NDS Series

5

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+353 61 225 977

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+1 408 785 5200

© 2016 Bel Power Solutions & Protection

BCD.00013_AD

17-Oct-2016

TYPICAL CHARACTERISTIC CURVES

This series of converters does not require any external components for proper operation. However, if the distribution of the input

voltage to the converter contains significant inductance, a capacitor across the input terminals may be required to stabilize the

input voltage. A minimum of 1

μF, quality electrolytic / ceramic capacitor is recommended for this purpose. For output decouplingit

is recommend connecting a 1

μF ceramic capacitor directly across the output pins of the converter.

8.1

The remote control pin functions as a normal soft shutdown. It is referenced to the –Vi pin. With positive logic, when the

remote control pin is pulled low, the output is turned off and the unit goes into a very low input power mode. An open

collector switch is recommended to control the voltage between the remote control pin and the –Vi pin of the converter.

The remote control pin is pulled up internally, so no external voltage source is required. The user should avoid connecting

a resistor between the remote control pin and the +Vi pin. The user must take care to ensure that the pin reference for the

control is connected close to the –Vi pin. The control signal must not be referenced ahead of EMI filtering, or remotely from

the unit. If the remote control pin is not used, it can be left floating.

8.2

The converter is designed for natural or forced convection cooling. The output power of the converter is limited by the

maximum case temperature (Tc). To ensure reliable long term operation of the converters, and to comply with safety

agency requirements,

Bel Power Solutions limits max. allowable case temperature (Tc) to 100 °C; see Mech. Drawing.

8.3

Paralleling of two converters is not possible.

8.4

When the output is overloaded above the maximum output current rating, the voltage will start to reduce to maintain the

output power to a safe level. In a condition of high overload or short-circuit, where the output voltage is pulled below

approximately 30% of Vo.Nom, the unit will enter a ‘Hiccup’ mode of operation. Under this condition the unit will attempt

to restart, approximately every 25 ms, until the overload has cleared.