BQ24618中文资料支持 USB 且具有 5V 至 28V 输入的独立 1 至 6 节降压电池充电控制器数据手册TI规格书

描述 Description

The bq24618 device is highly integrated Li-ion or Li-polymer switched-mode battery-charge controller. The bq24618 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 bq24618 operates from either a USB port or AC adapter and supports charge currents up to 10 A. The device 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 for charge termination. The bq24618 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

• USB-Friendly 4.7-V to 28-V Input Operating Range
• Up to 10-A Charge Current and Adapter Current
• High-Accuracy Voltage and Current Regulation
• ±3% Charge Current Accuracy
• Integration
• Internal Loop Compensation
• Dynamic Power Management
• Safety Protection
• Battery Thermistor Sense Hot/Cold Charge Suspend
• Reverse-Protection Input FET
• Charge Overcurrent Protection
• Battery Overvoltage Protection
• Status Outputs
• Charger Operation Status
• Charge Enable Pin
• 30-ns Driver Dead-Time and 99.5% Maximum Effective Duty Cycle
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• Tablet PCs
• Portable Media Players, Navigation Devices, Notebooks and Ultra-Mobile PCs
• Handheld Terminals
• Industrial and Medical Equipment

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