• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 62 subscribers
  • Views 164 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.

Original question:

UCC21520: UCC21520: High Side Failure

UCC21520: UCC21520

MANOJ M
Prodigy 20 points
Part Number: UCC21520

Hi Experts,

I am using UCC21520 to drive led lamps ,So the issue is that the output side of the IC is getting shorted by a surge of as little as 1.5V above our 24V supply(Total of 25.5V for the IC which is it's upper cap). So could you please suggest if any circuit changes required to avoid spike, surge during switching and also if higher rating  IC is available with similar channel support. The surge is mainly happening while connecting supply wires, when there is a little spark produced at the contact.

  • 0
    TI__Guru**** 189399 points

    Hi, Manoj,

    Welcome to e2e, and thanks for your interest in our products.

    The UCC21520 IC is a MOS gate driver designed to drive the capacitive gate of a power MOSFET, IGBT, SiC FET, or GaN FET. Your post makes it sound like you might be trying to drive the LEDs directly with our chip? It is, unfortunately, not capable of driving continuous current into a load like that.

    TI manufacturers LED driver ICs. You can start by looking here:  

  • 0 in reply to Don Dapkus
    Prodigy 20 points

    Hi Don Dapkus, 

    But application note in datasheet indicates it can be used for LED Lighting. 

    Also, our power consumption is as low as (24V * 0.2A)

     

  • 0 in reply to MANOJ M
    TI__Guru**** 189399 points
    Hi, Manoj, Sorry that billeted list is a little confusing. It is referring to the LED power off-line power supply, not the LEDs themselves. Please look at the selection guide for TIs dedicated LED drivers. The UCC21520 is not designed to drive LED load.