M54646AP Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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M54646AP

2-PHASE STEPPER MOTOR DRIVER

MITSUBISHI ELECTRIC  

CAUTION

(1) Be sure to short-circuit VCC1 and VCC2 before use.

(2) When IC total output current changes greatly, e.g. when output

current flows intermittently due to thermal protection operation,

supply voltage may fluctuate. Provide power supply and wiring

such that even in such a case amperage will not exceed

absolute maximum rating.

(3) Excessive power voltage fluctuations may cause unstable IC

operation. To regulate such fluctuations, connect capacitor

between terminals VCC and GND as close to IC terminal as

possible. (Refer to application example.)

(4) Thermal protection function

• Thermal protection characteristics may differ depending on

wiring layout. Be sure to test IC on circuit board before use.

After circuit board is replaced, test IC again.

• Circuit boards on which this IC mounted are designed such

that impedance between power supply and output terminal will

be kept low; therefore, IC output terminal may be short-

circuited internally if excessive surge voltage is applied

accidentally from outside. To prevent circuit board from

burning in such a case, take safety measures such as

installation of a fuse.

(5) Flywheel diode

This IC has built in flywheel diode to provide a return current

route to motor. To prevent overheating and malfunction in

operational areas where great current and voltage are applied,

install a Schottky diode externally. For details, refer to “Area of

Safe Operation” and “Application Example.”

MITSUBISHI <CONTROL / DRIVER IC>

M54646AP

2-PHASE STEPPER MOTOR DRIVER

.

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