ON Semiconductor MC3479 Technical data

MC3479

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

• 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)

Clk

Clock

drive state.

V

M

Driver

L1

PLASTIC PACKAGE

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STEPPER MOTOR

DRIVER

PDIP

P SUFFIX

CASE 648C

MARKING DIAGRAM

MC3479P

AWLYYWW

CW

Full Step

/CCW

/Half

OIC

CW/CCW

F

/H Step

OIC

Logic

Driver

GndBias/SetPhase A

Figure 1. Representative Block Diagram

ORDERING INFORMATION

Operating

Device

MC3479P TA = 0° to +70°C PDIP 25 Units / Rail MC3479P TA = 0° to +70°C PDIP 2000 Units / Box

Temperature Range

Package Shipping

L2

V

D

L3

L4

Gnd

Bias

/CCW

CW Full/Half Step OIC

MC3479P = Specific Device Code A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week

PIN CONNECTIONS

16

15

14

13

12

11

10

9

V

M

L3

L4

Gnd

Phase A

CW/CCW

l/Half

Ful Step

/Set

OIC

1

V

D

2

L2

3

L1

4

5

6

Clk

7

8

(Top View)

INPUT TRUTH TABLE

Input Low Input High

CW CCW

Full Step Half Step

Hi Z Low Z

Positive Edge TriggeredClk

 Semiconductor Components Industries, LLC, 2003

November, 2003 − Rev. 5

1 Publication Order Number:

MC3479/D

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

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

1. See section on Power Dissipation in Application Information.

OD

BS

OA

stg

OD

BS

OA

M D

+ 18 Vdc VM + 5.0 Vdc VM + 6.0 Vdc

± 500 mA

in

− 0.5 to + 7.0 Vdc

− 10 mA

+ 18 Vdc

20 mA

J

+ 150 °C

− 65 to + 150 °C

+ 7.2 + 16.5 Vdc

M D

V

M

− 350 mA

in

0 + 5.5 Vdc

−300 − 75 A

− V 0 8.0 mA

A

0 + 70 °C

V

+ 4.5 Vdc

M

Vdc

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2

MC3479

Out ut High Voltage (I

BS

300 A)

I

OD

350 mA

2, 3

V

OHD

V

M

2.0

Vdc

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)

(VI = 5.5 V) (V

= 2.7 V)

I

DRIVER OUTPUT LEVELS

Output High Voltage (I

= − 300 A) IOD = − 350 mA 2, 3, V

BS

IOD = − 0.1 mA Output Low Voltage (IBS = − 300 A, IOD = 350 mA) V Differential Mode Output Voltage Difference (Note 4)

(I

= − 300 A, IOD = 350 mA)

BS

Output Leakage, Hi Z State

(0  VOD  VM, IBS = − 5.0 A)

(0  V

 VM, IBS = − 300 A, F/H = 2.0 V, OIC = 0.8 V)

OD

CLAMP DIODES

Forward Voltage

= 350 mA)

(I

D

Leakage Current (Per Diode)

(Pin 1 = 21 V; Outputs = 0 V; IBS = 0 A)

PHASE A OUTPUT

Output Low Voltage

(I

= 8.0 mA)

OA

Off State Leakage Current

(V

= 16.5 V)

OHA

POWER SUPPLY

Power Supply Current

= 0 A, IBS = − 300 A)

(I

(L1 = V

OHD

, L2 = V

OHD

, L2 = V

OLD

, L2 = V

OLD

OD

, L3 = V

, L3 = Hi Z, L4 = Hi Z)

OLD

, L3 = V

OHD

, L4 = V

OLD

OHD

) )

BIAS/SET CURRENT

To Set Phase A 6 I

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

OD

= V

5. CV

OD1,2 OHD1

− V

OD3,4

OHD2

 where:V

 or V

OHD3

OD1,2

− V

= (V

OHD4

OHD1

.

− V

OLD2

) or (V

OHD2

− V

OLD1

Pins Symbol Min Typ Max Unit

7, 8,

9, 10

14, 15

14, 15 DV

,

V

TLH

V

THL

HYS

I

IL

OHDVM

OLD

OD

CV

OD

− − 2.0 Vdc

0.8 − − Vdc

0.4 − − Vdc

−100

−

−2.0 − − Vdc

V

−1.2 − −

M

−

+100

−

+20

− − 0.8 Vdc

−

−−0.15

0.15

14, 15

1, 2, 3,

14, 15

11

V

I

OZ1

I

OZ2

V

I

DR

OLA

OHA

DF

−100

−−+100 +100

− 2.5 3.0 Vdc

− − 100 A

− − 0.4 Vdc

− − 100 A

16

), and V

OD3,4

I

I I

= (V

MW MZ MN

BS

OHD3

−

70

−

40

−

75

− 5.0 − − A

− V

OLD4

) or (V

OHD4

− V

−

A

Vdc

A

mA

).

OLD3

PACKAGE THERMAL CHARACTERISTICS

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

Characteristic Symbol Min Typ Max Unit



JA

− 45 − °C/W

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3

MC3479

AC SWITCHING CHARACTERISTICS (T

Characteristic

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

A

Pins Symbol Min Typ Max Unit

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

9−7

Hold Time (CW/CCW and F/HS) 10−7

9−7 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

6. Algebraic convention rather than absolute values is used to designate limit values.

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

CK

CKH CKL

t

su

t

h

PCD

PBSD

PHLA PLHA

0 − 50 kHz 10 − − s 10 − − s 10 − − s

BS

5.0 − − s

10 − − s

− 8.0 − s

− 1.0 − s

− 12 − s

− 5.0 − s

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