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PDF NJM3776 Data sheet ( Hoja de datos )
| Número de pieza | NJM3776 | |
| Descripción | DUAL CONTROLLER FOR HIGH-CURRENT STEPPER MOTOR | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJM3776 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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NJM3776
DUAL CONTROLLER FOR HIGH-CURRENT STEPPER MOTOR
s GENERAL DESCRIPTION
The NJM3776 is a switch-mode (chopper), constant-current
controller intended for controlling external transistors in a high
current stepper motor application. The NJM3776 has two channels,
one for each winding of a two-phase stepper motor. The NJM3776
is equipped with a Disable input to simplify half stepping operation.
The NJM3776 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 sections each containing four
outputs, two source and two sink, intended to drive an external H-
bridge. Voltage supply requirements are +5 V for logic and +10 to
+45 V for the outputs.
s PACKAGE OUTLINE
NJM3776D2
s FEATURES
• Suitable to drive any external MOS FET or bipolar power transistor
• Cross conduction prevented by time delay
• Digital filter on chip eliminates external filtering components
• Package DIP24
s BLOCK DIAGRAM
Phase 1
Dis 1 VR1
C1 SGND 1
Pwr GND 1
1
NJM3776
VCC
V
CC
–
+ RQ
S
Logic
RC
Figure 1. Block diagram
+
–
Logic
+ SQ
R
–
Phase 2
Dis2 VR2
C2
SGND 2
Pwr GND 2
T1BL
T1AL
T1AU
T1BU
VBB1
VBB2
T2BU
T2AU
T2AL
T2BL
1 page  
NJM3776
s ELECTRICAL CHARACTERISTICS
Electrical characteristics over recommended operating conditions, unless otherwise noted. 0°C ≤ Tj ≤ +125°C .
Parameter
Symbol
Conditions
General
Supply current
Supply current
Total power dissipation
I
CC
I
CC
P
D
Thermal shutdown junction temperature
Turn-off delay
t
d
Logic Input
Logic HIGH input voltage
Logic LOW input voltage
Logic HIGH input current
Logic LOW input current
Analog Inputs
Input current
|VC1—VC2| mismatch
Motor Outputs
Lower transistor saturation voltage
Lower transistor leakage current
Upper transistor saturation voltage
Upper transistor leakage current
Chopper Oscillator
Chopping frequency
Digital filter blanking time
VIH
VIL
IIH
IIL
I
A
VCdiff
fs
t
b
Note 3.
Dis = Dis = HIGH.
12
V = 24 V, I = I = 200 mA.
BB BB1 BB2
Notes 2, 3.
Note 2
dV /dt
C
≥
50
mV/µs,
I = 100 mA. Note 2.
BB
VI = 2.4 V
VI = 0.4 V
V= 5 V
r
TA = 25°C Note 3
IM = 200 mA
Dis1 = Dis2 = High,TA=25°C
IM = 200 mA
Dis1 = Dis2 = High,TA=25°C
CT = 4 700 pF, RT = 12 kohm
C = 4 700 pF. Note 3.
T
s THERMAL CHARACTERISTICS
Min Typ Max Unit
- 65 70 mA
- 7 10 mA
- 0.2 0.3 W
- 160 - °C
- 1.1 2.0 µs
2.0 -
--
--
-0.2 -0.1
-V
0.6 V
20 µA
- mA
- 0.5 0.8 mA
-5
- mV
- 0.2 0.4 V
- 50
- µA
- 0.9 1.2 V
- 50
- µA
- 23.0
- 1.0
- kHz
- µs
Parameter
Thermal resistance
Symbol
RthJ-GND
RthJ-A
Note 2
Note 2
Conditions
Min Typ Max
- 28 -
- 45 -
Notes
1. All voltages are with respect to ground. Currents are positive into, negative out of specified terminal.
2. Not covered by final test program.
3. Switching duty cycle D = 30%, f = 23.0 kHz.
s
Unit
°C/W
°C/W
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet NJM3776.PDF ] | |
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