53278 Datasheet, PDF (1/7 Pages) Micropac Industries – 28 V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER

53278
28 V HIGH SIDE LATCHING SOLID-STATE
POWER CONTROLLER
Mii
MICROPAC
MICROCIRCUITS PRODUCTS
DIVISION
Features:
• Switch Status Output
• I²T circuit protection
• SPST, normally open
• 1A , 2A Pin Configurable Operating Current
• Power FET output with Low on-state resistance
• Full military temperature operation:
-55ºC to +125ºC.
• Radiation hardened capable.
• Military environmental screening available
Applications:
• Ideal for 24V bus applications
• Aircraft Power Distribution
• Military/High Reliability Systems
• Satellite/Space Systems
DESCRIPTION
The 53278 is a military SPST, solid-state relay. It is a lightweight device resistant to damage from shock and vibration, and
immune to contact-related problems (contamination, arcing) associated with mechanical equivalents.
Transformer coupling between the input and output stages provides effective isolation up to 1000 V RMS. The Power FET
output eliminates bipolar offset and minimizes output voltage drop.
The preferred control input is CMOS compatible operating from a bias supply of 4.5 to 5.5VDC. (See Figure 1)
Integral short-circuit protection, I²T trip and status output is provided. This unit is Pin configurable for 1A or 2A output. The
output current flow is sensed while under load or while switching, and responds to an over-current with an I²T trip curve by
opening the output. An open-collector Status is available to indicate the switch state. The output will remain blocked
indefinitely until the short is removed and the unit reset. This feature prevents damage to the controller and also averts
further system failures that may be caused by the short circuit. Output Status is On (High) when the output is switched on
and is Off (Low) whenever the output is commanded off or tripped. Resetting the unit is accomplished by recycling the input
control.
This device is available in a variety of quality levels from COTS to class K including any custom screening requirements and
all components have radiation-hardened equivalents. The basic data sheet part is environmentally screened to H level in
accordance with Table C-IX of MIL-PRF-38534 with no element evaluation or QCI.
ABSOLUTE MAXIMUM RATINGS
Isolation voltage¹.......................................................................................................................................................1000 V RMS
Continuous operating output voltage² ..............................................................................................................................50 VDC
Transient output voltage……………………………………………………………………………………………………. ....60 VDC
Load Current ....................................................................................................................................................18A / Self Limiting
Bias supply voltage, V_DD ...................................................................................................................................... 4.5 to 5.5 VDC
Operating temperature ............................................................................................................................ -55ºC to +125ºC Case
Storage temperature ..........................................................................................................................................-55ºC to +125ºC
Notes:
1 _{60 Hz sine wave}
2 _{Reversing polarity on the output may cause permanent damage}
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION • 905 E. Walnut St., Garland, TX 75040 • [phone] • Fax [phone]
www.micropac.com E-MAIL: [e-mail] 2/24/04 Rev. D
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