The bq2438x family of devices are charger front-end integrated circuits (ICs) designed to provide protection to Li-ion batteries from failures of the charging circuit. The device continuously monitors the input voltage and battery voltage. The device operates like a linear regulator, maintaining a 5.5-V (bq24380) or 5-V (bq24381, bq24382) output with input voltages up to the Input overvoltage threshold. During input overvoltage conditions, the device immediately turns off the internal pass FET disconnecting the charging circuit from the damaging input source. Additionally, if the battery voltage rises to unsafe levels while charging, power is removed from the system. The device checks for short-circuit or overload conditions at its output when turning the pass FET on, and if it finds unsafe conditions, it switches off and then rechecks the conditions. Additionally, the device also monitors its die temperature and switches off if it exceeds 140°C.

When the device is controlled by a processor, the device provides status information about fault conditions to the host.

• Input Overvoltage Protection
• Accurate Battery Overvoltage Protection
• Output Short-Circuit Protection
• Soft-Start to Prevent Inrush Currents
• Soft-Stop to Prevent Voltage Spikes
• Maximum Input Voltage of 30 V
• Supports up to 1.7-A Load Current
• Thermal Shutdown
• Enable Function
• Fault Status Indication
• Small 2 mm × 2 mm 8-Pin WSON Package

• Function
• Charger Front-End Protection
• Number of series cells (Min)
• 1
• Number of series cells (Max)
• 1
• Features
• Overvoltage, Overcurrent protection, Short-circuit Discharge (SCD)
• Typical operating current (Typ) (uA)
• 300
• Rating
• Catalog
• Vin (Max) (V)
• 30

BQ24381的完整型号有：BQ24381DSGR、BQ24381DSGT，以下是这些产品的关键参数及官网采购报价：

BQ24381DSGR，工作温度：-40 to 125，封装：WSON (DSG)-8，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：NIPDAUAG，TI官网BQ24381DSGR的批量USD价格：0.231（1000+）

BQ24381DSGT，工作温度：-40 to 125，封装：WSON (DSG)-8，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：NIPDAUAG，TI官网BQ24381DSGT的批量USD价格：0.277（1000+）

BQ24381EVM — BQ24381 评估模块

bq2430x/1x/8x 评估模块是一个完整的充电器模块，用于评估充电器前端保护和使用 bq2430x/1x/8x 和 bq24080 器件的充电器解决方案。本用户指南提供了测试概要信息、印制电路板布局指南、物料清单、板面布局和原理图。