LM3495EVAL: LM3495EVAL

Adjagbe,

What current limit are you seeing in your test?  I calculate 8.82 A with 1.5 kohm.  Any other modifications to the EVM?

John Tucker,

i'm not seeing any limitation in my test, i had the same result as yours but i changed the RFb1 so i can have 3.7V as output with 51K resistor

best regards,

Adjagbe

Adjagbe,

How are you testing it?  What type of load are you using?  I may have to order an EVM to check it.

John,

How are you testing it?

I'm using a probe to check the current on the oscilloscope

What type of load are you using

i have 8 LEDS 3.7V for 1A each

i need to limit the current because my LED absolute rating in curent is 1.1A 

best regards

adjagbe

Adjagbe,

Can I see the waveform?  What is your LED part number?

hello John,

I made a new set up to test my theory:

i took a new evaluation board and try to limit the current at 1A so i use as Rilim=500mOHM, that work perfectly

-since i want to have an output votage of  3.7V with 12V as a Vin,

 i changed the Rfb2 = 51.3kOhm with the current limitation at 1A with a load of 2 Ohm, i don't have the limitation at 1A i got 2.24A

I don't understand how the Rfb2 modification can impact the current limitation.

best regards,

Adjagbe