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NJM37770E2 Datasheet Preview

NJM37770E2 Datasheet

STEPPER MOTOR DRIVER

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NJM37770
STEPPER MOTOR DRIVER
GENERAL DESCRIPTION
NJM37770 is a stepper motor driver, which consists of a
LS-TTL compatible logic input stage, a current sensor, a
monostable multivibrator and a high power H-bridge output
stage. The NJM37770 is a high power version and
pincompatible with the NJM37717 and also NJM37770 is
a high voltage version with NJM3770A. Two NJM37770
and a small number of external components form a
complete control and drive unit stepper motor systems.
FEATURES
Half-step and full-step operation
Switched mode bipolar constant current drive
PACKAGE OUTLINE
NJM37770E2
( SOP20-E2 )
Wide range of current control
Wide voltage range
Thermal overload protection
Packages
5 to 1500mA
10 to 60 V
SOP20-E2 JEDEC 300mil
BLOCK DIAGRAM
Figure 1. Block diagram
Ver.2012-06-29
-1-




JRC

NJM37770E2 Datasheet Preview

NJM37770E2 Datasheet

STEPPER MOTOR DRIVER

No Preview Available !

NJM37770
PIN CONFIGURATION
Figure 2. Pin configuration
PIN DESCRIPTION
SOP
1
2
3,18
4-7
14-17
8
9
10
11
12
13
19
20
Symbol
MB
T
VMM
GND
VCC
I1
Phase
I0
C
VR
MA
E
Description
Motor output B, Motor current flows from MA to MB when Phase is high.
Clock oscillator. Timing pin connect a 56 kresistor and a 820 pF in parallel between T and
Ground.
Motor supply voltage, 10 to 40 V. Pin 3 and pin 18 should be wired together.
Ground and negative supply. Note these pins are used for heatsinking.
Make sure that all ground pins are soldered onto a suitable large copper ground plane for
efficient heat sinking.
Logic voltage supply normally +5 V.
Logic input. It controls, together with the I0 input, the current level in the output stage.
The controllable levels are fixed to 100, 60, 20, 0%.
Controls the direction of the motor current of MA and MB outputs.
Motor current flows from MA to MB when the phase input is high.
Logic input. It controls, together with the I1 input, the current level in the output stage.
The controllable levels are fixed to 100, 60, 20, 0%.
Comparator input. This input senses the instantaneous voltage across the sensing resistor,
filtered through a RC Network.
Reference voltage. Controls the threshold voltage of the comparator and hence
the output current. Input resistance: typically 6.8 k±20%.
Motor output A, Motor current flows from MA to MB when Phase is high.
Common emitter. Connect the Sense resistor between this pin and ground.
-2-
Ver.2012-06-29


Part Number NJM37770E2
Description STEPPER MOTOR DRIVER
Maker JRC
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