Data Sheet
Table Of Contents
CODE:
 TYPE:
EN
 Tel. +48-14-610-19-40, fax: +48-14- 610-19-50, www.pulsar.pl, e-mail:sales@pulsar.pl
DC/DC 1A module of converter switching
DC/DC10SD v.1.0/III
DC/DC 1A Step down DC/DC converter with adjustable output voltage. 
DESCRIPTION  
19
The step down converter DC/DC 1A (DC/DC10SD) is used for step down the input voltage from the range between 
8V÷28V DC to the voltage range of 4,5V÷ V DC at the output, adjusted with the P1 potentiometer. The maximum load 
current is Imax=1A (Pmax=12W). The 3V difference between the input (lowered) and output voltage is required for the 
proper operation of the converter. The module does not feature galvanic isolation between input/output (IN-AUX) and 
operates on common "ground" (0V) potential (IN- and AUX- terminals are galvanically connected = common terminal).
Pulsar
®
The module’s features: 
·  Step down DC/DC converter with adjustable output voltage 
·  Example of use: step down from 24V to 12V DC 
·  The input voltage range: 8÷28V DC 
·  The output voltage range: 4,5÷19V DC 
·  The minimum difference between input (lowered) and output 
voltage: 3V 
·  The maximum load current 1A (12W) 
·  The PSU technical output indicating converter failure triggered 
by: 
· Short-circuit of the output 
· Output overload 
·  Protections: 
·  Short-circuit protection SCP 
·  Overload protection OLP 
·  OHP overheating protection 
·  High efficiency: 80÷93% 
·  Optical LED indication 
·  Warranty – 2 year from the production date 
·  Mounting: 
·  Mounting strip with adhesive tape 
·  Mounting screws 
The input voltage range 
8V÷28V DC 
depending on the range set by the jumper 
The output voltage range 
4,5V÷6V, 6V÷9V, 9V÷13V, 13V÷19V 
Jumper adjustable. 
Factory setting: 12V. 
The minimum difference between the input and 
output voltage 
3V 
P module power 
12W max. 
Energy efficiency 
80%÷ 90% for full range of power and loads 
Ripple voltage 
20mV p-p...50mV p-p 
Output current 
1A max. 
Current consumption by module systems 
10 mA max. 
Short-circuit protection SCP and overload 
protection OLP 
180% - 200% of module power - output power limit, 
automatic return after elimination of short circuit 
Technical outputs 
- PSU output indicating failure 
- OC type, 50mA max. Failure status: hi-Z state (high 
impedance), normal status: L level (0V) 
Optical indication 
- IN LED indicating DC power status 
- AUX LED indicating DC supply status at the output 
- PSU LED indicating failure 
- red, normal status: is lit continuously 
- green, normal status: is lit continuously 
- red, normal status: does not lit, failure: is lit continuously 
Operating conditions 
II environmental class, -10°C ÷40°C, ensure air flow 
around the unit for convection cooling 
Dimensions 
L=80, W=43, H=27 [+/- 2mm] 
Net/gross weight 
0,04/0,06 kg 
Mounting 
mounting tape or mounting screw x 2 
Declaration, warranty 
CE, 2 year from the production date 
L
H
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