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.

21809 MS / 11499RM(KI) No.5982-1/15

LB1847

Overview

The LB1847 is a driver IC for stepping motors with PWM current control bipolar drive (fixed OFF time). A special feature

of this IC is that VREF voltage is constant while the current can be set in 15 steps, allowing drive of motors ranging from

1-2 phase exciter types to 4W 1-2 phase exciter types. The current decay pattern can also be selected (SLOW DECAY,

FAST DECAY, MIX DECAY) to increase the decay of regenerative current at chopping OFF, thereby improving response

characteristics. This is especially useful for carriage and paper feed stepping motors in printers and similar applications

where high-precision control and low vibrations are required.

Features

• PWM current control (fixed OFF time)

• Load current digital selector (1-2, W1-2, 2W1-2, 4W1-2 phase exciter drive possible)

• Selectable current decay pattern (SLOW DECAY, FAST DECAY, MIX DECAY)

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

• Noise canceler

• Built-in thermal shutdown circuit

• Built-in logic low-voltage OFF circuit

Specifications

Absolute Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Motor supply voltage

VBB

50

V

Output peek current

IO peak

tW = 20µs

1.75

A

Output continuous current

IO max

1.5

A

Logic supply voltage

VCC

7.0

A

Logic input voltage range

VIN

-0.3 to VCC

V

Emitter output voltage

VE

1.0

V

Independent IC

3.0

W

Allowable power dissipation

Pd max

With infinitely large heat sink

20

W

Operating temperature

Topr

-20 to +85

°C

Storage temperature

Tstg

-55 to +150

°C

Monolithic Digital IC

PWM Current Control Type

Stepping Motor Driver

Ordering number : EN5982A