Battery Show: Bel shrinks 4kW vehicle accessory dc-dc converter in second generation

Author: EIS Release Date: Sep 18, 2023

Bel Fuse has released a second generation of its kW-class dc-dc converter for powering accessories from an electric or hybrid vehicle battery.

 

Bel Fuse eMobility dcdc converter

Rated at 4kW, 700DNG40-24-8 is smaller and, at 450 to 900Vdc, operates over a wider input voltage range than its 700DNC40-24-8G predecessor.

 

Size is 285 x 55 x 355mm including protrusions, and it weighs 4.5kg.

 

 

The galvanically-isolated output is 28V at up to 143A, and can be trimmed across 20-30V via CAN but with 10bit resolution. Up to eight can be paralleled for more current.

 

 

Efficiency is up to 94% (700Vdc in, 28Vout, 143A load).

 

To dump heat, the PSU needs to be plumbed into a liquid circuit, requiring an anti-freeze/water mixture at 10-20 litre/min at up to +65°C (+85°C with reduced electrical output).

 

Protections include output over-current, over-temperature, output over-voltage and reverse-polarity.

 

Sealing is to IP67 and IP6k9k

 

Applications are foreseen in construction, mining and marine equipment, as well as on and off-highway vehicles.

 

The company will be at the Battery Show North America next week (12-14 September, stand 936).