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UM1806 Datasheet(PDF) 13 Page - STMicroelectronics

Part # UM1806
Description  EFL700A39 evaluation board kits and design-in board user guide
PDF  16 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM1806 Datasheet(HTML) 13 Page - STMicroelectronics

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DocID026737 Rev 1
13/16
UM1806
Use case with PV energy harvester
16
Step 2: Connection of the load for 100 ms
PB2 monitors the current in the EFL700A39. The load is mainly supplied with super cap
energy at the same time the EFL700A39 also participates. Voltage drops consequently from
some tens of mV.
Step 3: At the very beginning of disconnection of the load
PB2 monitors the current in the EFL700A39. The EFL700A39 is recharging the super-cap,
so current is still negative but reduces as the super-cap gets charged.
Figure 14. Step2 schema
Figure 15. Step2 picture
Power
management
PV
Rload
Super
cap
100 ms
« ON »
EFL700A39
Figure 16. Step3 schema
Figure 17. Step3 picture
Power
management
PV
Rload
Super
cap
10 s
« OFF »
EFL700A39



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