GBD
0
- Joined
- Oct 25, 2010
- Messages
- 783
- Points
- 0
Ive made a boost converter style driver for a lab 445nM build. but I seem to have some issues with the output.
This driver is okay to run without a load, as my design just turns off the driver after too high voltage on the output, and likewise for the input (but also low limit to prevent the battery from draining too much).
but now when I put a load, I have it set to 4.8V, but just as I load it, the whole output sags down to 4.2V, and after that it will continue to go lower.
(went right down to the original input voltage).
this was tested with a dummy load of a 1ohm 5W resistor and 6 1n series diodes in series with it.
the battery itself is fine btw, stays at simular voltage levels and draws the appropriate current. ive also tested it yet again with a lab supply, and still the same results.
if anyone has any ideas to why its behaving in this manner, id love to hear your input.
This driver is okay to run without a load, as my design just turns off the driver after too high voltage on the output, and likewise for the input (but also low limit to prevent the battery from draining too much).
but now when I put a load, I have it set to 4.8V, but just as I load it, the whole output sags down to 4.2V, and after that it will continue to go lower.
(went right down to the original input voltage).
this was tested with a dummy load of a 1ohm 5W resistor and 6 1n series diodes in series with it.
the battery itself is fine btw, stays at simular voltage levels and draws the appropriate current. ive also tested it yet again with a lab supply, and still the same results.
if anyone has any ideas to why its behaving in this manner, id love to hear your input.