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BQ24725A 正在供貨 具有 N 溝道功率 MOSFET 選擇器的 SMBus 1 至 4 節(jié)降壓電池充電控制器 This is a lower quiescent current alternative.

產(chǎn)品詳情

Rating Catalog Number of series cells 1, 2, 3, 4 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 8 Features Input OVP, Power Path Vin (min) (V) 4.5 Vin (max) (V) 24 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 19.2 Control interface SMBus Operating temperature range (°C) -40 to 85
Rating Catalog Number of series cells 1, 2, 3, 4 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 8 Features Input OVP, Power Path Vin (min) (V) 4.5 Vin (max) (V) 24 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 19.2 Control interface SMBus Operating temperature range (°C) -40 to 85
VQFN (RGR) 20 12.25 mm2 3.5 x 3.5
  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615 kHz, 750 kHz, and 885 kHz Switching
    Frequency
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • Enhanced Safety Features for Overvoltage
    Protection, Overcurrent Protection, Battery,
    Inductor, and MOSFET Short-Circuit Protection
  • Programmable Input Current, Charge Voltage,
    Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2 V
    • ±3% Charge Current Accuracy up to 8.128 A
    • ±3% Input Current Accuracy up to 8.064 A
    • ±2% 20× Adapter Current or Charge Current
      Output Accuracy
  • Programmable Adapter Detection and Indicator
  • Independent Comparator With Internal Reference
  • Integrated Soft-Start
  • Integrated Loop Compensation
  • AC Adapter Operating Range 5 V to 24 V
  • 15-μA Off-State Battery Discharge Current
  • 20-pin 3.5 mm × 3.5 mm QFN Package
  • bq24707: ACOK Delay Default 1.3 s
  • bq24707A: ACOK Delay Default 1.2 ms
  • APPLICATIONS
    • Portable Notebook Computers, UMPCs, Ultra-Thin
      Notebooks, and Netbooks
    • Personal Digital Assistants
    • Handheld Terminals
    • Industrial and Medical Equipment
    • Portable Equipment

All other trademarks are the property of their respective owners
  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615 kHz, 750 kHz, and 885 kHz Switching
    Frequency
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • Enhanced Safety Features for Overvoltage
    Protection, Overcurrent Protection, Battery,
    Inductor, and MOSFET Short-Circuit Protection
  • Programmable Input Current, Charge Voltage,
    Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2 V
    • ±3% Charge Current Accuracy up to 8.128 A
    • ±3% Input Current Accuracy up to 8.064 A
    • ±2% 20× Adapter Current or Charge Current
      Output Accuracy
  • Programmable Adapter Detection and Indicator
  • Independent Comparator With Internal Reference
  • Integrated Soft-Start
  • Integrated Loop Compensation
  • AC Adapter Operating Range 5 V to 24 V
  • 15-μA Off-State Battery Discharge Current
  • 20-pin 3.5 mm × 3.5 mm QFN Package
  • bq24707: ACOK Delay Default 1.3 s
  • bq24707A: ACOK Delay Default 1.2 ms
  • APPLICATIONS
    • Portable Notebook Computers, UMPCs, Ultra-Thin
      Notebooks, and Netbooks
    • Personal Digital Assistants
    • Handheld Terminals
    • Industrial and Medical Equipment
    • Portable Equipment

All other trademarks are the property of their respective owners

The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, multi-chemistry battery charging applications.

SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.

The IC uses the internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage.

The IC charges one-, two-, three-, or four-series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm QFN package.

The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, multi-chemistry battery charging applications.

SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.

The IC uses the internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage.

The IC charges one-, two-, three-, or four-series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm QFN package.
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頂層文檔 類型 標(biāo)題 格式選項(xiàng) 下載最新的英語(yǔ)版本 日期
* 數(shù)據(jù)表 bq24707x 1-4 Cell Li+ Battery SMBus Charge Controller With Independent Comparator and Advanced Circuit Protection 數(shù)據(jù)表 (Rev. C) PDF | HTML 2015年 7月 31日
應(yīng)用手冊(cè) Autonomous Smart Battery Guide PDF | HTML 2021年 10月 15日
應(yīng)用手冊(cè) How to Review a Multicell Switching Charger Schematic 2011年 9月 21日

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計(jì)算工具

SLUC203 — bq24725_725A_726_707_73x Calculation Tool

支持的產(chǎn)品和硬件

支持的產(chǎn)品和硬件
參考設(shè)計(jì)

TIDA-00038 — 多節(jié)同步開關(guān)模式的參考設(shè)計(jì)

該參考設(shè)計(jì)是一套完整的充電器模塊，可使用 bq24707 器件對(duì)多節(jié)（1 到 4 節(jié)）同步筆記本電腦充電器進(jìn)行評(píng)估。它設(shè)計(jì)用于為鋰離子或鋰聚合物應(yīng)用提供高達(dá) 4A 的充電電流。該充電電流可由 SMBus 接口通過 EV2300 接口板編程。該參考設(shè)計(jì)未隨附 EV2300 接口板，因此必須單獨(dú)訂購(gòu)。該設(shè)計(jì)中包括高效率的同步電池充電器，組件數(shù)量非常少，適用于空間有限的多化學(xué)物電池充電應(yīng)用?？赏ㄟ^ SMBus 接口對(duì)充電電壓、充電電流、輸入電流和靈活充電選項(xiàng)進(jìn)行編程。
測(cè)試報(bào)告: PDF
原理圖: PDF
封裝 引腳 CAD 符號(hào)、封裝和 3D 模型
VQFN (RGR) 20 Ultra Librarian

訂購(gòu)和質(zhì)量

包含信息：
  • RoHS
  • REACH
  • 器件標(biāo)識(shí)
  • 引腳鍍層/焊球材料
  • MSL 等級(jí)/回流焊峰值溫度
  • MTBF/時(shí)基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續(xù)可靠性監(jiān)測(cè)
包含信息：
  • 制造廠地點(diǎn)
  • 封裝廠地點(diǎn)

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