BQ24070RHLRG4 Datasheet, PDF (9/31 Pages) Texas Instruments – SINGLE-CHIP LI-ION CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

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SIGMA
bq24070
bq24071
SLUS694F – MARCH 2006 – REVISED DECEMBER 2009
FUNCTIONAL DESCRIPTIONS
4.44
4.42
V_OUT, V_AC = 5.5 V
I_I = 100 A
+3 Sigma
4.4
4.38
Mean
4.36
4.34
-3 Sigma
4.32
-60 -40 -20
0
20 40 60 80 100 120 140
T - Temperatures - ^oC
Figure 1. Typical OUT Voltage Regulation, bq24070
CHARGE CONTROL
The bq24070/1 supports a precision Li-ion or Li-polymer charging system suitable for single-cell portable devices.
See a typical charge profile, application circuit, and an operational flow chart in Figure 2 through Figure 4,
respectively.
Pre-Conditioning
Phase
Current Regulation Phase
Voltage Regulation and Charge Termination Phase
Regulation
Voltage
Regulation
Current
Minimum
Charge
Voltage
Pre−
Conditioning
and Term
Detect
Charge
Voltage
Charge
Current
Figure 2. Charge Profile
Charge
Complete
UDG−04087
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Product Folder Link(s): bq24070 bq24071
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