MP6507 –2.7V-TO-15V, 700mA, STEPPER MOTOR DRIVER

MP6507 Rev. 1.05

www.MonolithicPower.com

13

4/30/2018

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© 2018 MPS. All Rights Reserved.

APPLICATION INFORMATION

Driver Mode:

The MP6507 could be configured for both full-

step and half-step modes by sequentially

energizing the two windings.

Full-step drive energizes two winding phases at

any given time. The stator windings are

energized as per the sequence shown in Table 3.

There are a total of four steps for one cycle in the

——

B A

——

B

——



AB

——

.

Half-step energizes the stator windings as per

the sequence shown in Table 4. There are a total

of 8 steps for one cycle: ABB A

——

B A

——



A

——

B

——



B

——



AB

——



A.

Figure 7 shows the operating waveforms for both

full and half step drives.

AIN1

AIN2

BIN1

BIN2

H

L

H

L

H

L

H

L

0

0

AB

AB

AB

B

AB

AB

AB

AB

A

B

AB

AAB

Full Step

Half Step

Figure 7: Signal Logic Sequences for Full-Step

and Half-Step

Sequence

(Full Step)

1

2

3

4

A

+

+

B

+

+

A

——

+

+

B

——

+

+

Sequence

(Half Step)

1

2

3

4

5

6

7

8

A

+

+

+

B

+

+

+

A

——

+

+

+

B

——

+

+

+

Note:

5) A means +VIN between AOUT1 and AOUT2 for winding A,

while A

—

means -VIN between AOUT1 and AOUT2. The same

applies to winding B.

6) “+” item is the selected winding voltage.