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Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
BQ24040 ACTIVO Cargador de batería lineal independiente de 1 celda y 1 A con VBAT de 4,2 V y detección de temperatu 1A alternative with no LDO
BQ25170 ACTIVO Cargador lineal de 800 mA para baterías de iones de litio de 1 celda y LiFePO4 800mA, lower quiescent current alternative with no LDO

Detalles del producto

Number of series cells 1 Charge current (max) (A) 1 Vin (max) (V) 10.2 Cell chemistry Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 3.5 Absolute max Vin (max) (V) 30 Control topology Linear Control interface Standalone (RC-Settable) Features IC thermal regulation, Input OVP, Integrated LDO, Power Path Vin (min) (V) 3.75 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 1 Vin (max) (V) 10.2 Cell chemistry Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 3.5 Absolute max Vin (max) (V) 30 Control topology Linear Control interface Standalone (RC-Settable) Features IC thermal regulation, Input OVP, Integrated LDO, Power Path Vin (min) (V) 3.75 Rating Catalog Operating temperature range (°C) -40 to 85
WSON (DQC) 10 6 mm² 3 x 2
  • Single Cell LiFePO4 Charging Algorithm
  • 30V Input Rating, With 10.5V Over-Voltage Protection (OVP)
  • 50mA Integrated Low Dropout Linear Regulator (LDO)
  • Programmable Charge Current Through Single Input Interface (CTRL)
  • 7% Charge Current Regulation Accuracy
  • Thermal Regulation and Protection
  • Soft-Start Feature to Reduce Inrush Current
  • Battery NTC Monitoring
  • Charging Status Indication
  • Available in Small 2mm × 3mm 10 Pin SON Package
  • APPLICATIONS
    • Smart Phones
    • Mobile Phones
    • Portable Media Players
    • Low Power Handheld Devices

  • Single Cell LiFePO4 Charging Algorithm
  • 30V Input Rating, With 10.5V Over-Voltage Protection (OVP)
  • 50mA Integrated Low Dropout Linear Regulator (LDO)
  • Programmable Charge Current Through Single Input Interface (CTRL)
  • 7% Charge Current Regulation Accuracy
  • Thermal Regulation and Protection
  • Soft-Start Feature to Reduce Inrush Current
  • Battery NTC Monitoring
  • Charging Status Indication
  • Available in Small 2mm × 3mm 10 Pin SON Package
  • APPLICATIONS
    • Smart Phones
    • Mobile Phones
    • Portable Media Players
    • Low Power Handheld Devices

The bq25070 is a highly integrated LiFePO4 linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC Adapter and charges a single-cell LiFePO4 battery with up to 1A of charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated adapters.

The bq25070 has a single power output that charges the battery and powers the system. The charge current is programmable up to 1A using the CTRL input. Additionally, a 4.9V ±10% 50mA LDO is integrated into the IC for supplying low power external circuitry.

The LiFePO4 charging algorithm removes the constant voltage mode control usually present in Li-Ion battery charge cycles. Instead, the battery is fastcharged to the overcharge voltage and then allowed to relax to a lower float charge voltage threshold. The removal of the constant voltage control reduces charge time significantly. During the charge cycle, 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, and charge status display.

The bq25070 is a highly integrated LiFePO4 linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC Adapter and charges a single-cell LiFePO4 battery with up to 1A of charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated adapters.

The bq25070 has a single power output that charges the battery and powers the system. The charge current is programmable up to 1A using the CTRL input. Additionally, a 4.9V ±10% 50mA LDO is integrated into the IC for supplying low power external circuitry.

The LiFePO4 charging algorithm removes the constant voltage mode control usually present in Li-Ion battery charge cycles. Instead, the battery is fastcharged to the overcharge voltage and then allowed to relax to a lower float charge voltage threshold. The removal of the constant voltage control reduces charge time significantly. During the charge cycle, 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, and charge status display.

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Documentación técnica

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Tipo Título Fecha
* Data sheet 1A, Single-Input, Single-Cell LiFePO4, Linear Battery Charger w/ 50mA LDO datasheet 05 jul 2011
User guide 1A, Single Cell LiFePO4 Linear Battery Charger with 4.9V, 50mA LDO 29 may 2011

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

BQ25070EVM-740 — Módulo de evaluación para cargador lineal BQ25070 de 1 A y una celda para aplicaciones LiFePO4

This user’s guide describes the bq25070EVM-740 evaluation module (EVM), how to perform a stand-alone evaluation or interface with a host or system. The converter is designed to deliver up to 1 A of continuous current to the battery and/or system. The device has a 4.9 VDC, 50 mA max internal (...)

Guía del usuario: PDF
Diseños de referencia

TIDA-00053 — Diseño de referencia de cargador lineal de una sola celda de 1 A para aplicaciones LiFePO4

This reference design is designed to deliver up to 1 A of continuous current to the battery and/or system. It has a 4.9 VDC, 50 mA max internal LDO that can be used for USB applications or any other need. It uses the bq25070, a highly integrated LiFePO4 linear battery charger, in order to target (...)
Test report: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WSON (DQC) 10 Ultra Librarian

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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