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CYALKIT-E02 Solar-Powered BLE Sensor Beacon Reference Design Kit Guide, Doc. No. 002-11317 Rev. *C
52
Charging Operation
ON
ON
OFF
VOUT1
START
VSTORE1
400 uF
VSTORE2
200 mF
0V
0V
0V
VOUTH=3.24V
VOUTM=3.08V
(VOUTHx0.95)
CHRGE
CHRGE
CHRGE
CHRGE
CHRGE
CHRGE
CHRGE
CHRGE
CHRGE
CHRGE
The following are the details of the discharging and recharging operation and waveform.
1. When the VSTORE1 voltage achieves the VOUTH setting voltage (3.24 V), the surplus energy charges to VSTORE2.
2. Solar input is stopped.
3. The voltage decreases slowly due to load current.
4. When the VSTORE1 voltage achieves VOUTL (1.62 V), the VOUT1 turns off.
5. Solar input is started.
6. When the VSTORE1 voltage achieves the VOUTH setting voltage (3.24 V), the VOUT1 voltage turns on and charging
starts the surplus energy to VSTORE2.
Discharging and Recharging Operation
ON
ON
VOUT1
Solar Input is stopped
VSTORE1
400 uF
VSTORE2
200 mF
0V
0V
0V
VOUTH=3.24V
VOUTM=3.08V
(VOUTHx0.95)
CHRGE
VOUTH=3.24V
VOUTL=1.62V
VOUTL=1.62V
Solar Input is started
ON
ON
OFF
DISCHARGE
DISCHARGE
DISCHARGE
DISCHARGE
VSTORE1=
VOUTL(1.62V)
CHRGE
CHRGE
VOUT1 is OFF
CHRGE
CHRGE
1
2
3
4
1
2
3
4
5
6