BQ24620数据手册集成电路（IC）的电池充电器规格书PDF

描述 Description

The bq24620 device 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, and charge status monitoring.

The bq24620 charges the battery in three phases: preconditioning, constant current, and constant voltage.

特性 Features

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

• Integration
• Internal Loop Compensation
• Internal Soft Start

• Safety
• Input Overvoltage Protection
• Battery Thermistor Sense Suspend Charge at Hot/Cold Charge Suspend and Automatically ICHARGE/8 at WARM/COOL
• Battery Detection
• Built-In 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% Maximum Effective Duty Cycle
• 16-Pin 3.5-mm × 3.5-mm QFN Package
• Energy Star Low Iq
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• APPLICATIONS
• Power Tools and Portable Equipment
• Personal Digital Assistants
• Handheld Terminals
• Industrial and Medical Equipment
• Netbooks, Mobile Internet Devices, and Ultramobile PCs

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