Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate

the performance, characteristics, and functions of the described products in the independent state, and are not

guarantees of the performance, characteristics, and functions of the described products as mounted in the

customer

device, the customer should always evaluate and test devices mounted in the customer

equipment.

Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to

"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,

communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be

intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace

instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety

equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case

of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee

thereof. If you should intend to use our products for applications outside the standard applications of our

customer who is considering such use and/or outside the scope of our intended standard applications, please

consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our

customer shall be solely responsible for the use.

22509 MS 20090212-S00006 / N2206 / 73004TN(OT) No.7946-1/14

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 micro-stepping 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

Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Motor supply voltage

VBB

50

V

Peak output current

IO peak

tw

≤ 20µS

1.2

A

Continuous output current

IO max

1.0

A

Logic system supply voltage

VCC

7.0

V

Logic input voltage range

VIN

-0.3 to VCC

V

VCC = 5V specifications

1.0

V

Emitter output voltage

VE

VCC = 3.3V specifications

0.5

V

Allowable power dissipation

Pd max

Independent IC

3.0

W

Operating temperature

Topr

-25 to

+85

°C

Storage temperature

Tstg

-55 to

+150

°C

Monolithic Digital IC

PWM Current Control

Stepping Motor Driver

Ordering number : EN7946A