750 W Bi-Directional DC/DC Converter for 12V/48V Automotive Power Distribution

The 48S12.750BCE is a powerful 750 W bi-directional DC/DC converter designed for modern 12V/48V automotive battery systems. It provides a complete solution for in-vehicle power distribution and is especially suitable for micro hybrid and mild hybrid vehicle applications. The non-isolated converter enables efficient energy transfer between 12V and 48V voltage domains, supporting flexible and reliable power management in demanding automotive environments.

Efficient Energy Transfer Between 12V and 48V Systems

In normal operation, the converter charges the low-side 12V battery from the 48V system in buck mode. In emergency or support situations, it can charge or assist the high-voltage 48V battery in boost mode. This makes the 48S12.750BCE an ideal solution for applications where controlled energy flow between two battery domains is required.

The converter operates as an ideal current source with variable direction, allowing energy to move efficiently between voltage domains. Integrated voltage feedback maintains the output voltage within the acceptable operating range and can support a customized charging profile for the battery pack.

High Efficiency for Automotive Applications

With an efficiency of up to 96.7% at full load in buck mode and 95.8% at full load in boost mode, the 48S12.750BCE is engineered for high-performance automotive power systems. Its high efficiency helps reduce power losses and supports reliable energy management in vehicle electrical architectures.

The product includes protection against overcurrent, overvoltage and over-temperature, as well as reverse polarity protection, constant voltage and constant current mode, average current mode control, internal temperature monitoring and disconnect switches for the low-side and high-side battery domains.

Robust Design with IP67 Protection

Designed for demanding automotive environments, the 48S12.750BCE DC/DC converter combines high power density with excellent thermal performance. The converter features IP67 protection when mating connectors are installed, making it suitable for applications where dust, moisture and environmental robustness are important.

Its compact mechanical design measures 123 × 177 × 44.5 mm without connectors and weighs only 1.34 kg. With connectors installed, the case dimensions are 141.5 × 177 × 44.5 mm. The module uses a brushed steel cover and supports mounting with M6 or ¼-20 screws.

Key Benefits

• 750 W power rating for modern automotive power systems
• Bi-directional energy transfer between 12V and 48V battery domains
• Buck and boost operation for flexible system integration
• Up to 96.7% efficiency in buck mode
• CAN 2.0b interface including remote ON/OFF functionality
• IP67 protection with mating connectors installed
• Compact and lightweight design for space-constrained vehicle platforms
• Overcurrent, overvoltage and over-temperature protection
• Reverse polarity protection and internal temperature monitoring

Typical Applications

The 48S12.750BCE 750 W bi-directional DC/DC converter is suitable for a wide range of automotive and in-vehicle power distribution applications, including:

• Micro hybrid vehicles
• Mild hybrid vehicles
• 12V/48V vehicle battery architectures
• In-vehicle power distribution systems
• 12V battery charging from a 48V system
• 48V battery support via boost operation
• Automotive power management systems

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