STK672-630A-E 查看數據表（PDF） - ON Semiconductor

零件编号

产品描述 (功能)

生产厂家

STK672-630A-E

Thick-Film Hybrid IC 2-phase Stepping Motor Driver

ON Semiconductor 

Usage Notes

STK672-630A-E

1. STK672-630A-E, STK672-640A-E input signal functions and timing

[ENABLE, CLOCK and power on reset, RESETB (Input signal timing when power is first applied)]

The control IC of the driver is equipped with a power on reset function capable of initializing internal IC operations

when power is supplied. A 4V typ setting is used for power on reset. Because the specification for the MOSFET gate

voltage is 5V±5%, conduction of current to output at the time of power on reset adds electromotive stress to the

MOSFET due to lack of gate voltage. To prevent electromotive stress, be sure to set ENABLE=Low while VDD,

which is outside the operating supply voltage, is less than 4.75V.

In addition, if the RESETB terminal is used to initialize output timing, be sure to allow at least 10μs until CLOCK

input.

Control IC power (VDD) rising edge

4V typ

3.8V typ

Control IC power on reset

RESETB signal input

No time specification

ENABLE signal input

CLOCK signal input

At least 10μs

At least 10μs

ENABLE, CLOCK, and RESETB Signals Input Timing

[CLOCK (Phase switching clock)]

• Input frequency: DC to 50kHz

• Minimum pulse width: 10μs

• MODE2=1(High) Signals are read on the rising edge.

• MODE2=0(Low) Signals are read on the rising and falling edges.

[CWB (Motor direction setting)]

The direction of rotation is switched by setting CWB to 1 (high) or 0 (low).

See the timing charts for details on the operation of the outputs.

Note: The state of the CWB input must not be changed during the 6.25μs period before and after the rising edge of the

CLOCK input.

[ENABLE (Forcible on/off control of the A, AB, B, and BB outputs, and hybrid IC internal operation)]

ENABLE=1: Normal operation

ENABLE=0: Outputs A, AB, B, and BB forced to the off state.

If, during the state where CLOCK signal input is provided, the ENABLE pin is set to 0 and then is later

restored to the 1 state, the IC will resume operation with the excitation timing continued from before the

point ENABLE was set to 0.

If sudden stop is applied to the CLOCK signal used for motor rotation, the motor axis may advance beyond the

theoretical position due to inertia. To stop at the theoretical position, the SLOW DOWN setting for gradually slowing

the CLOCK cycle is required.

No. A1129-11/21

Share Link: