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參數(shù)資料
| 型號： | LB1843V |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 0.8 A, PDSO20 |
| 封裝： | SSOP-20 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大小： | 99K |
| 代理商： | LB1843V |
Reference voltage (Vref)
The Vref output is linked to the input; if either IN1 or IN2 is high, the reference voltage is output.
Output current limiter
The schematic for the output current limiter is shown below.
The output set current is set according to the reference voltage VLIR applied to the LIR pin. When VLIR is applied, 1/10 of that
voltage is generated at both ends of RS in the diagram; this voltage is input on the positive (+) side of the current setting
amplifier.
The motor current IM generates voltage equal to (IM × Rf) at both ends of the external resistor Rf. This voltage is input to the
negative (–) side of the same amplifier, and the differential amplifier functions and the output transistors are driven so that these
inputs become equal.
The set current value in this instance is determined by the following equation:
Ilimit =VLIR/(10Rf) [A]
Set current detector
(1) When DEL = high
If the motor current IM has not reached the set current Ilimit, the input voltage on the negative (–) side of the amplifier is
greater than the input voltage on the positive (+) side. As a result, the drive current increases and the output PNP transistors
reach the saturation state. If this state is detected, the detection signal is sent to the set current detector, and the RD output
goes high.
If the motor current IM reaches the set current Ilimit, the output PNP transistor enters the controlled state, and the RD output
goes low.
(2) When DEL = low
Because the operation of the current setting amplifier is cancelled when a low signal is input to the DEL pin, the output PNP
transistors reach the saturation state and the RD output goes high, just as in the case described above.
The following table summarizes the states described above.
DEL
OUT
RD
H
limit
L
Non-limit (saturated)
H
L
Saturated
H
Output Current Limiter and Set Current Detector Block Diagram
Set current
detector
LB1843V
No.4385-5/6
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LB1843V_12 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Low-saturation, current-controlled bidirectional motor driver |
| LB1843V_98 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Low-saturation, current-controlled bidirectional motor driver |
| LB1843V-MPB-E | 功能描述:馬達/運動/點火控制器和驅動器 AMUSEMENT RoHS:否 制造商:STMicroelectronics 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| LB1843V-S-TRM-E | 制造商:ON Semiconductor 功能描述:H-BRIDGE MOTOR DRIVER - Tape and Reel |
| LB1843V-TLM | 制造商:SANYO Semiconductor Co Ltd 功能描述: |
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