BQ24618 - 独立 USB 供能的同步开关模式锂离子或锂聚合物电池充电器

BQ24618是TI德州仪器公司的一款电池充电器IC产品，BQ24618是独立 USB 供能的同步开关模式锂离子或锂聚合物电池充电器，本站介绍了BQ24618的封装应用图解、特点和优点、功能等，并给出了与BQ24618相关的TI元器件型号供参考。

BQ24618 - 独立 USB 供能的同步开关模式锂离子或锂聚合物电池充电器 - 电池充电器IC - 电池管理产品 - 德州仪器

产品特性

USB-Friendly 4.7-V to 28-V Input Operating Range
Stand-Alone Charge Controller to Support 1 to 6 Li-Ion or Li-Polymer Battery Cells
Up to 10-A Charge Current and Adapter Current
600-kHz NMOS-NMOS Synchronous Buck Converter
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
Safety Protection
- Input Overvoltage Protection
- Battery Thermistor Sense Hot/Cold Charge Suspend
- 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 99.5% Maximum Effective Duty Cycle
Energy Star Low Quiescent Current Iq
- < 15-µA Off-State Battery Discharge Current
- < 1.5-mA Off-State Input Quiescent Current

产品应用

Tablet PCs
Smart Phones
Portable Media Players, Navigation Devices, Notebooks and Ultra-Mobile PCs
Personal Digital Assistants
Handheld Terminals
Industrial and Medical Equipment

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
bq24618	VQFN (24)	4.00 mm × 4.00 mm

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