Fig 6. TYPICAL APPLICATION FOR FOUR PHASE UNIPOLAR MOTOR USING DISCRETE MOSFETS

uC

M0

M1

RESET/

STEP/

FWD

EN/

Rb

Cb

TBLNK

+5V

5MHz

10MΩ

Cm

Cm

XTLO

XTLI

LS8292

1

2

4

5

6

7

9

10

17

DGND

VDD

24

21

23

20

+Vm

+5V

R

AGND

11

13

Vr

12

Vref

NOTE 4. Cm is chosen according to following relation:

Cm = 2(Cl – Cp) – 10pF, where Cl = Crystal load capacitance and Cp = parasitic capacitance

NOTE 1. This design can operate in the Slow-decay mode only.

PHA

INH1/

PHB

Q1

Q2

SENSE1

15

22

18

Q3

Q4

14

PHC

INH2/

PHD

SENSE2

19

R

74HC08

74HC08

D

D

D

D

+Vm

DCYM

+5V

3

TDCYD 16

8292-021811-8

NOTE 2. Q1, Q2, Q3 and Q4 are power MOSFETS suitable for 5V gate drive. Typical part numbers: IRLZ44N and IRF3708

NOTE 3. For higher pre-drive capability, 74HC08 can be replaced with MIC4468