Datasheet SI-7300A Datasheet (Sanken Electric Co)

Unipolar Driver ICs

SI-7300A and SI-7330A

■ Ratings

(Ta = 25°C)

Absolute Supply voltage Output Junction Operating Storage

maximum current temperature ambient temperature

rating (V) (A) (°C) temperature (°C) (°C) Type No. VCC1 VCC2 Io Tj Top Tstg SI-7300A 48 8 1.7 +125 –20 to +80 –30 to +100 SI-7330A 42 8 3.2 +125 –20 to +80 –30 to +100

■ Characteristics

Electrical Supply voltage Output current VCC2 input Oscillation External Input excitation signal (active high)

charac- current frequency zener diode Input voltage (V) High level input current (mA)

teristics breakdown Low High Io= Io= Io= Io=

voltage level level 0.5A/ø 1.0A/ø 1.5A/ø 3.0A/ø

(V) (mA/ø) (mA) (kHz) (V) (OFF) (ON)

VCC1 VCC2 IO IOM*lCC2 FVZ VIL VIH lIH lIH lIH lIH

Type No. min typ SI-7300A 15 30 42 4.5 5 5.5 200 SI-7330A 15 30 35 4.5 5 5.5 200

max

min typ

max

min

max

min typ

max

max min typ max min max max typ min

1500

535 580 625 45 19 21 25

3000

535 580 625 45 19 21 25 V

max

min

CC1

V

70 0.8 2.8 2.2

+5

CC1

43 0.3 1.8 5 100 15 100 40 100

10.0

3.0

* Measurement conditions are as shown in the external connection diagram.

■ Block diagram

SI-7300A

Auxiliary power supply VCC2

Reference

voltage

Comparator

amplifier

Current

controller

Main power

CC1

supply V

Zener diode for cancelling counter EMF

ZD

max

10.0

min

4.9

max

10.0

(Ta = 25°C)

min

max

RX

Trigger pulse

generator

circuit

Excitation signal

(4-phase)

Rx : Variable current resistor

■ External connection diagram

SI-7300A

Excitation signal input (active low)

(Open collector)

CC2

V

TD62302P

(Toshiba)

PD

+

2.2µF 10V

1 2

3 4

510Ω×4

9

16 15

14 13

8

10k

2SC2002

Rx

A B

114

4 10

6

SI-7300A

12

2

18 16 3 13

15

17

11

RSAR

ZD

8

IO

ABA

5 7

IO

9

SB

B

I

OM measurement conditions

V

CC1 = 30V

VCC2 = 5V R

SA, RSB = 1.8Ω

RX : Open SPM : Rm = 3.6Ω/ : Lm = 9.0mH/ ZD : V

Z = 60V

Excitation

signal

amplifier

+

µ

100 F 50V

SPM

V

Current detection resistor Rs

CC1

F.C

signal input (active low)

φ

Counter EMF

canceller

SI-7330A

VCC2

Excitation

TD62302P

(Open collector)

PD

(Toshiba)

+

µ

2.2 F 10V

A

1

B

2

A

3

B

4

M

VCC1

+

A ZDB

ZD

82Ωx4

9

16 15

14 13

8

10kΩ

RX

A

13

B

8

A

9

B

4

2

11611

18

12

SI-7330A

10 15

31417 19 20

RSAR

6

IO

7 5

SB

100µF 50V

F.C

AA

SPM

BB

I

OM measurement conditions

V

CC1 = 30V

VCC2 = 5V R

SA, RSB = 1.8Ω

RX : Open SPM : Rm = 3.6Ω/ : Lm = 9.0mH/ ZD : V

Z = 43V

φ

29

SI-7300 and SI-7330A

■ Equivalent circuit diagram

SI-7300A

R

16

R

R8R

R

6

+ –

2

10

4

Q

R

14

R

Q

1

17

D

1

16

11

D7D8D9D

9

3D4

D

10

Q3Q

4

12

13

R

9

R3R

Q

R

13

R

11

7

R

15

R

5

+ –

2

D5D

Q

5

R

10

8

12

Q

2

D

2

6

Q

6

Trigger pulse

generator circuit

■ External dimensions

21.6

±0.5

••••

Plastic package

4.5

P=2.54

14

15

8

5 7

6

4

3

SI-7300A

±0.5

65.0

±0.4

59.0

φ

2 – 4.5

±0.5

30.0

±1

Type No.

Lot No.

