I intend to use the LM2670 for a buck converter design Vin = 26 to 34V Vout fixed 12V I = 3A
when I vary the input voltage on a fixed load, the current rises normally, then is limited to 300mA to 500mA , the more I raised the input voltage the more the current drops.
I tried various inductors , it does not change anything, I also measure with a scope the output current , I do not see very high ripple .
basically I cannot ouput current in a 2-3Amps region , I think the IC protects itself , by limiting the current
please let me know how to overcome this ?
thanks:)
