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參數(shù)資料
| 型號(hào)： | CS8442XN8 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, MS-001, DIP-8 |
| 文件頁(yè)數(shù)： | 3/4頁(yè) |
| 文件大?。?/td> | 44K |
| 代理商： | CS8442XN8 |
3
SENSOR IN is a PNP comparator input that accepts a sine or
square wave input. Signals in excess of VCC or Ground will not
damage the input as long as the input current is limited to
1.5mA. An active clamp at 0V prevents negative input voltages
from disrupting normal operation. The input can withstand 150
VDC as long as the input current does not exceed 1.5mA. This is
possible if a 100k
resistor is placed in series with the SENSOR
IN.
SENSOR OUT is an open collector NPN transistor that produces
a buffered and inverted version of the SENSOR IN signal. It is
capable of driving a 4.7k
load connected to a 5V supply.
The eight step sequencer moves the two H bridge output drivers
through 8 sequential states (Table 1, Figure 1). In State 0, current
flows from COILA+ out through COIL A and back in through
COILA-. The same polarity also holds for COIL B. In State 1,
COIL A outputs turn off while COIL B outputs continue con-
ducting with the same polarity. In State 2, current flows from
COIL A- out through the coil and back in COIL A+. COIL B out-
puts continue with their original polarity. COIL A outputs
maintain this polarity through States 3 and 4 during which
COIL B outputs are first turned off and then reversed. COIL B’s
reversed polarity continues in Stages 5 and 6. COIL A’s outputs
are turned off in Stage 5 and then turned back on (positive
polarity) in Stage 6. In Stage 7, COIL B is off and COILA outputs
continue with a positive polarity.
Table 1: Transition States
The polarity definition for the coil driver outputs is as follows:
Connect
Polarity
Coil +
Coil -
Positive (+)
VCC
Gnd
Negative (-)
Gnd
VCC
Each H-bridge output stage consists of 4 power NPN transistors
with fly back diodes (Figure 2). Each half bridge has a composite
saturation voltage of 1.5V at VCC=15.5V and IOUT = 85mA.
The output stage is designed to prevent cross conduction: i.e., at
no time can Q1 and Q2 or Q3 and Q4 conduct. This dead zone
time minimizes fly back energy and helps protect the output
stages from damage.
The CS8442 is protected from short circuit, over voltage and
thermal runaway conditions. When any of these faults is detect-
ed, an internal flip-flop is set and both H bridges are disabled.
When the fault condition is removed, the Flip-Flop is reset after
the first positive going edge from the speed sensor input.
CS8442
Package Pin Description
Application Information
Speed Sensor
Sequencer
H Bridge Outputs A and B
Protection Circuitry
PACKAGE PIN #
PIN SYMBOL
FUNCTION
8L PDIP
1
Gnd
Ground connection.
2
COILA+
Output stage, when active, supplies current to COIL A.
3
COILA-
Output stage, when active, supplies current to COIL A.
4
SENSOR IN
Input signal from wheel speed or engine rpm.
5
SENSOR OUT
Buffered and inverted output of SENSOR IN signal.
6
COILB-
Output stage, when active, supplies current to COIL B.
7
COILB+
Output stage, when active, supplies current to COIL B.
8VCC
Supply Voltage.
Short
Circuit
VCC
Sense
Resistor
Coil
Short
Circuit
Sense
Resistor
Gnd
Q3
Q4
Q1
Q2
Overvoltage
and
Short
Circuit
Protection
Figure 2: Coil Driver Output
Figure 1: State Diagram for Coil Outputs
0
1
2
3
4
5
6
7
0
COIL A
COIL B
+
–
+
–
STATE #
Output State Table
State
Coil A
Coil B
0+
+
1
OFF
+
2-
+
3
-
OFF
4-
-
5
OFF
-
6+
-
7
+
OFF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CS9ARH-FREQ1 | CRYSTAL OSCILLATOR, CLOCK, 50 MHz - 300 MHz, PECL OUTPUT |
| CS9TRH-FREQ2 | CRYSTAL OSCILLATOR, CLOCK, 300.001 MHz - 700 MHz, PECL OUTPUT |
| CS9ASH-FREQ1 | CRYSTAL OSCILLATOR, CLOCK, 50 MHz - 300 MHz, PECL OUTPUT |
| CS9AUH-FREQ1 | CRYSTAL OSCILLATOR, CLOCK, 50 MHz - 300 MHz, PECL OUTPUT |
| CS9AUH-FREQ2 | CRYSTAL OSCILLATOR, CLOCK, 300.001 MHz - 700 MHz, PECL OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CS844A1 | 制造商:HVPSI 制造商全稱:High Voltage Power Solutions, Inc. 功能描述:MOV Modules |
| CS844A2 | 制造商:HVPSI 制造商全稱:High Voltage Power Solutions, Inc. 功能描述:MOV Modules |
| CS844B1 | 制造商:HVPSI 制造商全稱:High Voltage Power Solutions, Inc. 功能描述:MOV Modules |
| CS844B2 | 制造商:HVPSI 制造商全稱:High Voltage Power Solutions, Inc. 功能描述:MOV Modules |
| CS844C1 | 制造商:HVPSI 制造商全稱:High Voltage Power Solutions, Inc. 功能描述:MOV Modules |
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