Motorola MC3479P Datasheet

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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

• 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

drive state.

Order this document by MC3479/D

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STEPPER MOTOR

DRIVER

SEMICONDUCTOR

TECHNICAL DATA

P SUFFIX

PLASTIC PACKAGE

CASE 648C

Figure 1. Representative Block Diagram

Clock

CW/CCW

/H Step

OIC

Logic

/SetPhase A

Driver

GndBias

Full Step

Clk

/CCW

/Half

OIC

ORDERING INFORMATION

Operating

Device

MC3479P TA = 0° to +70°C Plastic

Temperature Range

Package

PIN CONNECTIONS

11 12 13 Full/Half Step

Phase A

CW/CCW

16 15 14 13 12 11 10

V L3 L4

Phase A CW/CCW Ful

Step

17 16 15 148

Gnd

l/Half

L4 Gnd Gnd Gnd Gnd

L2 V

Gnd

5 6

Bias

/Set

Clk

7 8

OIC

(Top View)

21519

418

Gnd Gnd

Gnd

Bias/Set

9 Clk

OIC

INPUT TRUTH TABLE

Input Low Input High

/CCW /Half Step

Full OIC

CW CCW

Full Step Half Step

Hi Z Low Z

Positive Edge TriggeredClk

MOTOROLA ANALOG IC DEVICE DATA

 Motorola, Inc. 1996 Rev 1

MC3479

MAXIMUM RATINGS

Rating Symbol Value Unit

Supply Voltage V Clamp Diode Cathode Voltage (Pin 1) V Driver Output Voltage V Drive Output Current/Coil I Input Voltage (Logic Controls) V Bias/Set Current I Phase A Output Voltage V Phase A Sink Current I Junction Temperature T Storage Temperature Range T

M D

stg

RECOMMENDED OPERATING CONDITIONS

Characteristic Symbol Min Max Unit

Supply Voltage V Clamp Diode Cathode Voltage V Driver Output Current (Per Coil) (Note 1) I Input Voltage (Logic Controls) V Bias/Set Current (Outputs Active) I Phase A Output Voltage V Phase A Sink Current I Operating Ambient Temperature T

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

+ 18 Vdc VM + 5.0 Vdc VM + 6.0 Vdc

± 500 mA

– 0.5 to + 7.0 Vdc

– 10 mA

+ 18 Vdc

20 mA

+ 150 °C

– 65 to + 150 °C

M D

+ 7.2 + 16.5 Vdc

VM + 4.5 Vdc

— 350 mA

0 + 5.5 Vdc

– 300 – 75 µA

— V

Vdc

0 8.0 mA

0 + 70 °C

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

2, 3] unless otherwise noted.)

Characteristic

INPUT LOGIC LEVELS

Threshold Voltage (Low–to–High) Threshold Voltage (High–to–Low) Hysteresis V Current: (VI = 0.4 V)

Current: (VI = 5.5 V) Current: (VI = 2.7 V)

DRIVER OUTPUT LEVELS

Output High Voltage 2, 3, V

(IBS = – 300 µA): (IOD = – 350 mA)

(IBS = – 300 µA): (IOD = – 0.1 mA)

Output Low Voltage V

(IBS = – 300 µA, IOD = 350 mA)

Differential Mode Output Voltage Difference (Note 4) DV

(IBS = – 300 µA, IOD = 350 mA)

Common Mode Output Voltage Dif ference (Note 5) CV

(IBS = – 300 µA, IOD = – 0.1 mA)

Output Leakage, Hi Z State µA

(0 p VOD p VM, IBS = – 5.0 µA) I (0 p VOD p VM, IBS = – 300 µA, F/H = 2.0 V, OIC = 0.8 V) I

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 = V

5.CVOD = V

OD1,2 OHD1

– V

OD3,4 OHD2

 where: V

 or V

OHD3

OD1,2

OD3,4

– V

= (V

OHD4

OHD1

= (V

.

– V

OHD3

OLD2

– V

) or (V

OLD4

Pins Symbol Min Typ Max Unit

7, 8,

9, 10

V V

TLH THL

HYS

— — 2.0 Vdc

0.8 — — Vdc

0.4 — — Vdc

–100

— —

+100

—

+20

OHD

14, 15 VM – 2.0

VM – 1.2——

— — 0.8 Vdc

— — 0.15 Vdc

– 100 — + 100 – 100 — + 100

OHD2

) or (V

– V

OHD4

OLD1

– V

), and

OLD3

OLD

OZ1 OZ2

—

µA

Vdc — —

MOTOROLA ANALOG IC DEVICE DATA

MC3479

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

2, 3] unless otherwise noted.)

Characteristic

CLAMP DIODES

Forward Voltage 1, 2, 3, V

(ID = 350 mA) 14, 15

Leakage Current (Per Diode) I

(Pin 1 = 21 V; Outputs = 0 V; IBS = 0 µA)

PHASE A OUTPUT

Output Low Voltage 11 V

(IOA = 8.0 mA)

Off State Leakage Current I

= 16.5 V)

OHA

POWER SUPPLY

Power Supply Current 16 mA

(IOD = 0 µA, IBS = – 300 µA) (L1 = V (L1 = V (L1 = V

BIAS/SET CURRENT

To Set Phase A 6 I

OHD OHD OHD

, L2 = V , L2 = V , L2 = V

, L3 = V

OLD

, L3 = Hi Z, L4 = Hi Z) I

OLD

, L3 = V

OLD

OHD

, L4 = V

) I

OLD

) I

OHD

Pins Symbol Min Typ Max Unit

OLA

OHA

— 2.5 3.0 Vdc

— — 100 µA

— — 0.4 Vdc

— — 100 µA

— — 70 — — 40 — — 75

– 5.0 — — µA

PACKAGE THERMAL CHARACTERISTICS

Characteristic Symbol Min Typ Max Unit

Thermal Resistance, Junction–to–Ambient (No Heatsink) R

AC SWITCHING CHARACTERISTICS (T

Characteristic

Clock Frequency 7 f Clock Pulse Width (High) 7 PW Clock Pulse Width (Low) 7 PW Bias/Set Pulse Width 6 PW Setup Time (CW/CCW and F/HS) 10–7

Hold Time (CW/CCW and F/HS) 10–7

Propagation Delay (Clk–to–Driver Output) t Propagation Delay (Bias/Set–to–Driver Output) t Propagation Delay (Clk–to–Phase A Low) 7–11 t Propagation Delay (Clk–to–Phase A High) 7–11 t

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.

= + 25°C, VM = 12 V) (See Figures 2, 3, 4)

Pins Symbol Min Typ Max Unit

9–7

θJA

CKH

CKL

PCD

PBSD

PHLA PLHA

— 45 — °C/W

0 — 50 kHz 10 — — µs 10 — — µs 10 — — µs

5.0 — — µs

10 — — µs

— 8.0 — µs — 1.0 — µs — 12 — µs — 5.0 — µs

MOTOROLA ANALOG IC DEVICE DATA

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