2500 series
Single, Dual, Triple Output
DC/DC Converter
F
EATURES
•
•
•
•
•
•
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www.martekpower.com
6 sided Continuous Shielding
Synchronization and Output Trim
Efficiency to 86%
Wide 2:1 Input Voltage Range
Input Pi Filter
UL 1950 Approved
CSA 22.2 Approved
D
ESCRIPTIONS
The 2500 series is a family of compact 25W, high
performance DC/DC converters which offer a wide variety of
standard input/output voltage combinations. The 2100 series
operate over 2:1 input ranges of 9 to 18, 18 to 36 or 36 to 72
VDC; providing single, dual or triple output combinations of
5, 6, 12, 15, ±5, ±12, ±15, 5±12 and 5±15 VDC. All models have
been approved to UL 1950 and CSA 22.2 safety standards.
Optional features allow these converters to be connected
in a cascaded configuration (to extend the input voltage
range from 2:1), or parallel operation.
I
NPUT
C
HARACTERISTICS
Min Typ Max Unit/Comments
Input Voltage Range
12 VDC Input Models
9
12
24 VDC Input Models
18 24
48 VDC Input Models
36 48
Over Voltage Shutdown
12 VDC Input Models
20
24 VDC Input Models
40
48 VDC Input Models
74
Remote On / OFF Control
Supply ON
Supply OFF
Logic Referenced to Negative Input
Reverse Polarity Input Current
Input Filter
Input Fuse Rating
18
36
72
VDC
VDC
VDC
VDC
VDC
VDC
5.5 VDC or Open Circuit
0 VDC to 0.8 VDC
12
Amp
Pi Filter
See Model Selection
Guide
O
UTPUT
C
HARACTERISTICS
Min Typ Max Unit/Comments
Output Voltage Accuracy
Single & Dual Outputs
Triple Outputs - Primary
- Auxiliaries
Output Voltage Adjustment
Voltage Balance:
Dual Outputs
Triple Outputs (Auxiliaries)
Minimum Load
Line Regulation
Single Outputs
Dual Outputs
Triple Outputs - Primary
- Auxiliaries
Load Regulation
Single Outputs
Dual Outputs
Triple Outputs - Primary
- Auxiliaries
Ripple/Noise
5V Outputs
12V and 15V Outputs
Short Circuit Protection
Temperature Coefficient
Over Voltage Protection
±1.0
±1.0
±5.0
±5.0
%
1
%
1
%
1
%
1
±0.5 ±1.0 %; Equal Output Loads
±50 ±100 mV; Equal Output Loads
10% Full Load
±0.2
±0.4
±0.2
±1.0
±0.5
±1.0
±0.5
±5.0
%
2
%
2
%
2
%
2
%
3
%
3
; Equal Loads
%
3
%
3
; Equal Loads
G
ENERAL
C
HARACTERISTICS
Switching Frequency
Isolation Voltage
Isolation Resistance
MTBF (MIL-HBK-217F)
Min Typ Max Unit/Comments
kHz
100
VDC, 1 minute
500
Mohm, 500VDC
1000
Thousand Hours,
700
+25
o
C, Ground
Benign
±0.5
±0.5 ±1.0
±0.5 ±1.0
±5.0
75 mV; p-p, Nom.Line FL,
20Mhz B.W. using
1
µf
bypass capacitor
1 % of Vout
Continuous, Auto-
matic Recovery
±0.02 % per
o
C
See Model Selection
Guide
1
2
3
= Output voltage at nominal line & FL
= Output voltage measured from minimum input line to maximum
= Output voltage measured from FL to 10% Load
Martek Power reserves the right to change specifications without notice.
B-120
E
NVIRONMENTAL
S
PECIFICATIONS
Operating Temp. Range
Storage Temp. Range
Relative Humidity
Cooling
Min
-40
-40
Typ Max
+75
+125
95
Unit/Comments
o
C; Ambient
o
C
% Humidity; non-
condensing
Free-Air Convection
P
HYSICAL
C
HARACTERISTICS
Case Size
Case Material
Shield Connection
12V and 24V Input Models
48V Input Models
Flammability
Weight
Unit/Comments
2.56 X 3.0 X 0.75 inches
(65.0 X 76.2 X 19.0 mm)
Coated Metal with Non-
Conductive Base
Negative Input, Pin 3
Positive Input, Pin 2
UL94V-0
227 Grams
O
UTLINE
D
RAWING
2.56 (65.0)
0.40 0.40 0.40 0.50 0.30 0.30
(10.2) (10.2) (10.2) (12.7) (7.6) (7.6)
0.20
(5.1)
0.25 MIN.
(6.3)
10
9
8
1.00
(25.4)
7
6
5
BOTTOM
3.00
(76.2)
1.25
(31.75)
2
1
0.30
(7.6)
.040± .005
(1.01)
DIA.
SIDE
See Note 2
0.72
(18.3)
4
3
0.70
(17.8)
0.40 0.40 0.60
(10.2) (10.2) (15.2)
0.75
(19.0)
P
IN
O
UT
C
HART
Single
Pin
Dual
Remote On/Off Remote On/Off
1
+ Vin
2
+ Vin
- Vin
3
- Vin
Sync
4
Sync
5 +Sense/Trim(Down)*
+ Vout
Output Trim
6
Common
- Sense/Trim(Up)*
7
- Vout
+ Vout*
8
Output Trim
- Vout*
9
No Pin
No Pin
10
No Pin
Triple
Remote On/Off
+ Vin
- Vin
Sync
+ Vout (Aux)
Common(Aux)
- Vout (Aux)
+5V Vout
- 5V Vout
Output Trim
* Connections for single output models without sensing or external trimming:
For proper operation, externally connect Pin 5 (+Sense) to Pin 8 (+Vout)
and Pin 7 (-Sense) to Pin 9 (-Vout)
Notes:
1. Unless otherwise specified dimensions are in inches (mm).
Tolerances
Inches
mm
X.XX = ±0.02
X.X = ±0.5
X.XXX= ±0.010
X.XX = ±0.25
2. Mounting inserts: 4-40 X .10 (2.5) Deep
All specifications are typical at nominal input, nominal load and 25
°
C unless otherwise specified.
External, low ESR, 10 microfarad (minimum) capacitor across input is recommended for operation.
B-121
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