STK472-422A-E Ver la hoja de datos (PDF) - ON Semiconductor

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STK472-422A-E

Thick-Film Hybrid IC 2-phase Stepping Motor Driver

ON Semiconductor 

STK672-442A-E

[Vref (Voltage setting to be used for the current setting reference)]

• Pin type: Analog input configuration, input pull-down resistor 100kΩ

Input voltage is in the voltage range of 0.2V to 1.8V.

[Input timing]

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

4Vtyp

3.8Vtyp

Control IC power on reset

RESETB signal input

ENABLE signal input

No time specification

CLOCK signal input

At least 10μs

At least 10μs

ENABLE, CLOCK, and RESETB Signals Input Timing

[Configuration of control block I/O pins]

<Configuration of the MODE1, MODE2, MODE3, CLOCK,

CWB, ENABLE, and RESETB input pins>

<Configuration of the FAULT2 pin>

Input pin

10kΩ

100kΩ

5V

Output pin

Pin 8

VSS

5V

50kΩ

50kΩ

50kΩ Overcurrent

Thermal shutdown

The input pins of this driver all use Schmitt input. Typical specifications at Tc=25°C are given below. Hysteresis

voltage is 0.3V (VIHa-VILa).

When rising

1.8Vtyp

Input voltage

VIHa

When falling

1.5Vtyp

VILa

No.A1587-11/21

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