NJM3773FM2 Datasheet NJM3773FM2, NJM3773D2 | P4-P6

NJM3773

■ ABSOLUTE MAXIMUM RATINGS

Parameter Pin no. [DIP] Symbol Min Max Unit

Voltage

Logic supply 12 V

CC

07 V

Motor supply 4, 19 V

MM

045V

Logic inputs 9, 10, 13, 14 V

I

-0.3 6 V

Analog inputs 7, 8, 15, 16 V

A

-0.3 V

CC

V

Current

Motor output current 1, 3, 20, 22 I

M

-850 +850 mA

Logic inputs 9, 10, 13, 14 I

I

-10 - mA

Analog inputs 7, 8, 15, 16 I

A

-10 - mA

Temperature

Operating junction temperature T

j

-40 +150 °C

Storage temperature T

stg

-55 +150 °C

Power Dissipation (Package Data)

Power dissipation at T

GND

= +25°C, DIP and PLCC package P

D

-5W

Power dissipation at T

GND

= +125°C, DIP package P

D

- 2.2 W

Power dissipation at T

GND

= +125°C, PLCC package P

D

- 2.6 W

■ RECOMMENDED OPERATING CONDITIONS

Parameter Symbol Min Typ Max Unit

Logic supply voltage V

CC

4.75 5 5.25 V

Motor supply voltage V

MM

10 - 40 V

Output emitter voltage V

E

- - 1.0 V

Motor output current I

M

-750 - +750 mA

Operating junction temperature T

J

-20 - +125 °C

Rise and fall time logic inputs t

r,

, t

f

--2µs

Oscillator timing resistor R

T

21220kΩ

Figure 5. Definition of terms

Figure 4. Definition of symbols

I I

M OL

I

CC

I I I

I IH IL

I

A

4 700 pF

V

CC

V

I

IH

IL

V

A

R

V

C

A

I

C

A

V

E

V

MM

R

S

R

T

12 k‰

I

MM

RC

NJM3773

19

11

12

M

A1

M

B1

M

B2

M

A2

GNDC

2

V

R2

Phase

2

V

CC

C

1

V

R1

Phase

1

E

1

E

2

V

CC

22

20

14

15

S

R

Q

16

5, 6, 17, 18

+

—

Logic

21

S

R

Q

+

—

Logic

+

—

4

1

3

2

87

9

V

MM2

V

MM1

Dis

1

10

Dis

13

2

C

T

I

C

V

RC

I

RC

V

MA

V

M

R

B

Pin no. refers

to DIP package

V

R

t

d

t

50 %

t

on

t

off

| V – V |

MA MB

t

V

RC

t

b

V ( I )

E

M

f =

s

t

on

t

off

+

1

D =

t

on

off

+

t

on

NJM3773

■ ELECTRICAL CHARACTERISTICS

Electrical characteristics over recommended operating conditions, unless otherwise noted. -20°C ≤ T

j

≤ +125°C.

Parameter Symbol Conditions Min Typ Max Unit

General

Supply current I

CC

V

R

=500mV. Note 4. - 55 70 mA

Supply current I

CC

Dis

1

= Dis

2

= HIGH. - 7 10 mA

Total power dissipation P

D

V

MM

= 24 V, I

M1

= I

M2

= 500 mA. - 2.0 2.3 W

Notes 2, 3, 4.

Total power dissipation P

D

V

MM

= 24 V, I

M1

= 700 mA, I

M2

= 0 mA. - 1.7 2.0 W

Notes 2, 3, 4.

Thermal shutdown junction temperature - 160 - °C

Turn-off delay t

d

T

A

= +25°C, dV

C

/dt ≥ 50 mV/µs, - 1.1 2.0 µs

I

M

= 100 mA. Note 3. (one channel on).

Logic Inputs

Logic HIGH input voltage V

IH

2.0 - - V

Logic LOW input voltage V

IL

- - 0.6 V

Logic HIGH input current I

IH

V

I

= 2.4 V - - 20 µA

Logic LOW input current I

IL

V

I

= 0.4 V -0.2 -0.1 - mA

Analog Inputs

Input current I

A

-0.5 -0.2 - µA

Threshold voltage V

C

V

R

= 500mV - 500 - mV

| V

C1

- V

C2

| mismatch V

C,diff

R

B

= 1 kohm. Note 3. - 1 - mV

Motor Outputs

Lower transistor saturation voltage I

M

= 500 mA - 0.4 0.8 V

Lower transistor leakage current V

MM

=41 V,T

A

= +25°C. Dis

1

= Dis

2

= HIGH. - - 100 µA

Lower diode forward voltage drop I

M

= 500 mA - 1.1 1.3 V

Upper transistor saturation voltage I

M

= 500 mA. - 1.1 1.4 V

Upper transistor leakage current V

MM

=41 V,T

A

= +25°C. Dis

1

= Dis

2

= HIGH.

