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PDF NJU8754 Data sheet ( Hoja de datos )
| Número de pieza | NJU8754 | |
| Descripción | Analog Signal Input Monaural Class D Power Amplifier | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU8754
PRELIMINARY
Analog Signal Input Monaural Class D Power Amplifier
GENERAL DESCRIPTION
The NJU8754 is an analog signal input monaural
class D power amplifier. The NJU8754 includes
Inversion operatinal amplifier input circuit, PWM
modulator, an output-short protector and a low voltage
detector. The NJU8754 incorporates BTL amplifier,
which eliminate AC coupling capacitors, capable of
driving up to 0.6W at 3.6V supply voltage with simple
external LC low-pass filters.
The NJU8754 features high power-efficiency by
class-D operation and very small package, and is suited
for cellular phone, PDA, etc.
FEATURES
Monaural Analog Signal Input
Monaural BTL Output :1.2W at 5V into 8Ohms
:0.6W at 3.6V into 8Ohms
Standby(Hi-Z), Mute Control
Built-in Short Protector
Built-in Low Voltage Detector
Operating Voltage
:2.7 ~ 5.25V
CMOS Technology
Package Outline
:SSOP10, QFN20
PACKAGE OUTLINE
NJU8754V
NJU8754KM1
PIN CONFIGURATION
VDD
IN
COM
MUTE
STBY
1 10
29
38
47
56
SSOP10
VSS
OUTP
VDDO
OUTN
VSS
15
16
VSS
VSS
NC
VDD
NC
20
1
11
10
VSS
VSS
NC
STBY
NC
6
5
QFN20
Ver.2003-03-12
-1-
1 page  
NJU3857554
ELECTRICAL CHARACTERISTICS
PARAMETER
VDD,VDDO Supply Voltage
Input Impedance
Voltage Gain
Output Power Efficiency
Output THD
Output Power
S/N
Operating Current (Standby)
Operating Current
(No signal input)
Input Voltage
Input Leakage Current
SYMBOL
VDD
ZIN
AV
Eeff
THD
Po
SN
IST
IDD
VIH
VIL
ILK
(Ta=25°C, VDD=VDDO= 3.6V, VSS= 0V, Input Signal=1kHz,
Input Signal Level=200mVrms, Frequency Band=20Hz~20kHz,
Load Impedance=8Ω, 2nd-order 34kHz LC Filter(Q=0.85))
CONDITIONS
MIN TYP MAX UNIT Note
IN pin
Output THD=10%
VDD=VDDO=5.0V, Po=600mW
VDD=VDDO=3.6V, Po=300mW
VDD=VDDO=5.0V
Output THD=10%
VDD=VDDO=3.6V
Output THD=10%
A weight
VDD=VDDO=5.0V
No Filter, No Load
VDD=VDDO=3.6V
No Filter, No Load
MUTE, STBY pins
MUTE, STBY pins
MUTE, STBY pins
2.7
-
-
80
75
-
0.7VDD
0
-
3.6
20
23
83
0.05
0.07
1.2
0.6
80
-
4
2.5
-
-
-
5.25
-
-
-
0.08
0.1
-
1
6
5
VDD
0.3VDD
±0.1
V
kΩ
dB
%
%
W
dB
µA
mA
V
V
µA
4
Note 5) Test system of the output THD and S/N
The output THD and S/N are tested in the system shown in Figure1, where a 2nd-order LC LPF and
another filter incorporated in an audio analyzer are used.
Input Signal
NJU8754
2nd-order
LC LPF
Filter
20kHz
(AES17)
THD
Measuring
Apparatus
NJU8754 Test Board
Audio Analyzer
Figure 1. Output THD and S/N Test System
2nd-order LPF
Filters
: fc=34kHz / Refer to “Typical Application Circuit”.
: 22Hz HPF + 20kHz LPF(AES17)
(with the A-Weight filter for S/N and Dynamic-range tests)
Ver.2003-03-12
-5-
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet NJU8754.PDF ] | |
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