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STK672-732A-E View Datasheet(PDF) - ON Semiconductor

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Description
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STK672-732A-E Datasheet PDF : 19 Pages
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Usage Notes
STK672-732A-E
1. Input signal functions and timing
[ENABLE, power on reset, and 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.
Control IC power (VDD) rising edge
4V typ
3.8V typ
Control IC power on reset
RESETB signal input
ENABLE signal input
No time specification
φA to φBB signal
No time specification
No time specification
ENABLE, φA to φBB Signals Input Timing
[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 the φA to φBB signal used for motor rotation suddenly stops, the motor shaft may advance beyond the control
position due to inertia. A SLOW DOWN setting where the φA to φBB cycle gradually decreases is required in order to
stop at the control position.
No. A1590-9/19
 

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