3000W BCA Bi-directional DC-DC Converter

The 3,000 Watt 48S12.3K0BCA Bi-directional non-isolated DC/DC converter provides a complete solution for in-vehicle power distribution with 12V/48V battery configurations for a variety of applications including micro and mild hybrid automotive systems. The bi-directional DC/DC converter charges a low side (12V) battery during normal operation (buck mode) and charges or assists the high voltage (48V) battery in emergency situations (boost mode). The bidirectional DC/DC converter operates more as an ideal current source with variable direction, thus allowing energy transfer between two voltage domains. Voltage feedback maintains the output voltage within the acceptable operating range and eventually allows a custom charging profile for the battery pack. It regulates the average current flowing between the high voltage and low voltage ports in the direction selected via CAN interface. It is packaged in an unprecedented low profile 8.67” x 6.14” x 1.008”” mechanically enclosed package weighing only 3.04 lbs. The package makes the unit ideal for harsh shock and vibration requirements as well as easy integration with a battery pack. Three M8 bushings are provided two for power connection and two for ground connections.


• 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

Functional Features

The 48S12.3K0BCA is fully controlled via CAN interface. It uses a high speed CAN-Transceiver (TLE7251VSJ) for communication with the microcontroller. It provides control of the PWM control ICs, and protection and monitoring of the current and temperature monitoring features. The converter operates in buck, boost and pre-charge mode. The 48S12.3K0BCA includes a disconnect switch based on a back to-back N MOSFET configuration for both low side (12V battery) and high side (48V battery).The converter has reverse voltage protection, short circuit protection as well as low standby current. The design includes a CAN 2.0b interface for complete control of the converter as well as monitoring LS and HS voltage and current and internal temperature of the converter. The 48S12.3K0BCA is designed to operate in wide operational temperature range. Through holes in the base plate are provided to allow easy mounting or the addition of a heatsink or cooling plate for extended temperature operation. The converter’s high efficiency and high power density are accomplished through the use of high-efficiency synchronous rectification technology, advanced electronic circuitry, and leading edge packaging and thermal design. This results in a highly reliable product. The diode emulation mode of the synchronous rectifiers prevents negative currents, but also enables discontinuous mode operation for improved efficiency with light loads. The converter operates at a fixed frequency and follows conservative component de-rating guidelines.

More information about the product can be found here – datasheet