MC3479PG ON Semiconductor, MC3479PG Datasheet - Page 4

• Manufacturer Part Number: MC3479PG
• Description: IC DRIVER STEPPER MOTOR 16DIP
• Manufacturer: ON Semiconductor
• Type: Stepper Motor Controllerr

Specifications of MC3479PG

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: 350mA
• Voltage - Supply: 7.2 V ~ 16.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Product: Stepper Motor Controllers / Drivers
• Supply Current: 75 mA
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MC3479PGOS

PIN FUNCTION DESCRIPTION
12, 13
14, 15
Pin #
CW / CCW
4, 5,
2, 3,
16
10
11
1
6
7
9
8
Bias/Set
F / HS
OIC
Clk
Clamp Diode Voltage
Output Impedance
Counterclockwise
Figure 2. AC Test Circuit
Driver Outputs
Power Supply
Full/Half Step
Clockwise/
Function
56 k
Phase A
Bias/Set
Ground
Control
Clock
+ 12 V
6
7
8
9
10
4
MC3479P
V
5
M
16
12 13
14
15
2
3
L1, L2 L3,
CW/CCW
Symbol
0.1 mF
11
L2
L1
L4
L3
GND
F/HS
Ph A
OIC
B/S
V
Clk
V
L4
4.0 k
M
D
1.0 k
1.0 k
1.0 k
1.0 k
1.0 k
1.0 k
Power supply pin for both the logic circuit and the motor coil current. Voltage range is
+ 7.2 to + 16.5 V.
Ground pins for the logic circuit and the motor coil current. The physical configuration of
the pins aids in dissipating heat from within the IC package.
This pin is used to protect the outputs where large voltage spikes may occur as the
motor coils are switched. Typically a diode is connected between this pin and Pin 16.
See Figure 12.
High current outputs for the motor coils. L1 and L2 are connected to one coil, and L3 and
L4 to the other coil.
This pin is typically 0.7 volts below V
ground) determines the maximum output sink current. If the pin is opened (I
the outputs assume a high impedance condition, while the internal logic presets to a
Phase A condition.
The positive edge of the clock input switches the outputs to the next position. This input
has no effect if Pin 6 is open.
When low (Logic “0”), each clock input pulse will cause the motor to rotate one full step.
When high, each clock pulse will cause the motor to rotate one−half step. See Figure 7
for sequence.
This input allows reversing the rotation of the motor. See Figure 7 for sequence.
This input is relevant only in the half step mode (Pin 9 > 2.0 V). When low (Logic “0”),
the two driver outputs of the non−energized coil will be in a high impedance condition.
When high the same driver outputs will be at a low impedance referenced to V
Figure 7.
This open−collector output indicates (when low) that the driver outputs are in the Phase
A condition (L1 = L3 = V
+ 12 V
Phase A
http://onsemi.com
MC3479
Bias/Set
Input
4
L1 − L4
Outputs
OHD
Figure 3. Bias/Set Timing (Refer to Figure 2)
0
V
M
, L2 = L4 = V
M
Description
. The current out of this pin (through a resistor to
Note: t
input signals are p 25 ns.
V
OLD
M
− 1.0
r
, t
).
f
t
PBSD
(10% to 90%) for
PW
BS
(High Impedance)
V
M
− 1.0
t
PBSD
BS
< 5.0 mA)
M
. See