.

- - 100 µA

Upper diode forward voltage drop I

M

= 500 mA. - 1.1 1.4 V

Chopper Oscillator

Chopping frequency f

s

C

T

= 4 700 pF, R

T

= 12 kohm 21.5 23.0 24.5 kHz

Digital filter blanking time t

b

C

T

= 4 700 pF. Note 3. - 1.0 - µs

■ THERMAL CHARACTERISTICS

Parameter Symbol Conditions Min Typ Max Unit

Thermal resistance Rth

J-GND

DIP package. - 11 - °C/W

Rth

J-A

DIP package. Note 2. - 40 - °C/W

Rth

J-GND

PLCC package. - 9 - °C/W

Rth

J-A

PLCC package. Note 2. - 35 - °C/W

Rth

J-GND

SOP package - 13 - °C/W

Rth

J-A

SOP package - 42 - °C/W

Notes

1. All voltages are with respect to ground. Currents are positive into, negative out of specified terminal.

2. All ground pins soldered onto a 20 cm

2

PCB copper area with free air convection, T

A

= +25°C.

3. Not covered by final test program.

4. Switching duty cycle D = 30%, f

s

= 23.0 kHz.

NJM3773

■ APPLICATIONS INFORMATION

Current control

The regulated output current level to the motor winding is determined by the voltage at the reference input and the

value of the sensing resistor, R

S

. The peak current through the sensing resistor (and the motor winding) can be

expressed as:

I

M,peak

= V

R

/ R

S

[A]

With a recommended value of 0.5 ohm for the sensing resistor R

S

, a 0.25 V reference voltage will produce an output

current of approximately 500 mA. R

S

should be selected for maximum motor current. Be should not to exceed the

absolute maximum output current which is 850 mA. Chopping frequency, winding inductance and supply voltage

also affect the current, but to much less extent.

To improve noise immunity on the comparator inputs (V

R

and C), the control range may be increased to 0.5 V if R

S

is correspondingly changed to 1 ohm for a maximum output current of 500 mA.

For accurate current regulation, the sensing resistor should be a 0.5 - 1.0 W precision resistor, i. e. less than 1%

tolerance and low temperature coefficient.

Figure 7. Microstepping system where a microcontroller including DACs provides

analog current control voltages as well as digital signals to the NJM3773.

Micro-

controller

D/A

82 kΩ

+

4.7 µF

20 kΩ

2 700 pF

Phase

Dis

V

Phase

Dis

V

1

2

R1

R2

ECECGND

RC

M

A1

B1

A2

B2

V

CC

VV

MM1 MM2

+5 V

3

1

20

22

9

10

7

12 4 19

11

5, 6,

17, 18

215 21

8

11

2

R

S

R

S

14

13

16

STEPPER

MOTOR

V

MM

Pin numbers refer

to DIP package.

+

10 µ

F

0.1 µ

F

GND (V

)

0.1 µ

F

MM

GND (V )

CC

820 pF

0.68 Ω

1 kΩ 1 kΩ

0.68 Ω

820 pF

10 kΩ10 kΩ

1000

pF

1000

pF

V

CC

NJM3773

Figure 6. Typical stepper motor driver application with NJM3773.

Phase

Dis

V

Phase

Dis

V

1

2

R1

R2

ECECGND

RC

12 kΩ

4 700 pF

0.47 Ω

M

A1

B1

A2

B2

V

CC

VV

MM1 MM2

+5 V

3

1

20

22

9

10

7

12 4 19

11

5, 6,

17, 18

215 21

8

11

2

R

S

R

S

14

13

16

STEPPER

MOTOR

V

MM

Pin numbers refer

to DIP package.

+

10 µF

0.1 µF

GND (V )

GND (V

)

0.1

µF

MM

CC

V

CC

NJM3773

NJM3773FM2

NJM3773FM2

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