BQ25015

单芯片充电器和DC / DC转换器IC为便携式应用 SINGLE-CHIP CHARGER AND DC/DC CONVERTER IC FOR PORTABLE APPLICATIONS

The bq25015/7 are highly integrated charge and power management devices targeted at space-limited bluetooth applications. The bq25015/7 devices offer integrated power FET and current sensor for charge control, reverse blocking protection, high accuracy current and voltage regulation, charge status, charge termination, and a highly efficient and low-power dc-dc converter in a small package.

The bq25015/7 devices charge the battery in three phases: conditioning, constant current and constant voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup safety feature for charge termination. The bq25015/7 automatically re-starts the charge if the battery voltage falls below an internal threshold. The bq25015/7 automatically enters sleep mode when VCC supply is removed.

The integrated low-power high-efficiency dc-dc converter is designed to operate directly from a single-cell Li-ion or Li-Pol battery pack. The output voltage is either adjustable from 0.7 V to VBAT, or fixed at 1.8 V bq25017 and is capable of delivering up to 300-mA of load current. The dc-dc converter operates at a synchronized 1 MHz switching frequency allowing for the use of small inductors.

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Li-Ion Or Li-Pol ChargeManagement and Synchronous DC-DC Power Conversion In a Single Chip

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Charges and Powers the System from Either the AC Adapter or USB with Autonomous Power Source Selection

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Integrated USB Charge Control with Selectable 100 mA and 500 mA Charge Rates

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Integrated Power FET and Current Sensor for Up to 500 mA Charge Applications AND 300 mA DC-DC Controller with Integrated FETs

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Reverse Leakage Protection Prevents Battery Drainage

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Automatic Power Save Mode For High Efficiency at Low Current, or Forced PWM for Frequency Sensitive Applications

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APPLICA ONS

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MP3 Players

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PDAs, Smartphones

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Digital Cameras