SI-7321M |Sanken Electric

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SI-7321M

Data sheetdownload (PDF:719.81KB)
Application Note

Description

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)

Application

・Copy machine
・Printer
・Various manufacturing equipment

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

Remarks

Package

Package Name:HSOP44

Package Diagram

Specifications

Excitation Method2 phase to 4W1-2 phase
Supply Voltage10V to 44V
Output Current1.5A
On-Resistance0.25Ω
Input MethodClock in
OCPYES
TSDNO
STP (Simultaneous ON Protection Feature)YES
Open Coil ProtectionYES

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Representative Circuit

Internal Block Diagram

Pin-out Diagrams

Data sheetdownload (PDF:719.81KB)
Application Note
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