Hi all,
I am trying to design a power converter using the A69863V3TR and I am having some issues.
I have followed the design section in the datasheet and used the online eDesignSuite to design a 3.3V DC/DC converter.
The circuit has now been manufactured.
Firstly, when the circuit was turned on, at 24V, it did output 3.3V but with a large output ripple ~40%. The output ripple is due to the capacitor used, but there was another major issue. After I increased the voltage from 24V to 33V, the IC seemed to have set its output to ~0.8V and now when the voltage is lowered, the output remains at ~0.8V. I could see that it was outputting pulses to the inductor.
I have attached the eDesignSuite circuit that has been realized.
If anyone has any advice please let me know.
https://eds.st.com/dcdc/?msg=%7B%22data%22%3A%7B%22application%22%3A%22dcdc_html%22%2C%22specs%22%3A%7B%22ic%22%3A%22a6986f3v3%3Abuck%22%2C%22input%22%3A%7B%22v%22%3A%7
I have also attached a screenshot of my Altium drawing.
