Datasheet
DANUBE 
http://www.danube.com.tw 
2009/06/04 
4
z  TYPICAL PERFORMANCE CURVES 
Specifications typical at TA=25
 O
C, nominal input voltage , rated output current unless otherwise specified. 
DERATING CURVE  EFFICIENCY VS LOAD 
0%
25%
50%
75%
100%
125%
-25 0 25 50 70 100
TA(degree C)
OUTPUT POWER(%)
0.0
20.0
40.0
60.0
80.0
0 20406080100
% OF RATED LOAD(%)
EFFICIENCY(%)
z  INPUT
 FUSE SELECTION GUIDE 
4.5-5.5V 
INPUT VOLTAGE(VDC) 
10.8-13.2V 
INPUT VOLTAGE(VDC) 
21.6-26.4V 
INPUT VOLTAGE(VDC) 
500mA Slow-Blow Type  250mA Slow-Blow Type  100mA Slow-Blow Type 
DC-DC
CONVERTER
+Vin
-Vin
+Vout
-Vout
OUTPUT
Fuse
INPUT
Note: Certain applications may require the installation of external fuse in front of the input. 
PR SERIES APPLICATION NOTES: 
EXTERNAL CAPACITANCE REQUIREMENTS: 
No external capacitance is required for operation of the PR series. 
To meet the reflected ripple requirements of the converter, an input impedance of less than 0.5 ohm 
from DC to 250KHz is required. 
External output capacitance is not required for operation, however it is recommended that 10uF 
tantalum and 0.1uF ceramic capacitance be selected for reduced system noise. 
Additional output capacitance may be added for increased filtering, but should not exceed 100uF.   
We Can Offer EMC-Filter According To EN55011/22 Class B. 
Negative Outputs: 
A negative output voltage may be obtained by connecting the +OUT to circuit ground and 
connecting –OUT as the negative output.   
FOR MORE INFORMATION CALL: 
Danube Enterprise Co., Ltd. 
Tel: 886-7-3755165  Fax: 886-7-3755330  E-mail: danube@ms10.hinet.net 
Home Page  http://www.danube.com.tw 
SAFE 
OPERATING 
AREA 




