NJW4303_10 Datasheet, PDF (1/1 Pages) New Japan Radio – Hall Element-PWM Type 3-Phase Motor Control IC

NJW4303
Hall Element-PWM Type 3-Phase Motor Control IC
■ GENERAL DESCRIPTION
■ PACKAGE OUTLINE
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
NJW4303V
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 _{■ BLOCK DIAGLAM}
substantial protection circuit.
RFG
FG-OUT _FG
+
CV R EF
VRE F
V CC
CVCC ⁺
VM
+
GND
■ FEATURE
▪ Supply Voltage
: 9.0V ~ 35V
VREF
UVLO
▪ PWM Pre Driver
: Upper = Pch / Lower = Nch
TSD
UH
S/S
3Phase Motor
▪ PWM Control Circuit
DEC
N1
VH
N
S
S
▪ Forward / Reverse Detection : Changeable while Roating
N2
Rotor
Position
N
H
H1+
+
Decode
WH
▪ PWM Oscillation Circuit
: Setting by External Capacitor
H1-
-
▪ Protection Circuit
: ILimit, UVLO, TSD, LD
H
H2+
+
H2-
-
▪ Soft Start Function
H3+
UL
H
+
H3-
-
▪ Short Brake Function
▪ ON/OFF Function
: Stop with S/S Pin
▪ 120º / 60º Phase Difference Change Function
FRC
VL
CF RC
FR
BR
D ea d
Ti m e
OSC
Saw
WL
COSC
Oscillator
PWM Logic
▪ Multi FG Output
: 2 bit Input Change Type
▪ Controllable Dead Time Settings
▪ Package
: SSOP-32
CV ER R
V ERR
GND
+
-
+
-
Lock
D ete ct
Cct
ILIMIT
Lowpass Filter
　　　　　　　　　 Ver.2010/09/03