• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 14 subscribers
  • Views 209 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.

Original question:

SN6507: Poor efficiency with SN6507 with low output current

SN6507-Q1: Input current exceeding 0.5A limit

Vishwas H R
Intellectual 330 points
Part Number: SN6507-Q1

Tool/software:

Hello team,

I have bulk capacitor at output and limitting the current using discrete circuit.

Input voltage is around 6V.

1. During normal operation input current is less than 0.5A but during the charging of capacitor it would be around 0.7A for 0.6s. Is it ok for this time?

2. Let's say current limit is set to 1.3A and if the current is around 0.7A for long time also will it work without any problem? (because power is less as input voltage is less)

Thank you,

  • 0
    TI__Genius 10330 points

    Hi Vishwas,

    The recommended operating current for the device is 0.5A max. Operating above recommended spec may not assure device performance. 

    Thanks. 

  • 0 in reply to Shinu.V.Mathew
    Intellectual 330 points

    Hello Mathew,

    The current limit mentioned in the datasheet is typ 1.3A. Is the current mentioned is average/ peak? (if it is peak, what is the ripple factor considered and is there any formula used to calculate)

    How this value is quantified? (I mean during which test condition this value is derived)

    Thank you,

  • +1 in reply to Vishwas H R
    TI__Genius 10330 points

    Hi Vishwas,

    The 1.3A mentioned in datasheet is the ILIM set value to generating OCP for peak currents. This is for the purpose of selecting a current sense resistor, we choose the resistor value based on the peak current. But for the purpose of thermal calculation, power dissipation, OTP, etc, we use the RMS current values which is 400mA/500mA as shown in the ROC table. Since you are venturing beyond what the data sheet recommends, I suggest to test the EVM under such electrical and environmental conditions as required.

    Thanks.