BQ24157S Series
I2C 1cell 1.25A Buck battery charger with OTG
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
I2C 1cell 1.25A Buck battery charger with OTG
| Part | Voltage - Supply (Max) [Max] | Supplier Device Package | Mounting Type | Programmable Features | Number of Cells | Battery Pack Voltage | Operating Temperature [Min] | Operating Temperature [Max] | Battery Chemistry | Package / Case | Interface | Charge Current - Max [Max] | Fault Protection | Current - Charging |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24157SYFFR | 6 V | 20-DSBGA | Surface Mount | Current | 1 | 4.44 V | -30 °C | 85 C | Lithium Ion/Polymer | 20-UFBGA, DSBGA | I2C | 1.25 A | Over Temperature, Over Voltage | Constant - Programmable |
Texas Instruments BQ24157SYFFT | 6 V | 20-DSBGA | Surface Mount | Current | 1 | 4.44 V | -30 °C | 85 C | Lithium Ion/Polymer | 20-UFBGA, DSBGA | I2C | 1.25 A | Over Temperature, Over Voltage | Constant - Programmable |
Key Features
• Integrated Power FETs for up to 1.55-A ChargeRateSpread Spectrum Frequency Control for ImprovedEMI PerformanceHigh-Accuracy Voltage and Current RegulationInput Current Regulation Accuracy:±5% (100 mA and 500 mA)Charge Voltage Regulation Accuracy:±0.5% (25°C), ±1% (0°C to 125°C)Charge Current Regulation Accuracy: ±5%Factory Test-Mode for GSM Calibration Without aBatteryInput Voltage Based Dynamic PowerManagement (VIN DPM)Bad Adaptor Detection and RejectionSafety Limit Register for Maximum ChargeVoltage and Current LimitingHigh-Efficiency Mini-USB/AC Battery Charger forSingle-Cell Li-Ion and Li-Polymer Battery Packs20-V Absolute Maximum Input Voltage Rating6.5-V Maximum Operating Input VoltageProgrammable Charge Parameters through I2CCompatible Interface (up to 3.4 Mbps):Input Current LimitVIN DPM ThresholdFast-Charge/Termination CurrentCharge Regulation Voltage (3.5 to 4.44 V)Low Charge Current Mode Enable/DisableTermination Enable/DisableSynchronous Fixed-Frequency PWM ControllerOperating at 3 MHz With 0% to 99.5% Duty CycleAutomatic High Impedance Mode for Low PowerConsumptionRobust ProtectionReverse Leakage Protection Prevents BatteryDrainageThermal Regulation and ProtectionInput/Output Overvoltage ProtectionStatus Output for Charging and FaultsUSB Friendly Boot-Up SequenceAutomatic ChargingPower Up System Without BatteryBoost Mode Operation for USB OTG:Input Voltage Range (from Battery):3.2 to 4.5 VOutput for VBUS: 5.05 V, 350 mA2.1 × 2.0-mm, 20-Pin DSBGA PackagePin-to-Pin Compatible With bq24157 and bq24158Integrated Power FETs for up to 1.55-A ChargeRateSpread Spectrum Frequency Control for ImprovedEMI PerformanceHigh-Accuracy Voltage and Current RegulationInput Current Regulation Accuracy:±5% (100 mA and 500 mA)Charge Voltage Regulation Accuracy:±0.5% (25°C), ±1% (0°C to 125°C)Charge Current Regulation Accuracy: ±5%Factory Test-Mode for GSM Calibration Without aBatteryInput Voltage Based Dynamic PowerManagement (VIN DPM)Bad Adaptor Detection and RejectionSafety Limit Register for Maximum ChargeVoltage and Current LimitingHigh-Efficiency Mini-USB/AC Battery Charger forSingle-Cell Li-Ion and Li-Polymer Battery Packs20-V Absolute Maximum Input Voltage Rating6.5-V Maximum Operating Input VoltageProgrammable Charge Parameters through I2CCompatible Interface (up to 3.4 Mbps):Input Current LimitVIN DPM ThresholdFast-Charge/Termination CurrentCharge Regulation Voltage (3.5 to 4.44 V)Low Charge Current Mode Enable/DisableTermination Enable/DisableSynchronous Fixed-Frequency PWM ControllerOperating at 3 MHz With 0% to 99.5% Duty CycleAutomatic High Impedance Mode for Low PowerConsumptionRobust ProtectionReverse Leakage Protection Prevents BatteryDrainageThermal Regulation and ProtectionInput/Output Overvoltage ProtectionStatus Output for Charging and FaultsUSB Friendly Boot-Up SequenceAutomatic ChargingPower Up System Without BatteryBoost Mode Operation for USB OTG:Input Voltage Range (from Battery):3.2 to 4.5 VOutput for VBUS: 5.05 V, 350 mA2.1 × 2.0-mm, 20-Pin DSBGA PackagePin-to-Pin Compatible With bq24157 and bq24158
Description
AI
The bq24157S is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small DSBGA package.
The IC charges the battery in three phases: conditioning, constant current, and constant voltage. The input current is automatically limited to the value set by the host.
Charge is terminated based on battery voltage and user-selectable minimum current level. During normal operation, the IC 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 can be reported to the host using the I2C interface. During the charging process, the IC monitors its junction temperature (TJ) and reduces the charge current after TJincreases to about 125°C. To support a USB OTG device, bq24157S can provide VBUS (5.05 V) by boosting the battery voltage. The IC is available in 20-pin DSBGA package.
The bq24157S is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small DSBGA package.
The IC charges the battery in three phases: conditioning, constant current, and constant voltage. The input current is automatically limited to the value set by the host.
Charge is terminated based on battery voltage and user-selectable minimum current level. During normal operation, the IC 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 can be reported to the host using the I2C interface. During the charging process, the IC monitors its junction temperature (TJ) and reduces the charge current after TJincreases to about 125°C. To support a USB OTG device, bq24157S can provide VBUS (5.05 V) by boosting the battery voltage. The IC is available in 20-pin DSBGA package.