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SAA1042A PDF даташит

Спецификация SAA1042A изготовлена ​​​​«Motorola Semiconductors» и имеет функцию, называемую «STEPPER MOTOR DRIVER».

Детали детали

Номер произв SAA1042A
Описание STEPPER MOTOR DRIVER
Производители Motorola Semiconductors
логотип Motorola Semiconductors логотип 

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SAA1042A Даташит, Описание, Даташиты
Order this document by SAA1042/D
Advance Information
Stepper Motor Driver
The SAA1042 drives a two–phase stepper motor in the bipolar mode. The
device contains three input stages, a logic section and two output stages.
The IC is contained in a 16 pin dual–in–line heat tab plastic package for
improved heatsinking capability. The center four ground pins are connected
to the copper alloy heat tab and improve thermal conduction from the die to
the circuit board.
Drive Stages Designed for Motors: 6.0 V and 12 V: SAA1042V
Drive Stages Designed for Motors: 6.0 V and 24 V: SAA1042AV
500 mA/Coil Drive Capability
Built–In Clamp Diodes for Overvoltage Suppression
Wide Logic Supply Voltage Range
Accepts Commands for CW/CCW and Half/Full Step Operation
Inputs Compatible with Popular Logic Families: MOS, TTL, DTL
Set Input Defined Output State
Drive Stage Bias Adaptable to Motor Power Dissipation for
Optimum Efficiency
SAA1042, A
STEPPER MOTOR
DRIVER
SEMICONDUCTOR
TECHNICAL DATA
16
1
V SUFFIX
PLASTIC PACKAGE
CASE 648C
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Figure 1. Representative Block Diagram
VZ
7 Clock
10 CW/CCW
8 Full/
Half Step
VCC
11
Logic
9
Gnd
VM
15
Driver
VD
2
3
L1
1 L2
M
Driver
6
Driver Bias
RB
Set
A
16
L3
14 L4
MOTOROLA ANALOG IC DEVICE DATA
PIN CONNECTIONS
L2 1
VD 2
L1 3
4
Gnd
5
Set/ 6
Driver Bias
Clock 7
Full/Half 8
Step
(Top View)
16 L3
15 VM
14 L4
13
Gnd
12
11 VCC
10 CW/CCW
9 Gnd
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
SAA1042V
Plastic DIP
TJ = – 30° to +125°C
SAA1042AV
Plastic DIP
© Motorola, Inc. 1995
1
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SAA1042A Даташит, Описание, Даташиты
SAA1042, A
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
Rating
Symbol SAA1042V SAA1042AV Unit
Clamping Voltage (Pins 1, 3, 14, 16)
Over Voltage (VOV = Vclamp – VM)
Supply Voltage
Switching or Motor Current/Coil
Input Voltage (Pins 7, 8, 10)
Vclamp
VOV
VCC
IM
Vin clock
Vin Full/Half
Vin CW/
CCW
20 30
6.0 6.0
20 30
500 500
VCC
V
V
V
mA
V
Power Dissipation (Note 1)
Thermal Resistance, Junction–to–Air
Thermal Resistance, Junction–to–Case
PD
θJA
θJC
2.0 W
80 °C/W
15
Operating Junction Temperature Range
Storage Temperature Range
TJ
Tstg
–30 to +125
–65 to +150
°C
°C
NOTE: 1. The power dissipation (PD) of the circuit is given by the supply voltage (VM and VCC) and the
motor current (IM), and can be determined from Figures 3 and 5. PD = Pdrive – Plogic.
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.)
Characteristics
Pin(s) Symbol VCC
Supply Current
11 ICC 5.0 V
20 V
Min
Typ
Max Unit
3.5 mA
8.5
Motor Supply Current
(IPin 6 = –400 µA, Pins 1, 3, 14, 16 Open)
VM = 6.0 V
VM = 12 V
VM = 24 V
Input Voltage, High State
15
7, 8, 10
IM
5.0 V
5.0 V
5.0 V
VIH 5.0 V 2.0
10 V
7.0
15 V
10
20 V
14
25
30
40
mA
—V
Input Voltage, Low State
Input Reverse Current, High State
(Vin = VCC)
VILwww.DataSheet.co.kr
7, 8, 10
IIR
5.0 V
10 V
15 V
20 V
5.0 V
10 V
15 V
20 V
0.8
1.5
2.5
3.5
2.0 µA
2.0
3.0
5.0
Input Forward Current, Low State
(Vin = Gnd)
IIF
Output Voltage, High State (VM = 12 V)
Iout = –500 mA
Iout = –50 mA
Output Voltage, Low State
Iout = 500 mA
Iout = 50 mA
Output Leakage Current, Pin 6 = Open
(VM = VD = Vclamp max)
Clamp Diode Forward Voltage (Drop at IM = 500 mA)
Clock Frequency
1, 3, 14, 16
1, 3, 14, 16
2
7
VOH
VOL
IDR
VF
fc
5.0 V
10 V
15 V
20 V
5.0 –
20 V
5.0 –
20 V
5.0 –
20 V
5.0 –
20 V
–10
–25
–40
–50
–100
0
VM – 2.0
VM – 1.2
0.7
0.2
2.5
3.5
50
V
µA
V
kHz
Clock Pulse Width
7
tw
5.0 –
10
20 V
µs
Set Pulse Width
Set Control Voltage, High State
Set Control Voltage, Low State
6 ts — 10 —
6
— — VM
——
µs
—V
0.5
2 MOTOROLA ANALOG IC DEVICE DATA
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SAA1042A Даташит, Описание, Даташиты
SAA1042, A
INPUT/OUTPUT FUNCTIONS
Clock — (Pin 7) This input is active on the positive edge of
the clock pulse and accepts Logic ‘1’ input levels dependent
on the supply voltage and includes hysteresis for noise
immunity.
CW/CCW — (Pin 10) This input determines the motor’s
rotational direction. When the input is held low, (OV, see the
