NJW4302 Datasheet, PDF (1/18 Pages) New Japan Radio – THREE-PHASE DC BRUSHLESS MOTOR CONTROL IC

NJW4302
THREE-PHASE DC BRUSHLESS MOTOR CONTROL IC
s GENERAL DESCRIPTION
The NJW4302 is a three-phase DC brushless motor
pre-driver IC for precision applications.
The NJW4302 consists of PWM driver, motor velocity
control, FG(Frequency Generator) output, and voltage
velocity integration circuit.
The NJW4302 realizes stabilized velocity and it is suitable
for printer, FAX, and other DC motor control systems.
s PACKEGE OUTLINE
NJW4302FA1
Preliminary
•s FEATURES
Speed discriminator and PLL speed
control circuit
• Direct PWM driver
• CR oscillator
•Lock protection output
•Break circuit (short circuit braking)
•Start/stop switch Start/Stop Switch Circuit
•Current limit circuit
•Thermal shut down/Under voltage
lockout circuit
•FG output amplifier/Integrating circuit
•Shunt regulator output : 5V
•Bi-CMOS technology
•PACKAGE OUTLINE QFP44
s PIN CONFIGRATION
WL VH VL UH UL RF ^{H3 H3 H2 H2 H1}
WH
PVCC
VCC
VREG
DGND
AGND
VSH
CR
CROCK
R
C
NJW4302 QFP44
H1+
FGIN+
FGIN-
FGOUT
FGSOUT
PGND
AGND
N2
N1
SS
CLK
sBLOCK DIAGRAM
FILO FILI
TOC
INT IN POUT LD BR FR
INTREF INTOUT ^DOUT
FGIN-
F G IN⁺
Pout
Vre g
VS H
CLK
FGO
-
+
-
+
FGSO D o ut L D
O
LD
FG
C R OC K IN TR EFIN TIN IN TOU TS/S
F
ROCK
OSC
IN TEGR ATION
AMP
SPEED
D I SC RIMI N ATOR
VR EG 1
SPEED
PLL
VC OO U T
PLL COUNTER
S /S
VR EF
ALTER N ATIVE
C OU N TER
CIR CUIT
PWM BLOCK
BR
F/R
V⁺
BR
F/R
L OGIC
H AL L
H YS
AMP
PR OTEC TION
C IR C U IT
TS D / L VD S
P R I- D R IVER
H1⁺
H1 ^-
H2⁺
H2 ^-
H3⁺
H3 ^-
FILI FILO
R
C
N1 N2 GND CR RF TOC
U L VL WL U H VH WH
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