Texas Instruments
德州儀器 (TI) 是一家開發模擬 IC 和嵌入式處理器的全球半導體設計和製造公司。 通過聘用世界上最聰明的人才,TI 創造了塑造技術未來的創新。 今天,TI 正在幫助超過 100,000 家客户改變未來。
查看所有産品從 Texas InstrumentsThe bq24195L, bq24195 are highly-integrated switch-mode battery charge management and system power path management devices for single cell Li-Ion and Li-polymer battery in a wide range of power bank, tablet and other portable devices.
Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution.
The device supports a wide range of input sources, including standard USB host port, USB charging port and high power DC adapter. To set the default input current limit, the bq24195L, bq24195 detects the input source following the USB battery charging spec 1.2. The bq24195/bq24195L are compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. The bq24195L, bq24195 supports battery boost operation by supplying 5.1 V on PMID pin with minimum current of 1.0 A (bq24195L) or 2.1 A (bq24195).
The power path management regulates the system slightly above battery voltage but does not drop below 3.5-V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This supplement mode operation prevents overloading the input source.
The devices initiate and complete a charging cycle without software control. It automatically detects the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.
The devices provide various safety features for battery charging and system operation, including negative thermistor monitoring, charging safety timer and over-voltage/over-current protections. The thermal regulation reduces charge current when the junction temperature exceeds 120°C (programmable).
The STAT output reports the charging status and any fault conditions. The INT immediately notifies the host when a fault occurs.
The bq24195 and bq24195L areavailable in a 24-pin, 4.00 × 4.00 mm2 thin VQFN package.
類型 | 描述 | 全選 |
---|---|---|
包裝 | 卷帶(TR) | |
產品狀態 | 在售 | |
電池化學成份 | 鋰離子/聚合物 | |
電池數 | 1 | |
電流 - 充電 | 恆流 - 可編程 | |
故障保護 | 過流,超温,過壓 | |
充電電流 - 最大值 | 4.5A | |
電池組電壓 | 4.2V | |
電壓 - 供電(最高) | 17V | |
接口 | I²C | |
工作温度 | -40°C ~ 85°C(TA) | |
安裝類型 | 表面貼裝型 | |
封裝/外殼 | 24-VFQFN 裸露焊盤 | |
供應商器件封裝 | 24-VQFN(4x4) |
Texas Instruments
德州儀器 (TI) 是一家開發模擬 IC 和嵌入式處理器的全球半導體設計和製造公司。 通過聘用世界上最聰明的人才,TI 創造了塑造技術未來的創新。 今天,TI 正在幫助超過 100,000 家客户改變未來。
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