Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 13 subscribers
  • Views 106 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.

SN6507: Calculating RDC using duty cycle equation

Gang Du
Prodigy 30 points
Other Parts Discussed in Thread: SN6507-Q1

400kHZ means Rclk = 30k ?

If I want to 40% duty cycle, VCC= 14.5 V, Rdc = 145kΩ？

I want to reduce the static power consumption. Maybe reducing the fSW will be helpful.

----------------------------------------------------------------------

PS: Is there anything wrong in the datasheet? Duty cycle has nothing to do with Rilim.

  • 0
    TI__Mastermind 22115 points

    Hello Gang, 

    I went ahead and created a new thread from your reply since it was a different topic. Please see the answers to each question below.

    1. 400kHZ means Rclk = 30k?
      1. Yes, that is correct.
    2. If I want to 40% duty cycle, VCC= 14.5 V, Rdc = 145kΩ
      1. Yes, is there a reason why you want to change the duty cycle? 
    3. I want to reduce the static power consumption. Maybe reducing the fSW will be helpful.
      1. Even when you reduce the switching frequency, the current will not change much.
    4. PS: Is there anything wrong in the datasheet? Duty cycle has nothing to do with Rilim.
      1. Yes, Rilim should say RCLK = 9.6. The SN6507-Q1 datasheet has been fixed/updated. 

    Best,
    Andrew