NJM3772FM2# NJR, NJM3772FM2# Datasheet - Page 2

• Manufacturer Part Number: NJM3772FM2#
• Description: IC STEPPER MOTOR DVR DUAL 28PLCC
• Manufacturer: NJR

Specifications of NJM3772FM2#

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: 1A
• Voltage - Load: 10 V ~ 40 V
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -20°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NJM#3772FM2; NJM#3772FM2

Figure 2. Pin configurations
PLCC
1-3, 9, 5, 6
13-17 17, 18
4
5
6
7
8
10
11
12
18
19
20
21
22
23
24
25
26
27
28
PIN CONFIGURATIONS
PIN DESCRIPTION
DIP
8
9
10
11
12
13
14
15
16
19
20
21
22
1
2
3
4
7
Symbol
GND
M
V
E
M
M
E
V
M
V
Phase
V
C
V
RC
C
V
Phase
V
BB2
2
1
BB1
MM1
R1
CC
R2
MM2
1
2
A2
B2
B1
A1
V
GND
V
M
M
BB2
BB1
E
E
1
2
B2
B1
2
1
10
11
5
6
7
8
9
Description
Ground and negative supply. Note: these pins are used thermally for heat-sinking.
Make sure that all ground pins are soldered onto a suitably large copper ground
plane for efficient heat sinking.
Motor output A, channel 2. Motor current flows from M
Collector of upper output transistor, channel 2. For lowest possible power dissipation, connect a
series resistor R
Common emitter, channel 2. This pin connects to a sensing resistor R
Motor output B, channel 2. Motor current flows from M
Motor output B, channel 1. Motor current flows from M
Common emitter, channel 1. This pin connects to a sensing resistor R
Collector of upper output transistor, channel 1. For lowest possible power dissipation, connect a
series resistor R
Motor output A, channel 1. Motor current flows from M
Motor supply voltage, channel 1, +10 to +40 V. V
Controls the direction of motor current at outputs M
when Phase
Reference voltage, channel 1. Controls the threshold voltage for the comparator and hence the
output current.
Comparator input channel 1. This input senses the instantaneous voltage across the sensing
resistor, filtered by an RC network. The threshold voltage for the comparator is V
i.e. 450 mV at V
Logic voltage supply, nominally +5 V.
Clock oscillator RC pin. Connect a 15 kohm resistor to V
obtain the nominal switching frequency of 26.5 kHz.
Comparator input channel 2. This input senses the instantaneous voltage across the sensing
resistor, filtered by an RC network. The threshold voltage for the comparator is V
i.e. 450 mV at V
Reference voltage, channel 2. Controls the threshold voltage for the comparator and hence the
output current.
Controls the direction of motor current at outputs M
when Phase
Motor supply voltage, channel 2, +10 to +40 V.V
NJM3772FM2
1
2
is HIGH.
is HIGH.
R1
R2
B2
B1
to V
to V
= 2.5 V.
= 2.5 V.
MM2
MM1
. See Applications information, External components.
. See Applications information, External components.
25
24
23
22
21
20
19
V
C
RC
V
C
V
Phase
CC
R2
R1
2
1
1
Phase
V
V
GND
GND
V
MM2
M
BB2
M
MM1
RC
C
MM1
R2
E
A2
B2
2
2
2
A1
A2
and V
and V
10
11
1
2
3
4
5
6
7
8
9
and M
and M
A2
A2
A1
A1
to M
to M
to M
to M
CC
3772D2
MM2
MM2
NJM
and a 3300 pF capacitor to ground to
B1
B2
B2
B2
B1
B1
. Motor current flows from M
. Motor current flows from M
should be connected together.
should be connected together.
when Phase
when Phase
when Phase
when Phase
22
21
20
19
18
17
16
15
14
13
12
S
S
to ground.
to ground.
C
V
Phase
GND
GND
E
V
V
M
V
M
CC
1
R1
MM1
BB1
1
A1
B1
2
2
1
1
is HIGH.
is HIGH.
is HIGH.
is HIGH.
1
NJM3772
CH2
CH1
= 0.18 • V
= 0.18 • V
A1
A2
to M
to M
R2
R1
B1
B2
[V],
[V],