Overview

Description

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 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.

Comparison

Applications

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16:9 Phase 1 - 6 Phase 6 Phase 6 Phase 6 Phase 5 Phase 5 Phase 5 Phase 4 Phase 4 Phase 4 Phase 3 Phase 3 Phase 3 Phase 2 Phase 2 Phase 2 Phase 1 Phase 1 Phase 1 AS218 AS218 AS218 N-Channel MOSFET 1 N-Channel MOSFET N-Channel MOSFET Half-Bridge Driver Half-Bridge Driver Half-BridgeDriver 48V Battery 48V Battery 48V Battery 48V Battery 48V Battery 48V Battery 48V Battery 48V Battery 48V Battery Bidirectional PWM Bidirectional PWM Bidirectional PWM MCU MCU MCU Regulator Regulator Regulator 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery 12V Battery Connector Line CAN CAN CAN Connector Line.81 Connector Line.83 Connector Line.84 Connector Arrow Connector Line.88 Connector Line.89 Connector Line.90 Connector Line.97 N-Channel MOSFET 2 N-Channel MOSFET N-Channel MOSFET Connector double arrow Evaluation Kit Evaluation Kit Evaluation Kit Starter Kit Starter Kit Starter Kit Connector double arrow.101 Connector Arrow.102 PWM PWM PWM 12C/PMBus I2C/PMBus I2C/PMBus Sheet.44
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