The Renesas Smart Junction Box solution is a retrofit concept of replacing the relays with an Intelligent Power Device (IPD) without disturbing the wiring harness present in the vehicle. This approach makes it feasible to plug-in the solution for faster evaluation in a real time environment.

The solution is aimed at driving loads available in the passenger compartment, for example: defroster, central lock/unlock, fuel lid, wiper control, blower motor, and accessory cut-off. The IPD to a relay offers short circuit protection, built-in diagnostic function, undervoltage lock out, and active clamp operation at inductive load switch off.

The complete system is designed for 12V and can withstand the peak and nominal current of 30A and 15A consecutively.

Block Diagram
Recommended Products
  • Microcontroller: RL78/F13 (R5F10BGE)
  • IPD: UPD166038 (Dual Channel) 
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