SDK03M datasheet(5/6 Pages) SANKEN

No. de pieza	SDK03M

Descripción Electrónicos	2-Phase Stepper Motor Unipolar Driver ICs

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Fabricante Electrónico	SANKEN [Sanken electric]

Página de inicio	http://www.sanken-ele.co.jp/en

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5 / 6 page

40

SDK03M

2-Phase Stepper Motor Unipolar Driver ICs (2-Phase/1-2 Phase Excitation)

60

50

40

30

20

10

0

2

4

6

8

10 12

14

16

15

20

25

30

35

40

Motor coil resistance Rm (

Ω)

VCC

=2

4V

VCC

=36V

TOFF =12 s

RS =1

Ω

Lm

=1~3ms

Rm

=

r3

C1

r4

C2

47k

Ω

500pF

µ

Fig. 6 Chopper frequency vs. Motor coil resistance

sDetermining the chopper frequency

Determining TOFF

SDK03M is self-excited choppers. The chopping OFF time TOFF

is fixed by r3/C1 and r4/C2 connected to terminal Td.

TOFF can be calculated using the following formula:

The circuit constants and the TOFF value shown below are rec-

ommended.

TOFF = 12

µs at r3=47kΩ, C1=500pF, Vb=5V

sChopper frequency vs. Supply voltage

sChopper frequency vs. Output current

0

VCC (V)

50

40

30

20

10

0

10

20

30

40

50

Motor : 23LM-C202

IO = 0.8A at VCC=24V

RS=1

Ω

0

IO (A)

50

40

30

20

10

0

0.2

0.4

0.6

0.8

1.0

Motor : 23LM-C202

VCC=24V

RS=1

Ω

TOFF

≅−r3 • C1 n (1−

=

−r4 • C2 n (1−

)

rr

2

Vb

2

Vb

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