PBL37711N Ericsson Microelectronics, PBL37711N Datasheet

PBL37711N

Manufacturer Part Number

PBL37711N

Description

DIP-22

Manufacturer

Ericsson Microelectronics

Datasheet

1.PBL37711N.pdf (8 pages)

Specifications of PBL37711N

Date_code

04+

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Figure 1. Block diagram.

Description

The PBL 3771/1 is a switch-mode, constant-current driver IC (chopper) with two

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

developed for use in microstepping applications in conjunction with the matching dual

DAC (Digital-to-Analog Converter) PBM 3960. A complete driver system consists of

these two ICs, a few passive components and a microprocessor for generation of the

proper control and data codes required for microstepping.

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

two H-bridges with internal recirculation diodes. Voltage supply requirements are +5 V

for logic and +10 to +45 V for the motor. Maximum output current is 650 mA per

channel.

stage for improved high-speed microstepping.

current ratios and motor positioning accuracy.

The PBL 3771/1 contains a clock oscillator, which is common for both driver

A special logic function is used to select slow or fast current decay in the output

The close match between the two driver channels guarantees consistent output

PBL 3771/1

–

Phase

Precision Stepper Motor Driver

–

GND

Logic

MM1

MM2

Key Features

• Dual chopper driver in a single

• 650 mA output current per channel.

• Close matching between channels for

• Selectable slow/fast current decay for

• Improved low-level linearity.

• Specially matched to Dual DAC

• Selection of packages, 22-pin

package.

high microstepping accuracy.

improved high-speed microstepping.

PBM 3960.

“batwing” DIP, 24 pin "batwing" SOIC

or 28-lead PLCC with lead-frame for

heat-sinking through PC board

copper.

22-pin plastic DIP package

PBL 3771/1

28-pin PLCC package

24-pin SO package

February 1999

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