Excuse me, the peripheral circuit of XL6009?

1, the resistance of the sampling potentiometer for adjusting the output voltage is too large. The formula for calculating the output voltage Vout of XL6009 is: 1. 25( 1+R2 /R 1), compared with 1K, according to the resistance of the 25K sampling potentiometer, the output voltage is 32.5v. The maximum input voltage of XL 6009 is 30V, and the input voltage of the four pins of XL6009 is required to be higher than its output voltage to output 32.5v..

2. Three XL6009 sampling terminals cannot be directly connected in parallel;

3. Three XL6009 connected in parallel to expand current are not conducive to load overcurrent protection;

4. It is suggested to use linear adjustable power supply with constant current protection instead of switching power supply for the experiment. The harmonic radiation of switching power supply is not conducive to the experiment.