NJM#3771E3-TE2 NJR, NJM#3771E3-TE2 Datasheet - Page 6

• Manufacturer Part Number: NJM#3771E3-TE2
• Description: Motor / Motion / Ignition Controllers & Drivers Dual Stepper Motor Lead Free Package
• Manufacturer: NJR
• Type: Dual Stepper Motor Controllerr

Specifications of NJM#3771E3-TE2

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 5 V
• Supply Current: 50 mA
• Mounting Style: SMD/SMT
• Package / Case: EMP-24
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Current control
The output current to the motor winding is mainly determined by the voltage at the reference input and the value of
the sensing resistor, R
Fast current decay setting will produce somewhat lower (average) current than slow current decay. The peak
current through the sensing resistor (and motor winding) can be expressed as:
i.e., with a recommended value of 1 ohm for the sensing resistor, R
output current of approximately 450 mA. To improve noise immunity on the V
increased to
5 volts if R
Chopping frequency, winding inductance, and supply voltage will affect the current level, but to much less extent.
I
M,peak
APPLICATIONS INFORMATION
= 0.18 • (V
S
Figure 7. Microstepping system with NJU39610 and NJM3771
is correspondingly changed to 2 ohms.
To
+2.5V
P
R
GND
(V
V
/ R
CC
CC
14
15
16
17
22
S
Figure 6. Typical stepper motor application with NJM3771
)
S
7
6
1
(+5 V)
.
) [A]
D0
D7
A0
A1
WR
CS
RESET
V
Ref
+5 V
NJU 39610
GND
(V
V
15 k
3 300 pF
CC
CC
16
15
14
7
8
9
V
V DD
)
(+5 V)
SS
12
5
Phase
CD
V
Phase
CD
V
18
RC
R1
R2
0.1 F
1
2
5,
17, 18
GND
1
2
V
6,
Sign
Sign
CC
CD
DA
CD
DA
11
1
1
1
2
2
2
NJM 3771
C
1
10
820 pF
19
3
20
4
2
21
1 k
+5 V
1.0
V
MM1
2
3
E
15 k
3 300 pF
1
16
15
14
7
8
9
R S
13
12
C
Phase
CD
V
Phase
CD
V
RC
R1
V
R2
2
0.1 F
1
820 pF
2
MM2
5,
17, 18
GND
20
1 k
1
1.0
2
V
6,
CC
M
M
M
M
21
11
E
A1
B1
A2
B2
NJM 3771
2
C
0.1 F
1
10
R S
820 pF
S
4
1
19
22
1 k
1.0
, a 2.5 V reference voltage will produce an
V
MM1
3
2
E
Pin numbers refer
to DIP package.
1
GND (V
R S
+
13
10 F
STEPPER
C
MOTOR
V
2
820 pF
MM2
V
R
20
1 k
MM
MM
1.0
input, the control range may be
)
21
M
M
M
M
E
A1
B1
A2
B2
2
0.1 F
R S
4
1
19
22
Pin numbers refer
to DIP package.
GND (V
+
10 F
STEPPER
MOTOR
V
MM
MM
)
NJM3771