Renesas provides an efficient power distribution network solution based on Intelligent Power Device (IPD) technologies. The intelligent protection and diagnostic functions of the IPDs increase the safety level over mechanical relays. This solution optimizes wiring harnesses and improves reliability by adding current monitoring capabilities.

System Benefits​:

  • Reduce the size and weight of a fuse box by integrating 10 output channels on a compact-sized board, aligning with the smart e-fuse concept.
  • E-fuses offer maintenance-free load and wire protection that can be configured and adapted to a variety of cables. Significant higher accuracy of the e-fuses reduces the weight of the wire harness.
  • The software-based e-fuse is activated from the current-sense feedback of the IPD to the MCU. The MCU is programmed to implement the fuse function.
  • A safe parking mode*1 can be emulated by switching on the IPD and setting the MCU into a low-power mode.

*1 Parking mode represents a car parking situation where selected channels need to be active with minimum power consumption.




  • 2W/3W/4W automobiles
  • Industrial power distribution using 12V loads

Winning Combinations Interactive Diagram

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AS-234 AS234 AS234 AS234 DC/DC LDO DC/DC LDO DC/DC LDO 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery x2 x2 x2 x4 x4 x4 x4 x4 x4 Power Distribution network for other ECUs Power Distribution network for other ECUs Power Distributionnetwork for other ECUs IPD 1 IPD IPD Connector Arrow.175 Connector Arrow.176 Connector Arrow Connector Arrow.189 Connector 1 Connector Line Connector Line.192 Connector Line.195 IPD 2 IPD IPD Connector Arrow.197 Connector Arrow.198 Connector Line.199 IPD 3 IPD IPD Connector Arrow.201 Connector Arrow.202 Connector Line.203 Connector 1.204 Connector Arrow.205 Connector Arrow.206 Connector Arrow.207 Connector 1.208 UART 1 UART UART Connector Arrow.183 CAN 1 CAN CAN Connector Arrow.180 LIN 1 LIN LIN Connector Arrow.158 Temp Sensor NTC Temp Sensor NTC Temp Sensor NTC Connector Arrow.158 MCU MCU MCU MCU VCC VCC VCC GPIO GPIO GPIO CONTROL Control Control UART 2 UART UART CAN 2 CAN CAN LIN 2 LIN LIN
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e-Fuse concept based on Intelligent Power Devices (IPD)

A solution demonstrating the capability of IPDs to replace the relay and conventional fuses while contributing to higher safety, flexibility, and intelligence of future power distribution systems.