53278 MICROPAC | Alldatasheet

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Technical content

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 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: microsales@micropac.com 2/24/04 Rev. D Pg. 1 of 7 53278 28 V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER Mii Features:

  • Switch Status Output
  • I 2T 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, I 2T 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 I 2T 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 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 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: microsales@micropac.com 2/24/04 Rev. D Pg. 2 of 7 53278 28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER

ELECTRICAL CHARACTERISTICS

TA = +25° C PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input characteristics CMOS configurations (Figure 1) Bias supply range, VDD 3.3 5.5 VDC Bias current 5 10 mA Input current 5 VDC Input 500 µA Control voltage range -0.5 5.5 VDC Turn-on voltage At V DD = 5.0V 2.8 3.2 VDC Turn-off voltage At V DD = 5.0V 0.5 2.0 VDC Dielectric strength 60 Hz 1000 V RMS Bus Return Bias Current: 28V Bus Voltage 10 20 mA Output characteristics Output current, sustaining: Steady state load 1.2 / 2.4 2.4 / 4.8 A Continuous blocking voltage 50 VDC On-state resistance, Rds (1A Configuration) 25ºC Case 0.075 0.1 Ohms On-state resistance, Rds (2A Configuration) 25ºC Case 0.050 0.075 Ohms Turn-on time @ 25ºC case Figure 2 0.8 2.0 mS Turn-off time @ 25ºC case Figure 2 0.5 1.0 mS Off-state leakage At Maximum Blocking Voltage 40 100 µA Output Capacitance 700 pF Load Start current 25ºC 6/12 7.5/15 9/18 A Short-circuit peak 100 A Trip Reset Time Remove short / overload & Cycle input 50 mS Status Output Specification Status Supply Voltage (open Collector) 5.0 32 VDC Status off leakage current VS = 30 VDC 100 µADC Status off leakage current VS = 15 VDC 4 µADC Status on voltage I STATUS = 5 MA 0.4 VDC High-To-Low Transition Time I STATUS = 5 MA 20 50 µS Junction temperature 150 ºC Thermal resistance, θJA θJC ºC/W ºC/W APPLICATION NOTES: 1. Maximum input switching frequency not to exceed 20 Hz under normal conditions, or 1 Hz if output is shorted. 2. Input transitions should be <1 ms and duration and input source should be “bounceless contact” type. 3. Inductive loads must be suppressed. 4. Peak current that may flow when output is shorted.

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 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: microsales@micropac.com 2/24/04 Rev. D Pg. 4 of 7 53278 28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER Note 1: A turn-off into a short produces an increase in current to the initial I 2T must trip value. Note 2: Shorted while On from any On operating condition can have a several µs surge current of as much as 100A. Note 3: Loss of and re-application of Bus power will result in a re-start (output open & Fault Status low.) Note 4: Output Status signal assumes a pull-up voltage is always present to produce a “1” when status is open. VDD CONTROL ON OFF ON OFF 3 A IOUT OUTPUT STATUS OFF ON (OPEN) SIMULATED SHORT Figure 3 - TIMING DIAGRAM

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 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: microsales@micropac.com 2/24/04 Rev. D Pg. 5 of 7 53278 28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER Truth Table – Power Sequencing Bus Voltage 0 On 0 On On VDD 0 0 On Control X X X 0 X X I Out Open Open Open Open 0 1 Output Status Open “1” Open “1” 0 0 Open “1” Short X X X Off Off Off Off (Note 1) (Note 1,2) (Note 3) (Note 3,4) (Note 5) (Note 5) Truth Table – Short circuit and Status Turn on into Short Sequence Short while on Sequence Control 0 1 1 0 1 1 1 1 0 1 I out Off Off Off Off On On Off Off Off On Output Status 0 0 0 0 Open “1” Open “1” 0 0 0 Open “1” Shorted Output Shorted Shorted X Off Off Off On X X Off Note 1: Unit Powers up in the Off condition with application of either Bus power or V DD. Note 2: Fault Status reports only when VDD is present. Note 3: Control “0” Off must be invoked upon simultaneous applications of 5V and Bus Power for an unambiguous output and fault status. Note 4: An Off Control to On Control transition is required to first turn the Unit On. Note 5: Loss of V DD will not change output state during normal operation. Note 6: Truth Table-Power sequencing: Output Status open collector pull-up resistor is assigned a separate and always present voltage, producing a “1” when “Open”.

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 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: microsales@micropac.com 2/24/04 Rev. D Pg. 6 of 7 53278 28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER Package Dimensions IN FUNCTION

1 FAULT STATUS

3 CONTROL RETURN

4 CONTROL

5 BUS RETURN

6 OUT (1A)

7 OUT SENSE

8 OUT (1A)

Note: For 1A output, connect Pins 6 and 7 or Pins 7 and 8; for 2A output connect Pins 6, 7 and 8. Pin 1 Pin 10

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 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: microsales@micropac.com 2/24/04 Rev. D Pg. 7 of 7 53278 28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER NOTES: 1) Initial current limits (NO TR IP and MUST TRIP) will be 6 and 9A for each of the 1A outputs. 2) 1A Output (Case pins 6 and 7 connecte d together). Output current per graph. 3) 2A Output (Case pins 6,7 and 8 connected together). Output current two times values of graph. CURRENT (Amps) per Output 2.4A 1.2A MUST TRIP LIMIT NO TRIP LIMIT GUARANTEED MUST TRIP LIMIT AT TA≥-18°C 0.01 0.1 1 10