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PDF NJU8758 Data sheet ( Hoja de datos )
| Número de pieza | NJU8758 | |
| Descripción | Analog Signal Input Monaural 1.5W Filterless Class D Power Amplifier | |
| Fabricantes | NJR | |
| Logotipo |  |
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Preliminary
NJU8758www.DataSheet4U.com
Analog Signal Input Monaural 1.5W Filterless Class D Power Amplifier
GENERAL DESCRIPTION
The NJU8758 is an analog signal input monaural
1.5W filterless class D power amplifier. The
NJU8758 is capable of driving 0.6W at 3.3V or
1.5W at 5.0V into 8ohms without external LC
low-pass filters. It includes an output-short protector.
The NJU8758 incorporates BTL amplifier, which
eliminate AC coupling capacitors. The NJU8758
features high power-efficiency by class-D operation,
and is suited for security equipment, portable set
with speaker, PC, etc.
PACKAGE OUTLINE
NJU8758V
FEATURES
Operating Voltage:
1.8 to 5.5V
1.5 W at 5V into 8ohms
No output filters
Standby(Hi-Z), Mute Control
Built-in Pop noise reduction
EQ for Active filter
Built-in Low Voltage Detector
Built-in Short Protector for each channel
CMOS Technology
Package Outline:
SSOP14
PIN CONFIGURATION
VDD
IN
EQ1
EQ2
COM
MUTEb
STBYb
1
2
3
4
5
6
7
14 OUTTEST
13 VSS
12 OUTP
11 VDDO
10 OUTN
9 VSS
8 TEST
Ver.2009-11-10
-1-
1 page  
NJU3857558www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER SYMBOL
TERMINAL
RATING
UNIT
Supply Voltage
VDD
VDDO
VDD
VDDO
-0.3 to +7.0
-0.3 to +7.0
V
V
Input Voltage
Operating
Temperature
Vin
Ta
IN, STBYb, MUTEb
-0.3 to VDD + 0.3
-40 to +85
V
°C
Storage
Temperature
Tstg
-40 to +125
°C
Mounted on two-layer board of
Power
Dissipation
PDMAX2
based on the EIAJ,
Tj = 125°C
Mounted on four-layer board of
450
mW
PDMAX4
based on the EIAJ,
Tj = 125°C
Mounted on two-layer board of
570
mW
θja2 based on the EIAJ,
223 °C /W
Thermal
Tj = 125°C
Resistance
Mounted on four -layer board of
θja4 based on the EIAJ,
176
Tj = 125°C
Note 3) All voltage are relative to “VSS= 0V” reference.
Note 4) Mounted on two-layer/4-layer board of based on the EIA/JEDEC STD
°C /W
Note 5) The IC must be used inside of the “Absolute maximum ratings”. Otherwise, a stress may cause
permanent damage to the LSI.
Note 6) De-coupling capacitors for VDD-VSS and VDDO-VSS should be connected for stable operation.
Note 7) The class-D amplifiers are more power efficient, and dissipate power less than general
analog-amplifiers. In theory, the NJU8758 actualize quite high output-power such as 1.2W at =5V
operation with 8ohms load, it looks as if the NJU8758 exceeds the absolute maximum rating of the
power dissipation. However, in practice, the effective output-power of usual music sound is only
about 1/10 of its maximum output power, thus it may never exceed the absolute maximum rating.
The maximum power dissipation in the system is calculated, as shown below.
PDMAX
=
TjMAX [°C] − Ta [°C]
θ ja [°C / W ]
Pdmax: Maximum Power Dissipation, Tjmax: Junction Temperature = 125°C
Ta: Ambient Temperature, θja: Thermal Resistance of package (SSOP14) = 223°C/W
Power dissipation of the NJU8758 itself is calculated, as shown below.
PD
=
125°C − 50°C
223°C / W
=
336.3mW
Ver.2009-11-10
-5-
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet NJU8758.PDF ] | |
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