参数资料
| 型号： | SC310CSKTRT |
| 厂商： | Semtech |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE SOT-23-6 |
| 标准包装： | 1 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| -3db带宽： | 900kHz |
| 电流 - 输入偏压： | 150µA |
| 电流 - 电源： | 270µA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 25 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 标准包装 |
| 产品目录页面： | 1359 (CN2011-ZH PDF) |
| 其它名称： | SC310CSKDKR |
8
2005 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC310
Block Diagram
Detailed Description
SC310 is a unidirectional high-side current sense ampli-
fier for precision current monitoring. It has a wide com-
mon-mode range of 2.7 to 25V and allows high-side cur-
rent-sensing at voltages greater than supply voltage (V
CC).
The SC310 operates as follows: Current from source (as
shown in the typical applications circuit on page. 1), flows
through RSENSE to the load. Since the inverting input of
amplifier A has a high input impedance, negligible cur-
rent flows through R5 (neglecting the input bias current).
Amplifier A has an inverting input voltage which equals
V(CS+) - I
LOAD*RSENSE. The amplifier’s high open-loop gain
forces the non-inverting input voltage to the same volt-
age as the inverting input. The drop across R4 equals
I
LOAD*RSENSE.
Since I
R4 flows through R4, IR4 =
(I
LOAD*RSENSE)/R4. Resistor R3 then sets the overall gain
for amplifier A, A1, A2 or A3 (neglecting the input bias
currents for non-inverting inputs for amplifiers A and B).
The second amplifier, B, is a fixed gain stage (gain = B)
and the final output includes the gain obtained from this
stage.
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The SC310 has three gain versions as follows:
VCC
+
-
+
-
R1
R2
R3
R4
R5
Q1
A
B
Gain = A1
Gain = A2
Gain = A3
Gain = B
CS-
GND
SHDN
CS+
OUT
1k
10k
20k
5k
1k
Disable
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| SC3-10RJI | 制造商:TT Electronics / Welwyn 功能描述:Res Thick Film 10 Ohm 5% 3W 制造商:TT Electronics / Welwyn 功能描述:Res Thick Film 10 Ohm 5% 3W ±100ppm/°C Molded SMD T/R |
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