NJM37770 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJM37770

STEPPER MOTOR DRIVER

Japan Radio Corporation  

s PIN CONFIGURATIONS

NJM37770

Figure 2. Pin configurations

s PIN DESCRIPTION

DIP

1

2

3,14

4,5,

12,13

6

7

8

9

10

11

15

16

Symbol

MB

T

VMM

GND

VCC

I

1

Phase

I

0

C

V

R

MA

E

Description

Motor output B, Motor current flows from MA to MB when Phase is high.

Clock oscillator. Timing pin connect a 56 kΩ resistor and a 820 pF in

parallel between T and Ground.

Motor supply voltage, 10 to 40 V. Pin 3(12) and pin 14(4) should be wired to

gether.

Ground and negative supply. Note these pins are used for heatsinking.

Make sure that all ground pins are soldered onto a suitable large copper

ground plane for efficient heat sinking.

Logic voltage supply normally +5 V.

Logic input. It controls, together with the I0 input, the current level in the output

stage.

The controllable levels are fixed to 100, 60, 20, 0%.

Controls the direction of the motor current of M and M outputs.

A

B

Motor current flows from MA to MB when the phase input is high.

Logic input. It controls, together with the I input, the current level in the output

1

stage.

The controllable levels are fixed to 100, 60, 20, 0%.

Comparator input. This input senses the instantaneous voltage across the

sensing resistor, filtered through a RC Network.

Reference voltage. Controls the threshold voltage of the comparator and hence

the output current. Input resistance: typically 6.8 kΩ ± 20%.

Motor output A, Motor current flows from MA to MB when Phase is high.

Common emitter. Connect the Sense resistor between this pin and ground.

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