STK672-732B-E

No. A1931-10/23

[Configuration of Each Input Pin]

<Configuration of the

φA, φAB, φB, φBB,

<Configuration of the FAULT2 pin>

ENABLE, and RESETB input pins>

(The buffer has an open drain configuration.)

All input pins of this driver support schmitt input. Typ specifications at Tc = 25

°C are given below. Hysteresis voltage

is 0.3V (VIHa-VILa).

Input voltage specifications are as follows.

VIH=2.5V min

VIL=0.8V max

<Configuration of the Vref input pin>

<Configuration of the FAULT1 output pin>

<FAULT1, FAULT2 output>

FAULT1 Output

FAULT1 is an open drain output. It outputs low level when any of motor terminal open, overcurrent, or overheat is

detected.

FAULT2 output

Output is resistance divided (3 levels) and the type of abnormality detected is converted to the corresponding output

voltage.

• Motor terminal open: 10mV (typ)

• Overcurrent: 2.5V (typ)

• Overheat: 3.3V (typ)

Abnormality detection can be released by a RESETB operation or turning VDD voltage on/off.

VIHa

When rising

When falling

1.5V typ

VILa

1.8V typ

Input voltage

Input pin

5V

VSS

10k

Ω

100k

Ω

5V

Overcurrent

Overheating

50k

Ω

50k

Ω

Output pin

Pin 8

50k

Ω

Motor terminal open

Vref/4.9

VSS

Amplifier

−

+

Input pin

Pin 19

Output pin

Pin 16

5V

VSS

Overcurrent

Motor terminal open

Overheating