TPS92692-Q1: For TPS92692 feedback compensation calculation

Hello Shelly,

1)  Yes, unless otherwise specified it is a typical value.

2) Please give me some time to review the example and see if there is a mistake.  What values did you get?    I would use the calculation tool for figuring out values based on your conditions.  https://www.ti.com/tool/download/SLVC687 

-fhoude

Hi fhoude,

About boost G0, wz, wp, my calculation is as shown in the following figure. The formula 63 given in datasheet does not match my equation, and the G0 calculated by the calculation tool under the same conditions is 13.8dB, which is not the same as the 2.184 given in datasheet.
Could you please provide detailed reasons and the derivation process?

Thank you!

how did you get the Rd (LED string resistance)?  You have it as 4.2? where did that come from?

Sorry, I didn't tell you in time that 4.2 Ω is the value that our customers have taken, but if the 3 Ω given by datasheet, we can calculate G0 is 5.0809, it is not the same as the datasheet (include wz, wp). Since our customers are confused about this, could you please give a specific answer and derivation process as soon as possible? 

Thank you!

Hi fhoude,

Greetings. Kindy want to now is there any updated for this case here? If Yes, could you pls outline the process on formula derivation. Customer request is urgent, which might impact on the biz. 

Thank you.

Hi fhoude,

Thank you for your response and I will advise the customer that the calculation tool will take precedence. Could you please correct the datasheet and issue a new version?

Thank you!