ASD75-48S12Q-N - Astrodyne Corporation

75 Watt ASD-Q Single Series DC/DC Converters

Features

Small size 1.45”x2.28”x0.52”,

industry standard 1/4 brick

Excellent thermal performance with metal baseplate

Fast over voltage protection

Pulse-by-pulse current limiting, dead short

current limiting

Over-temperature protection

Auto-softstart

Very Low noise

Low magnetics run cooler

Constant frequency for normal operation

Wide input voltage range

Remote Sense with high regulation

Remote ON/OFF

Super energy saving, 6 mA input idle current

Output trim with very low temperature

Water Washable, wide humidity applications

Good shock and vibration damping

Description

The 75 Watt single ASD-Q series of 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 ASD-Q

Series utilizes an insulated metal substrate design in an industry

Standard features include remote sensing, output trim, and

remote Threaded-through holes are provided to allow

easy mounting or add a heat sink for extended temperature

use.

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ASD75-24S12Q

ASD75-24S15Q

ASD75-24S24Q

ASD75-48S3.3Q

ASD75-48S5Q

ASD75-48S12Q

ASD75-48S15Q

ASD75-48S24Q

375 Forbes Blvd. Mansfield, MA 02048 Ph: 800-823-8082 Fax: 508-339-0375 www.astrodyne.com Email: sales@astrodyne.com

standard 1/4 brick case size to meet the most rigorous require-

ments of COTS and thermally challenging industrial applications.

Unless otherwise stated, these apply for ambient temperature TA=23 ±2°C, nominal input voltage, and rated full load. (1)

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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).

ASD75-24S5Q ASD75-24S12Q ASD75-24S15Q ASD75-24S24Q

ASD75-48S3.3Q ASD75-48S5Q ASD75-48S12Q ASD75-48S15Q ASD75-48S24Q

75 Watt ASD-Q Single Series DC/DC Converters

375 Forbes Blvd. Mansfield, MA 02048 Ph: 800-823-8082 Fax: 508-339-0375 www.astrodyne.com Email: sales@astrodyne.com

Unless otherwise stated, these apply for ambient temperature TA=23 ±2°C, nominal input voltage, and rated full load. (1)

NOTES:

(1) Refer to the Astrodyne Application Notes for

terms, measurement circuits, and other information.

(2) Refer to the Astrodyne Application Notes for information on fusing.

For inrush current, refer to the above.

(3) 33 µF capacitor connected to two “Input” pins. Then place

current sensor in series with 12 µH inductor between 33 µF and

the source. The ripple current is measured over 5 Hz

to 20 MHz bandwidth (current sensor is located between the

converter input pin and the 12 µH inductor).

(4) Optimum performance is obtained when this power supply is

operated within the minimum to maximum load

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

(5) Load regulation is as the output voltage change when

changing load current from maximum to minimum. The voltage

is measured at the output pin.

(6) Load Transient Recovery Time is as the time for the

output to settle from a 50 to 75% or 25% step load change to a

1% error band of output voltage (rise time of step = 2µ Sec).

(7) Load Transient Overshoot is as the peak overshoot

during a transient as in the Note 6 above.

(8) Noise is measured per the Astrodyne Application Notes. Output

noise is measured with a 10 µF tantalum capacitor in parallel

with a 0.1 µF ceramic capacitor connected across the output to

CMN. Measurement bandwidth is 0-20 MHz.

(9) When an external switch is used, such as open collector

switch, logic high requires the switch to be high-impedance.

Switch leakage currents greater than 20 µA may be to

trigger the to the logic-low state.

(10) Most switches would be suitable for logic control, in case

there is a problem, you can make following estimation and then

leave some margin.

When open collector is used for logic high, “Open Circuit Voltage

at 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/

Pin”, “Output Resistance” and “LOW Logic Level” are used

to estimate the low impedance requirement of switch.

(11) Thermal impedance is tested with the converter mounted vertically

and facing another printed circuit board 1/2 inch away. If

converter is mounted horizontally with no obstructions, thermal

impedance is approximately 10 °C/W.

If heat sink is needed, apply a very thin layer of thermally

conductive grease on the metal base of converter, then properly

tighten the screws.

(12) Water Washability - These DC/DC converters are designed to

withstand most solder/wash processes. Careful attention should

be used when assessing the applicability in your c

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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ASD75-24S3.3Q ASD75-24S5Q ASD75-24S12Q ASD75-24S15Q ASD75-24S24Q

ASD75-48S3.3Q ASD75-48S5Q ASD75-48S12Q ASD75-48S15Q ASD75-48S24Q

75 Watt ASD-Q Single Series DC/DC Converters

375 Forbes Blvd. Mansfield, MA 02048 Ph: 800-823-8082 Fax: 508-339-0375 www.astrodyne.com Email: sales@astrodyne.com

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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).

Mechanical tolerances unless otherwise noted:

X.XX dimensions: ±0.020 inches

X.XXX dimensions: ±0.005 inches

75 Watt ASD-Q Single Series DC/DC Converters

375 Forbes Blvd. Mansfield, MA 02048 Ph: 800-823-8082 Fax: 508-339-0375 www.astrodyne.com Email: sales@astrodyne.com