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SI-7321M

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Package:HSOP44

2-phase stepper motor unipolar driver IC. The product has self-excitation PWM current control with fixed off time, with built-in protection features which operates during abnormal motor operation (coil short & open). Use of surface mount package allows the product to be mounted with 1/2 hight, compared to conventional packages(SLA,STA)

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Features

    ・Power supply voltages, VBB: 46V(max), 10V to 44V normal operating range
    ・Logic supply voltages VDD: supports 3.0V to 5.5V
    ・Output current Io:1.5A
    ・Clock-input method (built-in sequencer)
    ・Self-excitation PWM current control
    ・Synchronous PWM chopping function prevents motor noise in Hold mode
    ・Sleep mode for reducing the IC input current in stand-by state
    ・Selectable blanking time(1.8us or 3.6us)
    ・Selectable clock input edge (POS or POS/NEG)
    ・Selectable protection availability
    ・44-pin surface mount

Application

    ・Copy machine
    ・Printer
    ・Various manufacturing equipment

Specifications

Excitation Method 2 phase/4W1-2 phase
Maximum Supply Voltage 44 V
Output Current 1.5 A
On-Resistance 0.25 Ω
Input Method Clock in
OCP YES
TSD NO
STP (Simultaneous ON Protection Feature) YES
Open Coil YES
Package Weight (Typ.) 0.7 g

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Questions or Comments?

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