MWS DC-DC Series Data Sheet
Single-Output, 20 Watts
Features
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Description
MWS dc-dc converters provide up to 20 watts of output power in an industry-standard package and footprint. The
MWS is available in either 24V or 48V input versions. With a maximum case temperature of 100°C, the MWS is
well suited for the most demanding telecom, networking, and industrial applications. The MWS features 1500 VDC
isolation, short circuit, and overtemperature protection.
Efficiency vs. Load (24V Input)
20W standard package
100°C case operation
3.3V output available
Integrated heat sink
Enable and trim pins
Wide range input voltage
1500V isolation
Short circuit protection
Technical Specifications
Input
Voltage Range
24 VDC Nominal
48 VDC Nominal
Input Undervoltage Lockout
UVLO Hysteresis
Reflected Ripple
Input Reverse Voltage Protection
Output
85
80
18 - 36 VDC
33 - 75 VDC
<33V or <18V
1V Nominal
50 mA
Shunt Diode
EFFICIENCY %
75
MWS020YGY
70
EFF. (18v)
EFF. (24v)
65
EFF. (36v)
60
Setpoint Accuracy
Line regulation V
in
Min. - V
in
Max., I
out
Rated
Load Regulation I
out
Min. - I
out
Max., V
in
Nom.
Minimum Output Current
Dynamic Regulation, Loadstep
Pk Deviation
Settling Time
Voltage Trim Range
Short Circuit / Overcurrent Protection
Current Limit Threshold Range, % of I
out
Rated
General
Turn-On Time, Max.
Remote Shutdown
Switching Frequency
Isolation
Input - Output
Temperature Coefficient
Case Temperature
Operating Range
Storage Range
Humidity Max., Non-Condensing
Vibration, 3 Axes, 5 Min Each
MTBF† (Bellcore TR-NWT-000332)
Safety
Weight (approx.)
±1.0%
0.2% V
out
0.5% V
out
5%
25% I
out
4% V
out
500 µs
±10%
Shutdown / Hiccup
110 - 140%
90
85
EFFICIENCY %
10
20
30
40
50
60
70
80
90
100
LOAD %
Efficiency vs. Load (48V Input)
80
75
70
65
60
55
50
10
20
30
40
50
60
70
80
90
100
LOAD %
MWS020ZGY
EFF. (33v)
EFF. (48v)
EFF. (75v)
175 ms Max.
Positive Logic
450 kHz
1500 VDC
0.015%/°C
-40 To +100°C
-40 To +105°C
95%
5 g, 10 - 55 Hz
1.9 x 106 hrs
UL, cUL, TUV
1.2 oz
Notes
† MTBF predictions may vary slightly from model to model.
Specifications typically at 25°C, normal line, and full load, unless
otherwise stated.
Soldering Conditions: I/O pins, 260°C, ten seconds; fully compatible
with commercial wave-soldering equipment.
REV. JUN 04, 2004
Page 1 of 2
MWS DC-DC Series Data Sheet
Single-Output, 20 Watts
Model Selection
MODEL
INPUT VOLTAGE
(VOLTS)
INPUT VOLTAGE
RANGE (VOLTS)
MAXIMUM INPUT
CURRENT (AMPS)*
OUTPUT
VOLTAGE (VOLTS)
RATED OUTPUT
CURRENT (AMPS)
RIPPLE & NOISE
pk-pk (mV)
TYPICAL
EFFICIENCY**
MWS020ZGY
MWS020ZHY
MWS020YJY
NOTES:
48
48
24
33 - 75
33 - 75
18 - 36
0.77
0.73
1.34
5
12
15
4
1.66
1.33
75
120
150
81%
85%
85%
* Maximum input current at minimum input voltage, maximum rated output power.
** At nominal Vin, rated output.
Model numbers highlighted in yellow or shaded are not recommended for new designs.
Mechanical Drawing
2.00"
(50.8mm)
5
1.100"(27.9mm)
6
0.600"(15.2mm)
0.400"(10.2mm)
0.200"(5.1mm)
0.700"(17.8mm)
1.60"
(40.6mm)
1
2
BOTTOM VIEW
7
0.300"(7.6mm)
3
4
8
-0.100"(-2.5mm)
0
-.30"(-7.6mm)
0
1.800"
(45.7mm)
-0.10"
(-2.5mm)
DIA 0.040"
(1.0mm)
0.18" MIN.
(4.6mm)
0.46"
(11.7mm)
Thermal Impedance
Natural Convection
100 LFM
200 LFM
300 LFM
400 LFM
11.5
°
C/W
10.2
°
C/W
8.5
°
C/W
6.5
°
C/W
5.4
°
C/W
Pin
1
2
3
4
5
6
7
8
Function
+ V
in
- V
in
No Pin
Shutdown
No Pin
+ V
out
- V
out
Trim
Tolerances
Inches:
.XX ± 0.020
.XXX ± 0.010
Pin:
± 0.002
Case:
+ 0.04, - 0.00
(Millimeters)
.X ± 0.5
.XX ± 0.25
Note:
Thermal impedance data is dependent on many
environmental factors. The exact thermal perfor-
mance should be validated for specific application.
± 0.05
+ 1.0, - 0.00
(Dimensions as listed unless otherwise
specified.)
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not authorized for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective divisional president of
Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
REV. JUN 04, 2004
Page 2 of 2
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