BQ24257 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 | Current - Charging | Supplier Device Package | Mounting Type | Battery Chemistry | Interface | Package / Case | Battery Pack Voltage | Operating Temperature [Max] | Operating Temperature [Min] | Programmable Features | Charge Current - Max [Max] | Number of Cells | Voltage - Supply (Max) [Max] | Fault Protection |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24257YFFT | Constant - Programmable | 30-DSBGA | Surface Mount | Multi-Chemistry | I2C, USB | 30-UFBGA, DSBGA | 4.44 V | 85 °C | -40 °C | Timer | 2 A | 1 | 6.5 V | Over Temperature, Over Voltage |
Texas Instruments BQ24257RGET | Constant - Programmable | 24-VQFN (4x4) | Surface Mount | Multi-Chemistry | I2C, USB | 24-VFQFN Exposed Pad | 4.44 V | 85 °C | -40 °C | Timer | 2 A | 1 | 6.5 V | Over Temperature, Over Voltage |
Key Features
• High-efficiency Switch-mode Charger with Integrated Current Sense ResistorBC1.2 D+, D– Detection with Dead Battery Provision (DBP) Pin-to-Sync with External USB-PHIUSB Charging CompliantSelectable Input Current Limit of 100 mA,150 mA, 500 mA, 900 mA. 1.5 A, and 2 AWatchdog Timer with 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 Regulation and Thermal ShutdownVoltage Based, JEITA Compatible NTC Monitoring InputSafety TimerIn Host Mode, Programmable VBATREG, ICHG, ILIM, VIN_DPM, VOVPand safety timer in host mode (after I2C Communication and Before Watchdog Timer Times Out)In Standalone Mode, Resistor Programmable ICHG, ILIM, and VIN_DPMin Standalone Mode (before I2C Communication and After Watchdog Timer Times Out)20-V Maximum Input Voltage Rating10.5-V Maximum Operating Input VoltageLow RDS(on)Integrated Sense Resistor for up to 2-A Charging RateOpen Drain Status OutputsSynchronous Fixed-frequency PWM Controller Operating at 3 MHz for Small Inductor SupportRobust Battery Detection AlgorithmCharge Time Optimizer for Improved Charge Times at any Given Charge CurrentHigh-efficiency Switch-mode Charger with Integrated Current Sense ResistorBC1.2 D+, D– Detection with Dead Battery Provision (DBP) Pin-to-Sync with External USB-PHIUSB Charging CompliantSelectable Input Current Limit of 100 mA,150 mA, 500 mA, 900 mA. 1.5 A, and 2 AWatchdog Timer with 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 Regulation and Thermal ShutdownVoltage Based, JEITA Compatible NTC Monitoring InputSafety TimerIn Host Mode, Programmable VBATREG, ICHG, ILIM, VIN_DPM, VOVPand safety timer in host mode (after I2C Communication and Before Watchdog Timer Times Out)In Standalone Mode, Resistor Programmable ICHG, ILIM, and VIN_DPMin Standalone Mode (before I2C Communication and After Watchdog Timer Times Out)20-V Maximum Input Voltage Rating10.5-V Maximum Operating Input VoltageLow RDS(on)Integrated Sense Resistor for up to 2-A Charging RateOpen Drain Status OutputsSynchronous Fixed-frequency PWM Controller Operating at 3 MHz for Small Inductor SupportRobust Battery Detection AlgorithmCharge Time Optimizer for Improved Charge Times at any Given Charge Current
Description
AI
The bq2425x is a highly integrated single-cell Li-Ion battery charger with integrated current sense resistor 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 AC wall adapter for a versatile solution. BC1.2 compatible D+, D- detection allows for recognition of CDP, DCP, SDP, and non-standard USB adapters. The use of an accessory dead battery provision (DBP) pin allows for the system to sync a dead battery state in order to enable or disable the BC1.2 detection in the event of an external USB-PHI.
The bq24257 has two modes of operation: 1) I2C mode, and 2) Standalone mode. In I2C mode, the host can adjust the charge parameters and monitor the status of the charger operation. In Standalone mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The bq24257 enters host mode while the I2C registers are accessed and the watchdog timer has not expired (if enabled).
All trademarks are the property of their respective owners.
The bq24258 has only one mode of operation which is the Standalone. In this mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The EN1, EN2, and EN3 pin are available in the bq24258 spin to support USB 3.0 compliance.
The battery is charged in four phases: trickle charge, pre-charge, constant current and constant voltage. In all charge phases, an internal control loop monitors the device 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) is included that monitors battery temperature for safe charging.
The bq2425x is a highly integrated single-cell Li-Ion battery charger with integrated current sense resistor 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 AC wall adapter for a versatile solution. BC1.2 compatible D+, D- detection allows for recognition of CDP, DCP, SDP, and non-standard USB adapters. The use of an accessory dead battery provision (DBP) pin allows for the system to sync a dead battery state in order to enable or disable the BC1.2 detection in the event of an external USB-PHI.
The bq24257 has two modes of operation: 1) I2C mode, and 2) Standalone mode. In I2C mode, the host can adjust the charge parameters and monitor the status of the charger operation. In Standalone mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The bq24257 enters host mode while the I2C registers are accessed and the watchdog timer has not expired (if enabled).
All trademarks are the property of their respective owners.
The bq24258 has only one mode of operation which is the Standalone. In this mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The EN1, EN2, and EN3 pin are available in the bq24258 spin to support USB 3.0 compliance.
The battery is charged in four phases: trickle charge, pre-charge, constant current and constant voltage. In all charge phases, an internal control loop monitors the device 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) is included that monitors battery temperature for safe charging.