• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 267 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

UCC24624: IC heating up too much

Jilna Jayan
Prodigy 100 points
Part Number: UCC24624

Dear Sir,

We are using UCC24624 synchronous rectifier controller in 200W Power supply design.

Output spec is 24V/7.5A.

At 55 deg ambient IC is heating upto 105deg.

Could you please help with the design calculation of resistor placed between VSS pin & GND of the IC.

Regards,

Jilna Jayan

  • 0
    TI__Genius 9790 points

    Hi, Jilna

    could you test the voltage of VD1/2 when VG1/VG2 turned off? It will be used to calculate resistor between VSS pin to GND.

    BTW, increasing resistor between VG1/2 to Gate of SR MOSFET is also useful to decrease temperature of UCC24624.

    Yunsheng