I finally got the new boards and have the converter buit as follows:
**broken link removed**
**broken link removed**
My problem is in high mode, R2 is set at 3.66K which is supposed to give me 850ma but i'm only getting around 500mA!!
Does anyone have an explaination for this? 20K works at 150ma and if I set it to 8.66K, I get 350ma as calculated. 850mA is not achievable. I am wondering if the inductor @ 4.7uh is not enough. Thanks for your input!
**broken link removed**
**broken link removed**
My problem is in high mode, R2 is set at 3.66K which is supposed to give me 850ma but i'm only getting around 500mA!!
Does anyone have an explaination for this? 20K works at 150ma and if I set it to 8.66K, I get 350ma as calculated. 850mA is not achievable. I am wondering if the inductor @ 4.7uh is not enough. Thanks for your input!