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PDF 53248 Data sheet ( Hoja de datos )
| Número de pieza | 53248 | |
| Descripción | 28 VDC SOLID STATE POWER CONTROLLER | |
| Fabricantes | Micropac Industries | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 53248 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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PRELIMINARY DATA SHEET
53248
28 VDC SOLID STATE POWER CONTROLLER
Mii
HYBRID MICROELECTRONICS
PRODUCTS DIVISION
Features:
• Isolated Controls
• Isolated Status Outputs
• Fault Protection
Thermal Shutdown
Undervoltage & Overvoltage Shutdown
Current Limitation
Short Circuit Protection
Applications:
• Power Distribution In Land/Air/Launch Vehicles
• Motor Switch
• Displays/Lamps/Controls
• Industrial Automation
• Switching Heaters
• Test Equipment
• Machine Control Equipment
• Medical Lab Equipment
DESCRIPTION
The 53248 is a 28 VDC Solid State High Side Power Controller (SSPC) that is designed to replace electromagnetic
circuit breakers rated at 10 amperes. It is a high side switch utilizing N-channel vertical power FET technology with
integral charge pump. The SSPC provides a status output that signals a variety of conditions including over
temperature shutdown, overvoltage or undervoltage, over-current or short circuit. It will trip off for any of the above
conditions and automatically (based on an internal thermal time constant) cycle On/Off until the fault or the control
signal is removed.
Using vertical MOSFET technology, the SSPC offers extremely low “ON” resistance. This results in very low power
dissipation, which allows operation over the temperature range of –40°C to +85°C with minimal heat sinking.
ABSOLUTE MAXIMUM RATINGS
(@ TC = 25°C unless otherwise specified)
Input Control Current......................................................................................................................................................10 mA
Reverse Input Voltage (Control to Signal Ground)..................................................................................................... - 5 VDC
Pins to Case Isolation.............................................................................................................................................. 1000 VDC
Input-Output Isolation .............................................................................................................................................. 1000 VDC
Lead Temperature........................................................................................................................................................ +300°C
Junction Temperature .................................................................................................................................................. +150°C
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. HYBRID MICROELECTRONICS PRODUCTS DIVISION • 905 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 494-2281
1 page  
PRELIMINARY DATA SHEET
53248
28 VDC SOLID STATE HIGH SIDE SELF-PROTECTED POWER CONTROLLER
APPLICATION INFORMATION
The cable harness occupies an important position in the total network to be protected. The wide variety and in
some cases considerable length and packing density used makes them particularly susceptible to persistent
overloads and overheating. The maximum current carrying capacity of a cable depends on its resistance, type of
insulation material and the ambient temperature. A cable, including insulation, generally consists of at least two
materials with different thermal capacitance and thermal resistance. The maximum temperatures of most cables
are at least +150°C (depending on the insulation properties) which is very close to the maximum junction
temperature of the SSPC (Shutdown). Since under overcurrent or short circuit conditions, the unit resistance per
unit length for the cable is much less than the RDS of the SSPC, the unit heating will also be much less. Under
these conditions, it is apparent that the SSPC can adequately protect properly selected cabling.
The following formulas provide methods for calculating the primary parameters.
Trip Current
Itrip = {(Tj max – Ta)/[R θja ][RON (Tj max)]}1/2
Tj max
Ta
= Maximum Trip Temperature
= Ambient Temperature
R θja = Thermal Resistance, Junction to Ambient
RON (Tj max) = On-state resistance at Trip Temperature
On-state Resistance
RON(T) = {(Y2 – Y1)T2 + (300)(Y2 – Y1)T + (67500)Y1 – (8125)Y2} / 59375
Y1 = RON at +25°C
Y2 = RON at +150°C
T = Tj at temperature of interest in °C
With the above information, the temperature and current trip can be determined based upon the type of mounting
chosen and the ambient temperatures of operation.
Precaution
When a short circuit causes turn-off of the SSPC, precautions must be taken to limit transient voltages generated by
any inductance in the load. External protection is recommended, either across the switch or across the load, should
the application result in energies beyond this level.
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. HYBRID MICROELECTRONICS PRODUCTS DIVISION • 905 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 494-2281
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet 53248.PDF ] | |
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