BQ24630数据手册集成电路（IC）的电池充电器规格书PDF

描述 Description

The bq24630 is a highly integrated lithium phosphate switched-mode battery charge controller. The device offers a constant-frequency synchronous switching PWM controller with high-accuracy charge current and voltage regulation, charge preconditioning, termination, adapter current regulation, and charge status monitoring.The bq24630 charges the battery in three phases: preconditioning, constant current, and constant voltage. Charge is terminated when the current reaches a minimum user-selectable level. A programmable charge timer provides a safety backup. The bq24630 automatically restarts the charge cycle if the battery voltage falls below an internal threshold and enters a low quiescent current sleep mode when the input voltage falls below the battery voltage.

特性 Features

• 300-kHz NMOS-NMOS Synchronous Buck Converter
• Stand-Alone Charger Specifically for Lithium Phosphate
• 5-V–28-V VCC Input Operating Range, Supports 1–7 Battery Cells
• High-Accuracy Voltage and Current Regulation
• ±0.5% Charge Voltage Accuracy
• ±3% Charge Current Accuracy
• ±3% Adapter Current Accuracy

• Integration
• Automatic System Power Selection From Adapter or Battery
• Internal Loop Compensation
• Internal Soft Start
• Dynamic Power Management (DPM)

• Safety Protection
• Input Overvoltage Protection
• Battery Thermistor Sense Suspend Charge at Hot/Cold and Automatically ICHARGE/8 at Hot/Cold or Warm/Cool
• Battery Detection
• Reverse Protection Input FET
• Programmable Safety Timer
• Charge Overcurrent Protection
• Battery Short Protection
• Battery Overvoltage Protection
• Thermal Shutdown

• Status Outputs
• Adapter Present
• Charger Operation Status

• Charge Enable Pin
• 6-V Gate Drive for Synchronous Buck Converter
• 30-ns Driver Dead Time and 99.95% Max. Effective Duty Cycle
• 24-Pin 4-mm × 4-mm QFN Package
• Energy Star Low Quiescent Current Iq
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• APPLICATIONS
• Power Tool and Portable Equipment
• Personal Digital Assistants
• Handheld Terminals
• Industrial and Medical Equipment
• Netbook, Mobile Internet Device, and Ultra-Mobile PC

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