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参数资料
| 型号： | L6219DS |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1 A, PDSO24 |
| 封装： | SOIC-24 |
| 文件页数： | 4/8页 |
| 文件大小： | 961K |
| 代理商： | L6219DS |
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
L6219DS
DUAL FULL-BRIDGE
MOTOR DRIVER
APPLICATIONS INFORMATION
PWM CURRENT CONTROL
The L6219DS dual bridge is designed to drive both
windings of a bipolar stepper motor. Output current is
sensed and controlled independently in each bridge by an
external sense resistor (R
S), internal comparator, and
monostable multivibrator.
When the bridge is turned on, current increases in
the motor winding and it is sensed by the external sense
resistor until the sense voltage (V
COMPIN) reaches the level
set at the comparator’s input:
I
TRIP = VREF/10 RS
The comparator then triggers the monostable which
turns off the source driver of the bridge. The actual load
current peak will be slightly higher than the trip point
(especially for low-inductance loads) because of the
internal logic and switching delays. This delay (t
d) is
typically 2 s. After turn-off, the motor current decays,
circulating through the ground-clamp diode and sink
transistor. The source driver’s off time (and therefore the
magnitude of the current decrease) is determined by the
monostable’s external RC timing components, where
t
off = RTCT within the range of 20 k to 100 k and 100 pF
to 1000 pF.
The fixed-off time should be short enough to keep the
current chopping above the audible range (< 46 s) and
long enough to properly regulate the current. Because
only slow-decay current control is available, short off
times (< 10 s) require additional efforts to ensure proper
current regulation. Factors that can negatively affect the
ability to properly regulate the current when using short off
times include: higher motor-supply voltage, light load, and
longer than necessary blank time.
When the source driver is re-enabled, the winding
current (the sense voltage) is again allowed to rise to the
comparator’s threshold. This cycle repeats itself, main-
taining the average motor winding current at the desired
level.
Loads with high distributed capaci-tances may result
in high turn-on current peaks. This peak (appearing
across R
S) will attempt to trip the comparator, resulting in
erroneous current control or high-frequency oscillations.
An external R
CCC time delay should be used to further
delay the action of the comparator. Depending on load
type, many applications will not require these external
components (SENSE connected to COMP IN).
PWM OUTPUT CURRENT WAVE FORM
LOAD CURRENT PATHS
+
–
0
Dwg. W M-003-1A
V PHAS E
I
OUT
td
toff
I TR IP
Dwg. E P -006-1
R S
BB
V
BR IDG E ON
SOUR C E OF F
ALL OF F
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6219DS013TR | 功能描述:马达/运动/点火控制器和驱动器 Dual Stepper Motor RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L6219DS013TRE | 制造商:STMicroelectronics 功能描述: |
| L6219DSA | 功能描述:马达/运动/点火控制器和驱动器 Dual Stepper Motor RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L6219DSA_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Stepper motor driver for automotive range |
| L6219DSA13TR | 功能描述:马达/运动/点火控制器和驱动器 Dual Stepper Motor RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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