BQ25570_14 Datasheet, PDF (10/41 Pages) Texas Instruments – Ultra Low Power Harvester Power Management IC with Boost Charger, and Nano-Powered Buck Converter

bq25570
SLUSBH2C – MARCH 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, VOUT=1.80V, MPPT (V_OC) = 80%
L1 = 22 µH, L2 = 10 µH, CIN = CSTOR = 4.7 µF, CBYP=0.1 µF, CREF = 10 nF, COUT = 22 µF
R_OK1 = 5.62 MΩ, R_OK2 = 5.49 MΩ, R_OK3 = 1.87 MΩ, R_OV1 = 7.5 MΩ, R_OV2 = 5.36 MΩ,
R_OUT1= 8.66 MΩ, R_OUT2 = 4.22 MΩ
CSTOR
Solar ⁺
Cell
-
L1
CIN
CREF
Host
VSTOR
GPIO1
GPIO2
GPIO3
VBAT
VOC_SAMP
LBOOST
VREF_SAMP
VSS
VIN_DC
MPPT
EN
VOUT_EN
VBAT_OK
CBYP
VSTOR
+
BAT
VBAT
Boost
Controller
Buck
Controller
Cold Start
Nano-Power
Management
LBUCK
VOUT
L2
COUT
VSS
bq25570
System
Load
R_OV2
R_OK3
R_OV1
R_OK2
R_OK1
R_OUT2
R_OUT1
Figure 2. Typical Solar Application Circuit
10
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