1KW-DCDC-48V12V (#1): Bidirectional 48V to 12V Converter

Summary

As dual board net systems (vehicles with both a 12 V and 48 V bus) increase in popularity, high power, bidirectional 48 V to 12 V DC/DC converters have become key building blocks in the architecture of today’s automobiles.

To optimize overall vehicle efficiency, energy must be transferred in either direction between the 12 V and 48 V batteries, depending on the vehicle’s electrical demands and the state of the batteries’ health, which can be achieved with this converter design.

This 1 kW, 48 V to 12 V buck-boost converter features two modular power stages capable of 500 W each. Symmetrical interleaving of both phases reduces the current ripple, while each phase is equipped with protection MOSFETs that can isolate the phase in case of failure and limit inrush current.

The converter can automatically switch between buck and boost operation, while its switching frequency of 185 kHz leads to a compact form factor.

FEATURES

• Bidirectional 48 V to 12 V converter

• 2-phase interleaved operation

• Automatic buck and boost selection

• Voltage and current regulation

• Inrush current control

• Overvoltage protection

• Overcurrent protection

Specifications

Manufacturer	Vishay Dale
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	541-1KW-DCDC-48V12V-ND
Eval Board Supplier	Vishay Dale
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	12 V
Current Out	83 A
Voltage In	36 ~ 56 V
Efficiency @ Conditions	- Not Given
Voltage Out Range	- Fixed
Features	Current Limit (Adj. or Fixed) Fault Indication Over Current Protection Over Voltage Protection
Switching Frequency	185 kHz
Standby Current [Typical]
Quiescent Current [Typical]
Component Count + Extras	336 + 12
Internal Switch	No
Design Author	Vishay Dale
Application / Target Market	Automotive: Bidirectional 48V/12V Networking RF: Base Stations Servers Telecom
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part	SiC464
Date Created By Author	2024-02
Date Added To Library	2024-03