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53248 Schematic ( PDF Datasheet ) - Micropac Industries

Teilenummer 53248
Beschreibung 28 VDC SOLID STATE POWER CONTROLLER
Hersteller Micropac Industries
Logo Micropac Industries Logo 




Gesamt 7 Seiten
53248 Datasheet, Funktion
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
www.micropac.com E-MAIL: [email protected] 05/16/01






53248 Datasheet, Funktion
PRELIMINARY DATA SHEET
53248
28 VDC SOLID STATE HIGH SIDE SELF-PROTECTED POWER CONTROLLER
Truth Table
Control
Output
Normal Operation
LL
HH
Current Limitation
LL
HH
Short circuit to Power Ground L L
HL
Over-Temperature
LL
HL
Short circuit to Power In
LH
HH
Undervoltage
LL
HL
Overvoltage
LL
HL
Note: L = “Low” Level
H = “High” Level
** Status output will cycle between H and L while SSPC is in auto-reset mode.
Status
H
L
H
**
H
**
H
**
L
L
H
H
H
H
Loads
The 53248 SSPC is designed to handle low side loads from +5 VDC to +33 VDC. Any combination of inductive,
resistive and capacitive may be used. This includes lamps and DC motors.
Inductive loads require protecting the SSPC from voltage transients as pointed out in the precaution section above.
Charging Capacitive loads is generally not a problem due to the auto-reset feature of the current limit function. For
capacitive loads, the user must assure that junction temperatures are not exceeded and at turn off if the VCC drops
below the voltage charge on the capacitor, any current will flow through the body diode of the FET switch. Since this
is a normal PN junction, the power dissipated for a given current can be many times that of the forward current
through the FET.
Incandescent lamps must be treated much like capacitive loads in that in-rush currents at turn-on can cause an
overcurrent condition.
DC motors must be treated like capacitive loads because in-rush currents can be very high. Should a machine
continue to rotate after power is removed, reverse currents due to back EMF need to be addressed.
Heatsinking
The SSPC is designed to take advantage of the relationship between junction temperatures and heat sink thermal
impedance. As described in the section discussing current trip characteristics, the thermal impedance of the heat sink
utilized can determine the magnitude of over current or short circuit current expected in a system.
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
www.micropac.com E-MAIL: [email protected] 05/16/01

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