Datasheet > MAX49925

MAX49925

更新时间： 2023-12-20 18:44:26

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
11页	1111K
描述
双向、宽正负检测范围、带PWM的电流检测放大器

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MAX49925 数据手册

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Bidirectional, Wide Positive and Negative

MAX49925

Sensing Range, Current-Sense Amplifier

with Fast PWM Rejection

General Description

Benefits and Features

The MAX49925 is a bidirectional current-sense

amplifier (CSA) with an input common-mode range

that extends from -40V to +76V, making it suitable for

48V HEV applications where there are large

automotive transients.

• Fast, 500ns PWM Edge Recovery from >500V/µs

PWM Edges

•

140dB DC CMRR Rejection

-40V to +76V Input Voltage Range

-42V to +80V Protective Immunity

300kHz, -3dB Bandwidth

On-the-fly Programmable Gain with two input pins:

10V/V, 20V/V, 50V/V, 100V/V

5μV (typ) Input Offset Voltage

±0.3% (max) Gain Error

This CSA has an extended input protection range of

-42V to +80V against reverse-battery and high-

voltage spikes. The wider input protection range also

helps relax TVS requirements, leading to lower BOM

cost and reduced component size.

•

Rail-to-Rail Output

3mm x 3mm, 10-Pin TDFN with Side-Wettable

Flanks

The MAX49925 is well-suited for phase-current

monitoring of inductive loads, such as motors and

solenoids, where pulse-width modulation (PWM) is

used to control the drive voltage and current.

•

-40°C to +125°C Temperature Range, Automotive

Grade 2

AEC-Q100 Qualified

The MAX49925 uses an improved technique to help

reject common-mode input PWM edges with slew

rates up to and beyond 500V/μs.

Ordering Information appears at end of data sheet.

The MAX49925 operates over the full -40°C to

+125°C temperature range and runs from a supply

voltage of +2.7V to +5.5V. It is available in a 3mm x

3mm, 10-pin TDFN package with side-wettable

flanks.

Applications

• PWM H-Bridge Motor In-Line/In-Phase/Winding

Current Sensing

•

Solenoid Current Sensing

Current Monitoring of Inductive Loads

Battery Stack Monitors

High-Power DC Motors

Automotive

48V Hybrid and Electric Vehicles (HEV)

19-101605; Rev 2; 7/23

12 3 4 5 6 7...11

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