Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833

603-778-2300 www.wallindustries.com Fax 603-778-9797

CMCG Series

30 Watt Single Output

2:1 Input Voltage Range

Chassis Mount DC/DC Converter

Rev. B

Over Current Protection

To provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure current

limiting for an unlimited duration. At the point of current-limit inception, the unit shifts from voltage control to current control. The unit

operates normally once the output current is brought back into its specified range.

Output Over Voltage Protection

The output over voltage clamp consists of control circuitry, which is independent of the primary regulation loop that monitors the voltage on

the output terminals. The control loop of the clamp has a higher voltage set point than the primary loop. This provides a redundant voltage

control that reduces the risk of output over voltage. The OVP level can be found in the “Output Voltage / Current Rating Chart.”

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

105°C. The derating curves are determined from measurements obtained in an experimental apparatus

.

Efficiency vs Input Voltage

Efficiency vs Output Load

DERATING CURVE