
T E C H N I C A L S P E C I F I C AT I O N
All specifications are typical at nominal input, full load and 25oC otherwise noted
OUTPUT SPECIFICATIONS
Output power
1.5 Watts max
Voltage accuracy      Full load and nominal Vin 
± 4%
VER:03     1  /  2
1.5 WATTS REGULATED OUTPUT POWER 
LOW OUTPUT RIPPLE & NOISE 
PI TYPE INPUT FILTER 
500VDC ISOLATION VOLTAGE 
HIGH EFFICIENCY UP TO 55% 
STANDARD 24 PIN DIP PACKAGE & SMD TYPE PACKAGE
 FIVE-SIDED EMI SHIELD
The DR1P5 series offer 1.5 watts of output power from a package in an IC compatible 24 
pin DIP configuration without derating to 71oC ambient temperature and pin to pin 
compatible to MKC03 series. DR1P5 series have input voltage of 4.5-5.5, 10.8-13.2 and 
21.6-26.4VDC. DR1P5 features 500VDC of isolation voltage. A safety designed meet to 
EN60950-1 and UL60950-1. All models are particularly suited to telecommunications, 
industrial, mobile telecom and test equipment applications. 
Minimum load          
0%
Line regulation        LL to HL at Full Load 
± 0.3%
± 1.5%
± 0.5%
± 5%
Load regulation        25% to 100% FL 
D05 output
others 
Cross regulation 
Asymmetrical load 25% / 100% FL 
Ripple and noise      20MHz bandwidth 
50mVp-p
Temperature coefficient 
Short circuit protection
INPUT SPECIFICATIONS
Input voltage range
Input filter
±
0.02% / oC, max
Short term
5V nominal input  
12V nominal input 
24V nominal input 
4.5 – 5.5VDC
10.8 – 13.2VDC
21.6 – 26.4VDC
Pi type
GENERAL SPECIFICATIONS
Efficiency 
See table
Isolation voltage 
500VDC, min
10
9
ohms, min
Isolation resistance 
Isolation capacitance 
30pF, max
Switching frequency 
Design meet safety standard 
20KHz, min
IEC60950-1, UL60950-1,EN60950-1
Case material 
Nickel-coated copper
Base material 
Non-conductive black plastic
Potting material 
Epoxy (UL94-V0)
1.25 X 0.80 X 0.40 Inch
(31.8 X 20.3 X 10.2 mm)
Dimensions 
Weight  
DIP 
SMD 
16g (0.55oz)
18g (0.62oz)
5.531 x 10
6
 hrs
MTBF (Note 1) 
ENVIRONMENTAL SPECIFICATIONS
Operating temperature range 
-25oC ~ +71oC
Maximum case temperature 
Storage temperature range
+100oC
-55oC ~ +105oC
Thermal impedance 
Thermal shock
Nature convection 
20oC/watt
MIL-STD-810D
Vibration 
10~55Hz, 10G, 30minutes along X,Y and Z
Relative humidity 
EMC CHARACTERISTICS
5% to 95% RH
Conducted emissions 
EN55022 
Class A
Radiated emissions 
EN55022 
Class A
ESD 
EN61000-4-2 
Perf. Criteria B
Radiated immunity 
EN61000-4-3 
Perf. Criteria A
Fast transient 
EN61000-4-4 
Perf. Criteria B
Surge 
EN61000-4-5 
Perf. Criteria B
Conducted immunity 
EN61000-4-6 
Perf. Criteria A
DR1P5-24S05 Derating Curve 
O
50 60 70 80 90 100 
-40 
0 
-25 
AMBIENT TEMPERATURE (oC) 
0 
-10 
Nature convection 
100 
75 
50 
25