NJU8755 Datasheet: Analog Signal Input Stereo Class D Power Amplifier





NJU8755 Analog Signal Input Stereo Class D Power Amplifier Datasheet

Part Number NJU8755
Description Analog Signal Input Stereo Class D Power Amplifier
Manufacture New Japan Radio
Total Page 6 Pages
PDF Download Download NJU8755 Datasheet PDF

Features: NJU8755 PRELIMINARY Analog Signal Input Stereo Class D Power Amplifier ! GENE RAL DESCRIPTION The NJU8755 is an analo g signal input stereo class D power amp lifier. The NJU8755 includes Inversion operational amplifier input circuit, PW M modulators, an output-short protector and a low voltage detector. The NJU875 5 incorporates BTL amplifiers, which el iminate AC coupling capacitors, capable of driving up to 1.2W/channel with sim ple external LC low-pass filters. Class -D operation achieves high power-effici ency, which achieves longer battery lif e for battery powered applications, thu s the NJU8755 is suited for portable au dio, note-PC, etc. ! PACKAGE OUTLINE N JU8755V ! FEATURES ! PIN CONFIGURATIO N # # # # # # # # 2-Channel Analog Si gnal Input 2-Channel BTL Outputs :1.2W /channel Standby(Hi-Z), Mute Control Built-in Short Protector Built-in Low Voltage Detector Operating Voltage 2. 7 ~ 5.25V CMOS Technology Package Out line SSOP20 at 5V into 8Ohms VDD INL TEST MUTE VDDL OUTLP.

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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
#
#
#
#
#
#
#
#
2-Channel Analog Signal Input
2-Channel BTL Outputs :1.2W/channel
Standby(Hi-Z), Mute Control
Built-in Short Protector
Built-in Low Voltage Detector
Operating Voltage
2.7 ~ 5.25V
CMOS Technology
Package Outline
SSOP20
at
5V
into
8Ohms
VDD
INL
TEST
MUTE
VDDL
OUTLP
VSSL
OUTLN
VDDL
! BLOCK DIAGRAM
VDD
VDDL
VSS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
INL
COM
INR
-
+
Pulse
Width
- Modulator
+
+
- Pulse
Width
+ Modulator
-
Short
Protector
VSS
INR
COM
STBY
VDDR
OUTRP
VSSR
OUTRN
VDDR
VDDR
VDDL
OUTLP
VSSL
VDDL
OUTLN
VSSL
VDDR
OUTRP
VSSR
VDDR
OUTRN
VSSR
Soft Start
Control Logic
Low Voltage
Detector
MUTE STBY TEST
Ver.2003-03-12
-1-

                 






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