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參數(shù)資料
| 型號(hào)： | tle 4727 |
| 廠商： | SIEMENS AG |
| 英文描述： | 3-Phase Stepper-Motor Driver(兩相步進(jìn)式馬達(dá)驅(qū)動(dòng)器) |
| 中文描述： | 三相步進(jìn)電機(jī)驅(qū)動(dòng)器（兩相步進(jìn)式馬達(dá)驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 20/22頁 |
| 文件大?。?/td> | 209K |
| 代理商： | TLE 4727 |
TLE 4727
Semiconductor Group
20
1998-12-16
Application Hints
The TLE 4727 is intended to drive both phases of a stepper motor. Special care has
been taken to provide high efficiency, robustness and to minimize external components.
Power Supply
The TLE 4727 will work with supply voltages ranging from 5 V to 16 V at pin
V
S
. Surges
exceeding 16 V at
V
S
won’t harm the circuit up to 45 V, but whole function is not
guaranteed. As soon as the voltage drops below approximately 16 V the TLE 4727 works
promptly again.
As the circuit operates with chopper regulation of the current, interference generation
problems can arise in some applications. Therefore the power supply should be
decoupled by a 0.1
μ
F ceramic capacitor located near the package. Unstabilized
supplies may even afford higher capacities.
Current Sensing
The current in the windings of the stepper motor is sensed by the voltage drop across
R
sense
. Depending on the selected current internal comparators will turn off the sink
transistor as soon as the voltage drop reaches certain thresholds (typical 0 V, 0.07 V,
0.50 V and 0.70 V). These thresholds are not affected by variations of
V
S
. Consequently
unstabilized supplies will not affect the performance of the regulation. For precise current
level it must be considered, that internal bonding wire (typ. 60 m
) is a part of
R
sense
.
Due to chopper control fast current rises (up to 10A/
μ
s) will occur at the sensing
resistors. To prevent malfunction of the current sensing mechanism
R
sense
should be
pure ohmic. The resistors should be wired to GND as directly as possible. Capacitive
loads such as long cables (with high wire to wire capacity) to the motor should be
avoided for the same reason.
Synchronizing Several Choppers
In some applications synchronous chopping of several stepper motor drivers may be
desirable to reduce acoustic interference. This can be done by forcing the oscillator of
the TLE 4727 by a pulse generator overdriving the oscillator loading currents
(approximately
±
120
μ
A). In these applications low level should be between 0 V and
0.8 V while high level should be between 3 V and 5 V.
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參數(shù)描述 |
|---|---|
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| TLE4728GNT | 制造商:Infineon Technologies AG 功能描述:2-Phase Stepping Motor Driver 24-Pin DSO |
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| TLE4729G | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 2-Ph Stepper Motor Driver; Bipolar 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 |
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