DCMJU10 Datasheet, PDF (4/6 Pages) Wall Industries,Inc. – 10 Watt DC/DC Power Converters

Wall Industries, Inc.
Rev A
DCMJU10 SERIES
10 Watt DC/DC Power Converters
DERATING CURVES
Derating Curve without Heatsink
120
100
80
60
40
20
0
-40
Natural Convection
100LFM
200LFM
400LFM
0
20
40
60
80
Ambient Temperature (°C)
100
120
120
100
80
60
40
20
0
-40
Derating Curve with Heatsink
Natural Convection
100LFM
200LFM
400LFM
0
20
40
60
80
Ambient Temperature (°C)
100
120
DESIGN & FEATURE CONSIDERATIONS
Remote On/Off
Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin and off during a logic low. To
turn the module on and off, the user must supply a switch to control the voltage between the on/off terminal and the –Vin terminal.
The switch can be an open collector or equivalent. A logic low is 0V to 1V. A logic high is 2.5V to 50V. The maximum sink current at
on/off terminal during a logic low is -500µA. The maximum allowable leakage current of the switch at on/off terminal (2.5V to 50V) is
500µA.
Over Current Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can
endure overload 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.
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.
A 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 6.8µF for the 24V and 48V devices.
+
DC Power
Source
-
+Vin
+
DC/DC
Converter
Cin
-Vin
+Out
-Out
Load
Maximum Capacitive Load
The DCMJU10 series has a limitation of maximum connected capacitance on the output. The power module may be operated in
current limiting mode during start-up, affecting the ramp-up and the start-up time. The maximum capacitance can be found in the
model selection table.
11/27/2013
Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: [phone] • Toll Free: 888-597-9255 • Fax [phone]
website: www.wallindustries.com • e-mail: [e-mail]
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