STK672-740A-E

No. A1136-6/19

[Smoke Emission Precuations]

If Pin 18 (S.G terminal) is attached to the PCB without using solder, overcurrent may flow into the MOSFET at

VCCON (24V ON), causing the STK672-740A-E to emit smoke because 5V circuits cannot be controlled.

In addition, as long as one of the output Pins, 1, 3, 5, or 7, is open, inductance energy stored in the motor results in

electrical stress on the driver, possibly resulting in the emission of smoke.

Input Pin Functions

Pin Name

Pin No.

Function

Input Conditions When Operating

φA

13

Pin 5, phase A output

φAB

17

Pin 7, phase AB output

φB

12

Pin 3, phase B output

φBB

10

Pin 1, phase BB output

Low active (with a function to prevent simultaneous

ON of

φA and φAB, or φB and φBB)

RESETB

14

System reset

A reset is applied by a low level

ENABLE

15

A, AB, B, and, BB outputs cut off

A, AB, B, and BB outputs are cut off by a low level

Output Pin Functions

Pin Name

Pin No.

Function

Input Conditions When Operating

FAULT

16

Monitor pin used when over-current detection or overheat

detection function is activated.

Low level is output when detected.

Note: See the timing chart for the concrete details on circuit operation.