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ULN2003A: Collector-Emiter saturation voltage

Part Number: ULN2003A

Hi team, 

My customer has are considering the ULN2003A in a new product development and had a question: .

They have always used the ULN to switch 24V relays, now they would like to use this for 5V relays. 
But then the VCE Saturation Voltage gets in the way: According to the data sheet, this is max. 1.1V at 100mA collector current.
But their relays operate at approx. 80mA. Can you perhaps find out what the maximum Vce-Saturation Voltage is at 80mA and 0 ° C? There is already a very helpful diagram in the data sheet, but unfortunately only for typical values ​​and 25 ° C:
Can you please inform how high the VCE sat. @Tj 0-85°C at input of 4V/80mA is? 


Thanks for the support,

BR, Obinna.
  • Obinna,

    Unfortunately we don't have a comprehensive characterization which i could give you a definite range, not even in production/char data. I will suggest the following to approximate the VCE_sat though.

    VCE_sat increases with decreasing temperature, so at Tj=-40C is where you should see the vce_sat at its minimum.

    Based on Fig7 of d/s, i extrapolate the lines -20mA to give the max-> typ range. between 0-85C you should be pretty close to 1V with just a bit of variation.

    Basically, i suggest take the Typical value and fudge +15% for 0C, or just about half-way between Max/typical plots.

    There is not a ton of variation at the low collector currents so it should be close with some degree of accuracy.

    Sorry i couldn't give a definite answer but hope this helps some.

    best

    dimitri