NJW4302 Ver la hoja de datos (PDF) - Japan Radio Corporation
Número de pieza
componentes Descripción
Fabricante
NJW4302 Datasheet PDF : 18 Pages
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NJW4302
sPIN DESCRIPTION
SYMBOL
PIN No.
H1+,H1-
33, 34
H2+,H2-
35, 36
H3+,H3-
37, 38
UH
41
VH
43
WH
1
UL
40
VL
42
WL
44
VPCC
2
VCC
3
VREG
4
PGND.DGND
AGND
VSH
5,6
27,28
7
CR
8
CROCK
9
R
10
C
11
FILI
13
FILO
12
D OUT
18
P OUT
19
LD
20
INT REF
14
INT IN
17
INT OUT
16
TOC
15
FG IN+
32
Preliminary
DESCRIPTION
Hall input pins
Positive input terminal is defined as IN+,Negative input terminal as IN- respectably.
Positive input is defined as IN+> IN- as Negative.
Output pins(for fixed current source )
Output pins(open collector sink outputs).
Duty control implement with PWM signal.
Power-supply voltage pin
Connect a noise decoupling capacitor between these pins and the ground.
Shunt regulator output pin
Ground pins
These pins are all connected internally to the ground(GND).
Shunt regulator ON/OFF output pin
“H” or open:ON
“L”:OFF
PWM oscillator frequency setting pin
Three blocks use the oscillator: motor constraint detection circuit, clock disconnection protection circuit
and others
Reference clock signal oscillator pin
Connect a capacitor between this pin to the ground.This oscillator provides clock signal when motor is locked.
VCO oscillation frequency setting pin
Connect a resistor between this pin and the ground.
VCO oscillation frequency setting pin
Connect a resister between this pin and ground.
Set the value of the capacitor so that the oscillator frequency does not exceed 1MHz.
VCO filter amplifier input pin
This pin is connected to VCO PLL output with 10KΩ resistor internally in the IC.
VCO filter amplifier output pin
This pin is connected to VCO circuit internally in the IC.
Speed discriminator output pin
Output“L”level for over speed.
PLL output pin
Output the phase comparison result for 1/2fCLK and1/2fFG.
Lock detection output pin
Open collector becomes“L”within the speed lock range(±6.25).
Integrating amplifier forward rotation input(a potential of 1/2V+)
Negative input for Integration amplifier
Output for Integration amplifier
Torque command input pin
This pin is normally connected to the INT OUT pin. When the TOC voltage level falls,the UL,VL and Wl PWM duties are
changed to increase.
Input pin for FG amplifier forward rotation (a potential of 1/2V+)
Connect a noise decoupling capacitor between V+ terminal and the ground.
-2-
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