Product details

Function Charger Front-End Protection Number of series cells (min) 1 Number of series cells (max) 1 Features LDO output, Overcurrent protection, Overvoltage, Short-circuit Discharge (SCD) Operating current (typ) (µA) 300 Rating Catalog Vin (max) (V) 30 Overvoltage protection 5 Operating temperature range (°C) -40 to 125 Battery overvoltage protection (min) (V) 4.35 Battery overvoltage protection (max) (V) 4.35
Function Charger Front-End Protection Number of series cells (min) 1 Number of series cells (max) 1 Features LDO output, Overcurrent protection, Overvoltage, Short-circuit Discharge (SCD) Operating current (typ) (µA) 300 Rating Catalog Vin (max) (V) 30 Overvoltage protection 5 Operating temperature range (°C) -40 to 125 Battery overvoltage protection (min) (V) 4.35 Battery overvoltage protection (max) (V) 4.35
WSON (DSG) 8 4 mm² 2 x 2
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet bq2438x Overvoltage and Overcurrent Protection IC and Li+ Charger Front-End Protection IC With LDO Mode datasheet (Rev. C) PDF | HTML 28 Aug 2015
EVM User's guide bq2430x/1x DSG EVM (HPA245) for Li+ Charger Front End Protection IC (Rev. B) 04 Nov 2016

Design & development

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Evaluation board

BQ24381EVM — BQ24381 Evaluation Module

The bq2430x/1x/8x evaluation module is a complete charger module for evaluating a charger front-end protection and charger solution using the bq2430x/1x/8x and bq24080 devices. This user’s guide presents test summary information, printed-circuit board layout guidelines, bill of materials, (...)

User guide: PDF
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WSON (DSG) 8 Ultra Librarian

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