Rev B

DCMJU10 SERIES

10 Watt DC/DC Power Converters

05/16/2017

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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DESIGN & FEATURE CONSIDERATIONS

Output Ripple Reduction

A good quality low ESR capacitor placed as close as possible across the load will give the best ripple and noise performance.

To reduce output ripple, it is recommended to use 4.7µF 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 100°C. The derating curves are determined from measurements obtained in a test setup.

TEST CONFIGURATIONS

Input Reflected-Ripple Current Test Setup

Input reflected-

ripple current is measured with an inductor Lin (4.7µH) and Cin (220µF, ESR < 1.0Ω at 100 KHz) to simulate

source impedance. Capacitor Cin offsets possible battery impedance. Current ripple is measured at the input terminals of the

module. Measurement bandwidth is 0-500 KHz.

Peak-to-Peak Output Noise Measurement Test

Use a 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.