Design power circuit for 10W Solar panel

surya

Other Parts Discussed in Thread: LM317, TPS62125, TPS62175

Dear Ti,

i have a 12V/10W (600ma- Short circuit maximum current) solar panel for power up my cc3220 customized board with hx711 for weighing scale. i want to design just power circuit for power up my modules when solar give some output. and shutdown the module when solar energy is disappear. i was already complete this design with LM317 regulator. but i want complete this same design with another best regulator for get better result for my need. anybody can please suggest any other regulators for my design.

Note: i don't use battery for power backup, i just power up my module when solar energy is appear there and shutdown the module when solar energy is disappear there.

thank you

over 6 years ago

0 Chris Glaser over 6 years ago

TI__Guru**** 150950 points

Hi Kannannatesh,

What output voltage and output current do you need? What is the open circuit voltage for your panel?

The TPS62125 is likely a good device to use, as it has a precise EN input which allows you to easily turn off the DC/DC when the solar panel voltage is too low. Here is an app note for supplying a load which draws more current than the panel can provide: www.ti.com/.../slyt478.pdf This is maybe not your exact application case.

0 surya over 6 years ago in reply to Chris Glaser

Expert 2395 points

dear chris,
thanks for your reply and suggestions.
my panel open circuit voltage is 21V. voltage at Pmax=17.3V, current at Pmax = 0.57A, Class A type.
i want just power up my cc3220 customized board, hx711(10milli amps), and 80kg beam type loadcell,
This TPS62125 available in other package like through hole package. because i just make a model design with dot PCB.

thank you

with regards
kannannatesh

0 Chris Glaser over 6 years ago in reply to surya

TI__Guru**** 150950 points

Thanks for explaining. Those voltages are quite a bit higher than the 12V that you initially mentioned. So, you will need the 28V rated TPS62175.

DIP packages are very old and not used anymore. You can find some older options on our parametric search: www.ti.com/.../products.html

0 surya over 6 years ago in reply to Chris Glaser

Expert 2395 points

Dear Chris,

thanks for your support.

with regards
kannannatesh

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Design power circuit for 10W Solar panel