Description:TheMJWI10 series are cost optimized DC-DC converter modules offering 10W output power in a 1"x1"x0.4" shielded metal package with industry standard pinout. All models provide ultra-wide 4:1 input voltage range and fixed output voltage regulation. State-of-the-art circuit topology provides a high efficiency up to 87% which allows an operating temperature range of -40℃ to +80℃.
The recommended PCB layout for optimal thermal performance involves placing the converter on a multi-layer PCB with a solid ground plane, using thermal vias to dissipate heat, and keeping the PCB area around the converter clear of components to ensure good airflow.
To ensure reliable start-up and shutdown, ensure that the input voltage rises and falls monotonically, and that the input voltage is within the specified range during start-up and shutdown. Additionally, add a soft-start circuit to limit the inrush current.
The derating curves for the converter's output power and efficiency at high temperatures can be obtained from the manufacturer or through testing. As a general guideline, the output power derates by 1-2% per degree Celsius above 50°C, and the efficiency derates by 0.5-1% per degree Celsius above 50°C.
To protect the converter from input voltage transients and surges, add a TVS (transient voltage suppressor) diode or a varistor in parallel with the input voltage, and consider adding a fuse or a current limiter to prevent overcurrent conditions.
The recommended input capacitor type is a low-ESR ceramic or film capacitor with a value of 10-22 μF, depending on the input voltage and frequency. The capacitor should be placed as close as possible to the converter's input pins.
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MJWI10-24S05 Overview
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