FEATURES

· Dynamic Power Management, DPM Minimizes

Battery Charge Time

· Integrated Selector Supports Battery

Conditioning and Smart Battery Learn Cycle

· Zero Volt Operation

· Selector Feedback Circuit Ensures

Break-Before-Make Transition

· ±0.4% Charge Voltage Accuracy, Suitable for

Charging Li-Ion Cells

· ±4% Charge Current Accuracy

· 300-kHz Integrated PWM Controller for

High-Efficiency Buck Regulation

· Depleted Battery Detection and Indication to

Protect Battery From Over Discharge

· 20-μA Sleep Mode Current for Low Battery

Drain

· 24-Pin TSSOP Package and 5 mm ′ 5 mm QFN

package (bq24703 only)

DESCRIPTION

The bq24702/bq24703 is a highly integrated battery

charge controller and selector tailored for notebook

and sub-notebook PC applications.

The bq24702/bq24703 uses dynamic power

management (DPM) to minimize battery charge time

by maximizing use of available wall-adapter power.

This is achieved by dynamically adjusting the battery

charge current based on the total system (adapter)

current.

The bq24702/bq24703 uses a fixed frequency, pulse

width modulator (PWM) to accurately control battery

charge current and voltage. Charge current limits can

be programmed from a keyboard controller DAC or

by external resistor dividers from the precision 5-V,

±0.6%, externally bypassed voltage reference (VREF), supplied by the bq24702/bq24703.