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参数资料
| 型号： | ZXCT1051E5TA |
| 厂商： | Diodes Inc |
| 文件页数： | 7/10页 |
| 文件大小： | 673K |
| 描述： | IC CURRENT MONITOR 1% SOT23-5 |
| 标准包装： | 1 |
| 功能： | 电流监控器 |
| 检测方法： | 高/低端 |
| 精确度： | ±1% |
| 输入电压： | 2.7 V ~ 20 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1478 (CN2011-ZH PDF) |
| 其它名称： | ZXCT1051E5DKR |
ZXCT1051
Issue 2 - November 2006
7
www.zetex.com
?Zetex Semiconductors plc 2006
Application information
The ZXCT1051 is Zetex first current monitor with a separate power supply pin. All biasing for the
internal amplifiers comes from its separate V
CC
input and is not line powered, unlike the
ZXCT1021.
This means that at very small sense voltages the ZXCT1051 draws very little current (<1礎) from
the lines being sensed.
The separate V
CC
pin enables the ZXCT1051 to be operated at sense line voltages down to 0V,
where the ZXCT1021 would switch off. This feature enables the ZXCT1051 to be used to sense the
currents flowing through lines that have been shorted to ground and is Zetex first current
monitor to do this.
Basic operation
Load current from V
IN
is drawn through R
SENSE
developing a voltage V
SENSE
across the
ZXCT1051.
The internal amplifier forces V
SENSE
across internal resistance R
SH
causing a current to flow
through transistor Q1. This current is then converted to a voltage by R
G
. A ratio of 10:1 between
R
SH
and R
G
creates the fixed gain of 10 with an output impedance equal to R
G
(see electrical
characteristics for output current-voltage characteristics).
The gain equation of the ZXCT1051 is:
The maximum differential input voltage, V
SENSE
, is 150mV (I
L
* R
SENSE
); however voltages up to
500mV will not damage it. This can be increased further by the inclusion of a resistor, R
LIM
,
between V
SENSE
- pin and the load.
For best performance R
SENSE
should be connected as close to the V
SENSE
+ and V
SENSE
- pins thus
minimizing any series resistance with R
SENSE
.
R
SENSE
V
SENSE+
V
SENSE-
V
OUT
V
CC
V
RAIL
R
G
R
SH
Q1
GND
GND
Load
V
SENSE
I
L
R
SENSE
R
G
R
SH
---------- - 1
?/DIV>
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ZXCT1080 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:High voltage high-side current monitor |
| ZXCT1080_08 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:High voltage high-side current monitor |
| ZXCT1080E5TA | 功能描述:电流和电力监控器、调节器 60V common-mode Current Monitor RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| ZXCT1081 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:HIGH VOLTAGE HIGH-SIDE CURRENT MONITOR |
| ZXCT1081_0704 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:High voltage high-side current monitor |
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