BQ24079 - USB 供能的 1.2A 锂离子电池充电器和具有 4.1 VBAT 的电源路径管理 IC

BQ24079是TI德州仪器公司的一款电池充电器IC产品，BQ24079是USB 供能的 1.2A 锂离子电池充电器和具有 4.1 VBAT 的电源路径管理 IC，本站介绍了BQ24079的封装应用图解、特点和优点、功能等，并给出了与BQ24079相关的TI元器件型号供参考。

BQ24079 - USB 供能的 1.2A 锂离子电池充电器和具有 4.1 VBAT 的电源路径管理 IC - 电池充电器IC - 电池管理产品 - 德州仪器

产品特性

Fully Compliant USB Charger
- Selectable 100-mA and 500-mA Maximum Input Current
- 100-mA Maximum Current Limit Ensures Compliance to USB-IF Standard
- Input-Based Dynamic Power Management (VIN-DPM) for Protection Against Poor USB Sources
28-V Input Rating with Overvoltage Protection
Integrated Dynamic Power Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the Battery
Supports up to 1.5-A Charge Current with Current Monitoring Output (ISET)
Programmable Input Current Limit up to 1.5 A for Wall Adapters
System Output Tracks Battery Voltage (bq24072)
Programmable Termination Current (bq24074)
Battery Disconnect Function with SYSOFF Input (bq24075, bq24079)
Programmable Pre-Charge and Fast-Charge Safety Timers
Reverse Current, Short-Circuit and Thermal Protection
NTC Thermistor Input
Proprietary Start-up Sequence Limits Inrush Current
Status Indication – Charging/Done, Power Good

Typical Application Circuit

产品应用

Smart Phones
Portable Media Players
Portable Navigation Devices
Low-Power Handheld Devices

产品说明

The bq2407x series of devices are integrated Li-Ion linear chargers and system power path management devices targeted at space-limited portable applications. The devices operate from either a USB port or an AC adapter and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the bq2407x to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing incorrectly configured USB sources.

The bq2407x features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination and enables the system to run with a defective or absent battery pack.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
bq24072	VSON (16)	3.00 mm × 3.00 mm
bq24073
bq24074
bq24075
bq24079

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