MAX4377 - 单/双/四路、高边电流检测放大器，内部设定增益

MAX4377是Maxim美信半导体公司的一款放大器产品，MAX4377是单/双/四路、高边电流检测放大器，内部设定增益，本站介绍了MAX4377的封装应用图解、特点和优点、功能等，并给出了与MAX4377相关的Maxim元器件型号供参考。

MAX4377 - 单/双/四路、高边电流检测放大器，内部设定增益 - 放大器 - 业内首款SOT23高边电流检测放大器，带缓冲输出 - 美信半导体

产品概述

The MAX4376/MAX4377/MAX4378 single, dual, and quad precision high-side current-sense amplifiers are available in space-saving packages. They feature buffered voltage outputs that eliminate the need for gain-setting resistors and are ideal for today's notebook computers, cell phones, and other systems where current monitoring is critical. These precision devices are offered in three fixed-gain versions of 20, 50, and 100:GAINSUFFIX20 T 50 F100 H
For example, MAX4376TAUK is a single high-side amplifier with a gain of 20.

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 input common-mode range of 0 to +28V is independent of the supply voltage and ensures that the current-sense feedback remains viable even when connected to a battery pack in deep discharge.

The full-scale current reading can be set by choosing the appropriate voltage gain and external-sense resistor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current-sense solution.

The MAX4376/MAX4377/MAX4378 operate over a supply voltage range of +3V to +28V, draw 1mA of supply current per amplifier, and operate over the full automotive temperature range of -40°C to +125°C. These devices have a wide bandwidth of 2MHz, making them suitable for use inside battery-charger control loops. The buffered outputs drive up to 2mA of output current into a ground-referenced load.

The MAX4376 is available in a tiny 5-pin SOT23 package. The MAX4377/MAX4378 are available in space-saving 8-pin µMAX® and 14-pin TSSOP packages, respectively.

关键特性

以下关键特性由Maxim美信半导体提供：

Low-Cost Single/Dual/Quad High-Side Current-Sense Amplifiers

±0.5% Typical Full-Scale Accuracy

+3V to +28V Supply Operation

Adjustable Current-Sense Capability with External Sense Resistor

Buffered Output Voltage with 2mA Drive

1mA (typ) Supply Current

2.0MHz Bandwidth (Gain = +20V/V)

Automotive Temperature Range (-40°C to +125°C)

High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage

Three Gain Versions Available

+20V/V (MAX437_T)

+50V/V (MAX437_F)

+100V/V (MAX437_H)

Available in Space-Saving 5-pin SOT23 (Single), 8-pin µMAX (Dual), and 14-pin TSSOP (Quad)

热门应用

汽车电流检测

电池充电器

蜂窝电话

限流电源

PC电量计

通用系统/板级电流监视

笔记本电脑

PA偏置控制

便携式/电池供电系统

电源管理系统

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