BQ24270
Cargador de batería reductor de 1 celda de 1,5 A controlado por I2C con gestión de rutas de alimenta
BQ24270
- High-Efficiency Switch Mode Charger with Separate Power Path Control
- Make a GSM Call with a Deeply Discharged Battery or No Battery
- Instantly Start up the System from a Deeply Discharged Battery or No Battery
- Highly Integrated Battery N-Channel MOSFET Controller for Power Path Management
- 20 V input rating, with 6.5 V Overvoltage Protection (OVP)
- Integrated FETs for Up to 1.5 A Charge Rate
- Safe and Accurate Battery Management Functions
- 0.5% Battery Regulation Accuracy
- 10% Charge Current Accuracy
- Charge Parameters Programmed Using I2C Interface
- Charge Voltage, Current, Termination Threshold, Input Current Limit,
VINDPM Threshold
- Charge Voltage, Current, Termination Threshold, Input Current Limit,
- Voltage-based, NTC Monitoring Input
- JEITA Compatible
- Thermal Regulation Protection for Output Current Control
- BAT Short-Circuit Protection
- Soft-Start Feature to Reduce Inrush Current
- Thermal Shutdown and Protection
- Available in Small 2.8 mm x 2.8 mm 49-ball WCSP or
4 mm × 4 mm QFN-24 Packages
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.
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Documentación técnica
Tipo | Título | Fecha | ||
---|---|---|---|---|
* | Data sheet | 1.5A, Single-Input, Single Cell Switchmode Li-Ion Battery Charger datasheet | 31 may 2012 |
Diseño y desarrollo
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
Paquete | Pasadores | Descargar |
---|---|---|
DSBGA (YFF) | 49 | Ver opciones |
VQFN (RGE) | 24 | Ver opciones |
Pedidos y calidad
- RoHS
- REACH
- Marcado del dispositivo
- Acabado de plomo/material de la bola
- Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
- Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
- Contenido del material
- Resumen de calificaciones
- Monitoreo continuo de confiabilidad
- Lugar de fabricación
- Lugar de ensamblaje
Soporte y capacitación
Foros de TI E2E™ con asistencia técnica de los ingenieros de TI
El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.
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