NJM3770AD3 NJR, NJM3770AD3 Datasheet - Page 8

• Manufacturer Part Number: NJM3770AD3
• Description: IC STEPPER MTR DVR BATWING/16DIP
• Manufacturer: NJR
• Type: Stepper Motor Controller/Driverr

Specifications of NJM3770AD3

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: 1.5A
• Voltage - Load: 10 V ~ 40 V
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -20°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.325", 8.25mm), 12 Leads + 2 Fins
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 6 V
• Supply Current: 40 mA
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Analog control
As the current levels can be continuously controlled by modulating the V
achieved.
Sensor resistor
The R
choice for 800 mA max motor current at V
i
External recirculation diodes
Recirculation diodes must be connected across each motor terminal and the supply voltage, V
be connected to the motor terminals and the cathodes to the V
used for maximum performance and reliability.
Figure 8. Copper foil used as a heatsink
m
90
80
70
60
50
40
30
The peak motor current, i
= (V
Thermal resistance [ C/W]
PLCC package
DIP package
S
R
5
resistor should be of a noninductive type power resistor. A 0.5 ohm resistor, tolerance
• 0.080) / R
PCB copper foil area [cm ]
10
15
20
S
[A], at 100% level
25
2
30
m
, can be calculated by using the formula:
35
R
16-pin
28-pin
PLCC
= 5V.
20-pin
DIP
EMP
Figure 9. Principal operating sequence.
Half step position
Full step position
–100%
–100%
–20%
100%
–60%
100%
–60%
MM
20%
60%
60%
Ph
Ph
I
I
I
I
I
I
0A
1A
0B
1B
MA
MB
A
B
voltage. Ultra-fast recovery diodes should be
Stand by mode
at 20 %
R
input, limited microstepping can be
Half step mode at 100 %
NJM3770A
MM
1%, is a good
. The anodes shall
Full step mode at 60 %