BQ24070 Datasheet, PDF (9/26 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

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bq24070
SLUS694A – MARCH 2006 – REVISED MARCH 2006
FUNCTIONAL DESCRIPTIONS
CHARGE CONTROL
The bq24070 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 1 through Figure 3,
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 1. Charge Profile
Charge
Complete
UDG−04087
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