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NJU8755V Datasheet

  • NJU8755V

  • Analog Signal Input Stereo Class D Power Amplifier

  • 88.18KB

  • 6頁

  • NJRC

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NJU8755
PRELIMINARY
Analog Signal Input Stereo Class D Power Amplifier
!
GENERAL DESCRIPTION
The
NJU8755
is an analog signal input stereo class D
power amplifier. The
NJU8755
includes Inversion
operational amplifier input circuit, PWM modulators, an
output-short protector and a low voltage detector. The
NJU8755
incorporates BTL amplifiers, which eliminate
AC coupling capacitors, capable of driving up to
1.2W/channel with simple external LC low-pass filters.
Class-D operation achieves high power-efficiency,
which achieves longer battery life for battery powered
applications, thus the
NJU8755
is suited for portable
audio, note-PC, etc.
!
PACKAGE OUTLINE
NJU8755V
!
FEATURES
#
#
#
#
#
#
#
#
!
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
SS
IN
R
COM
STBY
V
DDR
OUT
RP
V
SSR
OUT
RN
V
DDR
V
DDR
V
DDL
2-Channel Analog Signal Input
V
DD
2-Channel BTL Outputs :1.2W/channel at 5V into 8Ohms
IN
L
Standby(Hi-Z), Mute Control
TEST
Built-in Short Protector
MUTE
Built-in Low Voltage Detector
V
DDL
Operating Voltage
2.7 ~ 5.25V
OUT
LP
CMOS Technology
V
SSL
Package Outline
SSOP20
OUT
LN
V
DDL
V
DDL
!
BLOCK DIAGRAM
V
DD
V
SS
IN
L
-
+
-
+
Pulse
Width
Modulator
OUT
LP
V
SSL
V
DDL
OUT
LN
V
SSL
V
DDR
Pulse
Width
Modulator
COM
+
-
+
IN
R
-
OUT
RP
V
SSR
V
DDR
OUT
RN
V
SSR
Short
Protector
Soft Start
Control
Logic
Low Voltage
Detector
MUTE
STBY
TEST
Ver.2003-03-12
-1-

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