BQ24105-Q1 Datasheet, PDF (19/35 Pages) Texas Instruments – SYNCHRONOUS SWITCHMODE, LI-ION AND LI-POLYMER CHARGE-MANAGEMENT IC WITH INTEGRATED POWER FETs ( bqSWITCHER™)

bq24105-Q1
www.ti.com................................................................................................................................................................................................. SLUS953 – AUGUST 2009
Figure 9. Battery Detection Waveform When a Battery is Inserted
Figure 10 shows the battery detection scheme when a battery is removed. Channel 3 is the output signal and
Channel 4 is the output current. When the battery is removed, the output signal goes up due to the stored energy
in the inductor and it crosses the V_OREG – V_RCH threshold. At this point the output current goes to 0A and the IC
terminates the charge process and turns on the I_DISCHG2 for t_DISCHG2. This causes the output voltage to fall down
below the V_OREG – V_RCHG threshold triggering a Battery Absent condition and starting the battery detection
scheme.
Figure 10. Battery Detection Waveform When a Battery is Removed
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): bq24105-Q1
Submit Documentation Feedback
19