MagI³C WPME-FIRM Fixed Isolated Regulator Modules

Introduction

Würth Elektronik’s MagI³C WPME-FIRM family comprises fully integrated, functionally isolated DC-DC regulator modules for converting a 9 V to 36 V input into a regulated 5 V rail. The modules combine the switching power stage, control circuitry, transformer, and capacitors in a single package, providing up to 6 W of output power or 1.2 A output current.

The family is offered in two distinct formats: a compact SIP-8 version and a metal-housed DIP-24 version. This gives designers a choice between a smaller footprint and a larger housed module with different ripple, transient, temperature, and emissions characteristics.

What it does

The WPME-FIRM modules provide a regulated 5 V DC output from nominally wide-range DC inputs between 9 V and 36 V. Functional isolation separates the input and output sides, with typical isolation capacitance specified at 1000 pF.

Both formats include undervoltage, overcurrent, and continuous short-circuit protection. Efficiency is specified at up to 82%, supporting use where a compact isolated supply is needed without assembling the switching stage, transformer, control circuitry, and associated capacitors from discrete components.

The SIP-8 module is specified for operation from -40°C to +105°C, with 1.6 kVDC functional isolation for 60 seconds. At full load, it has typical 30 mV output ripple and 1% output-voltage accuracy. The DIP-24 module operates from -40°C to +85°C, has 1.5 kVDC functional isolation for 60 seconds, and specifies typical 7 mV peak-to-peak output ripple and 1% output-voltage accuracy at full load. The DIP-24 version also supports input transients up to 50 V for up to one second.

Applications

Potential uses that follow from the modules’ regulated, isolated 5 V output and 9 V to 36 V input range include:

• Providing an isolated 5 V rail from 12 V, 24 V, or 36 V DC system supplies
• Isolated power domains in industrial electronics
• Supplying 5 V control, sensing, or interface circuitry that requires functional isolation
• Compact embedded systems needing a protected DC-DC regulator module
• Designs where the choice of SIP-8 or metal-housed DIP-24 packaging supports different mechanical and electrical integration needs

Design considerations

Package selection materially affects the available characteristics. The SIP-8 module measures 22.0 mm × 12.0 mm × 9.5 mm and is specified for EN55032 Class B conducted and radiated emissions. The DIP-24 module measures 32.0 mm × 20.0 mm × 10.8 mm and uses a metal housing.

For emissions planning, the DIP-24 version is specified for EN55032 Class A conducted and radiated emissions without an external filter. Class B conducted emissions require an additional external filter. Designers can also consider the lower specified full-load ripple of the DIP-24 version against its larger package and lower maximum ambient-temperature rating.

Both versions provide functional—not otherwise stated as safety—isolating behavior, so the stated isolation ratings and intended system requirements should be reviewed carefully during power-domain and compliance design. The DIP-24 module’s UL62368-1 certification status is listed as pending.

Availability and further information

The source/distributor and datasheet links provided on this page offer further information on the MagI³C WPME-FIRM fixed isolated regulator modules, including detailed electrical characteristics, package information, and integration guidance.