MAX4172

低成本、高精度、高边电流检测放大器

低成本、高精度电流监测,用于便携式电池供电产品


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说明

The MAX4172 is a low-cost, precision, high-side current-sense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the battery charger's ground path. Wide bandwidth and ground-sensing capability make the MAX4172 suitable for closed-loop battery-charger and general-purpose current-source applications. The 0 to 32V input common-mode range is independent of the supply voltage, which ensures that current-sense feedback remains viable, even when connected to a battery in deep discharge.

To provide a high level of flexibility, the MAX4172 functions with an external sense resistor to set the range of load current to be monitored. It has a current output that can be converted to a ground-referred voltage with a single resistor, accommodating a wide range of battery voltages and currents.

An open-collector power-good output (active-low PG) indicates when the supply voltage reaches an adequate level to guarantee proper operation of the current-sense amplifier. The MAX4172 operates with a 3.0V to 32V supply voltage, and is available in a space-saving, 8-pin µMAX® or SO package.

MAX4172:典型工作电路 MAX4172:典型工作电路 放大+

关键特性

  • Ideal for High-Side Monitoring
    • 3V to 32V Supply Operation
    • ±0.5% Typical Full-Scale Accuracy Over Temperature
    • High Accuracy +2V to +32V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
    • 800kHz Bandwidth [VSENSE = 100mV (1C)]
    • 200kHz Bandwidth [VSENSE = 6.25mV (C/16)]
  • Minimizes Board Space Requirements
    • µMAX and SO Packages

应用

  • 电池供电应用
  • 闭环电池充电器/电流源
  • 能量管理
  • 便携式PC:笔记本电脑、亚笔记本电脑、掌上电脑
  • 便携式测试/测量系统
  • 便携式/蜂窝电话
  • 智能电池组/充电器

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
产品可靠性报告: MAX4172.pdf 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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