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DEI1028-SKS-G

The DEI1028 is a control circuit for a 28VDC power bus voltage clamp. It is designed for use as the front end to a 28VDC input power supply to provide transient voltage protection. It controls the gate drive of a P-Channel power MOSFET to linearly clamp the output during over-voltage transients. The output voltage is maintained below the clamping threshold of 35V (max) which is adequate to protect most Commercial-Off-The-Shelf switching supplies, linear regulators, and op amps.


Features

  • Protection for power electronics on 28VDC avionics or industrial power bus to DO-160, Category Z, Abnormal Surge Voltage (DC) levels.
  • Controls power P-FET to clamp transient at 34V.
  • Small foot print (8L SOIC NB).
  • Wide input voltage range.
  • Programmable Undervoltage Lockout.
  • Logic compatible On/Off input.
  • Stable over temperature.
  • Soft start delay.

Attributes

temp range: -55 to 105
product package type: 8 SOIC NB G
burn in:
channels: 1
lightning protection:
Years to EOL: 10
package description: 8 Pin Plastic SOIC - .150 Body
package type: Surface Mount
package pic: 8L SOIC Plastic.png
jedec: DS-MW-01028-01 (H)
RoHS: MS-012-AA
product status:
Replacement PN: Active

Functional Description:

The DEI1028 is a control circuit for a 28VDC power bus voltage clamp. It is designed for use as the front end to a 28VDC input power supply to provide transient voltage protection. It controls the gate drive of a P-Channel power MOSFET to linearly clamp the output during over-voltage transients. The output voltage is maintained below the clamping threshold of 35V (max) which is adequate to protect most Commercial-Off-The-Shelf switching supplies, linear regulators, and op amps.

There is an Undervoltage Lockout feature that shuts the Power MOSFET off when the input voltage is below a user programmed threshold. An open collector logic output annunciates the under-voltage status. There is also a logic on/off input which may be used to control the power circuit. An external capacitor may be used to set a delay from when input power is applied to when the MOSFET is turned on.

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