Calex – High-Efficiency 3,000 Watt Bi-directional DC/DC Converter for In-Vehicle 12V/48V Power Distribution (05/2024)

The 3,000 Watt 48S12.3K0BCA Bi-directional non-isolated DC/DC converter offers a comprehensive solution for in-vehicle power distribution with 12V/48V battery configurations, suitable for various applications including micro and mild hybrid automotive systems. This bi-directional converter operates in two modes: during normal operation (buck mode), it charges the low-side (12V) battery, while in emergency situations (boost mode), it charges or supports the high-voltage (48V) battery.

Functioning as an ideal current source with variable direction, the converter enables efficient energy transfer between two voltage domains. Voltage feedback ensures the output voltage remains within an acceptable operating range, allowing for a custom charging profile for the battery pack. The average current flow between the high and low voltage ports is regulated in the direction specified via a CAN interface.

The unit is housed in a compact, low-profile mechanical enclosure measuring 8.67” x 6.14” x 1.008” and weighs only 3.04 lbs. This packaging is designed to withstand harsh shock and vibration conditions, making it ideal for integration with a battery pack. It features three M8 bushings: two for power connections and one for ground connections.

Features:

• Automotive 12V/48V Battery System
• Buck, boost and precharge modes of operation
• Low Side (LS): 12V Input Voltage Range: 6V to 18V
• High Side (HS): 48V Input Voltage Range: 24V to 58V
• Overcurrent, Overvoltage, & Over-temperature Protection. All protections are latching.
• Disconnect switch LS (12V) and HS (48V)
• Reverse polarity protection
• Constant Voltage and Constant Current Mode
• Average Current Mode Control
• Custom Charging Profile for the Battery Pack
• LS and HS Current Monitoring
• Internal temperature monitoring
• High power density
• Low profile 1”
• Efficiency up to 96.5%
• Dimensions 8.67” x 6.14” x 1.008”
• Weight 3.04 lb (1.38 Kg)
• Excellent thermal performance
• Constant switching frequency
• CAN 2.0b Interface including remote ON/OFF
• Good shock and vibration damping
• Highly Integrated Solution
• RoHS Compliant