NJW4372
Pulse Input Stepper Motor Driver
■
GENERAL DESCRIPTION
The NJW4372 is a bipolar drive stepper motor driver IC
characterized as highly efficient. The control method
used is a simple pulse train input control (STEP & DIR)
method of programming. The drive stage consists of
DMOS H bridges.
Therefore, motor drive application circuit is composed of highly
effective and low heating value. Supply / interface voltage
corresponds to the logic, 3.3V / 5.0V. NJW4372 has PWM
current control circuits, Torque set, Enable and PD functions.
The functions are easy and convenient to operate and suitable
for a wide range of applications.
■
PACKAGE OUTLINE
NJW4372L
NJW4372V
■
BLOCK DIAGLAM
VDD
VMM
BIAS
RESET
POR
VMM
SENSE1
GATE DRIVE
▪
Supply Voltage
: 2.7V ~ 5.5V
▪
Motor Supply Voltage
: 10V ~ 38V
▪
Output Current
: 500mA / ch
▪
ON Resistance Output
: R
O
= 1.65Ω ( typ. )
▪
Quiescent Current
: I
DD
= 300 µA ( typ. )
▪
Pulse Input ( STEP & DIR ) Control
▪
TTL Compatible Input
▪
ENABLE / PD( Power down and Reset ) function
▪
PWM Constant Current Control Circuit
▪
Torque Control Function ( TOR )
▪
Protection Circuit
: UVLO, THD
▪
Package
: SDIP-22 / SSOP32
STEP
TRANSLATOR
PWM
LOGIC
OUTPUT CONTROL LOGIC
H-BRIDGE
(Pch-Nch)
VMM
VMM
■
FEATURE
OUT1A
OUT1B
DIR
HSM
MO
VMM
OSC
VMM
GATE DRIVE
OUT2A
PWM
LOGIC
VR
H-BRIDGE
(Pch-Nch)
TOR1
CURRENT LEVEL
CONTROL
(100, 70, 40, 20%)
OUT2B
SENSE2
TOR2
ENABLE
BRAKE
PROTECTION
UVLO_VDD
UVLO_VMM
TSD
ALARM
GND
Ver.2010/09/03