A
75 Watt HE Single Series DC/DC Converters
2401 Stanwell Drive Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
1
3/30/2004, eco#: 041007-1, 050210-3, 050606-1, 050503-1, 050713-2
Description
The 75 watt single HE series DC/DC converters provide
precisely regulated dc outputs. All outputs are fully isolated
from the inputs, allowing the output to be used with positive or
negative polarity and various grounding options. The HE
series meets the most rigorous requirements in an industry
standard case size for industrial process control and telecom
applications.
Standard features include remote sensing, output trim, and
remote on/off. Threaded-through holes are provided to allow
easy mounting or to add a heat sink for extended temperature
use.
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Features
Small Size 2.4" x 2.28" x 0.55"
Industry Standard Pinout
Excellent Thermal Performance
with Metal Baseplate
High Efficiency
Volt-seconds Clamp and Fast
Over Voltage Clamp
Pulse-by-pulse Current Limiting, Short Circuit
Frequency Foldback, Dead Short Shutdown
Over-temperature Protection
Auto-softstart
Low Noise
Planar Magnetics
Constant Frequency for Normal Operation
More than 2:1 Input Voltage Range
Remote Sense
Remote ON/OFF
Super Energy Saving, 2 mA Input Idle Current
Output Trim with Very Low Temperature
Coefficient
Water Washable, Wide Humidity Applications
Shock & Vibration Damping
Low Cost
Undervoltage Lockout
Input Reverse Voltage Protection
5 Year Warranty
A
75 Watt HE Single Series DC/DC Converters
2401 Stanwell Drive Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
2
3/30/2004, eco#: 041007-1, 050210-3, 050606-1, 050503-1, 050713-2
Unless otherwise stated, these specifications apply for ambient temperature T
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=23 2C, nominal input voltage, and rated full load. (1)
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75 Watt HE Single Series DC/DC Converters
2401 Stanwell Drive Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
3
3/30/2004, eco#: 041007-1, 050210-3, 050606-1, 050503-1, 050713-2
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Mechanical tolerances unless otherwise noted:
X.XX dimensions: 0.020 inches
X.XXX dimensions: 0.005 inches
A
75 Watt HE Single Series DC/DC Converters
2401 Stanwell Drive Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
4
3/30/2004, eco#: 041007-1, 050210-3, 050606-1, 050503-1, 050713-2
NOTES:
(1)
Refer to the CALEX Application Notes for the definition of terms,
measurement circuits, and other information.
(2)
33 F capacitor connected to two "Input" pins. Then place
current sensor in series with 12 H inductor between 33 F and
source. The reflected ripple current is measured over 5 Hz to
20 MHz bandwidth.
(3)
Refer to the CALEX Application Notes for information on fusing.
(4)
Optimum performance is obtained when this power supply is
operated within the minimum to maximum load specifications.
No damage to module will occur, when the output is operated at
less than minimum load, but the output voltage may contain a
low frequency component that may exceed output noise
specifications.
(5)
Load regulation is defined as the output voltage change when
changing load current from maximum to minimum.
(6)
Load Transient Recovery Time is defined as the time for the
output to settle from a 50 to 75% step load change to a 1% error
band (rise time of step = 2Sec).
(7)
Load Transient Overshoot is defined as the peak overshoot
during a transient as defined in the Note 6 above.
(8)
Noise is measured per the CALEX Application Notes. Output
noise is measured with a 10F tantalum capacitor in parallel with
a 0.1 F ceramic capacitor connected across the output to CMN.
Measurement bandwidth is 0-20 MHz.
(9)
When an external On/Off switch is used, such as open collector
switch, logic high requires the switch to be high-impedance.
Switch leakage currents greater than 10 uA may be sufficient to
trigger the ON/Off to the logic-low state.
(10) Most switches would be suitable for logic On/Off control, in case
there is a problem, you can make following estimations and then
leave some margins.
When open collector is used for logic high, "Open Circuit Voltage
at On/Off Pin", "Output Resistance" and "External Leakage
Current Allowed for Logic High" are used to estimate the high
impedance requirement of open collector.
When switch is used for logic low, "Open Circuit Voltage at On/
Off Pin", "Output Resistance" and "LOW Logic Level" are used
to estimate the low impedance requirement of switch.
(11) Specifications subject to change without notice.
(12) Water Washability - Calex DC/DC converters are designed to
withstand most solder/wash processes. Careful attention should
be used when assessing the applicability in your specific
manufacturing process. Converters are not hermetically sealed.
(13) Torque fasteners into threaded mounting inserts at 12 in. oz. or
less. Greater torque may result in damage to unit and void the
warranty.
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* Absolute Maximum Ratings. Caution: Stresses in excess of the Absolute
Maximum Ratings can cause permanent damage to the device (see Note 1).
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