NJM37770 New Japan Radio Co., Ltd., NJM37770 Datasheet - Page 2

• Manufacturer Part Number: NJM37770
• Description: STEPPER MOTOR DRIVER
• Manufacturer: New Japan Radio Co., Ltd.

PIN CONFIGURATIONS
PIN DESCRIPTION
12,13
3,14
4,5,
DIP
10
11
15
16
1
2
6
7
8
9
Symbol
Phase
GND
V
V
M
M
V
C
E
T
I
I
MM
CC
1
0
R
B
A
Figure 2. Pin configurations
Description
Motor output B, Motor current flows from M
Clock oscillator. Timing pin connect a 56 k
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
Motor current flows from M
Logic input. It controls, together with the I
stage.
The controllable levels are fixed to 100, 60, 20, 0%.
Comparator input. This input senses the instantaneous voltage across the
sensing
Reference voltage. Controls the threshold voltage of the comparator and hence
the output current. Input resistance: typically 6.8 k
Motor output A, Motor current flows from M
Common emitter. Connect the Sense resistor between this pin and ground.
resistor, filtered through a RC Network.
A
to M
B
when the phase input is high.
1
input, the current level in the output
A
A
to M
resistor and a 820 pF in
to M
A
and M
B
B
when Phase is high.
when Phase is high.
± 20%.
B
outputs.
NJM37770