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参数资料
| 型号： | LT6105HDCB#TRMPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO6 |
| 封装： | 2 X 3 MM, LEAD FREE, PLASTIC, DFN-6 |
| 文件页数： | 9/20页 |
| 文件大小： | 382K |
| 代理商： | LT6105HDCB#TRMPBF |
LT6105
17
6105fa
TYPICAL APPLICATIONS
50ms/DIV
5V/DIV
2V/DIV
10V/DIV
6105 F05
VBAT = 3.6V
ICPO = 200μA
CCPO = 2.2ΩF
Figure 5. Current Measurement Waveforms. The Top Trace Is the
MOSFET Gate with High On. The Middle Trace Is the Bottom of
the Solenoid/ Inductor. The Bottom Trace Is the LT6105 Output,
Representing Solenoid Current at 80mA / DIV. Glitches Are Useful
Indicators of Solenoid Plunger Movement
Solenoid Monitor
The large input common mode range of the LT6105
makes it suitable for monitoring currents in quarter,
half and full bridge inductive load driving applications.
Figure 4 shows an example of a quarter bridge. The
MOSFET pulls down on the bottom of the solenoid to
increase solenoid current. It lets go to decrease current,
and the solenoid voltage freewheels around the Schottky
diode. Current measurement waveforms are shown in
Figure 5. The small glitches occur due to the action of
the solenoid plunger, and this provides an opportunity for
mechanical system monitoring without an independent
sensor or limit switch.
Figure 6 shows another solenoid driver circuit, this time
with one end of the solenoid grounded and a P-channel
MOSFET pulling up on the other end. In this case, the
inductor freewheels around ground, imposing a negative
input common mode voltage of one Schottky diode drop.
This voltage may exceed the input range of the LT6105.
This does not endanger the device, but it severely degrades
its accuracy. In order to avoid violating the input range,
pull-up resistors may be used as shown.
6105 F04
LT6105
V–
V+
24V, 3W
SOLENOID
200Ω
1%
1N5818
2N7000
–IN
+IN
4.99k
1%
200Ω
1%
VOUT = 25mV/mA
VOUT
5VDC
24VDC
0V/OFF
5V/ON
–
+
1Ω
1%
6105 F06
LT6105
V–
V+
2k
1%
2k
1%
24V, 3W
SOLENOID
200Ω
1%
1N5818
TP0610L
1N914
–IN
+IN
4.99k
1%
200Ω
1%
VOUT = 25mV/mA
VOUT
5VDC
24VDC
19V/ON
24V/OFF
–
+
1Ω
1%
Figure 4. Simplest Form of a Solenoid Driver. The LT6105
Monitors the Current in Both On and Freewheel States. The
Lowest Common Mode Voltage Is 0V, While the Highest Is
24V Plus the Forward Voltage of the Schottky Diode
Figure 6. A Similar Circuit to Figure 4, but with Solenoid
Grounded, so Freewheeling Forces Inputs Negative.
Providing Resistive Pull-Ups Keeps Amplier Inputs From
Falling Outside of Their Accurate Input Range
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT6105HDCB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Precision, Extended Input Range Current Sense Amplifi er |
| LT6105HMS8#PBF | 功能描述:IC AMP R-R CURRENT SENSE 8-MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| LT6105HMS8#TRPBF | 功能描述:IC AMP R-R CURRENT SENSE 8-MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| LT6105HMS8-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Precision, Extended Input Range Current Sense Amplifi er |
| LT6105HMS8-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Precision, Extended Input Range Current Sense Amplifi er |
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