SI-7321M datasheet(4/19 Pages) SANKEN

No de pièce	SI-7321M

Description	Unipolar 2-Phase Microstepping Motor Driver IC

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Fabricant	SANKEN [Sanken electric]

Site Internet	http://www.sanken-ele.co.jp/en

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SANKEN ELECTRIC CO., LTD.

Unipolar 2-Phase Microstepping Motor Driver IC

SI-7321M

28210.05

STEPPING CHARACTERISTICS valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Step Reference Current Ratio

Mode F

VREF = VRSx = 100 %, VREF = 0.04 to 1.5 V

–

100.0

–

%

Mode E

–

98.1

–

%

Mode D

–

95.7

–

%

Mode C

–

92.4

–

%

Mode B

–

88.2

–

%

Mode A

–

83.1

–

%

Mode 9

–

77.3

–

%

Mode 8

–

70.7

–

%

Mode 7

–

63.4

–

%

Mode 6

–

55.5

–

%

Mode 5

–

47.1

–

%

Mode 4

–

38.2

–

%

Mode 3

–

29.0

–

%

Mode 2

–

19.5

–

%

Mode 1

–

9.8

–

%

Sleep-Enable Recovery Time

tSE

Sleep1 and Sleep2 modes

100

–

μs

Switching Time

tcon

Measured from Clock edge to output on

–

2.0

–

μs

tcoff

Measured from Clock edge to output off

–

1.5

–

μs

PWM Minimum On-Time

ton(min)

B_SEL = low

–

1.8

–

μs

B_SEL = high

–

3.6

–

μs

PWM Off-Time

toff1

Current ratio modes 8 through F

–

13

–

μs

toff2

Current ratio modes 4 through 7

–

9.5

–

μs

toff3

Current ratio modes 1 through 3

–

7.5

–

μs

Load Disconnection

Undetected Time

topp

Measured from PWM off

1.5

2

2.5

μs

Temperature Increase Relationship

140

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

120

100

80

60

40

20

0

∆TC-A = 20 x PD

∆TJ-A = 35.7 x PD

Maximum Allowable Power Dissipation, P

D(max) (W)

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