2021-08-30 05:13 AM
I use the viper06HS to generate +3.3V. i follow the reference design provided by eDesignSuite.
When i turn on my system. the viper06HS provide 1.24V
do you idea?
I attach my schematic
Solved! Go to Solution.
2021-09-02 05:11 AM
I have modify my first schematic to generate +4V with VIPER06.
I have changed the value R2 by 100K and i have add a resistor of 470K to D4.1 and now it is works.
thanks for your help
2021-08-31 04:46 AM
The VIPER06HS is actually intended for isolated converters, but can also be used for non-isolated converters. Unfortunately you confused pin 1 (GND) with neutral, which leads to several errors:
Regards
/Peter
2021-08-31 06:21 AM
I have made the modification on my design. but i have 1.5V on the output
2021-08-31 06:33 AM
Can you please update the schematic?
Have you got a layout and/or photo for review?
/Peter
2021-08-31 06:54 AM
2021-08-31 07:31 AM
Hmm, just wires on a PCB doesn't sound like optimal wiring for a switching regulator.
Please make sure the FB wire is as short as possible and not below the inductors.
Also minimize the length of the wires between pin 1 (GND), D4.1 and L3.1. The connection between D4.2, C6 (-) and the output should also be minimized.
BTW: I forgot to mention one additional error - the compensation network C5 and C? should not be connected to D4.1, but to D4.2.
/Peter
2021-08-31 07:53 AM
I know the wire is not optimal but for the moment I try to solve my problem.
the feedback Wire is near viper on my design.
it is strange that the modifications do not correspond with the reference diagram
for example, i have the reference design of steval-blueplug on the schematic is very different
2021-09-01 06:52 AM
I have make all modification but i have always 1.5V
2021-09-02 05:11 AM
I have modify my first schematic to generate +4V with VIPER06.
I have changed the value R2 by 100K and i have add a resistor of 470K to D4.1 and now it is works.
thanks for your help