Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

  • State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 65 subscribers
  • Views 99 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ULN2803C: power rating of this device

Cindy Chang
Intellectual 2475 points
Part Number: ULN2803C

Hi Expert,

We are going to have a design with 24Vin and 24Vout with 500mA/ch solution as digital output.

We're wondering that if ULN2803C could make it? Or is there other solutions could fulfill this requirement?

Thank you.

Best Regards,

Cindy

  • 0
    TI__Genius 15665 points

    Hi Cindy, 

    How many channels are you needing? The ULN2803C can drive 500mA if only one channel is used.

    If more channels are added the current rating of each channel is derated depending on the number of outputs conducting simultaneously and the duty cycle.

    Please further describe your loading conditions for this system. 

    Best Regards, 

    Elizabeth 

  • 0 in reply to Elizabeth Higgins
    TI__Intellectual 2475 points

    Hi Elizabeth,

    Customer need 8 ch as source type digital output. At first they're finding 3.3V GPIO to 24V digital output solutions with 20mA/ch so we find ULN2803C. However, customer also wondering that could it achieve 24Vin 24Vout and support 500mA at each channel.

    Thank you.

    Best Regards,

    Cindy

  • 0 in reply to Cindy Chang
    TI__Genius 15665 points

    Hi Cindy, 

    I have reached out to our internal team to see if we can provide any data on the current capability with all channels conducting simultaneously, however this will not be up to 500mA at each channel when all channels are conducting at the same time. 

    Do you know what duty cycle the customer is intending to operate at? 

    Best Regards, 

    Elizabeth