500
WATT
MXW
SERIES
DC/DC CONVERTERS
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
ECO 161004-1, 170213-2, 170227-1, 170321-1,170412-2, 170802-1
Page 1 of 16
Description
The 4:1 Input Voltage 500 Watt Single MXW DC/DC
converter provides a precisely regulated dc output.
The output voltage is fully isolated from the input,
allowing the output to be positive or negative polarity
and with various ground connections. The 500 Watt
MXW meets the most rigorous performance standards
in an industry standard footprint for mobile (12V
IN
),
process control (24V
IN
), and military COTS (28V
IN
)
applications.
The 4:1 Input Voltage 500 Watt MXW includes trim and
remote ON/OFF. Threaded through holes are provided
to allow easy mounting or addition of a heatsink for
extended temperature operation.
The converters high efficiency and high power density
are accomplished through use of high-efficiency
synchronous rectification technology, advanced
electronic circuit, packaging and thermal design thus
resulting in a high reliability product. Converter
operates at a fixed frequency and follows conservative
component de-rating guidelines.
Product is designed and manufactured in the USA.
Features
• 4:1 Input voltage range
• High power density
• Small size 2.4” x 2.5” x 0.52”
• Efficiency up to 95.7%
• Excellent thermal performance with metal case
• Over-Current and Short Circuit Protection
• Over-Temperature protection
• Auto-restart
• Monotonic startup into pre-bias
• Constant frequency
• Remote ON/OFF
• Good shock and vibration damping
• Extended Temperature Range -55ºC to +105ºC
Available
• RoHS Compliant
• UL60950 Approved
Model
Input Range
VDC
Vout
VDC
Iout
ADC
Min Max
24S12.41MXW (ROHS) 9 36 12 41
24S24.21MXW (ROHS) 9 36 24 21
24S28.18MXW (ROHS) 9 36 28 18
1. Extended Temperature Range of -55ºC to +105ºC is
available. Add “-T” to the part number when ordering.
i.e. 24S12.41MXW-T (ROHS)
2. Negative Logic On/Off feature is available. Add “-N”
to the part number when ordering.
i.e. 24S12.41MXW-N (ROHS)
i.e. 24S12.41MXW-NT (ROHS)
3. Designed to meet MIL-STD-810G for functional shock
and vibration. The unit must be properly secured to the
interface medium (PCB/Chassis) by use of the threaded
inserts of the unit.
4. A thermal management device, such as a heatsink, is
required to ensure proper operation of this device. The
thermal management medium is required to maintain
baseplate < 105ºC for full rated power.
5. Non-standard output voltages are available. Please
contact the factory for additional information.
500
WATT
MXW
SERIES
DC/DC CONVERTERS
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
ECO 161004-1, 170213-2, 170227-1, 170321-1,170412-2, 170802-1
Page 2 of
16
Electrical Specifications:
Conditions: T
A
= 25ºC, airflow = 300 LFM (1.5m/s), V
IN
= 24VDC, unless otherwise specified. Specifications subject to change
without notice.
All Models
Parameter Notes Min Typ Max Units
Absolute Maximum Ratings
Input Voltage Continuous 0 40 V
Transient (100ms) 50 V
Operating Temperature Baseplate (100% load) -40 105 ºC
Baseplate (100% load) “-T” model -55 105 ºC
Storage Temperature -55 125 ºC
Isolation Characteristics and Safety
Isolation Voltage Input to Output 1500 V
Input to Baseplate & Output to Baseplate 1500 V
Isolation Capacitance 4500 pF
Isolation Resistance 10 20 MΩ
Insulation Safety Rating Basic
Designed to meet UL/cUL 60950, IEC/EN 60950-1
Feature Characteristics
Fixed Switching Frequency Output Voltage Ripple has twice this frequency 200 kHz
Output Voltage Trim Range ±10 %
Remote Sense Compensation This function is not provided N/A %
Output Overvoltage Protection Non-latching 117 124 130 %
Over Temperature Shutdown (Baseplate) Non-latching 110 120 ºC
Auto-Restart Period Applies to all protection features 450 500 550 ms
Turn-On Time from V
IN
Time from UVLO to
V
O
=90% V
OUT
(NOM) Resistive load
517 530 ms
Turn-On time from ON/OFF Control Trim from ON to
V
O
=90% V
OUT
(NOM) Resistive load
17 20 ms
Rise Time VOUT from 10% to 90% 4 7.5 11 ms
ON/OFF Control – Positive Logic
On State Pin open = ON or external voltage applied 2 12 V
Current Control Leakage current 0.16 mA
OFF State 0 0.8 V
Control Current Sinking 0.3 0.36 mA
ON/OFF Control – Negative Logic
ON State Pin shorted to –INPUT or 0.8 V
OFF State Pin open = OFF or 2 12 V
Thermal Characteristics
Thermal resistance Baseplate to Ambient Converter soldered to 3.95” x 2.5” x 0.07” 4
layer / 2oz copper FR4 PCB
5.2 ºC/W