8.6

±0.5

21.6

Pin No. 1 18

•••••

SI-7330A Plastic package

±0.5

69.0

±0.4

63.0

(Unit: mm)

7.8

7

3.8

2.5

±0.5

7.0

3.5

±0.3

0.5

1

16.6

±0.5

35.0

±1

18

8.6

Pin No.

Type No.

Lot No.

12

8.0

φ

20

3.4

P=2.54

1.8 3.8

3

0.5

1.4

SI-7330A

Q

10

R

1

Q

1

R

18 19

11 10 12

D

3

9

Q3Q

26

D

1

D

7

8D9

D

4

Q

11

R

2

R

27

D

10

D

5

Q5Q 13 14

R3R

R

9

Q

7

R

11

R

13

2

7

R

R8R

5

R

15

+

–

R

16

R

4

Q

R

8

6

R

14

R

12

■ Case temperature vs. Output

current

SI-7300A

1.2

VCC1 = 30V VCC2 = 5V Motor Rm = 3.6Ω/ Lm = 9.0mH/

1.1

1.0

0.9 0

Output current Io (A)

Case temperature T

C (°C)

2

10

Q

2

D

6

φ

16

15 17

6 7 5

6

8

4 3 1

Trigger pulse

generator circuit

20

φ

100806040200

■ Supply voltage vs. Output current

SI-7300A

1.6

1.4

1.2

φ

(A/ )

1.0

O

0.8

0.6

Output current I

0.4

0.2

0

0202428323640

Supply voltage V

V

CC2

=5V Motor 23PM-C108 Rm=3.6Ω/ Lm=9.0mH/

CC

(V)

■ Case temperature vs. Chopping

frequency

SI-7300A

24

V

CC1

= 30V V

CC2

23

= 5V Motor Rm = 3.6Ω/ Lm = 9.0mH/

22 21

0

Chopping frequency F(KHz)

Case temperature Tc (°C)

φ φ

φ

100806040200

30

SI-7300 and SI-7330A Application Note

■ Determining the output

current IO (motor coil current)

The output current, lo is fixed by the following circuit elements:

RS : Current detection resistor VCC2 : Supply voltage

RX : Variable current resistor To operate a motor at maximum current level, set Rx = infinity (open). Based on the specifications of SI-7300A, its output current lo can be seen as:

lo (rms value): 535 to 625 mA To compute lo when different values are used for Rs and VCC2, use the approximation formula below. The maximum ripple value IOH of the output current waveform can be computed as follows:

1

.

OH(max) = (0.233•VCC2–0.026) [A]

l

l The graph of this equation is shown below.

.

S

R

1

OH(min) = (0.214•VCC2–0.021) [A]

. .

RS

I

OH

Waveform of output current

■ Power down mode

The SI-7300A can be operated in power down mode. The circuit is shown below. When transistor Tr is switched on, the reference voltage drops and the output current can be decreased.

2

SI-7300A Output current I

1.6

1.4

1.2

(A)

OH

1.0

0.8

0.6

Output current I

0.4

0.2 0

Rx

Variable current resistor Rx (kΩ)

SI-7300A

Tr

OH

vs. Variable current resistor R

max Rs = 0.7Ω

min

max Rs = 1Ω

min

X

43201

SI-7300A Output current IOH vs. Current detection resistor Rs

1.6

1.4

1.2

(A)

OH

1.0

0.8

0.6

Output current I

0.4

0.2

0

SI-7330A Output current I

3

(A)

2

OH

1

Output current I

0

Current detection resistor Rs (Ω)

max V

CC2

Rs Rs

CC2

1 1

=5V

(0.233V (0.214V

min V

OH

vs. Current detection resistor Rs

I

OH(max)

I

OH(min)

CC2

–0.026) –0.021)

SI-7330A Output current IOH vs. Variable current resistor R

3

(A)

OH

2

1

Output current I

0

Variable current resistor Rx (kΩ)

43201

■ Example of a Frequency vs.

Rs = 0.3Ω

Rs = 0.8Ω

I

OH(max)

I

OH(min)

Rx : kΩ

*

1Rs1.131

4.843+

1Rs1.107

5.165+

4.9 Rx

5.1 Rx

X

V

CC2

– 0.026

V

CC2

– 0.021

43201

Torque characteristic

The graph shows the relationship between frequency and pull-out torque of SI-7300A.

