Rev A

DCMSE02-HI SERIES

2 Watts

DC/DC Converter

Single and Dual Output

1/12/2017

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 •

Fax 603-778-9797

website: www.wallindustries.com • e-mail: sales@wallindustries.com

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TEST SETUP

Peak-to-Peak Output Noise Measurement Test

Use a Cout 0.47µF ceramic capacitor. Scope measurement should be made by using a BNC socket, measurement bandwidth is 0-20MHz. Position the

load between 50mm and 75mm from the DC/DC converter.

TECHNICAL NOTES

Maximum Capacitive Load

The DCMSE02-HI series has limitation of maximum connected capacitance at the output. The power module may be operated in current limiting mode

during start-up, affecting the ramp-up and the startup time. For optimum performance we recommend 100µF maximum capacitive load for dual outputs

and 330µF capacitive load for single outputs. The maximum capacitance can be found in data sheet.

Input Source Impedance

The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the power

module. In applications where power is supplied over long lines and output loading is high, it may be necessary to use a capacitor at the input to ensure

startup. Capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a good quality low Equivalent Series

Resistance (ESR < 1.0

Ω at 100KHz) capacitor of a 2.2µF for the 5V input devices, a 1.0µF for the 12V input devices and a 0.47µF for the 24V input

devices.

Output Ripple Reduction

A good quality low ESR capacitor placed as close as practicable across the load will give the best ripple and noise performance. To reduce output ripple,

it is recommended to use 3.3µF capacitors at the output.

Thermal Considerations

Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module and board spacing. To avoid

exceeding the maximum temperature rating of the components inside the power module, the case temperature must be kept below 90ºC. The derating

curves are determined from measurements obtained in a test setup.