SLA7029 datasheet(6/7 Pages) SANKEN

Part #	SLA7029

Description	2-Phase Stepper Motor Unipolar Driver ICs

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Manufacturer	SANKEN [Sanken electric]

Direct Link	http://www.sanken-ele.co.jp/en

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SLA7022MU/SLA7029M/SMA7022MU/SMA7029M

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

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)

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)

Thermal characteristics

SLA7022MU

SLA7029M

SMA7022MU

SMA7029MU

sThermal Design

An outline of the method for calculating heat dissipation is shown below.

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

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

put current IO."

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

VCC

=44V

36V

24V

15V

∆T

j

1

02

3

4

∆T

C

Natural cooling

Without heatsink

150

100

50

0

Total Power (W)

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

Fig. 8 Temperature rise

(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."

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

∆T

j

1

02

3

4

5

∆T

C

Natural cooling

Without heatsink

150

100

50

0

Total Power (W)

SLA7022MU, ASMA7022MU

SLA7000M series

SLA7029M, SMA7029M

SMA7000M series

3

2

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SLA7029 Datasheet(PDF) 6 Page - Sanken electric

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