• The CLK input pin include built-in malfunction

prevention circuits for external pulse noise.

• Both an ENABLE and RESET pin are provided as

Schmitt trigger inputs with built-in 20 k

Ω (typical) pull-

up resistors.

• No audible noise is generated by the differences in the

time constant between phases A and B when the motor

position is held fixed due to the adoption of external

excitation.

• The reference voltage Vref can be set to any level

to provide microstepping operation even for small motor

currents.

<Driver Block>

• Provides a wide range of operatng supply voltage

to 45 V).

• Current detection resistor (0.15

Ω) built-in the hybrid IC

itself.

• Power MOSFETs adopted for low drive loss

(When Tc = 105°C).

No. 6507-2/17

STK672-080

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage1

No signal

52

V

Maximum supply voltage2

No signal

–0.3 to +7.0

V

Input voltage

Logic input pins

–0.3 to +7.0

V

Phase output current

3.3

A

Repeatable avalanche current

Ear max

30

mJ

Power loss

Pd max

θc-a = 0

8

W

Operating substrate temperature

Tc max

105

°C

Junction temperature

Tj max

150

°C

Storage temperature

Tstg

–40 to +125

°C

Specifications

Absolute Maximum Ratings at Tc = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage1

With input signals present

10 to 45

V

Supply voltage2

With input signals present

5 ±5%

V

Input voltage

V

Phase driver voltage handling

Tr1, 2, 3, and 4 (the A, A, B, and B outputs)

100 (min)

V

Phase current 1

Tc = 105°C, CLK

≥ 200 Hz

2.8

A

Phase current 2

Tc = 80°C, CLK

≥ 200 Hz

3

A

Allowable Operating Ranges at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

min

typ

max

Control supply current

Pin 6 input, with ENABLE pin held low.

2.1

14

mA

Output saturation voltage

Vsat

0.65

1

V

Average output current

Io ave

Load: R = 3.5 W/L = 3.8 mH per phase

0.445

0.5

0.56

A

FET diode Forward voltage

Vdf

If = 1 A

1

1.5

V

[Control Inputs]

Input voltage

Except for the Vref pin

4

V

Except for the Vref pin

1

V

Input current

Except for the Vref pin

0

1

10

µA

Except for the Vref pin

125

250

510

µA

[Vref Input Pin]

Input voltage

Pin 7

0

2.5

V

Input current

Pin 7, 2.5-V input

330

415

545

µA

[Control Outputs]

Output voltage

I = –3 mA, pin MOI

2.4

V

I = +3 mA, pin MOI

0.4

V

Continued on next page.

Continued from preceding page.