Product Overview

LB1939T: Motor Driver, Constant Voltage / Current, H-Bridge, 2-Channel

For complete documentation, see the data sheet

Product Description

The LB1939T is a 2-phase excitation bipolar stepping motor driver that features low voltage operation, a low saturation voltage and

low power consumption. It supports constant voltage and constant current drive, can control two iris motors and is optimal for

shutter, iris and AF drive in 3V battery operated still digital cameras and other battery operated equipment.

Features

• Low voltage drive

• Low saturation voltage output

• Supports constant voltage and constant current drive

• Built-in reference voltage circuit

Applications

• Battery operated equipment

Part Electrical Specifications

Product

Compliance

Status

Type

Min

(V)

Max

(V)

Min

(V)

Max

(V)

Max

(A)

Peak

Max

(A)

Step

Reso

lutio

n

Cont

rol

Type

Feed

back

Meth

od

Curr

ent

Sens

e

Reg

ulato

r

Outp

ut

Fault

Dete

ction

Flyb

ack

Prot

ectio

n

n)

Typ

(Ω)

Pack

age

Type

LB1939T-MPB-E

Pb-free

Active

Step

per

1.6

10.5

1.9

10.5

0.4

1

½

Paral

lel

Non

e

Exter

nal

Resi

stor

Yes

Ther

mal

Integ

rated

Activ

e

TSS

OP-

20

LB1939T-TLM-E

Pb-free

Active

Step

per

1.6

10.5

1.9

10.5

0.4

½

1

Paral

lel

Non

e

Exter

nal

Resi

stor

Yes

Ther

mal

Integ

rated

Activ

e

TSS

OP-

20

For more information please contact your local sales support at www.onsemi.com

Created on: 1/15/2015