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NJM3776D2 Datasheet

  • NJM3776D2

  • DUAL CONTROLLER FOR HIGH-CURRENT STEPPER MOTOR

  • 9頁

  • NJRC

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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
鈥?Suitable to drive any external MOS FET or bipolar power transistor
鈥?Cross conduction prevented by time delay
鈥?Digital filter on chip eliminates external filtering components
鈥?Package
DIP24
s
BLOCK DIAGRAM
Phase 1
Dis 1 V
R1
C1
SGND 1
Pwr GND 1
1
NJM3776
鈥?/div>
T
1BL
R
S
Q
T
1AL
T
1AU
Logic
T
1BU
V
CC
V
CC
+
V
BB1
+
鈥?/div>
V
BB2
T
2BU
Logic
RC
+
鈥?/div>
T
2AU
T
2AL
T
2BL
S
R
Q
Phase 2
Dis 2 V
R2
C2
SGND 2
Pwr GND 2
Figure 1. Block diagram

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