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PDF NJM3772 Data sheet ( Hoja de datos )
| Número de pieza | NJM3772 | |
| Descripción | DUAL STEPPER MOTOR DRIVER | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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DUAL STEPPER MOTOR DRIVER
NJM3772
s GENERAL DESCRIPTION
The NJM3772 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 NJM3772 contains a clock oscillator, which is common
for both driver channels, a set of comparators and flip-flops
implementing the switching control, and two H-bridges with
internal recirculation diodes. Voltage supply requirements are
+5 V for logic and +10 to +45V for the motor. Maximum output
current is 1000mA per channel.
s PACKAGE OUTLINE
NJM3772D2
NJM3772FM2
s FEATURES
• Dual chopper driver
• 1000mA continuous output current per channel
• Specially matched to the Dual DAC NJU39610
• Packages DIP22 / PLCC28
s BLOCK DIAGRAM
NJM3772
Phase 1 VR1
VCC
V
CC
C1
—
+
VMM1
E1
RQ
S
Logic
+
—
RC
Logic
+ SQ
R
—
Phase 2 VR2
C2 GND
VMM2
E2
Figure 1. Block diagram
M A1
M B1
VBB1
VBB2
M B2
M A2
1 page  
NJM3772
s ELECTRICAL CHARACTERISTICS
Electrical characteristics over recommended operating conditions, unless otherwise noted. -20°C< TJ < 125°C
Parameter
Symbol
Conditions
Min
General
Supply current
Total power dissipation
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
Comparator Inputs
Threshold voltage
| VCH1 - VCH2 | mismatch
Input current
Reference Inputs
Input resistance
Input current
Motor Outputs
Lower transistor saturation voltage
Lower transistor leakage current
Lower diode forward voltage drop
Upper transistor saturation voltage
Upper transistor saturation voltage
Upper transistor leakage current
Chopper Oscillator
Chopping frequency
VIH
VIL
IIH
I
IL
VCH
VCH,diff
IC
R
R
IR
fs
Note 4.
VMM = 12 V, IM1= IM2= 750 mA.
RB = 0.68 ohm. Notes 2, 3, 4, 5.
VMM = 12 V, IM1 = 1000 mA, IM2 = 0 mA.
RB = 0.47 ohm. Notes 2, 3, 4, 5.
T
A
=
+25°C,
dV /dt
C
≥
50
mV/µs,
I = 100 mA. Note 3.
M
VI = 2.4 V
V = 0.4 V
I
RC = 1 kohm, VR = 2.50 V
RC = 1 kohm
T
A
=
+25°C
VR = 2.50 V
IM = 750 mA
VMM = 41 V, VE = VR = 0 V, VC = VCC
IM = 750 mA
I = 750 mA. R = 0.68 ohm. Note 5
MB
IM = 750 mA. RB = 0.47 ohm. Note 3, 5
VMM VBB = 41 V, VE = VR = 0 V, VC = VCC
CT = 3300 pF, RT = 15 kohm
-
-
-
-
-
2.0
-
-
-0.4
430
-
-10
-
-
-
-
-
-
-
-
25.0
s THERMAL CHARACTERISTICS
Parameter
Symbol
Thermal resistance
RthJ-GND
RthJ-A
RthJ-GND
RthJ-A
Conditions
DIP package
DIP package. Note 2
PLCC package
PLCC package. Note 2
Min
-
-
-
-
Typ
60
1.8
1.8
160
1.4
-
-
-
-
450
1
-
5
0.5
0.6
-
1.2
0.6
0.8
-
26.5
Typ
11
40
9
35
Max
Unit
75 mA
2.1 W
2.2 W
- °C
2.0 µs
-V
0.8 V
20 µA
- mA
470 mV
- mV
1 µA
- kohm
1.0 mA
0.9 V
700 µA
1.5 V
0.9 V
1.1 V
700 µA
28.0 kHz
Max Unit
- °C/W
- °C/W
- °C/W
- °C/W
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, TA = +25°C
3. Not covered by final test program
4. Switching duty cycle D = 30%, fs = 26.5 kHz
5. External resistors RB for lowering of saturation voltage
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet NJM3772.PDF ] | |
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