MP6506 –2.7V-TO-15V, 500mA, STEPPER MOTOR DRIVER

MP6506 Rev. 1.0

www.MonolithicPower.com

11

5/22/2014

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APPLICATION INFORMATION

Driver Mode:

The MP6506 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 5 shows the operating waveforms for both

full and half step drives.

Figure 5: Signal Logic Sequences for Full-Step

and Half-Step

Table 3

Sequence

(Full Step)

1

2

3

4

A

+

+

B

+

+

A

——

+

+

B

——

+

+

Table 4

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.