BQ24152 Datasheet, PDF (13/38 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24152
www.ti.com ...................................................................................................................................................................................................... SLUS847 – JUNE 2008
OPERATIONAL FLOW CHART
Power Up
VBUS>VUVLO
VAUXPWR<VLOWV
and bq24152?
No
High Impedance Modeor Host
Controlled Operation Mode
Reset and Start
32-Minute Timer
POR
Load I²C Registers
Yes
with Default Value
/CE=LOW
Disable Charge
Charge Configure
Mode
/CE=HIGH
Any Charge State
Wait Mode
Delay TINT
Disable Charge
Indicate Power
not Good
VAUXPWR<VSHORT?
No
Yes
No
Enable ISHORT
Indicate Short
Circuit condition
Yes
VBUS<VIN(MIN)?
No
32-Minute
Timer Expired?
Regulate
Input Current, Charge
Current or Voltage
Yes
Indicate Charge-In-
Progress
Yes
VBUS<VIN(MIN)?
Yes
No
32-Minute
No
Timer Expired?
Yes
Turn Off Charge
Enable IDETECT for
tDETECT
Turn Off Charge
Indicate Fault
/CE=HIGH
No
VAUXPWR<VSHORT?
No
Termination Enabled
ITERM detected
and VAUXPWR>VOREG-VRCH
?
Yes
Yes
VAUXPWR < VOREG -
VRCH?
No
32-Minute Timer
Active?
Yes
Charge Complete
High Impedance
Mode
Battery Removed
Yes
Reset Charge
Parameters
Wait Mode
Delay TINT
No
No
Charge Complete
Indicate DONE
VAUXPWR < VOREG -
VRCH?
Yes
Figure 23. Operational Flow Chart of bq24152 in Charge Mode
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): bq24152
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