NJM3775E3 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJM3775E3

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NJM3775

DUAL STEPPER MOTOR DRIVER

s GENERAL DESCRIPTION

The NJM3775 is a switch-mode (chopper), constant-

current driver with two channels: one for each winding

of a two-phase stepper motor. NJM3775 is equipped

with a Disable input to simplify half-stepping operation.

The NJM3775 contains a clock oscillator, which is

common for both driver channels, a set of comparators

and flip-flops implementing the switching control, and

two output H-bridges, including recirculation diodes.

Voltage supply requirements are + 5 V for logic and +

10 to + 45 V for the motor. Maximum output current is

750mA per channel.

s PACKAGE OUTLINE

NJM3775D2 NJM3775E3

NJM3775FM2

s FEATURES

• Dual chopper driver

• 750 mA continuous output current per channel

• Digital filter on chip eliminates external filtering components

• Packages DIP22 / PLCC28 / EMP24(batwing)

s BLOCK DIAGRAM

Phase 1

Dis1 VR1

C1

NJM3775

VCC

VCC

—

+

E1

RQ

S

Logic

+

—

RC

Logic

+

SQ

R

—

Phase 2

Dis 2 VR2

C2

GND

E2

Figure 1. Block diagram

M A1

M B1

VMM1

VMM2

M B2

M A2

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