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LB1845

Monolithic Digital IC PWM Current Controlling Stepping Motor Driver

ON Semiconductor 

Ordering number : EN5505D

LB1845

Monolithic Digital IC

PWM Current Controlling

Stepping Motor Driver

http://onsemi.com

Overview

The LB1845 is a PWM current control type stepping motor driver that uses a bipolar drive scheme. It is particularly

suitable for driving carriage and paper feed stepping motors in printers and similar products.

Features

• PWM current control (fixed off time scheme)

• Digital load current selection function

• Sustained output voltage: 45V

• Built-in thermal shutdown circuit

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter

Motor supply voltage

Peak output current

Continuous output current

Logic block supply voltage

Logic input voltage range

Emitter output voltage

Allowable power dissipation

Operating temperature

Storage temperature

Symbol

VBB max

IO peak

IO max

VCC

VIN

VE

Pd max1

Pd max2

Topr

Tstg

Conditions

tW ≤ 20μs

Independent IC

With an arbitrarily large heat sink

Ratings

Unit

45

V

1.75

A

1.5

A

7.0

V

-0.3 to VCC

V

1.0

V

3.0

W

20.0

W

-20 to +85

°C

-55 to +150

°C

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.

Semiconductor Components Industries, LLC, 2013

June, 2013

O1806 MS IM / D3096HA (OT) No.5505-1/9

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