PBL3775 Ericsson Microelectronics, PBL3775 Datasheet

PBL3775

Manufacturer Part Number

PBL3775

Description

DIP

Manufacturer

Ericsson Microelectronics

Datasheet

1.PBL3775.pdf (8 pages)

Specifications of PBL3775

Date_code

01+

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Figure 1. Block diagram

Description

The PBL 3775/1 is a switch-mode (chopper), constant-current driver IC with two

channels, one for each winding of a two-phase stepper motor. The circuit is similar to

Ericsson´s PBL 3773/1. While several of Ericsson´s dual stepper motor drivers are

optimized for micro-stepping applications, PBL 3775/1 is equipped with a disable

input to simplify half-stepping operation.

channels, a set of comparators and flip-flops implementing the switching control, and

two output H-bridges, including recirculation diodes.

current ratios and motor positioning accuracy.

The PBL 3775/1 contains a clock oscillator, which is common for both driver

Voltage supply requirements are + 5 V for logic and + 10 to + 45 V for the motor.

The close match between the two driver channels guarantees consistent output

PBL 3775/1

–

Phase

Dis

–

GND

Logic

Dual Stepper Motor Driver

MM1

MM2

Key Features

• Dual chopper driver in a single

• Operation down to -40 C.

• 750 mA continuous output current

• Low power dissipation, 2.0 W at

• Close matching between channels

• Digital filter on chip eliminates

• Plastic 22-pin batwing DIL package,

package.

per channel.

2 x 500 mA output current.

for high microstepping accuracy.

external filtering components.

24-pin SOIC batwing or 28-pin power

PLCC. All with lead-frame for

heatsinking through PC board

copper.

22-pin plastic DIP package

PBL 3775/1

28-pin PLCC package

24-pin SO package

February 1999

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