BQ24040 Series
Standalone 1-cell 1-A linear battery charger with 4.2-V VBAT and Temperature Sensing
Manufacturer: Texas Instruments
Catalog(2 parts)
| Part | Current - Charging | Number of Cells▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Voltage - Supply (Max)▲▼ | Programmable Features | Charge Current - Max▲▼ | Battery Pack Voltage▲▼ | Fault Protection | Supplier Device Package | Package / Case | Mounting Type | Battery Chemistry | Function | Supplied Contents | Primary Attributes | Type | Utilized IC / Part | Embedded▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Constant - Programmable | 1 ul | 85 °C | -40 °C | 28 V | Current | 1 A | 4.199999809265137 V | Over Temperature, Over Voltage, Short Circuit | 10-WSON (2x2) | 10-WFDFN Exposed Pad | Surface Mount | Lithium Ion/Polymer | |||||||
Battery Charger | Board(s) | Li-Ion (1 Cell) | Power Management | BQ24040 |
Key Features
• Charging1% Charge voltage accuracy10% Charge current accuracyPin selectable USB 100 mA and 500 mA maximum input current limitProgrammable termination and precharge threshold, BQ24040 and BQ24045High voltage (4.35 V) chemistry support with BQ24045Protection30V Input rating; with 6.6 V or 7.1 V input overvoltage protectionInput voltage dynamic power management125°C thermal regulation; 150°C thermal shutdown protectionOUT Short-circuit protection and ISET short detectionOperation over JEITA range via battery NTC – 1/2 fast-charge-current at Cold, 4.06V at Hot, BQ24040 and BQ24045Fixed 10 hour safety timer, BQ24040 and BQ24045SystemAutomatic termination and timer disable mode (TTDM) for absent battery pack with thermistor, BQ24040 and BQ24045Status indication – charging and doneAvailable in small 2 × 2 mm2DFN-10 packageIntegrated auto start function for production line testing, BQ24041Functional Safety-Capable (BQ24040)Documentation available to aid functional safety system designSafety-Related Certifications:IEC 62368-1 CB Certification (BQ24040, BQ24045)Charging1% Charge voltage accuracy10% Charge current accuracyPin selectable USB 100 mA and 500 mA maximum input current limitProgrammable termination and precharge threshold, BQ24040 and BQ24045High voltage (4.35 V) chemistry support with BQ24045Protection30V Input rating; with 6.6 V or 7.1 V input overvoltage protectionInput voltage dynamic power management125°C thermal regulation; 150°C thermal shutdown protectionOUT Short-circuit protection and ISET short detectionOperation over JEITA range via battery NTC – 1/2 fast-charge-current at Cold, 4.06V at Hot, BQ24040 and BQ24045Fixed 10 hour safety timer, BQ24040 and BQ24045SystemAutomatic termination and timer disable mode (TTDM) for absent battery pack with thermistor, BQ24040 and BQ24045Status indication – charging and doneAvailable in small 2 × 2 mm2DFN-10 packageIntegrated auto start function for production line testing, BQ24041Functional Safety-Capable (BQ24040)Documentation available to aid functional safety system designSafety-Related Certifications:IEC 62368-1 CB Certification (BQ24040, BQ24045)
Description
AI
The BQ2404x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.
The BQ2404x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.
The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.
The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The pre-charge current and termination current threshold are programmed through an external resistor on the BQ24040 and BQ24045. The fast charge current value is also programmable through an external resistor.
The BQ2404x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.
The BQ2404x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.
The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.
The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The pre-charge current and termination current threshold are programmed through an external resistor on the BQ24040 and BQ24045. The fast charge current value is also programmable through an external resistor.