NJW4303
Hall Element-PWM Type 3-Phase Motor Control IC
■
GENERAL DESCRIPTION
The NJW4303 is a 3-Phase Brushless DC Motor Control
pre-driver IC with PWM control. It generates the most optimal
current flow patterns by receiving rotor magnetic pole detection
signals from hall elements of 3-phase brushless motor.
Operational voltage range for the IC has margin as 9.0V to 35V
(maximum voltage of 40V), and it fits for a 12V/24V power supply.
It is possible to put practical use such as speed control by
internal oscillation circuit, and torque limiter control by current
sensory circuit. With NJW4303, high reliability of various motor
drive controls can be realized by a variety of function and a
substantial protection circuit.
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PACKAGE OUTLINE
NJW4303V
■
BLOCK DIAGLAM
VM
R
FG
FG-OUT
FG
+
C
VREF
VREF
VCC
C
VCC
+
+
GND
■
FEATURE
▪
Supply Voltage
: 9.0V ~ 35V
▪
PWM Pre Driver
: Upper = Pch / Lower = Nch
▪
PWM Control Circuit
▪
Forward / Reverse Detection : Changeable while Roating
▪
PWM Oscillation Circuit
: Setting by External Capacitor
▪
Protection Circuit
: ILimit, UVLO, TSD, LD
▪
Soft Start Function
▪
Short Brake Function
▪
ON/OFF Function
: Stop with S/S Pin
▪
120º / 60º Phase Difference Change Function
▪
Multi FG Output
: 2 bit Input Change Type
▪
Controllable Dead Time Settings
▪
Package
: SSOP-32
VREF
UVLO
UH
TSD
S/S
DEC
N1
N2
H1+
H1-
H2+
H2-
H3+
H3-
VH
3Phase Motor
N
S
S
N
H
+
-
Rotor
Position
Decode
WH
H
+
-
UL
+
-
H
FRC
C
F RC
FR
BR
Dead
Time
VL
OSC
C
OSC
Saw
Oscillator
WL
PWM Logic
VERR
C
VERR
GND
+
-
Lock
Detect
+
-
ILIMIT
Lowpass Filter
C
ct
Ver.2010/09/03
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