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PDF NJM3775 Data sheet ( Hoja de datos )
| Número de pieza | NJM3775 | |
| Descripción | DUAL STEPPER MOTOR DRIVER | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJM3775
DUAL STEPPER MOTOR DRIVER
s GENERAL DESCRIPTION
The NJM3775 is a switch-mode (chopper), constant-
current driver with two channels: one for each winding
of a two-phase stepper motor. NJM3775 is equipped
with a Disable input to simplify half-stepping operation.
The NJM3775 contains a clock oscillator, which is
common for both driver channels, a set of comparators
and flip-flops implementing the switching control, and
two output H-bridges, including recirculation diodes.
Voltage supply requirements are + 5 V for logic and +
10 to + 45 V for the motor. Maximum output current is
750mA per channel.
s PACKAGE OUTLINE
NJM3775D2 NJM3775E3
NJM3775FM2
s FEATURES
• Dual chopper driver
• 750 mA continuous output current per channel
• Digital filter on chip eliminates external filtering components
• Packages DIP22 / PLCC28 / EMP24(batwing)
s BLOCK DIAGRAM
NJM3775
Phase 1
Dis1 VR1
C1
VCC VCC
—
+
E1
RQ
S
Logic
+
—
RC
Logic
+ SQ
R
—
Phase 2
Dis 2 VR2
C2
GND
E2
Figure 1. Block diagram
M A1
M B1
VMM1
VMM2
M B2
M A2
1 page  
NJM3775
s ELECTRICAL CHARACTERISTICS
Electrical characteristics over recommended operating conditions, unless otherwise noted. - 20°C ≤ Tj ≤ + 125°C.
Parameter
Symbol
Conditions
General
Supply current
Supply current
Total power dissipation
I
CC
I
CC
PD
Total power dissipation
PD
Thermal shutdown junction temperature
Turn-off delay
t
d
Logic Inputs
Logic HIGH input voltage
Logic LOW input voltage
Logic HIGH input current
Logic LOW input current
Analog Inputs
Threshold voltage
Input current
|VC1—VC2| mismatch
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
Digital filter blanking time
VIH
VIL
IIH
I
IL
VCH
IA
VCdiff
fs
tb
Note 4.
Dis = Dis = HIGH.
12
VMM= 24 V, IM1= IM2= 500 mA.
Notes 2, 3, 4.
VMM= 24 V, IM1= 700 mA, IM2= 0 mA.
Notes 2, 3, 4.
T
A
=
+25°C,
dV /dt
C
≥
50
mV/µs,
IM = 100 mA. Note 3.
VI = 2.4 V
V = 0.4 V
I
VR=5 V
VR= 5 V
I = 500 mA
M
VMM=41 V,TA = +25°C. Dis1= Dis2= HIGH.
IM = 500 mA
IM = 500 mA.
VMM=41 V,TA = +25°C. Dis1= Dis2= HIGH..
IM = 500 mA.
CT = 4 700 pF, RT = 12 kohm
CT = 4 700 pF. Note 3.
Min
-
-
-
-
-
-
2.0
-
-
-0.2
480
-
-
-
-
-
-
-
-
21.5
-
Typ
55
7
2.0
1.7
160
1.1
-
-
-
-0.1
500
500
1
0.4
-
1.1
1.1
-
1.1
23.0
1.0
s THERMAL CHARACTERISTICS
Parameter
Thermal resistance
Symbol
Conditions
Rth
J-GND
RthJ-A
RthJ-GND
RthJ-A
RthJ-GND
RthJ-A
DIP package.
DIP package. Note 2.
PLCC package.
PLCC package. Note 2.
EMP package
EMP package
Min Typ
- 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,
T
A
=
+
25°
C.
3. Not covered by final test program.
4. Switching duty cycle D = 30 %, fs = 23.0 kHz.
Max Unit
70 mA
10 mA
2.3 W
2.0 W
- °C
2.0 µs
-V
0.6 V
20 µA
- mA
520 mV
- µA
- mV
0.8 V
100 µA
1.3 V
1.4 V
100 µA
1.4 V
24.5 kHz
- µs
Max
Unit
- °C/W
- °C/W
- °C/W
- °C/W
- °C/W
- °C/W
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet NJM3775.PDF ] | |
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