Bi-directional DC/DC Converter for 12V/48V EV/HEV Systems

As electric vehicles (EVs) and hybrid electric vehicles (HEVs) gain popularity, there's a growing demand for efficient energy management and dual-voltage systems to transfer energy between 12V and 48V power nets. Renesas bi-directional DC/DC converter is ideal for 48V mild hybrid electric vehicles and electric motorcycles, featuring a highly efficient 12V/48V DC/DC converter. The design consists of an LV148¹ board net and supports functional safety².

System Benefits​:

• Multi-phase DC/DC system delivers over 3kW between 12V and 48V board nets at over 95% efficiency.
• Bi-directional analog controller eliminates the need for DSP with complicated firmware, separate buck/boost controllers, and complex switching logic, reducing development time, BOM, and costs.
• Supports ASIL B automotive safety standard under ISO26262 with Renesas MCU and regulator.

1. LV148 refers to automotive 48V power supply standards by German automakers.
2. Functional safety should be assessed on the customer system.