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参数资料
| 型号： | MAX4172EUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| -3db带宽： | 800kHz |
| 电流 - 输入偏压： | 50µA |
| 电压 - 输入偏移： | 2000µV |
| 电流 - 电源： | 800µA |
| 电流 - 输出 / 通道： | 1.75mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 32 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
5
s/div
STARTUP DELAY
GND
VOUT
500mV/div
V+
2V/div
GND
VSENSE = 100mV
MAX4172-10
10
s/div
V+ to PG POWER-UP DELAY
GND
PG
2V/div
V+
2V/div
GND
100k
PULLUP RESISTOR FROM PG TO +4V
MAX4172-11
______________________________________________________________Pin Description
MAX4172
Low-Cost, Precision, High-Side
Current-Sense Amplifier
5
Maxim Integrated
____________________________Typical Operating Characteristics (continued)
(V+ = +12V, VRS+ = 12V, ROUT = 1k, TA = +25°C, unless otherwise noted.)
Current Output. OUT is proportional to the magnitude of the sense voltage (VRS+ - VRS-). A 1k
resistor from OUT to ground will result in a voltage equal to 10V/V of sense voltage.
OUT
6
Power Good Open-Collector Logic Output. A low level indicates that V+ is sufficient to power the
MAX4172, and adequate time has passed for power-on transients to settle out.
PG
7
Supply Voltage Input for the MAX4172
V+
8
Ground
GND
5
No Connect. No internal connection. Leave open or connect to GND.
N.C.
3, 4
PIN
Load-side connection for the external sense resistor. The “-” indicates the direction of current flow.
RS-
2
Power connection to the external sense resistor. The “+” indicates the direction of current flow.
RS+
1
FUNCTION
NAME
_______________Detailed Description
The MAX4172 is a unidirectional, high-side current-sense
amplifier with an input common-mode range that is inde-
pendent of supply voltage. This feature not only allows
the monitoring of current flow into a battery in deep dis-
charge, but also enables high-side current sensing at
voltages far in excess of the supply voltage (V+).
The MAX4172 current-sense amplifier’s unique topolo-
gy simplifies current monitoring and control. The
MAX4172’s amplifier operates as shown in Figure 1.
The battery/load current flows through the external
sense resistor (RSENSE), from the RS+ node to the RS-
node. Current flows through RG1 and Q1, and into the
current mirror, where it is multiplied by a factor of 50
before appearing at OUT.
To analyze the circuit of Figure 1, assume that current
flows from RS+ to RS-, and that OUT is connected to
GND through a resistor. Since A1’s inverting input is
high impedance, no current flows though RG2 (neglect-
ing the input bias current), so A1’s negative input is
equal to VSOURCE - (ILOAD x RSENSE). A1’s open-loop
gain forces its positive input to essentially the same
voltage level as the negative input. Therefore, the drop
across RG1 equals ILOAD x RSENSE. Then, since IRG1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4172EXA | 制造商:未知厂家 制造商全称:未知厂家 功能描述:PLASTIC ENCAPSULATED DEVICES |
| MAX4173ATEUT+T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4173EVKIT+ | 功能描述:放大器 IC 开发工具 MAX4173 Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX4173FESA | 功能描述:电流灵敏放大器 V-Out High-Side Current-Sense Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX4173FESA+ | 功能描述:电流灵敏放大器 V-Out High-Side Current-Sense Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
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