MAX4210AEUA PDF资料下载(11/35 页)High-Side Power and Current Monitors

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参数资料

型号：	MAX4210AEUA
厂商：	MAXIM INTEGRATED PRODUCTS INC
元件分类：	电源管理
英文描述：	High-Side Power and Current Monitors
中文描述：	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封装：	MO-187CAA, MICRO MAX-8
文件页数：	11/35页
文件大小：	932K
代理商：	MAX4210AEUA

Detailed Description

The MAX4210/MAX4211 families of current- and power-

monitoring ICs integrate a precision current-sense

amplifier and an analog multiplier for a variety of cur-

rent and power measurements. The MAX4211 inte-

grates an additional uncommitted 1.21V reference and

two comparators with open-drain outputs. These fea-

tures enable the design of detector circuits for over-

power, overcurrent, overvoltage, or any combination of

fault conditions. The MAX4210/MAX4211 offer various

gains, packages, and configurations allowing for

greater design flexibility and lower overall cost.

These devices monitor the load current with their high-

side current-sense amplifiers and provide an analog

output voltage proportional to that current at IOUT

(MAX4211). This voltage is fed to the analog multiplier

for multiplying the load current with a source voltage to

obtain a voltage proportional to load power at POUT.

Current-Sense Amplifier

The integrated current-sense amplifier is a differential

amplifier that amplifies the voltage across RS+ and RS-.

A sense resistor, RSENSE, is connected across RS+

and RS-. A voltage drop across RSENSE is developed

when a load current is passed through it. This voltage

is amplified and is proportional to the load current. This

voltage is also fed to the analog multiplier for power-

sensing applications (see the Analog Multiplier sec-

tion). The current-sense amplifiers feature three gain

options: 16.67V/V, 25.0V/V, and 40.96V/V (see Table 1).

MAX4210/MAX4211

High-Side Power and

Current Monitors

______________________________________________________________________________________

Functional Diagrams (continued)

MAX4211A

MAX4211B

MAX4211C

IOUT

VCC

RS-

RS+

RSENSE

VSENSE

LOAD

1.21V

REFERENCE

POUT

REF

2.7V TO

5.5V

4V TO

28V

CIN1+

INHIBIT

COUT1

COUT2

CIN1-

CIN2+

CIN2-

GND

MAX4211D

MAX4211E

MAX4211F