43201

SI-7300A Pull-out torque τout

vs. Response frequency

5

4

out (kg-cm)

3

τ

Motor

2

23PM-C108

CC1

=30V

V

φ

I

O

=1.2A/

(Fixed)

1

Pull-out torque

2-phase excitation V

Z

=60V

0

500 1000 5000

Response frequency f (pps)

31

SI-7300A and SI-7330A Application Note

■ Thermal design

The procedures for the thermal design of the SI-7300A are as follows: (1) As shown in the right figure, the supply current ICC1 and

the output current lo are measured at the maximum level of the supply voltage VCC1. However, the motor is in holding mode at the 2-phase excitation.

(2) From the above measurements, the internal power dis-

sipation (2 phases) of the hybrid IC can be obtained through the following formula.

Pdiss = V

CC1 • ICC1 – 2Io

Where RL: coil resistance of the motor per phase

Shown in the lower graphs are sample calculations of Pdiss vs. Io.

(3) The heatsink area corresponding to the ambient tem-

perature can be obtained from the SI-7300A derating curve shown in the lower right.

(4) Verify that the temperature of the aluminum base plate

of the hybrid IC or adjacent heatsinks is below 85°C (equivalent to max. ambient temperature) when operating under actual conditions.

* For details on thermal design, refer to the technical

data.

2

(RL + RS)

Method for measuring current SI-7300A

CC2

V

+

2.2 F

µ

10V

510Ω×4

Excitation

signal input

(Active low)

(Open collector)

TD62302P

(Toshiba) PD

9

16

1

15

2

14

3

13

4

8

10k

Ω

Rx

2SC2002

A B

4 10

6 12

2

18 16 3 13

A

114

SI-7300A

RSAR

V

CC1

I

CC1

8

15

5 7

17

9

11

SB

+

µ

100 F

ZD

50V

I

O

A

ABA

SPM

B

SI-7300A Heat dissipation per phase vs. output current

9 8 7 6 5 4 3 2 1

0

Heat dissipation per phase Pdiss (W)

0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Output current Io (A/ )

SI-7330A Heat dissipation per phase vs. output current

16

14

12

10

8

6

4

2

0

Heat dissipation per phase Pdiss (W)

Output current Io (A/ )

1

VCC1 1 40V

2 30V 3 20V

Motor

φ

3.6

Ω

/ 9.0mH/ No load Excitation signal 1-phase, holding mode

φ

Condition V

CC2

=5V 1-phase, holding mode Motor

φ

Rm=0.85

Ω

/

φ

Lm=1.45mH/

φ

3

3.53.02.52.01.51.00.50

SI-7300A Derating curve

2

φ

28

24

20

16

12

8

Internal heat dissipation Pdiss (W)

4

0

SI-7300A Aluminium heatsink Using silicone grease Unit : mm

100×150×2

100×100×2

100×50×2

No heatsink

100×200×2

Ambient temperature Ta (°C)

SI-7330A Derating curve

30

25

20

15

10

Internal heat dissipation Pdiss (W)

5

806040200

0

No heatsink

Ambient temperature Ta (°C)

SI-7300A Aluminium heatsink Using silicone grease Unit : mm

100×200×2

100×150×2

100×100×2

100×50×2

806040200

32

SI-7200M, SI-7230M, SI-7115B, SI-7300A, SI-7330A, SI-7500A and SI-7502

Handling Precautions

(Note: The SI-7502 is applicable for item (2) only.)

For details, refer to the relevant product specifications. (1) Tightening torque:

The torque to be applied in tightening screws when mounting the IC on a heatsink should be below 49N•m.

(2) Solvent:

Do not use the following solvents:

Substances that Chlorine-based solvents : Trichloroethylene, dissolve the package Trichloroethane, etc.

Aromatic hydrogen compounds : Benzene, Toluene,

Xylene, etc.

Ketone and Acetone group solvents

Substances that Gasoline, Benzine and Kerosene weaken the package

(3) Silicone grease:

The silicone grease to be used between the aluminum base plate of the hybrid IC and the heatsink should be any of the following:

• G-746 SHINETSU CHEMICAL INDUSTRIES CO., LTD.

• YG6260 TOSHIBA SILICONE CO., LTD.

• SC102 DOW CORNING TORAY SILICONE CO., LTD. Please pay sufficient attention in selecting silicone grease since oil in some

grease may penetrate the product, which will result in an extremely short product life.

Others

• Resistance against radiation Resistance against radiation was not considered in the development of these ICs because it is assumed that they will be used in ordinary environment.

54