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參數(shù)資料
| 型號(hào)： | LMD18201T |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | 3A, 55V H-Bridge |
| 中文描述： | 6 A HB BASED PRPHL DRVR WITH PWM, PZFM11 |
| 封裝： | TO-220, 11 PIN |
| 文件頁(yè)數(shù)： | 7/8頁(yè) |
| 文件大?。?/td> | 261K |
| 代理商： | LMD18201T |
Typical Applications
BASIC MOTOR DRIVER
The LMD18201 can directly interface to any Sign/Magnitude
PWM controller. The LM629 is a motion control processor
that outputs a Sign/Magnitude PWM signal to coordinate ei-
ther positional or velocity control of DC motors. The
LMD18201 provides fully protected motor driver stage.
CURRENT SENSING
In many motor control applications it is desirable to sense
and control the current through the motor. For these types of
applications a companion product, the LMD18200, is also
available. The LMD18200 is identical to the LMD18201 but
has current sensing transistors that output a current directly
proportional to the current conducted by the two upper
DMOS power devices to a separate current sense pin. This
technique does not require a low valued, power sense resis-
tor and does not subtract from the available voltage drive to
the motor.
To sense the bridge current through the LMD18201 requires
the addition of a small sense resistor between the power
ground/sense pin (Pin 7) and the actual circuit ground (see
Figure 7). This resistor should have a value of 0.1
or less to
stay within the allowable voltage compliance of the sense
pin, particularly at higher operating current levels. The volt-
age between power ground/sense (Pin 7) and the signal
ground (Pin 8) must stay within the range of 1V to +0.5V. In-
ternally there is approximately 25
between pins 7 and 8
and this resistance will slightly reduce the value of the exter-
nal sense resistor. Approximately 70% of the quiescent sup-
ply current (10 mA) flows out of pin 7. This will cause a slight
offset to the voltage across the sense resistor when the
bridge is not conducting. During reverse recovery of the in-
ternal protection diodes the voltage compliance between
pins 7 and 8 may be exceeded. The duration of these spikes
however are only approximately 100 ns and do not have
enough time or energy to disrupt the operation of the
LMD18201.
DS010793-10
FIGURE 6. Basic Motor Driver
DS010793-11
FIGURE 7. Current Sensing
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMD18201T | 制造商:Texas Instruments 功能描述:HALF BRIDGE 3A 55V 18201 SIL-11 |
| LMD18201T/NOPB | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 3A 55V H-Bridge RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| LMD18201T/NOPB | 制造商:Texas Instruments 功能描述:Motor Controller ICs |
| LMD18245 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3A, 55V DMOS Full-Bridge Motor Driver |
| LMD18245_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3A, 55V DMOS Full-Bridge Motor Driver |
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