300WFS series
Single & Dual Output
DC/DC Converter
NEW
Approved for New Designs
www.martekpower.com
F
EATURES
•
•
•
•
•
•
•
SMT Package
Up to 83% Efficiency
Single & Dual Output, 3 watt converter
2 - 1 Input Range
1500 VDC Input / Output Isolation
Short Circuit Protection
MTBF > 1,000,000 Hours
D
ESCRIPTIONS
The 300WFS series 3 watts power modules are high
efficiency, surface mount dc-dc converters that operate over a
wide input voltage range of 9 - 18 VDC, 18 - 36 VDC and 36 - 75
VDC and provide precisely regulated output voltages of 3.3V,
5V, 12V, 15V, ±5V, ±12V and ±15V.
The -40
o
C to +71
o
C operating temperature range makes it
ideal for data communication equipment, mobile battery
driven equipment, distributed power systems, telecommunication
equipment, mixed analog/digital subsystems, process/
machine control equipment, computer peripheral systems
and industrial robot systems.
I
NPUT
C
HARACTERISTICS
Min Typ Max Unit/Comments
Start Voltage
12 VDC Input Models
9
24 VDC Input Models
18
48 VDC Input Models
36
Input Fuse Requirements
12 VDC Input Models
24 VDC Input Models
48 VDC Input Models
Reverse Polarity Input Current
Short Circuit Input Power
Input Filter
12
24
48
750
350
200
18
36
72
VDC
VDC
VDC
mA; Slow blow type
mA; Slow blow type
mA; Slow blow type
A
0.5
mW
1500
Pi Filter
O
UTPUT
C
HARACTERISTICS
Min Typ Max Unit/Comments
±0.5 ±1.0 % Output voltage at
Output Voltage Set Point
nominal line & FL
±0.5 ±2.0 % Equal Output
Output Voltage Balance
(Duals)
Loads
±0.1 ±0.3 % Output voltage
Line Regulation
measured from
min. input line to
maximum
±0.3 ±1.0 % Output voltage
Load Regulation
measured from FL
to 10% load
50 75 mV p-p, Nom.Line
Ripple/Noise
@FL, 20MHz B.W.,
using 1
μf
bypass
capacitor
100 mV p-p, Over Line,
Ripple/Noise
Load & Temp., 20
MHz B.W.,
using 1
μf
bypass
capacitor
Short Circuit Protection
Continuous,
Automatic Recovery
±2 ±6 % deviation of Vout
Transient Response Deviation
for a 25% load change
120
Over Power Protection
%
200 500
μS
for 25% load
Transient Recovery Time
change
±0.01 ±0.02 % per degree C
Temperature Coefficient
G
ENERAL
C
HARACTERISTICS
Switching Frequency
Isolation Voltage
Isolation Resistance
Isolation Capacitance
MTBF (MIL-HBK-217F)
Min Typ Max Unit/Comments
kHz
300
VDC, 1 minute
1500
Mohm, 500VDC
1000
65 100 pF, 100kHz, 1Volt
Million Hours,
1
+25
o
C, Ground
Benign
Martek Power reserves the right to change specifications without notice.
B-37
E
NVIRONMENTAL
S
PECIFICATIONS
Operating Temp. Range
Operating Temp. Range
Storage Temp. Range
Relative Humidity
Cooling
Min
-40
-40
-40
Typ Max
+71
+90
+125
95
Unit/Comments
o
C; Ambient
o
C; Case
o
C
% Humidity; non-
condensing
Free-Air Convection
P
HYSICAL
C
HARACTERISTICS
Case Size
Case Material
Flammability
Weight
Unit/Comments
1.27 X 0.74 X 0.4 inches
(32.3 X 18.8X 10.2 mm)
Non-conductive Black Plastic
UL94V-0
8.8 Grams max.
O
UTLINE
D
RAWING
0.702 (17.82)
24 23 22
15 14 13
TOP VIEW
1 2 3
0.100 (2.54)
1.27 (32.3)
10 11 12
0.020 (0.5)
0.40 (10.2)
0.20 (0.5)
SIDE VIEW
0.09 (2.2)
0.58(14.8)
0.63 (16.1)
0.74 (18.8)
0.15
P
IN
O
UT
C
HART
Pins
1
2
3
10
11
12
13
14
15
22
23
24
Single
- Vin
- Vin
NC
NC
NC
NC
+ Vout
NC
- Vout
NC
+ Vin
+ Vin
Dual
- Vin
- Vin
NC
Common
NC
- Vout
+ Vout
NC
Common
NC
+ Vin
+ Vin
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
Pin :
±0.002
±0.05
NC = No Connection
All specifications are typical at nominal input, nominal load and 25
°
C unless otherwise specified.
External, low ESR, 10 microfarad (minimum) capacitor across output is recommended for operation.
B-38
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