BQ24271 Series
1-cell, 1.5-A, I2C controlled buck battery charger with Power Path management
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
1-cell, 1.5-A, I2C controlled buck battery charger with Power Path management
| Part | Current - Charging | Operating Temperature [Max] | Operating Temperature [Min] | Package / Case | Fault Protection | Battery Pack Voltage | Charge Current - Max [Max] | Number of Cells | Mounting Type | Interface | Programmable Features | Supplier Device Package | Voltage - Supply (Max) [Max] | Battery Chemistry | Supplied Contents | Type | Primary Attributes | Function | Utilized IC / Part | Contents |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24271RGET | Constant - Programmable | 85 °C | -40 °C | 24-VFQFN Exposed Pad | Over Temperature, Over Voltage, Short Circuit | 3.7 V | 1.5 A | 1 | Surface Mount | I2C | Current | 24-VQFN (4x4) | 6 V | Lithium Ion | ||||||
Texas Instruments BQ24271YFFR | Constant - Programmable | 85 °C | -40 °C | 49-UFBGA, DSBGA | Over Temperature, Over Voltage, Short Circuit | 3.7 V | 1.5 A | 1 | Surface Mount | I2C | Current | 49-DSBGA (2.8x2.8) | 6 V | Lithium Ion | ||||||
Texas Instruments BQ24271RGER | Constant - Programmable | 85 °C | -40 °C | 24-VFQFN Exposed Pad | Over Temperature, Over Voltage, Short Circuit | 3.7 V | 1.5 A | 1 | Surface Mount | I2C | Current | 24-VQFN (4x4) | 6 V | Lithium Ion | ||||||
Texas Instruments BQ24271EVM-758 | Board(s) | Power Management | Li-Ion (1 Cell) | Battery Charger | BQ24271 | Board(s) |
Key Features
• High-Efficiency Switch Mode Charger with Separate Power Path ControlMake a GSM Call with a Deeply Discharged Battery or No BatteryInstantly Start up the System from a Deeply Discharged Battery or No BatteryHighly Integrated Battery N-Channel MOSFET Controller for Power Path Management20 V input rating, with 6.5 V Overvoltage Protection (OVP)Integrated FETs for Up to 1.5 A Charge RateSafe and Accurate Battery Management Functions0.5% Battery Regulation Accuracy10% Charge Current AccuracyCharge Parameters Programmed Using I2C InterfaceCharge Voltage, Current, Termination Threshold, Input Current Limit,VINDPMThresholdVoltage-based, NTC Monitoring InputJEITA CompatibleThermal Regulation Protection for Output Current ControlBAT Short-Circuit ProtectionSoft-Start Feature to Reduce Inrush CurrentThermal Shutdown and ProtectionAvailable in Small 2.8 mm x 2.8 mm 49-ball WCSP or4 mm × 4 mm QFN-24 PackagesHigh-Efficiency Switch Mode Charger with Separate Power Path ControlMake a GSM Call with a Deeply Discharged Battery or No BatteryInstantly Start up the System from a Deeply Discharged Battery or No BatteryHighly Integrated Battery N-Channel MOSFET Controller for Power Path Management20 V input rating, with 6.5 V Overvoltage Protection (OVP)Integrated FETs for Up to 1.5 A Charge RateSafe and Accurate Battery Management Functions0.5% Battery Regulation Accuracy10% Charge Current AccuracyCharge Parameters Programmed Using I2C InterfaceCharge Voltage, Current, Termination Threshold, Input Current Limit,VINDPMThresholdVoltage-based, NTC Monitoring InputJEITA CompatibleThermal Regulation Protection for Output Current ControlBAT Short-Circuit ProtectionSoft-Start Feature to Reduce Inrush CurrentThermal Shutdown and ProtectionAvailable in Small 2.8 mm x 2.8 mm 49-ball WCSP or4 mm × 4 mm QFN-24 Packages
Description
AI
The bq24270 and bq24271 are highly integrated single cell Li-Ion battery charger and system power path management devices targeted for space-limited, portable applications with high capacity batteries. The single cell charger has several input current limits which allow operation from either a USB port or higher power input supply (i.e. AC adapter or wireless charging input) for a versatile solution.
The power path management feature allows the bq24270 and bq24271 to power the system from a high efficiency DC to 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 allows for proper charge termination and timer operation. The system voltage is regulated to the battery voltage but will not drop below 3.5 V. This minimum system voltage support enables the system to run with a defective or absent battery pack and enables instant system turn-on even with a totally discharged battery or no battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This enables the use of a smaller adapter. The charge parameters are programmable using the I2C interface
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. Additionally, a voltage-based battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging The TS function for bq24270 and bq24271 are JEITA compatible.
The bq24270 and bq24271 are highly integrated single cell Li-Ion battery charger and system power path management devices targeted for space-limited, portable applications with high capacity batteries. The single cell charger has several input current limits which allow operation from either a USB port or higher power input supply (i.e. AC adapter or wireless charging input) for a versatile solution.
The power path management feature allows the bq24270 and bq24271 to power the system from a high efficiency DC to 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 allows for proper charge termination and timer operation. The system voltage is regulated to the battery voltage but will not drop below 3.5 V. This minimum system voltage support enables the system to run with a defective or absent battery pack and enables instant system turn-on even with a totally discharged battery or no battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This enables the use of a smaller adapter. The charge parameters are programmable using the I2C interface
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. Additionally, a voltage-based battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging The TS function for bq24270 and bq24271 are JEITA compatible.