DUAL STEPPER MOTOR DRIVER
NJM3771
DUAL STEPPER MOTOR DRIVER
■ GENERAL DESCRIPTION The NJM3771 is a stepper motor driver, which circuit is
especi...
Description
NJM3771
DUAL STEPPER MOTOR DRIVER
■ 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.
■ PACKAGE OUTLINE
NJM3771D2 ( DIP22 )
NJM3771E3 ( SOP24 )
■ FEATURES
● Dual chopper driver
● 650mA output current per channel
● Selectable slow / fast current decay for improved high-
speed microstepping
● Specially matched to Dual DAC NJU39610
● Packages
DIP22-D2 / PLCC28-M2
SOP24 JEDEC 300 mil (Batwing)
NJM3771FM2 ( PLCC28 )
■ BLOCK DIAGRAM
Figure 1. Block diagram
Ver.2011-12-08
-1-
NJM3771
■ PIN CONFIGURATION
Figure 2. Pin configurations
■ PIN DESCRIPTION
Refer to Figure 2.
SOP
DIP
PLCC
2
1
8
3
2
10
4
3
11
5
4
12
6, 7, 18,19
5, 6,
1-3, 9,
17, 18 13-17, 28
Symbol MB1 E1 VMM1 MA1 GND
8
7
18
Phase1
9
8
19
CD1
10
9
20
VR1
11
10
21
C1
12
11
22
VCC
13
12
23
RC
14
13
24
C2
15
14
25
VR2
16
15
26
CD2
17
16
27
Phase2
20
19
21
20
4
MA2
5
VMM2
22
21
23
22
6
E2
7
MB2
Description
Motor output B, channel 1. Motor ...
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