30409 MS / 82799RM(KI) No.6193-1/7

http://onsemi.com

Semiconductor Components Industries, LLC, 2013

June, 2013

LB1945H

Overview

The LB1945H is a PWM current control type stepping motor driver.

Feature

• PWM current control (external excitation)

• Load current digital selection (1-2, W1-2, and 2 phase excitation drives possible)

• Built-in upper/lower diode

• Simultaneous ON prevention function (feed-through current prevention)

• Built-in thermal shutdown circuit

• Built-in noise canceler

Specifications

Absolute Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum motor supply voltage

VBB max

30

V

Output peak current

IO peak

tw ≤ 20μs

1.0

A

Output continuous current

IO max

0.8

A

Logic supply voltage

VCC max

6.0

V

Logic input voltage range

VIN max

-0.3 to VCC

V

Emitter output voltage

VE max

1.0

V

Allowable power dissipation

Pd max

Mounted on a specified board *

1.9

W

Operating temperature

Topr

-20 to +90

°C

Storage temperature

Tstg

-55 to +150

°C

* Specified board: 114.3mm

× 76.1mm × 1.6mm, glass epoxy board.

Monolithic Digital IC

PWM Current Control Type

Stepping Motor Driver

Ordering number : EN6193B

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating

Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.