• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 271 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.

Soft start capacitor maximum value for UCC28600

Manoj Tyagi
Prodigy 110 points
Other Parts Discussed in Thread: UCC28600

I have a UCC28600 based SMPS which is capable of delivering 5V@ 0.2Amp and 7.5V@0.15Amp but  with my load ( an electronic board built around ARM processor LM3S815 requiring 120mA at full load) connected to it the output voltage is not stabilized at it's steady state values. So i just increased the soft start capacitor from 100nF to 10uF. with this high value of capacitor, supply is providing proper output with a delay of 3-4 seconds but it is getting stabilized with load connected to it.

Can we use this much capacitor on soft start pin. 

Plz clarify.

rgds

  • 0
    TI__Genius 15910 points

    I don't believe there would be aproblem using a large capacitor on the uCC28600 SS pin except some custoomers would not be happy with such a long start up time. 

    Using a more conventional load (like, say, a resistor...) does the circuit perform well with the 100 nF SS capacitor?  Did you rule out any other causes of this problem?