Datasheet
DS_DD03S/D_03152012                E-mail: DCDC@delta.com.tw 
http://www.delta.com.tw/dcdc 
Input Characteristics 
Parameter  Model  Min.  Typ.  Max.  Unit 
5V Input Models  -0.7 
--- 
11 
12V Input Models  -0.7 
--- 
25 
24V Input Models  -0.7 
--- 
50 
Input Surge Voltage (1 sec. max.) 
48V Input Models  -0.7 
--- 
100 
5V Input Models  3.5 4 4.5 
12V Input Models  4.5 7  9 
24V Input Models  8 12 18 
Start-Up Voltage 
48V Input Models  16 24 36 
5V Input Models  --- 3.5 4 
12V Input Models  --- 6.5 8.5 
24V Input Models  --- 11 17 
Under Voltage Shutdown 
48V Input Models  --- 22 34 
VDC 
Reverse Polarity Input Current  ---  ---  1  A 
Short Circuit Input Power  --- 1000 1500 mW 
Internal Power Dissipation  ---  ---  2500  mW 
Conducted EMI 
All Models 
Compliance to EN 55022,class A and FCC part 15,class A 
Output Characteristics 
Parameter  Conditions  Min.  Typ.  Max.  Unit 
Output Voltage Accuracy 
--- ±0.5 ±2.0 % 
Output Voltage Balance 
Dual Output, Balanced Loads ---  ±0.5  ±2.0 
% 
Line Regulation 
Vin=Min. to Max.  ---  ±0.2  ±0.5 
% 
Load Regulation 
Io=10% to 100% 
--- ±0.2 ±0.5 % 
Ripple & Noise (20MHz)    ---  45  60  mV
 P-P
Ripple & Noise (20MHz)  Over Line, Load & Temp.  ---  ---  100  mV
 P-P
Ripple & Noise (20MHz)    ---  ---  15  mV rms 
Transient Recovery Time  ---  300  500  uS 
Transient Response Deviation 
25% Load Step Change 
--- ±3 ±5 % 
Temperature Coefficient    ---  ±0.01  ±0.02  %/℃ 
Over Load Protection  Foldback  120  TBD  ---  % 
Short Circuit Protection  Continuous 
General Characteristics 
Parameter  Conditions  Min.  Typ.  Max.  Unit 
I/O Isolation Voltage (rated)  60 Seconds  1500  ---  ---  VDC 
I/O Isolation Resistance  500 VDC  1000  ---  ---  MΩ 
I/O Isolation Capacitance  100KHz, 1V  ---  ---  150  pF 
Switching Frequency    ---  330  ---  KHz 
MTBF (calculated)  MIL-HDBK-217F@25℃, Ground Benign  1,000,000 ---  ---  Hours 
Safety Approvals  UL/cUL 60950-1 recognition(CSA certificate), IEC/EN 60950-1 
Recommended Input Fuse 
5V Input Models  12V Input Models  24V Input Models  48V Input Models 
1500mA Slow-Blow Type  700mA Slow-Blow Type  350mA Slow-Blow Type  135mA Slow-Blow Type 
Environmental Characteristics 
Parameter  Conditions  Min.  Max.  Unit 
Operating Temperature Range (with 
Derating) 
Ambient -40 +85 ℃ 
Case Temperature 
 --- +90 ℃ 
Storage Temperature Range 
 -50 +125 ℃ 
Humidity (non condensing)   
---  95  % rel. H 
Cooling  Free-Air convection 
Lead Temperature   
(1.5mm from case for 10Sec.) 
 --- 260 ℃ 
P2 




