Rev A

DCMA01-HI SERIES

1 Watt

DC/DC Converter

Single and Dual Output

10/14/2016

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 0.33µF 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.

TERMINAL BLOCK OPTIONS

Maximum Capacitive Load

The DCMA01-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. The maximum can be found in the 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 <1.0Ω at 100KHz) capacitor of a 2.2µF for the 5V input

devices, a 1.0µF for the 12V, 15V input devices and a 0.4µF for the 24V 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 1.0µF 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 100ºC. The derating curves are determined from measurements obtained in a test setup.