STK672-432A-E Sanyo Semicon Device, STK672-432A-E Datasheet - Page 11

• Manufacturer Part Number: STK672-432A-E
• Description: 2-phase Stepping Motor Driver
• Manufacturer: Sanyo Semicon Device

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[Vref (Voltage setting to be used for the current setting reference)]
• Pin type: Analog input configuration, input pull-down resistor 100kΩ
[Input timing]
[Configuration of control block I/O pins]
<Configuration of the MODE1, MODE2, MODE3, CLOCK,
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).
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 V DD ,
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.
CWB, ENABLE, and RESETB input pins>
Input voltage is in the voltage range of 0.14V to 1.48V.
Input pin
Control IC power (V DD ) rising edge
Control IC power on reset
RESETB signal input
ENABLE signal input
CLOCK signal input
Input voltage
When rising
1.8Vtyp
100k Ω
10k Ω
ENABLE, CLOCK, and RESETB Signals Input Timing
VIHa
At least
STK672-432A-E
V SS
5V
10 μ s
4Vtyp
Output pin
Pin 8
At least
<Configuration of the FAULT2 pin>
50k Ω
50k Ω
50k Ω
5V
No time specification
10 μ s
Thermal shutdown
Overcurrent
3.8Vtyp
When falling
VILa
1.5Vtyp
No.A1586-11/21
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