ControllerCC/CVControllerSheet.256Boost PFCBoost PFCBoost PFCTransformer Inductor Iron CoreLine.841Inductor Air Core.212Sheet.10Sheet.11Sheet.12Sheet.13Sheet.14Sheet.15Sheet.16Sheet.17Sheet.18Line.29Sheet.257HWLLCHWLLCHWLLCTransformerLine.841Inductor Air Core.509Sheet.23Sheet.24Sheet.25Sheet.26Sheet.27Sheet.28Sheet.29Sheet.30Sheet.31Line.29Inductor Air Core.212Sheet.34Sheet.35Sheet.36Sheet.37Sheet.38Sheet.39Sheet.40Sheet.41Sheet.42Connector Arrow.258Connector Arrow.259RF frontRF FrontRF FrontPIR SensorPIR SensorPIR SensorVCCVCCVCCWS184WS184WS184Connector 1.160.268Sheet.288Sheet.289Darlington.651Sheet.291Darlington.254Sheet.295Line.163Line.168Sheet.271Sheet.272Sheet.273FET n-channel.420Sheet.276Sheet.277Sheet.278Sheet.279Sheet.280Sheet.281Sheet.296Line.160TriangleLine.141Line.161Line.162Rectangle.297Sheet.298Sheet.299Darlington.651Sheet.301Darlington.254Sheet.303Line.163Line.168Sheet.307Sheet.308Sheet.309FET n-channel.420Sheet.311Sheet.312Sheet.313Sheet.314Sheet.315Sheet.316Sheet.317Line.160TriangleLine.141Line.161Line.162Sheet.323Dimming ControllerDimming ControllerDimming ControllerVCCVCCVCCCFCFCFDRVDRVDRVSheet.324MCUMCUMCUPWMPWMPWMI2CI2CI2CI2CI2CI2CANTANTANTVCCVCCVCCSheet.325Ambient Light SensorAmbient Light SensorAmbient Light SensorVCCVCCVCCConnector 1.160.327
Exiting Interactive Block Diagram

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