Renesas provides an efficient power distribution network solution based on Intelligent Power Device (IPD) technologies. The intelligent protection and diagnostic functions of the IPDs raise the safety level over mechanical relays. Together with their small size and weight, IPDs are the key enabler to building advanced automotive power distribution networks with cable harness optimization and functional safety implementation. The battery power is split into multiple parallel lines providing a protected and distributed power supply into the network. This forms the basis of creating any type of hierarchical architecture, enabling further nesting to achieve the desired safety level through redundancy.

System Benefits:

  • Relay and fuse replacement by high operating current IPDs with protection features to shut down the circuit during over-temperature and overcurrent situations.
  • Optimize BOM and realize miniaturization with the RL78 MCU line-up containing small packages and low power consumption.
  • An MCU monitors the load current of IPDs through programmable control current sense terminal check and shut down in the suitable sequence once overcurrent is detected.
  • Soft start-up by cascaded switch-on of the IPDs is possible to control the timing of each peak current.
  • Achieve functional safety through parallel power lines supporting redundant networks.



Winning Combinations Interactive Diagram

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AS-207 Ground.348 Sheet.290 Sheet.291 Ground.292 Sheet.293 Sheet.294 Ground.295 Sheet.296 Sheet.297 AS207 AS207 AS207 12V Battery 12V Battery 12V Battery Connector Arrow.409 IPD 1 IPD IPD IPD 2 IPD IPD Connector Arrow Connector Arrow.141 Connector Line Connector Line.144 Connector Line.151 Connector Line.152 Connector Line.153 Connector Line.154 Connector Line.155 Connector Arrow.157 Connector Line.160 Connector Line.161 IPD 3 IPD IPD IPD 4 IPD IPD Connector Line.165 Connector Arrow.166 Connector Line.169 Connector Arrow.172 Connector Line.174 Connector Line.175 Connector Line.177 Connector Line.178 Connector Line.179 Connector Line.180 Connector Line.181 Connector Line.182 Connector Line.183 Connector Line.185 Connector Line.186 Connector Line.188 Connector Line.191 Connector Arrow.197 Connector Line.198 Connector Line.199 Connector Line.201 Connector Line.204 Connector Line.208 Connector Line.209 Connector Line.217 Connector Line.218 Connector dotted line.223 Connector dotted line.224 Connector Line.225 Connector Line.226 Connector Line.227 Connector dotted line.228 Connector dotted line.238 5V 5V 5V ON/OFF Control 1 ON/OFF Control 1 ON/OFF Control 1 Current Feedback Current Feedback Current Feedback N: Number of parallel lines of 1st stage. N: Number of parallel lines of 1st stage. N: Number of parallel lines of 1st stage. Power Distribution Box Power Distribution Box Power Distribution Box Power Distribution Box Connector dotted line.252 Connector Line.256 Battery 12V Battery 12V Battery 12V Battery 12V Battery Connector Line.277 CAN/LIN CAN/LIN CAN/LIN LDO LDO LDO IPD1 IPD1 IPD1 IPD2 IPD2 IPD2 IPD N IPD N IPD N Other ECUs 1 Other ECUs Other ECUs Other ECUs 2 Other ECUs Other ECUs Other ECUs 3 Other ECUs Other ECUs IPD3 IPD3 IPD3 MCU 16bit MCU.119 16bit MCU 16bit MCU TXD TXD TXD RXD RXD RXD GPIO GPIO GPIO ADC ADC ADC
Exiting Interactive Block Diagram