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Circuitos integrados de gestión de baterías
CI para cargador de batería

BQ24050

ACTIVO

Cargador de batería lineal de iones de litio de 1 celda y 1 A con detección automática de AC/USB

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BQ24050

ACTIVO
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Detalles del producto

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 1 Features BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, USB D+/D-/BC1.2 integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.5 Vin (max) (V) 6.45 Absolute max Vin (max) (V) 30 Control topology Linear Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Control interface Standalone (RC-Settable) Operating temperature range (°C) 0 to 125
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 1 Features BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, USB D+/D-/BC1.2 integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.5 Vin (max) (V) 6.45 Absolute max Vin (max) (V) 30 Control topology Linear Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Control interface Standalone (RC-Settable) Operating temperature range (°C) 0 to 125
WSON (DSQ) 10 4 mm² (2 mm × 2 mm)
  • Charging
    • 1% Charge voltage accuracy
    • 10% Charge current accuracy
    • Pin selectable USB 100-mA and 500-mA maximum input current limit
    • Programmable termination and precharge threshold
  • 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
    • Operation over JEITA range through battery NTC - ½ fast-charge-current at cold, 4.06 V at hot
    • Fixed 10-hour safety timer
  • System
    • Auto input source detection (D+, D– pins)
      • No device transceiver required
      • USB Friendly
    • Automatic termination and timer disable mode (TTDM) for absent battery pack with thermistor
    • Status indication – charging/done
    • Available in small 2-mm × 2-mm package
  • Charging
    • 1% Charge voltage accuracy
    • 10% Charge current accuracy
    • Pin selectable USB 100-mA and 500-mA maximum input current limit
    • Programmable termination and precharge threshold
  • 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
    • Operation over JEITA range through battery NTC - ½ fast-charge-current at cold, 4.06 V at hot
    • Fixed 10-hour safety timer
  • System
    • Auto input source detection (D+, D– pins)
      • No device transceiver required
      • USB Friendly
    • Automatic termination and timer disable mode (TTDM) for absent battery pack with thermistor
    • Status indication – charging/done
    • Available in small 2-mm × 2-mm package

The BQ2405x 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 BQ2405x 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 precharge current and termination current threshold are programmed through an external resistor. The fast charge current value is also programmable through an external resistor.

The BQ2405x 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 BQ2405x 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 precharge current and termination current threshold are programmed through an external resistor. The fast charge current value is also programmable through an external resistor.
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BQ24040 ACTIVO Cargador de batería lineal independiente de 1 celda y 1 A con VBAT de 4,2 V y detección de temperatu This product is a 1A, standalone, single-cell Li-Ion battery charger in a 2x2mm package

Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos BQ2405x 1-A, Single-Cell Li-Ion and Li-Pol Battery Charger With Automatic Adaptor and USB Detection datasheet (Rev. D) PDF | HTML 26/05/2021
Nota sobre la aplicación BQ2404x, BQ2405x, and BQ2409x Frequently Asked Questions 25/02/2019
Nota sobre la aplicación Selecting the Best bq2404x/5x/9x Single Cell Battery Charger for your Applicatio 29/11/2012
Analog Design Journal Charging a three-cell nickel-based battery pack with a Li-Ion charger 26/04/2012
Analog Design Journal 2Q 2012 Issue Analog Applications Journal 26/04/2012
Analog Design Journal Li-ion battery-charger solutions for JEITA compliance 29/01/2010
EVM User's guide 0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger UG 29/09/2009

Diseño y desarrollo

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Placa de evaluación

BQ24050EVM — Módulo de evaluación de BQ24050: Cargador de batería de iones de litio de una celda y entrada única

0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger

The bq2405x series of devices are highly integrated Li-ion linear chargers devices targeted atspace-limited portable applications. The devices operate from either a USB port or AC adapter.The bq2405x has a single power output that charges the (...)

Guía del usuario: PDF
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Diseño de referencia

PMP5722 — Diseño de referencia de solución de alimentación de batería de una celda

This reference design shows the functionality and performance of a complete single-cell battery power solution using a coin-cell Li-Ion battery. It can be powered either by an external adapter or by an USB port. When the board is connected to a computer, the load current, state-of-charge, and much (...)

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