D2706 MS IM / 93004 JO IM No.7232-1/8

LB1940T

LB1940U

Overview

The LB1940T and LB1940U are 2-phase exciter type bipolar stepping motor driver ICs that feature low-voltage,

(supporting 3V battery) and low current operation with low saturation voltage. These ICs enable constant-current control

of actuators, and are optimal for driving the actuators of PC peripherals such as USB compatible scanners, FDDs, and

printers, as well as for controlling the shutter, iris, and AF of a digital still camera.

Features

• Low-voltage driving

2-power source type:

VS = 1.6 to 7.5V, VDD = 1.9 to 6.5V

Single power source type: VS = VDD = 1.9 to 7.5V

• Low saturation output:

VO(sat) = 0.3V at IO of 200mA

• Constant-current control

• Built-in reference voltage (Vref = 0.9V)

• Small-sized, low-profile package (LB1940T: TSSOP20; 225mil; thickness (t) = 1.2mm max.)

(LB1940U: MSOP20; thickness (t) = 0.85mm max.)

Specifications

Absolute Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

VB max

VS1, VS2, VDD

-0.3 to +10.5

V

Output applied voltage

VOUT max

OUT1, OUT2, OUT3, OUT4

-0.3 to +10.5

V

Output Current

IO max

400

mA

Input applied voltage

VIN max

ENA1, ENA2, IN1, IN2, VC

-0.3 to +10.5

V

Allowable power dissipation

Pd max

Mounted on a specified board *

800

mW

Operating temperature

Topr

-20 to +85

°C

Storage temperature

Tstg

-55 to +150

°C

* Mounted on a Specified board: 114.3mm

×76.1mm×1.6mm, glass epoxy

Ordering number : EN7232A

Monolithic Digital IC

2-ch H-Bridge Constant Current 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.