Part Number: TPS923650
Other Parts Discussed in Thread: TPS923652
Hello,
I would like to ask for clarification about some of the TPS923650 characteristics. I am looking for a buck-boost converter supplied by about 24V to supply an LCD backlight of 20mA which may have a forward voltage of around 24V also (hence buck-boost).
The first question I have is whether the chip will be able to supply 20mA with no dimming, and even dim below this level. When doing the inductor calculation using ripple, the inductor value comes out to something very large. If I choose a much smaller inductor, I believe this would cause discontinuous current mode, correct? Can the TPS923650 support this mode? Are there any differences in the compensation components or other components in this case?
Secondly, I also want to support the option of a backlight of 140mA at 10V, which I am assuming should be as simple as adding or removing a parallel resistor to r_sense to change the output current. Is this correct?
Finally, I saw there is a preview simulation model available upon request. I would love to get this if possible.
I apologize for all of the questions, I am a university student working on a project and want to make sure I get everything right. Thank you in advance for the help!
