Motorola Electronic Components Datasheet

MC3479 Datasheet

STEPPER MOTOR DRIVER

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Stepper Motor Driver

The MC3479 is designed to drive a two–phase stepper motor in the

bipolar mode. The circuit consists of four input sections, a logic

decoding/sequencing section, two driver–stages for the motor coils, and an

output to indicate the Phase A drive state.

• Single Supply Operation: 7.2 to 16.5 V

• 350 mA/Coil Drive Capability

• Clamp Diodes Provided for Back–EMF Suppression

• Selectable CW/CCW and Full/Half Step Operation

• Selectable High/Low Output Impedance (Half Step Mode)

• TTL/CMOS Compatible Inputs

• Input Hysteresis: 400 mV Minimum

• Phase Logic Can Be Initialized to Phase A

• Phase A Output Drive State Indication (Open–Collector)

• Available in Standard DIP and Surface Mount

MC3479

STEPPER MOTOR

DRIVER

SEMICONDUCTOR

TECHNICAL DATA

P SUFFIX

PLASTIC PACKAGE

CASE 648C

Figure 1. Representative Block Diagram

Clk Clock

CW/CCW

Full/Half

Step

OIC

F/H Step

OIC

Logic

Driver

Phase A

Bias/Set

Gnd

Device

MC3479P

ORDERING INFORMATION

Operating

Temperature Range

TA = 0° to +70°C

Package

Plastic

PIN CONNECTIONS

VD 1

L2 2

L1 3

Gnd

Bias/Set 6

Clk 7

OIC 8

16 VM

15 L3

14 L4

Gnd

11 Phase A

10 CW/CCW

9 Full/Half

Step

(Top View)

3 2 1 20 19

Gnd

Bias/Set

18 L4

17 Gnd

16 Gnd

15 Gnd

14 Gnd

9 10 11 12 13

INPUT TRUTH TABLE

Input Low Input High

CW/CCW

CW CCW

Full/Half Step

Full Step

Half Step

OIC Hi Z Low Z

Clk Positive Edge Triggered

MOTOROLA ANALOG IC DEVICE DATA

Rev 1

Motorola Electronic Components Datasheet

MC3479 Datasheet

STEPPER MOTOR DRIVER

No Preview Available !

MC3479

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Supply Voltage

Clamp Diode Cathode Voltage (Pin 1)

Driver Output Voltage

Drive Output Current/Coil

Input Voltage (Logic Controls)

Bias/Set Current

Phase A Output Voltage

Phase A Sink Current

Junction Temperature

Storage Temperature Range

VOD

IOD

Vin

IBS

VOA

IOA

Tstg

+ 18

VM + 5.0

VM + 6.0

± 500

– 0.5 to + 7.0

– 10

+ 18

+ 150

– 65 to + 150

Vdc

°C

RECOMMENDED OPERATING CONDITIONS

Characteristic

Symbol

Min Max

Unit

Supply Voltage

Clamp Diode Cathode Voltage

Driver Output Current (Per Coil) (Note 1)

Input Voltage (Logic Controls)

Bias/Set Current (Outputs Active)

Phase A Output Voltage

Phase A Sink Current

Operating Ambient Temperature

NOTE: 1. See section on Power Dissipation in Application Information.

IOD

Vin

IBS

VOA

IOA

+ 7.2

—

– 300

—

+ 16.5

VM + 4.5

350

+ 5.5

– 75

8.0

+ 70

Vdc

µA

Vdc

°C

DC ELECTRICAL CHARACTERISTICS (Specifications apply over the recommended supply voltage and temperature range, [Notes

2, 3] unless otherwise noted.)

Characteristic

Pins Symbol Min

Typ Max

Unit

INPUT LOGIC LEVELS

Threshold Voltage (Low–to–High)

Threshold Voltage (High–to–Low)

7, 8,

9, 10

VTLH

VTHL

Hysteresis

VHYS

Current: (VI = 0.4 V)

Current: (VI = 5.5 V)

Current: (VI = 2.7 V)

IIL

DRIVER OUTPUT LEVELS

Output High Voltage

(IBS = – 300 µA): (IOD = – 350 mA)

(IBS = – 300 µA): (IOD = – 0.1 mA)

2, 3,

14, 15

VOHD

Output Low Voltage

(IBS = – 300 µA, IOD = 350 mA)

VOLD

Differential Mode Output Voltage Difference (Note 4)

(IBS = – 300 µA, IOD = 350 mA)

DVOD

Common Mode Output Voltage Difference (Note 5)

(IBS = – 300 µA, IOD = – 0.1 mA)

CVOD

Output Leakage, Hi Z State

p p(0 VOD VM, IBS = – 5.0 µA)

p p(0 VOD VM, IBS = – 300 µA, F/H = 2.0 V, OIC = 0.8 V)

IOZ1

IOZ2

NOTES: 2. Algebraic convention rather than absolute values is used to designate limit values.

3. Current into a pin is designated as positive. Current out of a pin is designated as negative.

4. DVOD = VOD1,2 – VOD3,4 where: VOD1,2 = (VOHD1 – VOLD2) or (VOHD2 – VOLD1), and

VOD3,4 = (VOHD3 – VOLD4) or (VOHD4 – VOLD3).

5. CVOD = VOHD1 – VOHD2 or VOHD3 – VOHD4.

—

0.8

0.4

– 100

—

VM – 2.0

VM – 1.2

—

– 100

—

2.0

—

+ 100

+ 20

—

0.8

0.15

+ 100

Vdc

µA

Vdc

µA

2 MOTOROLA ANALOG IC DEVICE DATA

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MC3479 Datasheet

STEPPER MOTOR DRIVER

MC3479 Datasheet

STEPPER MOTOR DRIVER

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