NJM3775E3 NJR, NJM3775E3 Datasheet - Page 6

• Manufacturer Part Number: NJM3775E3
• Description: Motor / Motion / Ignition Controllers & Drivers Dual Stepper
• Manufacturer: NJR
• Type: Stepper Motor Controller/Driverr

Specifications of NJM3775E3

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 10 V to 45 V
• Supply Current: 50 mA to 70 mA
• Mounting Style: SMD/SMT
• Package / Case: EMP-24
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Current control
The regulated output current level to the motor winding is determined by the voltage at the reference input and the
value of the sensing resistor, R
expressed as:
I
With a recommended value of 0.5 ohm for the sensing resistor R
current of approximately 500 mA. R
absolute maximum output current which is 850 mA. Chopping frequency, winding inductance and supply voltage
also affect the current, but to much less extent.
the sensing resistor should be a 0.5 -1.0 W precision resistor, i. e. less than 1% tolerance and low temperature -
coefficient.
M,peak
For accurate current regulation,
APPLICATIONS INFORMATION
= 0.1•V
R
/ R
S
[A]
Figure 6. Typical stepper motor driver application with NJM3775.
Figure 7. Half stepping system where NJM3517 is used as controller circuit in
order to generate the necessary sequence to the NJM3775.
Direction
Half/Full
Step
Step
V
GND (V
+5 V
CC
+5 V
GND (V
+
10
11
4.7 F
8
9
(+5 V)
6
7
CC
STEP
12 k
DIR
HSM
INH
4 700 pF
fl
fl
)
S
B
A
10
14
13
16
. The peak current through the sensing resistor (and the motor winding) can be
CC
9
7
V
NJM
3517
GND
11
)
CC
3
Phase
Dis
V
Phase
Dis
V
S
RC
16
R1
R2
should be selected for maximum motor current. Be sure not to exceed the
0.1 F
1
2
P
P
A1
B1
5,
17, 18
GND
4 x
10 k
1
2
4
2
V
6,
CC
12
NJM3775
C
1
8
0.47
V
R S
MM1
4
2
E
1
12 k
4 700 pF
10
14
13
16
15
9
7
C
11
V
Phase
Dis
V
Phase
Dis
V
RC
2
R1
R2
0.1 F
MM2
1
2
5,
17, 18
19
GND
0.47
1
2
V
6,
S
R S
CC
, a 2.5 V reference voltage will produce an output
12
M
M
M
M
21
NJM3775
C
E
1
A1
B1
A2
B2
8
2
0.1 F
1.0
V
R S
MM1
3
1
20
22
2
4
E
1
15
C
V
2
Pin numbers refer
to DIP package.
MM2
19
1.0
GND (V
+
R S
10 F
STEPPER
M
M
M
M
21
E
MOTOR
A1
B1
A2
B2
2
0.1 F
V
3
1
20
22
MM
MM
Pin numbers refer
to DIP package.
)
GND (V
+
10 F
STEPPER
MOTOR
V
MM
MM
)
NJM3775