![Cypress CYALKIT-E02 Reference Design Kit Manual Download Page 82](http://html1.mh-extra.com/html/cypress/cyalkit-e02/cyalkit-e02_reference-design-kit-manual_2706362082.webp)
Advanced Topics
CYALKIT-E02 Solar-Powered BLE Sensor Beacon Reference Design Kit Guide, Doc. No. 002-11317 Rev. *C
82
Solar and Battery Operation
Battery
VOUT1
START
VSTORE1
400 uF
VSTORE2
200 mF
0V
0V
0V
VOUTH=3.24V
VOUTM=3.08V
(VOUTHx0.95)
CHRGE
CHRGE
CHRGE
VDD
Solar Input
0V
VBAT
Battery Input
0V
VOUTL=1.62V
CHRGE
CHRGE
Solar Input is stopped
Solar Input is started
Solar
Battery
Solar
A.2
Charging the Supercapacitor
The supercapacitor (SC1) on the Solar BLE Sensor is charged when the Solar BLE Sensor is connected to the Debug Board
via USB. For example, the supercapacitor is charged half voltage from 0 V when it is connected via USB for two minutes or
more. To fully charge, it needs ten minutes or more.
The following is the block diagram to charge the supercapacitor from USB.
2
1
3
4
5
6