參數(shù)資料
型號(hào)： tle 4728
廠商： SIEMENS AG
英文描述： 4-Phase Stepper-Motor Driver(兩相步進(jìn)式馬達(dá)驅(qū)動(dòng)器)
中文描述： 4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(yè)數(shù)： 23/25頁(yè)
文件大小： 219K
代理商： TLE 4728
TLE 4728 G
Data Sheet
23
1999-05-18
Application Hints
The TLE 4728 G 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 4728 G will work with supply voltages ranging from 5 V to 16 V at pin
V
S
.
Surges exceeding 16 V at
V
S
wont 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 4728 G
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,
0.45 V and 0.7 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 bounding wire (typ. 60 m
)
is a part of
R
sense
.
Due to chopper control fast current rises (up to 10 A/
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 synchrone chopping of several stepper motor drivers may be
desirable to reduce acoustic interference. This can be done by forcing the oscillator of
the TLE 4728 G 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 between 3 V and 5 V.
Optimizing Noise Immunity
Unused inputs should always be wired to proper voltage levels in order to obtain highest
possible noise immunity.
To prevent crossconduction of the output stages the TLE 4728 G uses a special break
before make timing of the power transistors. This timing circuit can be triggered by short
glitches (some hundred nanoseconds) at the phase inputs causing the output stage to
become high resistive during some microseconds. This will lead to a fast current decay
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLE4728G 制造商:Rochester Electronics LLC 功能描述:- Bulk
TLE4728GNT 制造商:Infineon Technologies AG 功能描述:2-Phase Stepping Motor Driver 24-Pin DSO
TLE4728GZT 制造商:Infineon Technologies AG 功能描述:2-Phase Stepping Motor Driver 24-Pin DSO T/R
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
TLE4729-G 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:2-Phase Stepper-Motor Driver Bipolar-IC
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