Approved for New Designs
300WFS series
www.martekpower.com
FEATURES
Single & Dual Output
DC/DC Converter
• 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
INPUT CHARACTERISTICS
DESCRIPTIONS
Unit/Comments
Min Typ Max
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.
Start Voltage
12 VDC Input Models
24 VDC Input Models
48 VDC Input Models
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
VDC
VDC
VDC
9
12 18
18 24 3±
3± 48 72
o
o
The -40 C to +71 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.
mA; Slow blow type
mA;Slow blow type
mA;Slow blow type
A
750
350
200
0.5
mW
Pi Filter
1500
OUTPUT CHARACTERISTICS
Min Typ Max
Unit/Comments
% Output voltage at
nominal line & FL
% Equal Output
Loads
% Output voltage
measured from
min. input line to
maximum
±0.5 ±1.0
Output Voltage Set Point
±0.5 ±2.0
±0.1 ±0.3
Output Voltage Balance
(Duals)
Line Regulation
±0.3 ±1.0
50 75
Load Regulation
Ripple/Noise
% Output voltage
measured from FL
to 10% load
mV p-p, Nom.Line
@FL, 20MHz B.W.,
using 1 μf bypass
capacitor
mV p-p, Over Line,
Load & Temp., 20
MHz B.W.,
GENERAL CHARACTERISTICS
Min Typ Max Unit/Comments
Switching Frequency
Isolation Voltage
Isolation Resistance
Isolation Capacitance
MTBF (MIL-HBK-217F)
300
kHz
1500
1000
VDC, 1 minute
Mohm, 500VDC
±5 100 pF, 100kHz, 1Volt
Million Hours,
100
Ripple/Noise
1
o
+25 C, Ground
Benign
using 1 μf bypass
capacitor
Continuous,
Short Circuit Protection
Automatic Recovery
% deviation of Vout
for a 25% load change
%
μS for 25% load
change
% per degree C
±2 ±±
Transient Response Deviation
120
Over Power Protection
Transient Recovery Time
200 500
±0.01 ±0.02
Temperature Coefficient
Martek Power reserves the right to change specifications without notice.
B-37