參數(shù)資料
型號(hào)： CS8441YN8
英文描述： Stepper Motor Controller/Driver
中文描述： 步進(jìn)電機(jī)控制器/驅(qū)動(dòng)器
文件頁(yè)數(shù)： 3/8頁(yè)
文件大?。?/td> 57K
代理商： CS8441YN8
CS8441
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (continued)
(–40
°
C
≤
T
A
≤
125
°
C, 6.5 V
≤
V
CC
≤
15.5 V; unless otherwise stated. All voltage
shall be referenced to GND unless otherwise noted. Overvoltage shutdown of coils occurs when V
CC
> 16 V.)
Characteristic
Unit
Max
Typ
Min
Test Conditions
Short Circuit Protection
Short Circuit Threshold
I Coil A + I Coil B
–
–
275
400
mA
Short Circuit Turn–Off Delay
–
–
5.0
–
μ
s
PACKAGE PIN DESCRIPTION
PACKAGE PIN #
DIP–8
PIN SYMBOL
FUNCTION
1
GND
Ground connection.
2
COILA+
Output stage, when active, this pin supplies current to COIL A.
3
COILA–
Output stage, when active, this pin supplies current to COIL A.
4
SENSOR
Input signal from wheel speed or engine rpm.
5
SELECT
Selects divide by 1 or divide by 2 mode.
6
COILB–
Output stage, when active, this pin supplies current to COIL B.
7
COILB+
Output stage, when active, this pin supplies current to COIL B.
8
V
CC
Supply voltage.
CIRCUIT OPERATION
SPEED SENSOR INPUT
SENSOR is a PNP comparator input which accepts a sine
wave or a square wave input. This input is protected from
excursions above V
CC
as well as any below ground, as long
as the current is limited to 1.5 mA. It has an active clamp set
to zero volts to prevent negative input voltages from
disrupting normal operation. The sensor input can withstand
150 V
DC
as long as the input current is limited to 1.5 mA
max. using a series resistor of 100 k
.
COIL DRIVER OUTPUTS
Simultaneously energizing the source and sink on either
leg is not permitted, i.e. Q1 & Q2 or Q3 & Q4 cannot be
energized simultaneously.
Circuit function is not affected by inductive transients due
to coil loads as specified in the Transition States section.
The transition states occur as indicated in Table 1 without
any intermediate states permitted.
Table 1. Transition States
State
Coil A
Coil B
0
+
+
1
OFF
+
2
–
+
3
–
OFF
4
–
–
5
OFF
–
6
+
–
7
+
OFF
The polarity definition for the coil driver outputs is as
follows:
Polarity
Connect Coil +
Connect Coil –
Positive (+)
V
CC
GND
GND
Negative (–)
V
CC
DIVIDER SELECT INPUT
The speed sensor input frequency is divided by one or
divided by two by connecting the divider select input, (Pin
5) as follows:
Logic 0 = divide by 2.
Logic 1 = divide by 1.
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