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参数资料
| 型号： | TSC101CIYLT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO5 |
| 封装： | LEAD FREE, PLASTIC, SOT-23, 5 PIN |
| 文件页数： | 6/17页 |
| 文件大小： | 298K |
| 代理商： | TSC101CIYLT |
Application information
TSC101
14/17
5
Application information
The TSC101 can be used to measure current and to feed back the information to a
microcontroller, as shown in Figure 23.
Figure 23.
Typical application schematic
The current from the supply flows to the load through the Rsense resistor causing a voltage
drop equal to Vsense across Rsense. The amplifier input currents are negligible, therefore its
inverting input voltage is equal to Vm. The amplifier's open-loop gain forces its non-inverting
input to the same voltage as the inverting input. As a consequence, the amplifier adjusts
current flowing through Rg1 so that the voltage drop across Rg1 exactly matches Vsense.
Therefore, the drop across Rg1 is:
VRg1=Vsense=Rsense.Iload
If IRg1 is the current flowing through Rg1, then IRg1 is given by the formula:
IRg1=Vsense/Rg1
The IRg1 current flows entirely into resistor Rg3 (the input bias current of the buffer is
negligible). Therefore, the voltage drop on the Rg3 resistor can be calculated as follows:
VRg3=Rg3.IRg1=(Rg3/Rg1).Vsense
Because the voltage across the Rg3 resistor is buffered to the Out pin, Vout can be
expressed as:
Vout=(Rg3/Rg1).Vsense or Vout=(Rg3/Rg1).Rsense.Iload
The resistor ratio Rg3/Rg1 is internally set to 20V/V for TSC101A, to 50V/V for TSC101B and
to 100V/V for TSC101C.
The Rsense resistor and the Rg3/Rg1 resistor ratio (equal to Av) are important parameters
because they define the full scale output range of your application. Therefore, they must be
selected carefully.
5V
Vsense
Vout
load
Iload
2.8V to 30V
Rsense
Vreg
Vp
Vm
Out
Gnd
VCC
Rg1
Rg2
Rg3
TSC101
Microcontroller
ADC
Gnd
VCC
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSC102 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:High-side current sense amplifier plus signal conditioning amplifier |
| TSC1021 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:High-side current sense amplifier |
| TSC1021AIPT | 功能描述:电流灵敏放大器 High-side current sense amplifier 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 |
| TSC1021AIYPT | 功能描述:Current Sense Amplifier 1 Circuit 8-TSSOP 制造商:stmicroelectronics 系列:汽车级，AEC-Q100 包装:剪切带（CT） 零件状态:有效 放大器类型:电流检测 电路数:1 输出类型:- 压摆率:0.45 V/μs 增益带宽积:- -3db 带宽:800kHz 电流 - 输入偏置:7μA 电压 - 输入失调:1.5mV 电流 - 电源:300μA 电流 - 输出/通道:- 电压 - 电源，单/双（±）:3.5 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 供应商器件封装:8-TSSOP 标准包装:1 |
| TSC1021BIPT | 功能描述:电流灵敏放大器 High-side current sense amplifier 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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