40w dc-dc converter achieves high power density in a compact package

May 7, 2026

The MJWI40 series from MINMAX provides 40W of power in a compact encapsulated package, offering high power density and efficiency for space-constrained industrial and energy applications.

MINMAX has introduced the MJWI40 series, 40W isolated dc-dc converters designed for modern applications demanding higher power density in a compact package. The converters feature a power density of 89W/in3 within an encapsulated 1” x 1” footprint – allowing for space optimization in server power supplies and communication equipment.

 

Compared with the previous-generation 2” × 1” footprint, the MJWI40 series fits a compact 1” × 1” package, cutting the projected area by 50% while maintaining the same output power. Within this 1” × 1” footprint, MINMAX has scaled output power from 10W to 40W, providing a straightforward upgrade path: customers can boost system capability by simply replacing the dc-dc converter, minimizing PCB changes.

 

The MJWI40 series is housed in a shielded metal case with an insulated baseplate and features high efficiency of up to 93%, with an optional heatsink, facilitating heat dissipation in demanding environments.

 

The converters provide fully regulated single or dual output voltages. Remote on/off control and output voltage trim functionality comes included, as well as integrated protection mechanisms covering under-voltage lockout (UVLO), overload, over-temperature, and short-circuit conditions.

Features

  • I/O isolation rated at 1500V dc
  • Start-up time: 30ms
  • No minimum load requirement
  • Low no load power consumption
  • Input surge voltage: 50V dc or 100V dc
  • Wide operating temperature range

Applications

  • Server power supplies
  • Communication infrastructure
  • Electric vehicle chargers
  • Battery-operated equipment
Extra_Minmax_MJWI40

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