N2206 / 73004TN(OT) No.7946-1/12

Any and all SANYO Semiconductor products described or contained herein do not have specifications

that can handle applications that require extremely high levels of reliability, such as life-support systems,

aircraft's control systems, or other applications whose failure can be reasonably expected to result in

serious physical and/or material damage. Consult with your SANYO Semiconductor representative

nearest you before using any SANYO Semiconductor products described or contained herein in such

applications.

SANYO Semiconductor assumes no responsibility for equipment failures that result from using products

at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition

ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor

products described or contained herein.

LB11946

Overview

The LB11946 is a stepping motor driver IC that implements PWM current control bipolar drive with a fixed off time.

This IC features 15 current setting levels using a fixed VREF voltage and support for microstepping drive from 1-2

phase excitation drive to 4W1-2 phase excitation drive. This device is optimal for driving stepping motors such as

those used for carriage drive and paper feed in printers.

Features

• PWM current control (with a fixed off time)

• Logic input serial-parallel converter (allows 1-2, W1-2, 2W1-2, and 4W1-2 phase excitation drive)

• Current attenuation switching function (with slow decay, fast decay, and mixed decay modes)

• Built-in upper and lower side diodes

• Simultaneous on state prevention function (through current prevention)

• Noise canceller function

• Thermal shutdown circuit

• Shutoff on low logic system voltage circuit

• Low-power mode control pin

Specifications

Absolute Maximum Ratings at Ta

= 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Motor supply voltage

VBB

50

V

Peak output current

tw

≤ 20 µS

1.2

A

Continuous output current

1.0

A

Logic system supply voltage

7.0

V

Logic input voltage range

V

VE

1.0

V

Emitter output voltage

VE

0.5

V

Allowable power dissipation (IC internal)

Pdmax

Ta

= 25°C, independent IC

3.0

W

Operating temperature

Topr

−20 to +85

°C

Storage temperature

Tstg

−55 to +150

°C

Ordering number : ENN7946

Monolithic Digital IC

PWM Current Control Stepping

Motor Driver