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Circuitos integrados de gestión de baterías
Circuitos integrados para cargadores de baterías

BQ21040

ACTIVO

Cargador de baterías de iones de litio y polímero de litio de 1 celda y 0,8 A

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Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
BQ25170 ACTIVO Cargador lineal de 800 mA para baterías de iones de litio de 1 celda y LiFePO4 BQ25170 comes with lower quiescent current and flexible charge voltage.

BQ21040

ACTIVO
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Detalles del producto

Number of series cells 1 Charge current (max) (A) 0.8 Vin (max) (V) 6.45 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 30 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), Input OVP Vin (min) (V) 3.5 Rating Catalog Operating temperature range (°C) 0 to 125
Number of series cells 1 Charge current (max) (A) 0.8 Vin (max) (V) 6.45 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 30 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), Input OVP Vin (min) (V) 3.5 Rating Catalog Operating temperature range (°C) 0 to 125
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Low Battery Leakage Current (1 µA)
    • Programmable Charge Current using External Resistor up to 800 mA
    • 4.2-V Li-Ion and Li-Pol Charger
  • Protection
    • 30-V Input Rating; with 6.6-V Input Overvoltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISET Short Detection
    • Overtemperature Sensing Protection Through NTC
    • Fixed 10-Hour Safety Timer
  • System
    • Status Indication – Charging/Done
    • Available in Small SOT-23 Package
  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Low Battery Leakage Current (1 µA)
    • Programmable Charge Current using External Resistor up to 800 mA
    • 4.2-V Li-Ion and Li-Pol Charger
  • Protection
    • 30-V Input Rating; with 6.6-V Input Overvoltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISET Short Detection
    • Overtemperature Sensing Protection Through NTC
    • Fixed 10-Hour Safety Timer
  • System
    • Status Indication – Charging/Done
    • Available in Small SOT-23 Package

The bq21040 device is a highly integrated Li-Ion and Li-Pol linear battery charger device targeted at space-limited portable applications. The device operates from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq21040 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 fixed to 20% and 10%, respectively. The fast charge current value is programmable through an external resistor.

The bq21040 device is a highly integrated Li-Ion and Li-Pol linear battery charger device targeted at space-limited portable applications. The device operates from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq21040 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 fixed to 20% and 10%, respectively. The fast charge current value is programmable through an external resistor.
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Documentación técnica

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Tipo Título Fecha
* Data sheet bq21040 0.8-A, Single-Input, Single Cell Li-Ion and Li-Pol Battery Charger datasheet (Rev. D) PDF | HTML 08 ene 2019
Application note Temperature Sensing Without an Adaptor Present on the BQ21040 PDF | HTML 15 sep 2022
Application note BQ2404x, BQ2405x, and BQ2409x Frequently Asked Questions 25 feb 2019
Analog Design Journal 2Q 2016 Analog Applications Journal Issue 26 abr 2016
Analog Design Journal Battery-charging considerations for low-power applications 26 abr 2016
EVM User's guide bq21040 0.8-A Single-Input, Single-Cell Li-Ion Battery Charger EVM User's Guide 21 mar 2016

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.

Placa de evaluación

BQ21040EVM-777 — Módulo de evaluación de cargador de batería de iones de litio de una sola celda y entrada única de 0

The bq2404x series of devices are highly integrated Li-ion linear charger devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter and has a single power output that charges the battery. A system load can be placed in parallel with the (...)
Guía del usuario: PDF
No disponible en TI.com
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOT-23 (DBV) 6 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Información incluida:
  • 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
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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Soporte y capacitación

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