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PDF 53248-102 Data sheet ( Hoja de datos )
| Número de pieza | 53248-102 | |
| Descripción | 28 VDC SOLID STATE POWER CONTROLLER | |
| Fabricantes | Micropac Industries | |
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PRELIMINARY DATA SHEET
53248-102
28 VDC SOLID STATE
POWER CONTROLLER
Mii
HYBRID MICROELECTRONICS
PRODUCTS DIVISION
Features:
• Isolated Control
• Isolated Status Output
• Latched Fault Protection
Thermal Shutdown
Undervoltage & Overvoltage Shutdown
Current Limit
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 53248-102 is a 28 VDC Solid State High Side Power Controller (SSPC) that is designed to replace
electromagnetic circuit breakers rated at up to 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 and latch
for any of the above conditions until reset by recycling of the control input.
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 (15 seconds) ................................................................................................................................. +300°C
Junction Temperature .................................................................................................................................................. +150°C
Blocking Voltage ……………………………………………………………………………………………………… 63 VDC
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
53248-102
28VDC SOLID STATE 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/or 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 of the cable 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 = Maximum Trip Temperature
Ta = Ambient Temperature
On-state Resistance
R θja = Thermal Resistance, Junction to Ambient
RON (Tj max) = On-state resistance at Trip Temperature
Ron (T) = R25 x e 0.006 (T – 25)
R25 = on-state resistance at 25°C
e = 2.718282 (natural logarithm)
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 to less than the max voltage blocking of the SSPC (i.e. 63V). External protection is
recommended, either across the switch or across the load, to limit voltage transients to levels less than 63V to insure
the SSPC maximum blocking voltage is not exceeded.
Isolation of Control and Status
The SSPC was designed to utilize optical isolation both on the input/control and the status feed back. The only input
power required is that necessary to drive a control LED and provide pull up power for the open collector status
transistor. The SSPC derives its energy for operation from the 28 VDC load supply. As a result, the power in and
power out are completely isolated.
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 6 Páginas | |
| PDF Descargar | [ Datasheet 53248-102.PDF ] | |
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