electrical characteristics) the motor’s direction is nominally
clockwise (CW). When the input is in the high state, Logic ‘1’,
the motor direction is nominally counter clockwise (CCW),
depending on the motor connections.
Full/Half Step — (Pin 8) This input determines the angular
rotation of the motor for each clock pulse. In the low state, the
motor will make a full step for each applied clock pulse, while
in the high state, the motor will make half a step.
VD — (Pin 2) This pin is used to protect the outputs (1, 3,14,
16) where large positive spikes occur due to switching the
motor coils. The maximum allowable voltage on these pins is
the clamp voltage (Vclamp). Motor performance is improved if
a zener diode is connected between Pin 2 and 15, as shown
in Figure 1.
The following conditions have to be considered when
selecting the zener diode:
Vclamp = VM + 6.0 V
VZ = Vclamp – VM – VF
where: VF = clamp diodes forward voltage drop
VF = (see Figure 4)
Vclamp: 20 V for SAA1042V 30 V for
Vclamp: SAA1042AV
Pins 2 and 15 can be linked, in this case VZ = 0 V.
Set/Bias Input — (Pin 6) This input has two functions:
1) The resistor RB adapts the drivers to the motor current.
2) A pulse via the resistor RB sets the outputs (1, 3, 14, 16) to
a defined state.
The resistor RB can be determined from the graph of
Figure 2 according to the motor current and voltage. Smaller
values of RB will increase the power dissipation of the circuit
and larger values of RB may increase the saturation voltage
of the driver transistors.
When the “set” function is not used, terminal A of the
resistor RB must be grounded. When the set function is used,
terminal A has to be connected to an open–collector (buffer)
circuit. Figure 7 shows this configuration. The buffer circuit
(off–state) has to sustain the motor voltage (VM). When a
pulse is applied via the buffer and the bias resistor (RB), the
motor driver transistors are turned off during the pulse and
after the pulse has ended, the outputs will be in defined
states. Figure 6 shows the Timing Diagram.
Figure 7 illustrates a typical application in which the
SAA1042 drives a 12 V stepper motor with a current
consumption of 200 mA/coil. A bias resistor (RB) of 56 kis
chosen according to Figure 2.
The maximum voltage permitted at the output pin is
VM + 6.0 V (see Maximum Ratings table), in this application
VM = 12 V, therefore the maximum voltage is 18 V. The
outputs are protected by the internal diodes and an external
zener connected between Pins 2 and 15.
From Figure 4, it can be seen that the voltage drop across
the internal diodes is about 1.7 V at 200 mA. This results in a
zener voltage between Pins 2 and 15 of:
VZ = 6.0 V – 1.7 V = 4.3 V.
To allow for production tolerances and a safety margin, a
3.9 V zener has been chosen for this example.
The clock is derived from the line frequency which is
phase–locked by the MC14046B and the MC14024. The
voltage on the clock input is normally low (Logic ‘0’). The
motor steps on the positive going transition of the clock pulse.
The Logic ‘0’ applied to the Full/Half input (Pin 8) operates
the motor in Full Step mode. A Logic ‘1’ at this input will result
in Half Step mode. The logic level state on the CW/CCW
input (Pin 10), and the connection of the motor coils to the
outputs determines the rotational direction of the motor.
These two inputs should be biased to a Logic ‘0’ or ‘1’ and
not left floating. In the event of non–use, they should be tied
to ground or the logic supply line, VCC.
The output drivers can be set to a fixed operating point by
usewww.DataSheet.co.kr of the Set input and a bias resistor, RB. A positive pulse
to this input turns the drivers off and sets the logic state of the
outputs.
After the negative going transition of the Set pulse, and
until the first positive going transition of the clock, the outputs
will be:
L1 = L3 = high and L2 = L4 = low, (see Figure 6).
The Set input can be driven by a MC14007B or a transistor
whose collector resistor is RB. If the input is not used, the
bottom of RB must be grounded.
The total power dissipation of the circuit can be
determined from Figures 3 and 5:
PD = 0.9 W + 0.08 W = 0.98 W.
The junction temperature can then be computed using
Figure 8.
MOTOROLA ANALOG IC DEVICE DATA
3
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Номер в каталогеОписаниеПроизводители
SAA1042STEPPER MOTOR DRIVERMotorola  Inc
Motorola Inc
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