The bq25050 is a highly integrated Li-Ion linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC Adapter and charges a single-cell Li-Ion battery with up to 1A of charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated adapters.

The bq25050 has a single power output that charges the battery. The system load is connected to OUT. The low-battery system startup circuitry maintains OUT greater than 3.4V whenever an input source is connected. This allows the system to start-up and run whenever an input source is connected regardless of the battery voltage. The charge current is programmable up to 1A using the CTRL input. Additionally, a 4.9V 50mA LDO is integrated into the IC for supplying low power external circuitry.

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.

• 30V input Rating, With 10.5V Over-Voltage Protection (OVP)
• FET Controller for External Battery FET for External Power Path Control (BGATE)
• Input Voltage Dynamic Power Management
• 50mA integrated Low Dropout Linear Regulator (LDO)
• Programmable Charge Current Through Single Input Interface (CTRL)
• 0.5% Battery Voltage Regulation Accuracy
• 7% Charge Current Regulation Accuracy
• Thermal Regulation and Protection
• Battery NTC Monitoring During Charge and Discharge
• Status Indication – Charging/Done and Temperature Faults
• Available in small 2mm × 3mm 10 Pin SON Package
• APPLICATIONS
  • Smart Phones
  • Mobile Phones
  • Portable Media Players
  • Low Power Handheld Devices

• Number of series cells
• 1
• Charge current (Max) (A)
• 1
• Operating Vin (Max) (V)
• 10.2
• Cell chemistry
• Li-Ion/Li-Polymer
• Battery charge voltage (Min) (V)
• 4.2
• Battery charge voltage (Max) (V)
• 4.2
• Absolute Vin (safety rating) (Max) ((V))
• 30
• Control interface
• Standalone (RC-Settable)
• Features
• IC thermal regulation, Input OVP, Integrated LDO, Power Path, VINDPM (Input voltage threshold to maximize adaptor power)
• Operating Vin (Min) (V)
• 4.4
• Rating
• Catalog

BQ25050的完整型号有：BQ25050DQCR、BQ25050DQCT，以下是这些产品的关键参数及官网采购报价：

BQ25050DQCR，工作温度：-40 to 85，封装：WSON (DQC)-10，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ25050DQCR的批量USD价格：.554（1000+）

BQ25050DQCT，工作温度：-40 to 85，封装：WSON (DQC)-10，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ25050DQCT的批量USD价格：.665（1000+）

BQ25050EVM — 具有 50mA LDO 的 BQ25050 1A、单输入、单节锂离子电池充电器的评估模块

bq25050EVM 可以帮助用户评估 bq25050 线性电池充电器。用户指南手册中包含 bq25050EVM 物料清单、板面布局和原理图。bq25050/60 是面向空间受限型便携式应用的高度集成锂离子线性电池充电器。它由 USB 端口或 AC 适配器供电，并为单节锂离子电池提供高达 1A 的充电电流。带输入过压保护的 30V 输入电压范围支持低成本、非稳压适配器。bq25050/60 具有为电池充电的单电源输出。系统负载与输出相连。无论何时与输入源相连，低电量系统启动电路都会将输出电压保持在 3.4V 以上。这样就可以不受电池电压的限制，在连接到输入源时启动并运行系统。充电电流可通过 (...)