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PDF NJU7085 Data sheet ( Hoja de datos )
| Número de pieza | NJU7085 | |
| Descripción | Audio Amplifier / SSOP32 | |
| Fabricantes | JRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJU7085 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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NJU7085
High-Power & Low-Voltage Stereo Audio Power Amplifier with 3D Surround
s GENERAL DESCRIPTION
The NJU7085 is a stereo audio power amplifier with
surround sound technology for portable applications. No
external coupling capacitors are required because of the
differential outputs. The closed loop gain is adjusted by two
external resistors. And the standby mode control reduces
the supply current.
The NJU7085 contains pop & click noise protection
circuitry which eliminates noises during turn-on and turn-off
transitions and RF rectification canceling circuitry.
It is suitable for portable telephone, wireless telephone,
button telephone, and other speaker amplifier applications.
s PACKAGE OUTLINE
NJU7085V
s APPLICATION
q Portable DVD/TV
q Cradle Speaker
q Mobile-phone/PHS
s FEATURES
q Operating Voltage
V+=2.8 to 5.5V
q Operating Current
IDD1=4.6 mA typ.
q Supply Current in Power Down Mode IDD4=2µA max.
q Output Power
q Low Output Noise
Po=400mW/ch typ.
25µVrms typ.
q Variable Surround Effect by external resistor
q Standby function
q Mute Function
q C-MOS Technology
q Package Outline
SSOP32
(Mobile mode)
(Standby mode)
(V+=3V,RL=4Ω)
s BLOCK DIAGRAM
PS NFLO NFLI
NFRI
ROUT
eala
RINP
ROUT-
RIN
eala Processor Block
LIN
Bias
Block
V+
Control Block
ROUT+
LOUT+
LOUT-
GND Vref ealaTC DNC
D2 D1 D0
LOUT
eala
LINP
-1-
1 page  
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sTERMINAL DESCRIPTION (SSOP32)
PIN No. SYMBOL
FUNCTION
1 D2 Mode Control Switch
2 D1
3 D0
NJU7085
EQUIVALENT CIRCUIT
TERMINAL
DC
VOLTAGE
100
7,8,
25,26
5,10,
23,28
V+
GND
Power
GND
6 LOUT+ Lch+ Output
9 LOUT- Lch- Output
24
27
ROUT-
ROUT+
Rch- Output
Rch+ Output
Power
GND
V+
0
V+/2
12
LINP
Lch Input to Power Amp
21
RINP
Rch Input to PowerAmp
V+/2
100
-5-
5 Page 
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2.2 Operation explanation
2.2.1 Bypass Mode
Fig.2 shows the signal channel at bypass mode.
NJU7085
LIN
L‐R
RIN
L+R
3D SP
FILTER
eala,Mobile
MIN
VR
MAX
Bypass
Bypass
eala
Mobile
Phase
Shifter
LOUT
eala
LINP
LOUT+
LOUT-
ROUT-
Fig.2 Bypass Mode
ROUT
eala
RINP
ROUT+
2.2.2 eala Mode
Fig.3 shows the signal channel at eala mode.
LIN
L‐R
RIN
L+R
3D SP
FILTER
eala,Mobile
MIN
VR
MAX
Bypass
Bypass
eala
Mobile
Phase
Shifter
LOUT
eala
LINP
LOUT+
LOUT-
ROUT-
Fig.3 eala Mode
ROUT
eala
RINP
ROUT+
- 11 -
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet NJU7085.PDF ] | |
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