BQ24040 Datasheet, PDF (11/31 Pages) Texas Instruments – 800mA Single-Input Single Cell Li-Ion Battery Charger With Auto Start

bq24040
bq24041
www.ti.com.................................................................................................................................... SLUS941A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009
TYPICAL OPERATIONAL CHARACTERISTICS (continued)
SETUP: bq24040 typical applications schematic; V_IN = 5V, V_BAT = 3.6V (unless otherwise indicated)
Vpg _2V/div
Vchg
2V/div
Vts
Viset
2V/div
500mV/div
t - time - 50ms/div
10kΩ resistor from TS to GND. 10kΩ is shorted to disable the
IC.
Figure 7. TS Enable and Disable
Vpg _5V/div
Vchg
2V/div
Vout
2V/div
Battery Detect Mode
Vin
5V/div
t - time - 20ms/div
Fixed 10kΩ resistor, between TS and GND.
Figure 8. Hot Plug Source w/No Battery – Battery Detection
Vin
2V/div
Vout
500mV/div
Viset _1V/div
Vts
2V/div
t - time - 5ms/div
Figure 9. Battery Removal – GND Removed 1st, 42 Ω Load
Vout
1V/div
Vchg
5V/div
Vout
Vchg
Viset
1 Battery Detect Cycle
1V/div
5V/div
1V/div
Vts
1V/div
Entered TTDM
t - time - 10ms/div
Figure 10. Battery Removal with OUT and
TS Disconnect 1st, With 100 Ω Load
Battery Declared Absent
Viset
1V/div
V_0.1 W_OUT
100mV/div
t - time - 20ms/div
Continuous battery detection when not in TTDM.
Figure 11. Battery Removal with fixed TS = 0.5V
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): bq24040 bq24041
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