1
MWS020ZGY
50
55
60
65
70
75
80
85
90
10 20 30 40 50 60 70 80 90 100
LOAD %
EFFICIENCY %
EFF. (33v)
EFF. (48v)
EFF. (75v)
MWS020YGY
60
65
70
75
80
85
10 20 30 40 50 60 70 80 90 100
LOAD %
EFFICIENCY %
EFF. (18v)
EFF. (24v)
EFF. (36v)
TECHNICAL SPECIFICATIONS
• 20W Standard Package
• 100°C Case Operation
• 3.3V Output Available
• Integrated Heatsink
• Enable and Trim Pins
• Wide Range Input
Voltage
• 1500V Isolation
• Short Circuit Protection
DESCRIPTION FEATURES
Efficiency vs. Load (48V Input)
Efficiency vs. Load (24V Input)
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.
Turn-On Time, Max. 175 ms Max.
Remote Shutdown Positive Logic
Switching Frequency 450 kHz
Isolation
Input - Output 1500 VDC
Temperature Coefficient 0.015%/°C
Case Temperature
Operating Range -40 To +100°C
Storage Range -40 To +105°C
Humidity Max., Non-Condensing 95%
Vibration, 3 Axes, 5 Min Each 5 g, 10 - 55 Hz
MTBF†(Bellcore TR-NWT-000332) 1.9 x 106hrs
Safety UL, cUL, TUV
Weight (approx.) 1.2 oz
General
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.
Voltage Range
24 VDC Nominal 18 - 36 VDC
48 VDC Nominal 33 - 75 VDC
Input Undervoltage Lockout <33V or <18V
UVLO Hysteresis 1V Nominal
Reflected Ripple 50 mA
Input Reverse Voltage Protection Shunt Diode
Input
Setpoint Accuracy ±1.0%
Line regulation Vin Min. - Vin Max., Iout Rated 0.2% Vout
Load Regulation Iout Min. - Iout Max., Vin Nom. 0.5% Vout
Minimum Output Current 5 %
Dynamic Regulation, Loadstep 25% Iout
Pk Deviation 4% Vout
Settling Time 500 µ
s
Voltage Trim Range ±10%
Short Circuit / Overcurrent Protection Shutdown / Hiccup
Current Limit Threshold Range, % of Iout Rated 110 - 140%
Output
MWS SERIES - 20 WATT
REV. 09/01
2
MODEL INPUT VOLTAGE INPUT VOLTAGE MAXIMUM INPUT OUTPUT RATED OUTPUT RIPPLE & NOISE TYPICAL
(VOLTS) RANGE (VOLTS) CURRENT (AMPS)* VOLTAGE (VOLTS) CURRENT (AMPS) pk-pk (mV) EFFICIENCY**
MWS020ZGY 48 33 - 75 0.77
54
75 81%
MWS020ZHY 48 33 - 75 0.73
12 1.66
120 85%
MWS020YJY 24 18 - 36 1.34
15 1.33
150 85%
NOTES: * Maximum input current at minimum input voltage, maximum rated output power.
** At nominal Vin, rated output.
MECHANICAL DRAWING
Thermal Impedance Tolerances
Pin Function
1+ V
in
2- V
in
3 No Pin
4 Shutdown
5 No Pin
6+ V
out
7- V
out
8 Trim
Inches: (Millimeters)
.XX ± 0.020 .X ± 0.5
.XXX ± 0.010 .XX ± 0.25
Pin:
± 0.002 ± 0.05
Case:
+ 0.04, - 0.00 + 1.0, - 0.00
(Dimensions as listed unless otherwise
specified.)
Note:
Thermal impedance data is dependent on many
environmental factors. The exact thermal perfor-
mance should be validated for specific application.
Natural Convection 11.5 °C/W
100 LFM 10.2 °C/W
200 LFM 8.5 °C/W
300 LFM 6.5 °C/W
400 LFM 5.4 °C/W
MODELS - (See the last page of Section for options.)
MWS SERIES - 20 WATT
3
OPTION SUFFIX APPLICABLE SERIES REMARKS
Negative Logic N HAS, HBD, HBS, HES, HLS, HLD, LES, TTL "Low" Turns Module ON
QBS, QES, QLS, TES, TQD TTL "High" Turns Module OFF
Lucent-Compatible Trim T HAS, HBD, HBS, HES, HLS, QBS, QES,
QLS
Terminal Strip TS XWS, XWD, XWT
Trim 1 IAS, LES
Enable 2 IAD, IAS, LES, SMS
Trim and Enable 3 IAS, LES
Pin Length and Heatsink Options Standard Pin Length is 0.180" (4.6mm)
0.110" (2.8mm) Pin Length 8 All Leaded Models
0.150" (3.8mm) Pin Length 9 All Leaded Models
0.24" (6.1mm) Horizontal Heatsink 1H All 1/4-Bricks, 1/2-Bricks, 3/4-Bricks, Full-Bricks Includes Thermal Pad
(Except HLS, HLD, QLS, TLD, and TKD Packages)
0.24" (6.1mm) Vertical Heatsink 1V All 1/4-Bricks, 1/2-Bricks, 3/4-Bricks, Full-Bricks Includes Thermal Pad
(Except HLS, HLD, QLS, TLD, and TKD Packages)
0.45" (11.4mm) Horizontal Heatsink 2H All 1/4-Bricks, 1/2-Bricks, 3/4-Bricks, Full-Bricks Includes Thermal Pad
(Except HLS, HLD, QLS, TLD, and TKD Packages)
0.45" (11.4mm) Vertical Heatsink 2V All 1/4-Bricks, 1/2-Bricks, 3/4-Bricks, Full-Bricks Includes Thermal Pad
(Except HLS, HLD, QLS, TLD, and TKD Packages)
0.95" (24.1mm) Horizontal Heatsink 3H All 1/4-Bricks, 1/2-Bricks, 3/4-Bricks, Full-Bricks Includes Thermal Pad
(Except HLS, HLD, QLS, TLD, and TKD Packages)
0.95" (24.1mm) Vertical Heatsink 3V All 1/4-Bricks, 1/2-Bricks, 3/4-Bricks, Full-Bricks Includes Thermal Pad
(Except HLS, HLD, QLS, TLD, and TKD Packages)
When ordering equipment options, use the following suffix information. Select the option(s) that you prefer
and add them to the model number. Example ordering options are located below the options table.
Example Options:
HBS050ZG-ANT3V = HBS050ZG-A with negative logic, Lucent-compatible trim, and 0.95” vertical heatsink.
LES015YJ-3N = LES015YJ with optional trim and enable, negative logic.
QBS066ZG-AT8 = QBS066ZG-A with Lucent-compatible trim and 0.110” pin length.
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.
OPTIONS
REV. AUG 16, 2002
