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What is NJM3771?

This electronic component, produced by the manufacturer "New Japan Radio", performs the same function as "DUAL STEPPER MOTOR DRIVER".


NJM3771 Datasheet PDF - New Japan Radio

Part Number NJM3771
Description DUAL STEPPER MOTOR DRIVER
Manufacturers New Japan Radio　
Logo New Japan Radio Logo　


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NJM3771
DUAL STEPPER MOTOR DRIVER
s GENERAL DESCRIPTION
The NJM3771 is a stepper motor driver, which circuit is
especially developed for use in microstepping applications in
conjunction with the matching dual DAC (Digital-to-Analog
Converter) NJU39610.
The NJM3771 contains a clock oscillator, which is common
for both driver channels; a set of comparators and flip-flops
imple menting the switching control; and two H-bridges with
internal recirculation diodes. Voltage supply requirements are
+5 V for logic and +10 to +45 V for the motor. Maximum
output current is 650 mA per channel.
s PACKAGE OUTLINE
NJM3771D2 NJM3771E3
s FEATURES
• Dual chopper driver
• 650 mA output current per channel
• Selectable slow/fast current decay for improved high-
speed microstepping
• Specially matched to Dual DAC NJU39610
• Packages DIP22 / EMP24(Batwing) / PLCC28
NJM3771FM2
s BLOCK DIAGRAM
NJM 3771
Phase 1
CD1 VR1
VCC
V
CC
C1
–
+
+
–
+
–
RC
–
+
+
–
E1
RQ
S
Logic
Logic
SQ
R
Phase 2
CD2 VR2
C2 GND
E2
M A1
M B1
VMM1
VMM2
M B2
M A2
Figure 1. Block diagram

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NJM3771 equivalent
NJM3771
s ELECTRICAL CHARACTERISTICS
Electrical characteristics over recommended operating conditions, unless otherwise noted. -20°C < TJ < +125°C
Parameter
General
Supply current
Total power dissipation
Symbol
I
CC
PD
Turn-off delay
td
Logic Inputs
Logic HIGH input voltage
Logic LOW input voltage
Logic HIGH input current
Logic LOW input current
VIH
VIL
IIH
IIL
Reference Inputs
Input resistance
Input current
Turn-off voltage
RR
IR
VTO
Comparator Inputs
Threshold voltage
| V - V | mismatch
CH1
CH2
Input current
V
CH
V
CH,diff
IC
Motor Outputs
Lower transistor saturation voltage
Lower transistor leakage current
Lower diode forward voltage drop
Upper transistor saturation voltage
Upper transistor leakage current
Upper diode forward voltage drop
Chopper Oscillator
Chopping frequency
fs
Conditions
VMM = 40 V, IM1= 450 mA, IM2= 0 mA.
Notes 2, 3.
VMM = 40 V, IM1 = IM2 = 318 mA.
Notes 2, 3.
Ta = +25°C, dVC/dt ≥ 50 mV/µs.
Note 3.
VI = 2.4 V
VI = 0.4 V
Ta = +25°C
Ta = +25°C, VR = 2.5 V.
R = 1 kohms, V = 2.5 V
CR
R = 1 kohms
C
IM = 500 mA
VMM = 41 V, VE = VR = 0 V, VC = VCC
IM = 500 mA
IM = 500 mA
VMM = 41 V, VE = VR = 0 V, VC = VCC
I = 500 mA
M
CT = 3300 pF, RT = 15 kohms
Min Typ
Max
- 38 50
1.4 1.6
1.6 1.8
- 1.0 1.5
2.0 -
--
--
-0.4 -
-
0.6
20
-
-5-
0.5 1.0
20 29 38
430 450 470
-1-
-10 -
1
- 1.00 1.20
- - 300
- 1.10 1.25
- 1.20 1.35
- - 300
- 1.00 1.25
25.0 26.5 28.0
s THERMAL CHARACTERISTICS
Parameter
Thermal resistance
Symbol
Rth
J-GND
RthJ-A
RthJ-GND
RthJ-A
RthJ-GND
RthJ-A
Conditions
DIP package.
DIP package. Note 2.
PLCC package.
PLCC package. Note 2.
EMP package.
EMP package. Note 2.
Min Typ Max
- 11
-
- 40
-
-9
-
- 35
-
- 13
-
- 42
-
Notes
1. All voltages are with respect to ground. Currents are positive into, negative out of specified terminal.
2. All ground pins soldered onto a 20 cm2 PCB copper area with free air convection.
3. Not covered by final test program.
4. Switching duty cycle D = 30%, fS = 26.5 kHz
Unit
mA
W
W
µs
V
V
µA
mA
kohm
mA
mV
mV
mV
µA
V
µA
V
V
µA
V
kHz
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for NJM3771 electronic component.


Information Total 9 Pages
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