BQ24273 Series
2.5A, Singe Input, Single Cell Switchmode Li-Ion Battery Charger with Integrated Current Sense & I2C
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
2.5A, Singe Input, Single Cell Switchmode Li-Ion Battery Charger with Integrated Current Sense & I2C
| Part | Battery Chemistry | Fault Protection | Interface | Operating Temperature [Max] | Operating Temperature [Min] | Number of Cells | Battery Pack Voltage | Voltage - Supply (Max) [Max] | Charge Current - Max [Max] | Package / Case | Mounting Type | Current - Charging | Supplier Device Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24273YFFT | Multi-Chemistry | Over Temperature, Over Voltage, Short Circuit | I2C | 85 °C | -40 °C | 1 | 4.44 V | 10 V | 2.5 A | 49-UFBGA, DSBGA | Surface Mount | Constant - Programmable | 49-DSBGA (2.8x2.8) |
Texas Instruments BQ24273YFFR | Multi-Chemistry | Over Temperature, Over Voltage, Short Circuit | I2C | 85 °C | -40 °C | 1 | 4.44 V | 10 V | 2.5 A | 49-UFBGA, DSBGA | Surface Mount | Constant - Programmable | 49-DSBGA (2.8x2.8) |
Key Features
• High-Efficiency Switch Mode Charger with Integrated Current Sense ElementSingle Input Charger20V input rating, with 10.5V Over-Voltage Protection (OVP)Integrated FETs for Up to 2.5A Charge RateIntegrated Charge Current Sense Element for Reduced BOM Count and Board Space SavingsSafe and accurate Battery Management Functions0.5% Battery Regulation Accuracy10% Charge Current AccuracyVoltage-based, NTC Monitoring Input (TS)JEITA CompatibleThermal Regulation Protection for Output Current ControlBAT Short-Circuit ProtectionSoft-Start Feature to Reduce Inrush CurrentThermal Shutdown and ProtectionAvailable in Small 49-ball WCSP or QFN-24 PackagesHigh-Efficiency Switch Mode Charger with Integrated Current Sense ElementSingle Input Charger20V input rating, with 10.5V Over-Voltage Protection (OVP)Integrated FETs for Up to 2.5A Charge RateIntegrated Charge Current Sense Element for Reduced BOM Count and Board Space SavingsSafe and accurate Battery Management Functions0.5% Battery Regulation Accuracy10% Charge Current AccuracyVoltage-based, NTC Monitoring Input (TS)JEITA CompatibleThermal Regulation Protection for Output Current ControlBAT Short-Circuit ProtectionSoft-Start Feature to Reduce Inrush CurrentThermal Shutdown and ProtectionAvailable in Small 49-ball WCSP or QFN-24 Packages
Description
AI
The bq24273 is a highly integrated single cell Li-Ion battery charger with integrated charge current sense element device targeted for space-limited, portable applications with high capacity batteries. The single cell charger operates from a dedicated power source such as a wall adapter or wireless power supply for a versatile solution. The integrated sense element eliminates the need for an external sense resistor reducing the total solution size and external component count.
The battery is charged in three phases: precharge, fast charge constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. Charge is terminated based on user-selectable minimum current level. A software watchdog provides a safety backup for I2C interface while a safety timer prevents continuously charging a damaged battery. During normal operation, bq24273 automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status is reported to the host using the I2C interface. Additionally, a voltage-based battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging. The TS function for bq24273 JEITA compatible.
The bq24273 is a highly integrated single cell Li-Ion battery charger with integrated charge current sense element device targeted for space-limited, portable applications with high capacity batteries. The single cell charger operates from a dedicated power source such as a wall adapter or wireless power supply for a versatile solution. The integrated sense element eliminates the need for an external sense resistor reducing the total solution size and external component count.
The battery is charged in three phases: precharge, fast charge constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. Charge is terminated based on user-selectable minimum current level. A software watchdog provides a safety backup for I2C interface while a safety timer prevents continuously charging a damaged battery. During normal operation, bq24273 automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status is reported to the host using the I2C interface. Additionally, a voltage-based battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging. The TS function for bq24273 JEITA compatible.