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參數(shù)資料
| 型號(hào)： | LB1843V |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Low-saturation, current-controlled bidirectional motor driver |
| 中文描述： | 低飽和，電流控制雙向電機(jī)驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 5/6頁(yè) |
| 文件大小： | 90K |
| 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 V
LIR
applied to the LIR pin. When V
LIR
is applied, 1/10 of that
voltage is generated at both ends of R
S
in the diagram; this voltage is input on the positive (+) side of the current setting
amplifier.
The motor current I
M
generates voltage equal to (I
M
×
R
f
) at both ends of the external resistor R
f
. 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:
I
limit
= V
LIR
/(10R
f
) [A]
Set current detector
(1) When DEL = high
If the motor current I
M
has not reached the set current I
limit
, 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 I
M
reaches the set current I
limit
, 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
limit
RD
L
H
H
H
Non-limit (saturated)
Saturated
L
Output Current Limiter and Set Current Detector Block Diagram
Set current
detector
LB1843V
No.4385-5/6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LB1843V_12 | 制造商:SANYO 制造商全稱(chēng):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(chēng):Sanyo Semicon Device 功能描述:Low-saturation, current-controlled bidirectional motor driver |
| LB1843V-MPB-E | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 AMUSEMENT RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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 |
| 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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