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| BQ25570_14 Datasheet, PDF (12/41 Pages) Texas Instruments – Ultra Low Power Harvester Power Management IC with Boost Charger, and Nano-Powered Buck Converter | |||
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bq25570
SLUSBH2C â MARCH 2013 â REVISED JANUARY 2014
www.ti.com
VBAT_OV = 3.31 V, VBAT_OK = 2.82 V, VBAT_OK_HYST = 3.12 V, VOUT = 1.30V, MPPT (VOC) = 40%
L1 = 22 µH, L2 = 10 µH, CIN = CSTOR = 4.7 µF, CBYP=0.1 µF, CREF = 10 nF, COUT = 22 µF
ROK1 = 4.99 Mâ¦, ROK2 = 6.65 Mâ¦, ROK3 = 1.24 Mâ¦, ROV1 = 6.98 Mâ¦, ROV2 = 5.76 Mâ¦
ROUT1 = 12.1 Mâ¦, ROUT2 = 0.909 Mâ¦, ROC1 = 8.06 Mâ¦, ROC2 = 12 Mâ¦
MA4X79600LCT-ND
Vibration
Element
MA4X79600LCT-ND
L1
CIN
CREF
VSTOR
VBAT
GPIO1
Host GPIO2
GPIO3
CSTOR
ROC2
ROC1
VOC_SAMP
LBOOST
CBYP
VSTOR
+
BAT
VBAT
VREF_SAMP
VSS
VIN_DC
MPPT
EN
VOUT_EN
VBAT_OK
Boost
Controller
Buck
Controller
Cold Start
Nano-Power
Management
LBUCK
VOUT
VSS
bq25570
L2
COUT
System
Load
ROV2
ROK3
ROV1
ROK2
ROK1
ROUT2
ROUT1
(1) See the Capacitor Selection section for guidance on sizing CSTOR
Figure 4. Typical Externally Set MPPT Application Circuit
12
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