BQ25570_14 Datasheet, PDF (14/41 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
HIGH-LEVEL FUNCTIONAL BLOCK DIAGRAM
LBST
VSTOR
VBAT
LBUCK
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VSS
VIN_DC
Cold-start
Unit
Enable
Interrupt
PFM Boost Charger
Controller
PFM Buck
Controller
Enable
VOC_SAMP
VREF_SAMP
MPPT
Controller
BAT_SAVE
VREF
OT
Temp
Sensing
Element
Bias Reference &
Oscillator
VREF
Battery Threshold
Control
OK
Vref
VBAT_UV
EN
VBAT_OV VRDIV
Figure 6. High-Level Functional Diagram
VOUT
VOUT_SET
VOUT_EN
VSS
VBAT_OK
OK_PROG
OK_HYST
14
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