BQ24158_12 Datasheet, PDF (36/45 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger

bq24153A, bq24156A
bq24158, bq24159
SLUSAB0A – OCTOBER 2010 – REVISED FEBRUARY 2012
VBUS
VIN
C1
PMID
C2
High
Frequency
Current
Path
L1
R1
SW
PGND
C3
Figure 39. High Frequency Current Path
Charge Current Direction
R _SNS
To Inductor
To Capacitor and battery
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V _BAT
BAT
Current Sensing Direction
To CSIN and CSOUT pin
Figure 40. Sensing Resistor PCB Layout
Vin+
Vin–
1µF
4.7µF
VBUS
PMID
SW
PGND
Figure 41. Input Capacitor Position and PCB Layout Example
36
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