SLA7027MU datasheet(6/7 Pages) SANKEN

Numer części	SLA7027MU

Szczegółowy opis	2-Phase Stepper Motor Unipolar Driver ICs

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Producent	SANKEN [Sanken electric]

Strona internetowa	http://www.sanken-ele.co.jp/en

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25

SLA7027MU/SLA7024M/SLA7026M

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

Thermal characteristics

Fig. 7 Heat dissipation per phase PH vs. Output current IO

SLA7027MU

SLA7024M

1.2

1

0.8

0.6

0.4

0.2

0

0.2

0.4

0.6

0.8

1.0

Output current IO (A)

36V

24V

15V

VC

C =44V

Motor : 23LM-C202

Holding mode

Output current IO (A)

Motor : 23LM-C004

Holding mode

0

0.2

0.4

0.6

0.8

1.0

1.2

1.0

0.8

0.6

0.4

0.2

0

VC

C =

44V

36V

24V

15V

Motor : 23PM-C503

Holding mode

4.0

3.0

2.0

1.0

0

1.0

2.0

3.0

Output current IO (A)

SLA7026M

SLA7027MU

35

30

25

20

15

10

5

0

200

500

1K

Motor : PH265-01B

Motor current IO=0.8A

Ta=25

°C

VCC=24V, VS=24V

2-phase excitation

Response frequency (pps)

Without heatsink

Natural cooling

TC ( 4 pin)

30

25

20

15

10

5

0

200

500

1K

Motor : PH265-01B

Motor current IO=0.8A

Ta=25

°C

VCC=24V, VS=24V

2-phase excitation

Response frequency (pps)

Without heatsink

Natural cooling

TC ( 4 pin)

50

40

30

20

10

0

100

500

1K

5K

Response frequency (pps)

Without heatsink

Natural cooling

Motor : 23PM-C705

Motor current IO=1.5A

Ta=25

°C

VCC=24V, VS=24V

2-phase excitation

TC( 4 pin)

SLA7024M

SLA7026M

Fig. 8 Temperature rise

∆T

j

1

02

3

4

5

∆T

C

Natural cooling

Without heatsink

150

100

50

0

Total Power (W)

sThermal Design

An outline of the method for calculating heat dissipation is shown be-

low.

(1) Obtain the value of PH that corresponds to the motor coil current

IO from Fig. 7 "Heat dissipation per phase PH vs. Output current IO."

(2) The power dissipation Pdiss is obtained using the following formula.

2-phase excitation: Pdiss

≅ 2PH+0.015×VS (W)

1-2 phase excitation: Pdiss

≅

PH+0.015

×VS (W)

(3) Obtain the temperature rise that corresponds to the calcu-

lated value of Pdiss from Fig. 8 "Temperature rise."

3

2

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