MTS2916A

DS22259C-page 12

 2010-2013 Microchip Technology Inc.

4.2

Stepping Examples

The MTS2916A control modes are full-step, half-step,

modified half-step and microstepping control of the

motor, as shown in Figure 4-2.

FIGURE 4-2:

Examples of Stepping Modes Achievable with Typical Application Circuit.

4.3

PCB Design Guidelines

Unused inputs should be connected to fixed voltage

levels in order to get the highest noise immunity. Typi-

cal PCB layout guidelines for power applications

should be followed. These include separate power

ground planes, supply decoupling capacitors close to

the IC, short connections and use of maximized copper

areas to improve thermal dissipation.

Motor Current

in Phase 1

Motor Current

in Phase 2

I01

I11

PHASE1

I02

I12

PHASE2

Full-Step

12

34

Half-Step

12 3

45 6 7 8

Modified Half-Step

12 3

45 6 7 8

+500 mA

-500 mA

+500 mA

-500 mA

+333 mA

-333 mA

+167 mA

-167 mA

0

0

5V

Micro-Stepping (1/8th)

5V

5V

1...

...32

0V

0V

5V

5V