Fig.5. LS8293 APPLICATION FOR TWO PHASE MOTOR USING TWO SEPARATE DRIVERS

uC

M0

M1

DCYM

RESET/

STEP/

FWD

EN/

INH1/

PHA

PHB

Rb

Cb

Rd

Cd

TBLNK

TDCYD

+5V

+5V

5MHz

10MΩ

Cm

Cm

XTLO

XTLI

LS8293

1

2

3

4

5

6

7

9

10

20

21

EN

IN1

IN2

DGND

L6201

L6202

L6203

VDD

28

27

25

24

+Vm

Vs

O1

O2

+5V

Ru

Cu

TDCYU

13

+5V

Rh

Ch

+5V

14

THLD

BOOT1

15nF

15nF

BOOT2

220nF

VREF

L6201

L6202

L6203

+Vm

Vs

O1

O2

BOOT1

15nF

15nF

BOOT2

220nF

VREF

EN

IN1

IN2

INH2/

PHC

PHD

26

23

22

GND

GND

AGND

SENSE2

SENSE1

19

18

11

17

Vr

Vrh

17

18

Vref

Vrefh

8292-021811-7

NOTE2. Cm is chosen according to following relation:

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

NOTE1. All functional options have been implemented in this application. If all options are not used, following components can be deleted:

~Rd, Ru, Cd and Cu: if no mixed-decay mode id selected.

~Rh and Ch: if holding torque is not selected. In this case Vrefh pin is tied to GND.