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電池管理 IC
電池充電器 IC

BQ24078

現行

獨立式 1 芯 1.5-A 線性電池充電器、電源路徑和 4.35-V VBAT

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
BQ25185 現行 具電源路徑和太陽能輸入支援的 1 芯 1A 獨立線性電池充電器 BQ25185 comes with wider Vin, higher battery discharge and solar input support.
功能與所比較的裝置相似
BQ25180 現行 採用 WCSP 封裝且具有穩壓電源路徑的 1-A 鋰離子和 LiFePO4 I²C 可編程線性充電器 This product is 1-A Li-ion and LiFePO4 I²C programmable linear charger with regulated power path in a WCSP package

BQ24078

現行
產品規格表 立即訂購

產品詳細資料

Number of series cells 1 Charge current (max) (A) 1.5 Vin (max) (V) 6.4 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.35 Battery charge voltage (max) (V) 4.35 Absolute max Vin (max) (V) 28 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.35 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 1.5 Vin (max) (V) 6.4 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.35 Battery charge voltage (max) (V) 4.35 Absolute max Vin (max) (V) 28 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.35 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RGT) 16 9 mm² 3 x 3
  • Fully Compliant USB Charger
    • Selectable 100-mA and 500-mA Maximum Input Current
    • 100-mA Maximum Current Limit Ensures Compliance to USB-IF Standard
    • Input-Based Dynamic Power Management (VIN-DPM) for Protection Against Poor USB Sources
  • 28-V Input Rating with Overvoltage Protection
  • Integrated Dynamic Power Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the Battery
  • Supports up to 1.5-A Charge Current with Current Monitoring Output (ISET)
  • Programmable Input Current Limit up to 1.5 A for Wall Adapters
  • System Output Tracks Battery Voltage
  • Battery Disconnect Function with SYSOFF Input
  • Programmable Pre-Charge and Fast-Charge Safety Timers
  • Reverse Current, Short-Circuit, and Thermal Protection
  • NTC Thermistor Input
  • Proprietary Start-up Sequence Limits Inrush Current
  • Battery Charge Voltage, VBAT:
    • bq24076 - 4.4 V (typ)
    • bq24078 - 4.35 V (typ)
  • Status Indication – Charging/Done, Power Good
  • Fully Compliant USB Charger
    • Selectable 100-mA and 500-mA Maximum Input Current
    • 100-mA Maximum Current Limit Ensures Compliance to USB-IF Standard
    • Input-Based Dynamic Power Management (VIN-DPM) for Protection Against Poor USB Sources
  • 28-V Input Rating with Overvoltage Protection
  • Integrated Dynamic Power Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the Battery
  • Supports up to 1.5-A Charge Current with Current Monitoring Output (ISET)
  • Programmable Input Current Limit up to 1.5 A for Wall Adapters
  • System Output Tracks Battery Voltage
  • Battery Disconnect Function with SYSOFF Input
  • Programmable Pre-Charge and Fast-Charge Safety Timers
  • Reverse Current, Short-Circuit, and Thermal Protection
  • NTC Thermistor Input
  • Proprietary Start-up Sequence Limits Inrush Current
  • Battery Charge Voltage, VBAT:
    • bq24076 - 4.4 V (typ)
    • bq24078 - 4.35 V (typ)
  • Status Indication – Charging/Done, Power Good

The bq2407x is a family of integrated Li-Ion battery linear chargers with system power path management functionality targeted at space-constrained portable applications. The devices operate from either a USB port or an AC adapter and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the bq2407x to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents system crashes because of incorrectly configured USB sources and maximizes the power available from the adapter.

The bq2407x features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination and enables the system to run with a defective or absent battery pack.

Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged battery. The power-path management architecture also lets the battery supplement the system current requirements when the adapter cannot deliver the peak system currents, thus enabling the use of a smaller adapter.

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 the 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 input current limit and charge current are programmable using external resistors.

The bq2407x is a family of integrated Li-Ion battery linear chargers with system power path management functionality targeted at space-constrained portable applications. The devices operate from either a USB port or an AC adapter and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the bq2407x to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents system crashes because of incorrectly configured USB sources and maximizes the power available from the adapter.

The bq2407x features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination and enables the system to run with a defective or absent battery pack.

Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged battery. The power-path management architecture also lets the battery supplement the system current requirements when the adapter cannot deliver the peak system currents, thus enabling the use of a smaller adapter.

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 the 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 input current limit and charge current are programmable using external resistors.
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類型 標題 日期
* Data sheet bq2407x 1.5-A High Battery Voltage Li-Ion Battery Chargers with Power-Path Management IC datasheet (Rev. A) PDF | HTML 2017年 12月 14日
User guide Achieving Ship Mode With the BQ24075, BQ24076, BQ24078, and BQ24079 PDF | HTML 2021年 11月 5日
Application note Configuring Standalone Linear Power Path Chargers (Rev. A) PDF | HTML 2020年 4月 6日
Application note Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) 2018年 5月 1日
EVM User's guide bq24076, bq24078 1.5-A Single-Chip Li-Ion and Li-Polymer CM IC EVM 2017年 10月 9日
Application note Selecting the Best bq2407x/23x Single Cell Battery Charger for your Application 2012年 11月 8日

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BQ24078EVM-015 — bq24078 1.5A 單晶片鋰離子和鋰聚合物電池充電器管理 IC 評估模組

The bq24078 evaluation module (EVM) provides a convenient method for evaluating the performance of a charge management and system power solution for portable applications using the bq24076/8 product. The charger is designed to deliver up to 1.5 A of continuous current to the system or charger for (...)
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