深圳市中立信电子科技有限公司

Features 2 Applications

1• 300-kHz NMOS-NMOS Synchronous Buck • Power Tool and Portable Equipment

Converter • Personal Digital Assistants

• Stand-Alone Charger Specifically for Lithium • Handheld Terminals

Phosphate • Industrial and Medical Equipment

• 5-V–28-V VCC Input Operating Range, Supports • Netbook, Mobile Internet Device, and Ultra-Mobile

1–7 Battery Cells PC

• High-Accuracy Voltage and Current Regulation

– ±0.5% Charge Voltage Accuracy 3 Description

– ±3% Charge Current Accuracy The bq24630 is a highly integrated lithium phosphate

switched-mode battery charge controller. The device

– ±3% Adapter Current Accuracy offers a constant-frequency synchronous switching

• Integration PWM controller with high-accuracy charge current

– Automatic System Power Selection From and voltage regulation, charge preconditioning,

Adapter or Battery termination, adapter current regulation, and charge

status monitoring.

– Internal Loop Compensation

– The bq24630 charges the battery in three phases: Internal Soft Start

preconditioning, constant current, and constant

– Dynamic Power Management (DPM) voltage. Charge is terminated when the current

• Safety Protection reaches a minimum user-selectable level. A

– Input Overvoltage Protection programmable charge timer provides a safety

backup. The bq24630 automatically restarts the

– Battery Thermistor Sense Suspend Charge at charge cycle if the battery voltage falls below an Hot/Cold and Automatically ICHARGE/8 at internal threshold and enters a low quiescent current Hot/Cold or Warm/Cool sleep mode when the input voltage falls below the

– Battery Detection battery voltage.