MAX4374

低成本、微功耗、高边电流检测放大器 + 比较器 + 电压基准IC

简便的电流监测/保护电路,采用微小的10引脚封装


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说明

The MAX4373/MAX4374/MAX4375 low-cost, micropower, high-side current-sense supervisors contain a high-side current-sense amplifier, bandgap reference, and comparator with latching output. They feature a voltage output that eliminates the need for gain-setting resistors, making them ideal for today's notebook computers, cell phones, and other systems where battery/DC current monitoring is critical. High-side current monitoring is especially useful in battery-powered systems since it does not interfere with the ground path of the battery charger. The 0 to +28V input common-mode range is independent of the supply voltage, which ensures that the current-sense feedback remains viable even when connected to a battery pack in deep discharge.

The comparator output of the MAX4373/MAX4374/ MAX4375 is latched to provide a turn-off flag that doesn't oscillate. In addition, the MAX4374/MAX4375 contain a second comparator for use in window-detection functions. The MAX4373/MAX4374/MAX4375 are available in three different gain versions (T = +20V/V, F = +50V/V, H = +100V/V) and use an external sense resistor to set the sensitivity of the input voltage to the load current. These features offer a high level of integration, resulting in a simple and compact current-sense solution.

The MAX4373/MAX4374/MAX4375 operate from a single +2.7V to +28V supply and consume 50µA. They are specified for the extended operating temperature range (-40°C to +85°C) and are available in 8-pin and 10-pin µMAX® packages.
MAX4373、MAX4374、MAX4375:典型工作电路 MAX4373、MAX4374、MAX4375:典型工作电路 放大+

关键特性

  • Integrated Current-Sensing Solution Simplifies High-Side Current Monitoring
    • Current-Sense Amplifier plus Internal Comparator and Bandgap Reference with Improved Accuracy
      • 1mV (max) Input Offset Voltage
      • 2% (max) Full-Scale Accuracy
      • Internal Bandgap Reference (±1.6% Accuracy)
  • High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage Ensures Current Monitoring Even In Deep Discharge of Battery Pack
  • Low Power Consumption Extends Battery Life
    • 50µA Supply Current
    • Single +2.7V to +28V Operating Supply
  • Latching Comparator Output Eliminates Oscillation
  • Three Gain Versions (+20V/V, +50V/V, +100V/V) Support Different Size Battery Packs

应用

  • 蜂窝电话
  • 通用系统/板级电流监视
  • 笔记本电脑
  • 便携式电池供电系统
  • 电源管理系统
  • 精密电流源
  • 智能电池组/充电器
Part NumberOutput FormatCMVR
(V)
CMVR
(V)
VCC
(V)
VCC
(V)
ICC
(µA)
Bi-Dir. Curr. SenseVSENSE_FS
(mV)
VOS @25°C
(µV)
GainGain Accuracy @25°C
(%)
BW
(kHz)
Comp-
arators
ReferenceOper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtyprecomm.maxmax@ -3dBSee Notes
MAX4373 Voltage0282.72850No
100
150
1000
100 V/V
20 V/V
50 V/V
1.7
110
120
200
1Bandgap-40 to +85
SOIC (N)/8
UMAX/8
$1.48 @1k
MAX4374 2
SOIC (N)/14
UMAX/10
$1.13 @1k
MAX4375 2
SOIC (N)/14
UMAX/10
$1.13 @1k
查看所有Current Sense Amplifiers (51)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX4374EVKIT: MAX4374评估板

CAD Symbols and Footprints

  • MAX4374FESD
  • MAX4374FESD+
  • MAX4374FESD+T
  • MAX4374FESD-T
  • MAX4374FEUB
  • MAX4374FEUB+
  • MAX4374FEUB+T
  • MAX4374FEUB-T
  • MAX4374HESD
  • MAX4374HESD+
  • MAX4374HESD+T
  • MAX4374HESD-T
  • MAX4374HEUB
  • MAX4374HEUB+
  • MAX4374HEUB+T
  • MAX4374HEUB-T
  • MAX4374TESD
  • MAX4374TESD+
  • MAX4374TESD+T
  • MAX4374TESD-T
  • MAX4374TEUB
  • MAX4374TEUB+
  • MAX4374TEUB+T
  • MAX4374TEUB-T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    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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