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FUNCTIONAL DESCRIPTIONS

CHARGE CONTROL

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

Current

Charge

Complete

UDG−04087

Charge

Voltage

bq24070

SLUS694A – MARCH 2006 – REVISED MARCH 2006

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.

Figure 1. Charge Profile

9

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