bq25505
SLUSBJ3B –AUGUST 2013–REVISED JANUARY 2014
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TYPICAL APPLICATION CIRCUITS
VBAT_OV = 3.11 V, VBAT_OK = 2.39 V, VBAT_OK_HYST = 2.80 V, MPPT (VOC) = 80%
L1 = 22 µH, CIN = CSTOR = 4.7 µF, CBYP=0.1 µF, CREF = 10 nF
ROK1 = 5.62 MΩ, ROK2 = 5.49 MΩ, ROK3 = 1.87 MΩ, ROV1 = 7.5 MΩ, ROV2 = 5.36 MΩ
CSTOR
CBYP
+
SEC_BAT
(rechargeable)
VSTOR
VBAT_SEC
VOC_SAMP
LBOOST
L1
VBAT_PRI
TPS62736
Ideal Diode OR
+
VREF_SAMP
PRI_BAT
Boost
Controller
CIN
+
-
VBAT_OK
Solar
Cell
CREF
System
Load
VB_PRI_ON
VSS
MPPT
VB_SEC_ON
VIN_DC
Cold Start
Nano-Power
Management
VSTOR
VBAT_SEC
Host
GPIO1
GPIO2
EN
VBAT_OK
bq25505
ROV2
ROV1
ROK3
ROK2
ROK1
Figure 2. Typical Solar Application Circuit with Primary and Secondary Batteries
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