
DC-DC CONVERTER 
10 ~ 12W
FDD12 SERIES 
SPECIFICATION 
All Specifications Typical At Nominal Line, Full Load, 25
GENERAL SPECIFICATION 
* Switching frequency: ......................... 
* Isolation voltage: .............................. 
* Isolation resistance: .......................... 
* Operating ambient temperature: ......... 
* Storage temperature: ........................ 
* Max. Case temperature: ..................... 
* M.T.B.F.: .......................................... 
* Cooling: ............................................ 
* Transient recovery time: ..................... 
* Temperature coefficient: ..................... 
* Dimension: ....................................... 
INPUT SPECIFICATIONS 
* Input voltage range : ..........................
* Input filter: ....................................... 
* No load input current: ......................... 
* Max. Input voltage: ............................ 
OUTPUT SPECIFICATIONS 
* Output voltage accuracy: ................... 
* Minimum load: .................................. 
* Line regulation: ................................ 
* Load regulation: ............................... 
* Ripple & noise: ................................. 
* Efficiency: ........................................ 
* Derating: ......................................... 
* Case material: .................................. 
CONTROL AND PROTECTION 
* Input reversed: ................................. 
* Output short circuit: .......................... 
CHINFA ELECTRONICS IND., CO. LTD. 
ISO 9001 Certified 
www.chinfa.com 
sales@chinfa.com 
 Unless Otherwise Noticed
℃
200KHz (typ.) 
1,500VDC 
100M 
(min.) 
-25 to +71
℃
-40 to +100
℃
100
℃
661,000Hrs at @ GF40, according to MIL-HDBK-217F 
Free air convection 
500μS, 25% load step change 
±
0.02% / 
℃
50.8 x 50.8 x 12mm
10 ~ 36VDC for 24V 
18 ~ 72VDC for 48V 
Pi type 
20mA for 24V in 
15mA for 48V in 
40VDC for 24V in 
75VDC for 48V in 
±
2% at Vo_nom 
No load for single output models 
±
20% at Vo_nom for dual output models 
±
1% at Vo_nom 
±
2% at Vo_nom for single output models 
±
5% at Vo_nom for dual output models 
±
1% Vout 
100mV (max.) for 3.3 Vout 
Up to 77%, see model list 
See table 1 
Metal 
Shunt diode use external fuse 
Continuous