Hi Ti Team:
I have a project Vin 9~16V ,Vout 12~15V ，Iout 1A~1.2A ,buck-boost topologic.
I think the typical application in datasheet have too many surrouding parts ,could you please give me a simple one that only can archive basic function?
My mail :henrysh.li@arrowasia.com
Hello Henry,
You can refer to:
It is simplified with no PWM dimming FET and will do what you need as is if you connect the anode of the LED string to LED+ and the cathode of the string to the positive terminal of C10 (the input) to form a buck-boost. If you need to simplify further you can do the following:
1. If there are no EMI requirements you can short all of the L's except L2 of course.
2. If analog dimming is not needed you can just set a voltage from VCC with a divider to IADJ and delete R16, R17, and C28.
That circuit should work for you and you can likely reduce the number of capacitors if you need to. You could also choose non-Q grade components if there is no automotive requirement.
Regards,
Clint
