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A3967SLB 参数 Datasheet PDF下载

A3967SLB图片预览
型号: A3967SLB
PDF下载: 下载PDF文件 查看货源
内容描述: 微步进驱动器与转换器 [MICROSTEPPING DRIVER WITH TRANSLATOR]
分类和应用: 驱动器转换器运动控制电子器件信号电路光电二极管电动机控制
文件页数/大小: 16 页 / 510 K
品牌: ALLEGRO [ ALLEGRO MICROSYSTEMS ]
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3967
MICROSTEPPING DRIVER
WITH TRANSLATOR
REF
RC
2
SLEEP
OUT
2B
LOAD
SUPPLY
2
GND
GND
SENSE
2
OUT
2A
STEP
DIR
MS
1
1
2
3
4
5
6
7
8
9
10
11
12
TRANSLATOR
& CONTROL
LOGIC
V
CC
V
BB2
V
BB1
÷8
PWM
TIMER
24
PFD
23 RC
1
22 RESET
21 OUT
1B
LOAD
20 SUPPLY
1
19
18
17
16
GND
GND
SENSE
1
OUT
1A
The A3967SLB is a complete microstepping motor driver with
built-in translator. It is designed to operate bipolar stepper motors in
full-, half-, quarter-, and eighth-step modes, with output drive capabil-
ity of 30 V and ±750 mA. The A3967SLB includes a fixed off-time
current regulator that has the ability to operate in slow, fast, or mixed
current-decay modes. This current-decay control scheme results in
reduced audible motor noise, increased step accuracy, and reduced
power dissipation.
The translator is the key to the easy implementation of the
A3967SLB. By simply inputting one pulse on the STEP input the
motor will take one step (full, half, quarter, or eighth depending on two
logic inputs). There are no phase-sequence tables, high-frequency
control lines, or complex interfaces to program. The A3967SLB
interface is an ideal fit for applications where a complex µP is unavail-
able or over-burdened.
Internal circuit protection includes thermal shutdown with hyster-
esis, under-voltage lockout (UVLO) and crossover-current protection.
Special power-up sequencing is not required.
The A3967SLB is supplied in a 24-lead SOIC with copper batwing
tabs. The tabs are at ground potential and need no insulation. A lead-
free (100% matte tin leadframe) version is also available.
Data Sheet
26184.24C
15 ENABLE
14
13
LOGIC
SUPPLY
MS
2
Dwg. PP-075-2
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25°C
Load Supply Voltage, V
BB
.............
30 V
Output Current, I
OUT
Continuous .....................
±750 mA
*
Peak .................................
±850 mA
Logic Supply Voltage, V
CC
...........
7.0 V
Logic Input Voltage Range, V
IN
(t
w
>30 ns) .............
-0.3 V to +7.0 V
(t
w
<30 ns) ................
-1 V to +7.0 V
Sense Voltage, V
SENSE
...............
0.68 V
Reference Voltage, V
REF
................
V
CC
Package Power Dissipation,
P
D
.................................
See page 8
Operating Temperature Range,
T
A
...........................
-20°C to +85°C
Junction Temperature, T
J
.........
+150°C
Storage Temperature Range,
T
S
.........................
-55°C to +150°C
* Output current rating may be limited by
duty cycle, ambient temperature, and heat
sinking. Under any set of conditions, do not
exceed the specified current rating or a
junction temperature of 150°C.
FEATURES
s
s
s
s
s
s
s
±750 mA, 30 V Output Rating
Satlington™ Sink Drivers
Automatic Current-Decay Mode Detection/Selection
3.0 V to 5.5 V Logic Supply Voltage Range
Mixed, Fast, and Slow Current-Decay Modes
Internal UVLO and Thermal Shutdown Circuitry
Crossover-Current Protection
Always order by complete part number:
Part Number
A3967SLB
A3967SLB-T
Package
24-lead batwing SOIC
24-lead batwing SOIC; Lead-free