BQ25822
Controlador de carga de buck bidireccional de 70 V con ruta de potencia y modo de respaldo automá
BQ25822
- Wide input voltage operating range: 4.4V to 70V
- Wide battery voltage operating range: up-to 70V with multi-chemistry support:
- 1- to 14-cell Li-ion charge profile
- 1- to 16-cell LiFePO4 charge profile
- Up-to 70V supercapacitor charging
- Synchronous buck charge controller with NFET drivers
- Adjustable fSW from 200kHz to 600kHz
- Switching frequency dithering for EMI noise reduction (DRSS)
- Optional synchronization to external clock
- Integrated loop compensation with soft start
- Optional gate driver supply input for optimized efficiency
- Bidirectional converter operation (Reverse Mode) supporting USB-PD Extended Power Range (EPR)
- Adjustable input voltage (VAC) regulation from 3.3V to 65V with 20mV/step
- Adjustable input current regulation (RAC_SNS) from 0.8A to 40A with 100mA/step using 2.5mΩ resistor
- High accuracy
- ±0.5% charge voltage regulation
- ±3% charge/input current regulation
- ±2% input voltage regulation
- I2C controlled for optimal system performance with resistor-programmable option
- Hardware adjustable input and output current limits
- Integrated 16-bit ADC for voltage, current, and temperature monitoring
- High safety integration
- Adjustable input overvoltage and undervoltage protection
- Battery overvoltage and overcurrent protection
- Charging safety timer
- Thermal shutdown
- Status outputs
- Input power present status (PG)
- Charger operation status (STAT1, STAT2)
- Package
- 36-pin 5mm × 6mm QFN
The BQ25822 is a wide input voltage, switched-mode buck Li-Ion, Li-polymer, or LiFePO4 battery charge controller with bidirectional power flow support. The device offers high-efficiency battery charging over a wide voltage range with accurate charge current and charge voltage regulation, in addition to automatic charge preconditioning, termination, and charge status indication. The device integrates all the loop compensation for the buck converter, thereby providing a high density solution with ease of use. In reverse mode, the device draws power from the battery and regulates the input terminal voltage with an added constant current loop for protection.
Besides the I2C host-controlled charging mode, the device also supports standalone charging mode via resistor programmable limits. Input current, charge current, and charge voltage regulation targets can be set via the ILIM_HIZ, ICHG, and FB pins, respectively.
Documentación técnica
| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | BQ25822: Standalone Buck and Boost Backup Supply Controller datasheet (Rev. A) | PDF | HTML | 03 oct 2025 |
| Application note | How to Implement a Standalone High-Power Supercapacitor Backup Design with BQ25822 | PDF | HTML | 13 oct 2025 |
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.
BQ25820EVM — Módulo de evaluación BQ25820
BQ25822-DESIGN — BQ25822 Datasheet
Productos y hardware compatibles
Productos
Circuitos integrados para cargadores de baterías
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| VQFN (RRV) | 36 | Ultra Librarian |
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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