BQ24251 Series
2A Single Input I2C/Standalone Switch-Mode Li-Ion Battery Charger
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
2A Single Input I2C/Standalone Switch-Mode Li-Ion Battery Charger
| Part | Battery Pack Voltage | Charge Current - Max [Max] | Package / Case | Battery Chemistry | Supplier Device Package | Voltage - Supply (Max) [Max] | Mounting Type | Number of Cells | Programmable Features | Operating Temperature [Max] | Operating Temperature [Min] | Interface | Current - Charging | Fault Protection | Function | Type | Supplied Contents | Utilized IC / Part |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24251RGER | 4.2 V | 2 A | 24-VFQFN Exposed Pad | Lithium Ion | 24-VQFN (4x4) | 10.5 V | Surface Mount | 1 | Current | 85 °C | -40 °C | I2C | Constant - Programmable | Over Current, Over Temperature, Over Voltage | ||||
Texas Instruments BQ24251EVM-150 | Battery Charger | Power Management | Board(s) | BQ24251 | ||||||||||||||
Texas Instruments BQ24251RGET | 4.2 V | 2 A | 24-VFQFN Exposed Pad | Lithium Ion | 24-VQFN (4x4) | 10.5 V | Surface Mount | 1 | Current | 85 °C | -40 °C | I2C | Constant - Programmable | Over Current, Over Temperature, Over Voltage | ||||
Texas Instruments BQ24251YFFT | 4.2 V | 2 A | 30-UFBGA, DSBGA | Lithium Ion | 30-DSBGA | 10.5 V | Surface Mount | 1 | Current | 85 °C | -40 °C | I2C | Constant - Programmable | Over Current, Over Temperature, Over Voltage | ||||
Texas Instruments BQ24251YFFR | 4.2 V | 2 A | 30-UFBGA, DSBGA | Lithium Ion | 30-DSBGA | 10.5 V | Surface Mount | 1 | Current | 85 °C | -40 °C | I2C | Constant - Programmable | Over Current, Over Temperature, Over Voltage |
Key Features
• High-Efficiency Switched-Mode Charger WithSeparate Power PathStartup System From Deeply Discharged orMissing BatteryUSB Charging CompliantSelectable Input Current Limit of 100 mA,500 mA, 900 mA, 1.5 A, and 2 ABC1.2 Compatible D+, D– DetectionIn Host Mode (After I2C Communication Startsand Before Watchdog Timer Times Out)Programmable Battery Charge Voltage,VBATREGProgrammable Charge Current (ICHG)Programmable Input Current Limit (ILIM)Programmable Input Voltage-Based DynamicPower Management Threshold, (VIN_DPM)Programmable Input Overvoltage ProtectionThreshold (VOVP)Programmable Safety TimerResistor Programmable Defaults for:ICHGup to 2 A With Current Monitoring Output(ISET)ILIMup to 2 A With Current Monitoring Output(ILIM)VIN_DPM(VDPM)Watchdog Timer Disable BitIntegrated 4.9 V, 50 mA LDOComplete System-Level ProtectionInput UVLO, Input Overvoltage Protection(OVP), Battery OVP, Sleep Mode, VIN_DPMInput Current LimitCharge Current LimitThermal RegulationThermal ShutdownVoltage-Based, JEITA Compatible NTCMonitoring InputSafety Timer22 V Absolute Maximum Input Voltage Rating10.5 V Maximum Operating Input VoltageLow RDS(on)Integrated Power FETs for a ChargingRate of up to 2 AOpen-Drain Status OutputsSynchronous Fixed-Frequency PWM ControllerOperating at 3 MHz for Small Inductor SupportAnyBoot Robust Battery Detection AlgorithmCharge Time Optimizer for Improved ChargeTimes at Any Given Charge Current2.40-mm × 2.00-mm 30-Ball DSBGA and 4-mm ×4-mm 24-Pin QFN PackagesHigh-Efficiency Switched-Mode Charger WithSeparate Power PathStartup System From Deeply Discharged orMissing BatteryUSB Charging CompliantSelectable Input Current Limit of 100 mA,500 mA, 900 mA, 1.5 A, and 2 ABC1.2 Compatible D+, D– DetectionIn Host Mode (After I2C Communication Startsand Before Watchdog Timer Times Out)Programmable Battery Charge Voltage,VBATREGProgrammable Charge Current (ICHG)Programmable Input Current Limit (ILIM)Programmable Input Voltage-Based DynamicPower Management Threshold, (VIN_DPM)Programmable Input Overvoltage ProtectionThreshold (VOVP)Programmable Safety TimerResistor Programmable Defaults for:ICHGup to 2 A With Current Monitoring Output(ISET)ILIMup to 2 A With Current Monitoring Output(ILIM)VIN_DPM(VDPM)Watchdog Timer Disable BitIntegrated 4.9 V, 50 mA LDOComplete System-Level ProtectionInput UVLO, Input Overvoltage Protection(OVP), Battery OVP, Sleep Mode, VIN_DPMInput Current LimitCharge Current LimitThermal RegulationThermal ShutdownVoltage-Based, JEITA Compatible NTCMonitoring InputSafety Timer22 V Absolute Maximum Input Voltage Rating10.5 V Maximum Operating Input VoltageLow RDS(on)Integrated Power FETs for a ChargingRate of up to 2 AOpen-Drain Status OutputsSynchronous Fixed-Frequency PWM ControllerOperating at 3 MHz for Small Inductor SupportAnyBoot Robust Battery Detection AlgorithmCharge Time Optimizer for Improved ChargeTimes at Any Given Charge Current2.40-mm × 2.00-mm 30-Ball DSBGA and 4-mm ×4-mm 24-Pin QFN Packages
Description
AI
The bq24250, bq24251, and bq24253 are highly integrated single-cell Li-Ion battery chargers and system power-path management devices targeted for space-limited, portable applications with high-capacity batteries. The single-cell charger has a single input that operates from either a USB port or an AC wall adapter for a versatile solution.
The power-path management feature allows the bq24250, bq24251, and bq24253 to power the system from a high-efficiency DC-DC converter while simultaneously and independently charging the battery. The charger monitors the battery current at all times and reduces the charge current when the system load requires current above the input current limit. This reduced charge current allows for proper charge termination and enables the system to run with a defective or absent battery pack. Additionally, this reduced charge current enables instant system turnon even with a totally discharged battery or no battery. The architecture of the power-path management also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This supplementation of current requirements enables the use of a smaller adapter.
The battery is charged in four phases: trickle charge, precharge, 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. Additionally, a voltage-based, JEITA compatible battery pack thermistor monitoring input (TS) that monitors battery temperature for safe charging is included.
The bq24250, bq24251, and bq24253 are highly integrated single-cell Li-Ion battery chargers and system power-path management devices targeted for space-limited, portable applications with high-capacity batteries. The single-cell charger has a single input that operates from either a USB port or an AC wall adapter for a versatile solution.
The power-path management feature allows the bq24250, bq24251, and bq24253 to power the system from a high-efficiency DC-DC converter while simultaneously and independently charging the battery. The charger monitors the battery current at all times and reduces the charge current when the system load requires current above the input current limit. This reduced charge current allows for proper charge termination and enables the system to run with a defective or absent battery pack. Additionally, this reduced charge current enables instant system turnon even with a totally discharged battery or no battery. The architecture of the power-path management also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This supplementation of current requirements enables the use of a smaller adapter.
The battery is charged in four phases: trickle charge, precharge, 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. Additionally, a voltage-based, JEITA compatible battery pack thermistor monitoring input (TS) that monitors battery temperature for safe charging is included.