Soporte de software
BQ25120A
Cargador de batería lineal de 300 mA con ruta de alimentación, LDO integrado y convertidor reductor
Hoja de datos
BQ25120A
- Increases System Operation Time Between Charges
- Configurable 300-mA Buck Regulator
(1.8-V Default)
- 700 nA (typical) Iq with Buck Converter Enabled (No Load)
- Configurable Load Switch or 100mA LDO Output (Load Switch by Default)
- Up to 300-mA Charge Current for Fast Charging
- 0.5% Accurate Battery Voltage Regulation (Configurable from 3.6 V to 4.65 V in 10-mV Steps)
- Configurable Termination Current Down to
500 µA
- Simple Voltage Based Battery Monitor
- Configurable 300-mA Buck Regulator
- Highly Integrated Solution with Small Footprint
- 2.5 mm x 2.5 mm WCSP Package and 6 External Components for Minimal Solution
- Push-Button Wake-Up and Reset with Adjustable Timers
- Power Path Management for Powering the System and Charging the Battery
- Power Path Management enables <50 nA Ship Mode Battery Quiescent Current for Longest Shelf Life
- Battery Charger Operates from 3.4 V – 5.5 VIN (5.5-V OVP / 20-V Tolerant)
- Dedicated Pins for Input Current Limit, Charge Current, Termination Current, and Status Output
- I2C Communication Control
- Charge Voltage and Current
- Termination Threshold
- Input Current Limit
- VINDPM Threshold
- Timer Options
- Load Switch Control
- Controls for Interrupts for Faults and Status
- System Output Voltage Adjustment
- LDO Output Voltage Adjustment
The bq25120A is a highly integrated battery charge management IC that integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQ switcher using DCS control that extends light load efficiency down to 10-µA load currents. The low quiescent current during operation and shutdown enables maximum battery life. The device supports charge currents from 5 mA to 300 mA. The input current limit, charge current, buck converter output voltage, LDO output voltage, and other parameters are programmable through the I2C interface.
The battery is charged using a standard Li-Ion charge profile with three phases: precharge, constant current and constant voltage. A voltage-based JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature and automatically changes charge parameters to prevent the battery from charging outside of its safe temperature range. The charger is optimized for 5-V USB input, with 20-V tolerance to withstand line transients. The buck converter is run from the input or battery. When in battery only mode, the device can run from a battery up to 4.65 V.
A configurable load switch allows system optimization by disconnecting infrequently used devices. The manual reset with timer allows mutliple different configuration options for wake are reset optimization.
Documentación técnica
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Placa de evaluación
BQ25120AEVM — Módulo de evaluación de gestión de carga de baterías altamente integrado, de bajo IQ y 700 nA para d
The bq25120AEVM evaluation module is a highly integrated battery charge management IC that integrates the most common functions for wearables devices: linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The low quiescent current during operation and (...)
Guía del usuario: PDF
Diseños de referencia
PMP11311 — Diseño de referencia de alimentación para un dispositivo portátil con carga inalámbrica utilizando e
Wearable devices require advanced power management to achieve long battery run times with always-on functionality. Additionally, the devices need to use small rechargeable batteries and enable small footprint designs. This application note shows the implementation of a scalable power (...)
Diseños de referencia
TIDA-00712 — Diseño de referencia de la solución de gestión de baterías SmartWatch
This reference design is for smartwatch battery management solution (BMS). It is suitable for low-power wearable devices like smartwatch applications. The design includes an ultra-low current 1 cell Li-ion linear charger; a highly integrated Qi-compliant wireless power receiver; a (...)
Diseños de referencia
TIDA-00761 — Diseño de referencia de gestión de carga de batería de baja potencia para aplicaciones portátiles y
The TIDA-00761 is a power management solution using the bq25120 IC in a small form factor design targeted at low power wearable devices. It integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| DSBGA (YFP) | 25 | Ultra Librarian |
Pedidos y calidad
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- 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
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