SLA7042 データシートの表示（PDF） - Sanken Electric co.,ltd.

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SLA7042

2-Phase Stepper Motor Unipolar Driver ICs

Sanken Electric co.,ltd. 

2-Phase Stepper Motor Unipolar Driver ICs (2W1-2 Phase Excitation/Micro-step Support)

SLA7042M/SLA7044M

sInternal Block Diagram

OFF time timer

(TOFF 3-step switching)

PWM

Chopper ON

Noise filter

(2 µ s)

COMP

Enable

Reference voltage

Vref a b c

0% 0 0 0

20% 1 0 0

40% 0 1 0

55.5% 1 1 0

71.4% 0 0 1

83% 1 0 1

91% 0 1 1

100% 1 1 1

Phase

Reset

Latch

Ph. a b c

Reset

Shift register

Ph. a b c

Reference voltage

cba

Vref

000

0%

0 0 1 20%

0 1 0 40%

0 1 1 55.5%

1 0 0 71.4%

1 0 1 83%

1 1 0 91%

1 1 1 100%

Phase

Latch

Reset

c b a Ph.

Shift register

Reset

c b a Ph.

OFF time timer

(TOFF 3-step switching)

Chopper ON

Noise filter

(2 µ s)

PWM

COMP

Enable

sOutput Current Formula

K VREF

IO = •

3 RS

K: Reference voltage setting rate by serial signal

(See the internal block diagram)

sDiagram of Standard External Circuit

VCC

5V

4 15 1 8 11 18

R1

VDDA VDDB OUT A OUT A OUT B OUT B

CLOCK A 5

VREF

ENABLE

3 REF A

REF B

14

SLA7042M

SLA7044M

CLOCK B 16

STROBE A 2

STROBE B 13

R2

C1

GND A GND B

RS A

DATA A 6

DATA B 17

RS B

7 12

9

10

RS

RS

C1 : 500 to 10000pF

SLA7042M/SLA7044M 45

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