11707 SY IM B8-5416 No.7115-1/16

LB1946

Overview

The LB1946 is stepping motor drive 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 supports for microstepping drive from 1-2 phase

excitation 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.

Applications

• PWM current control stepping motor drivers

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 output 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

IO PEAK

tw

≤20µs

1.75

A

Maximum continuous output current

IO max

1.5

A

Logic system supply voltage

VCC

7.0

V

Logic input voltage range

VIN

-0.3 to VCC

V

Emitter output voltage

VE

1.0

V

Operating temperature

Topr

-20 to +85

°C

Storage temperature

Tstg

-55 to +150

°C

Allowable power dissipation (IC internal)

Pd max

Ta=25

°C, independent IC

3.0

W

Ordering number : EN7115

Monolithic Digital IC

PWM Current Control Stepping Motor Driver

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.