型号BQ24090
品牌
分类电池充电器 IC
描述具有 10kΩ NTC 的单节 1A 线性锂离子电池充电器
相关操作
产品概述

参数

Number of series cells 1
Charge current (max) (A) 1
Vin (max) (V) 6.45
Cell chemistry Li-Ion/Li-Polymer
Battery charge voltage (min) (V) 4.2
Battery charge voltage (max) (V) 4.2
Absolute max Vin (max) (V) 12
Control topology Linear
Control interface Standalone (RC-Settable)
Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, VINDPM (Input voltage threshold to maximize adaptor power)
Vin (min) (V) 4.45
Rating Catalog
Operating temperature range (°C) 0 to 125

封装 | 引脚 | 尺寸

HVSSOP (DGQ) 10 14.7 mm² 3 x 4.9

特性

  • Charging
    • 1% charge voltage accuracy
    • 10% charge current accuracy
    • Pin selectable USB 100-mA and 500-mA maximum input current limit
    • Programmable termination and precharge threshold
  • Protection
    • 6.6-V overvoltage protection
    • Input voltage dynamic power management
    • 125°C thermal regulation; 150°C thermal shutdown protection
    • OUT short-circuit protection and ISET short detection
    • Operation over JEITA range via battery NTC – ½ fast-charge-current at cold, 4.06 V at hot, BQ092/3
    • Fixed 10-hour safety timer
  • System
    • Automatic Termination and Timer Disable Mode (TTDM) for absent battery pack with thermistor
    • Status indication – charging/done
    • Available in a small 10-pin MSOP package

说明

The BQ2409x series of devices are highly integrated Li-ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The BQ2409x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10-hour safety timer.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The pre-charge current and termination current threshold are programmed via an external resistor. The fast charge current value is also programmable via an external resistor.