Hi..We are using L7986TA IC in our buck converter circuit.Vin : 20.4VDC to 38VDCVout: 3.7VIout: 0.250AL : 15uHCin: 220uF x 3Cout: 470uF We are observing high ripple around 400mV above 30VDC supply..can u please help us resolve the issue.
Hi peter,Base on our testing we have finalised the following component values:R4: 2k2C4: 0.1ufC5:100pfR2: 5K6 parallel with 12kR1: 20kR3: 330ohmsC3: 100pFIs it okay to use these values..?
Hi Peter,Thanks for your suggestions. I have made the following changes.C3 0.47uF -> 10nFR3 2K7 -> 330EAll other values are unchanged. This config is giving me the best results for the entire voltage range of 19VDC to 38VDC the issue regarding voltag...
Okay Peter, I would check increasing the Pre load as per graph.. just to confirm i have used following values in the circuit : R4: 2k2C4: 0.1ufC5:100pfR2: 5K6 parallel with 12kR1: 20kR3: 2K7C3: 0.47uF in the datasheet it is given to choose value of R...
