NJM#3517E2 NJR, NJM#3517E2 Datasheet - Page 3

• Manufacturer Part Number: NJM#3517E2
• Description: Motor / Motion / Ignition Controllers & Drivers Stepper
• Manufacturer: NJR
• Type: Stepper Motor Controllerr

Specifications of NJM#3517E2

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 5 V
• Supply Current: 60 mA
• Mounting Style: SMD/SMT
• Package / Case: EMP-16
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The circuit, NJM3517, is a high performance motor driver, intended to drive a stepper motor in a unipolar, bi-level
way. Bi-level means that during the first time after a phase shift, the voltage across the motor is increased to a
second voltage supply, V
pensates for the loss in drive current and loss of torque due to the back emf of the motor.
the V
performance is determined by V
by adding a few external components, see figure 4.
by the timing components R
All inputs are LS-TTL compatible. If any of the logic inputs are left open, the circuit will accept it as a HIGH level.
NJM3517 contains all phase logic necessary to control the motor in a proper way.
STEP — Stepping pulse
One step is generated for each negative edge of the STEP signal. In half-step mode, two pulses will be required to
move one full step. Notice the set up time, t
negative edge of STEP, see timing diagram, figure 6.
The current starts to rise toward a value which is many times greater than the rated winding current. This com-
After a short time, t
In a low-voltage system, where high motor performance is needed, it is also possible to double the motor voltage
The time the circuit applies the higher voltage to the motor is controlled by a monostable flip-flop and determined
The circuit can also drive a motor in traditional unipolar way.
An inhibit input (INH) is used to switch off the current completely.
FUNCTIONAL DESCRIPTION
LOGIC INPUTS
MM
V
V
+ 5V
GND (V
SS
MM
supply, which is chosen for rated winding current. How long this time must be to give any increase in
V
+ 5V
GND (V
Input / Output-Device
MM
CMOS, TTL-LS
Input / Output-Device
HALF / FULL STEP
NORMAL /INHIBIT
CC
CMOS, TTL-LS
(Optional Sensor)
HALF / FULL STEP
V
GND
NORMAL /INHIBIT
CC
)
(Optional Sensor)
CC
V
GND
)
CC
CW / CCW
CW / CCW
STEP
STEP
On
R9
, set by the monostable, the bi-level output is switched off and the winding current flows from
R9
R8
SS
R8
, in order to obtain a more-rapid rise of current, see figure 25.
R
T
R
T
T
and C
C
C
T
T
STEP
HSM
STEP
DIR
INH
HSM
RC
O
O
DIR
INH
SS
RC
O
O
A
B
A
B
12
7
6
10
11
9
8
12
7
6
10
11
9
8
voltage and motor data, the L/R time-constant.
T
.
Phase
Logic
Phase
Logic
Mono
Mono
F - F
F - F
P
P
P
P
A
B
A
B
s
, of DIR and HSM signals. These signals must be latched during the
V
V
CC
16
PQR
CC
16
PQR
+
+
C
C
3
3
+
+
C
C
4
4
+
C
R1
5
V
15
SS
V
SS
15
D3
NJM3517
13
14
NJM3517
1
2
5
4
3
13
14
1
2
5
4
3
L
L
P
P
GND
P
P
B
A
B2
A2
A1
B1
L
L
P
P
P
P
GND
A
B
B2
B1
A2
A1
Equal to
Phase A
R4
R5
R2
Q1
Q3
R12
R11
C1
D2
MOTOR
Q5
1/2 MOTOR
R13
GND (V
GND (V
D1
R10
Q6
D1
R10
MM
D3-D6 are
UF 4001 or
BYV 27
trr < 100 ns
,V
MM
D3-D6
SS
,V
)
SS
)
NJM3517
Figure 3.
Typical
application
Figure 4.
Voltage
doubling with
external
transistors