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NJU8758 PDF даташит

Спецификация NJU8758 изготовлена ​​​​«NJR» и имеет функцию, называемую «Analog Signal Input Monaural 1.5W Filterless Class D Power Amplifier».

Детали детали

Номер произв NJU8758
Описание Analog Signal Input Monaural 1.5W Filterless Class D Power Amplifier
Производители NJR
логотип NJR логотип 

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NJU8758 Даташит, Описание, Даташиты
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-









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NJU8758 Даташит, Описание, Даташиты
NJU8758
BLOCK DIAGRAM
EQ1
EQ2
VDD
www.DataSheet4U.com
VDDO
IN
COM
TEST
BIAS
SOFT
START
VSS
OSCILLATOR
PULSE
WIDTH
MODULATOR
LEVEL
SHIFTER
LEVEL
SHIFTER
SHORT
PROTECTION
CONTROL
LOGIC
VDD
LOW BAT.
PROTECTION
VDDO
LOW BAT.
PROTECTION
OUTP
OUTN
STBYb MUTEb
VSS
PIN DESCRIPTION
No
SYMBOL
I/O
FUNCTION
1 VDD - Power supply : VDD=3.3V (*1)
2 IN I
Signal input
3 EQ1 I/O
for Active filter
4 EQ2 I/O
for Active filter
5
COM
-
Analog common
6
MUTEb
I
Mute control (*3)
MUTEb=Low: MUTE Mode
7
STBYb
I
Standby control (*3)
STBYb=MUTEb=Low: Standby Mode
8
TEST
I
TEST terminal for maker (*4)
9 VSS - Power GND : VSS=0V (*1)(*2)
10
OUTN
O
Negative output
11
VDDO
-
Output power supply : VDDO =3.3V (*1)
12
OUTP
O
Positive output
13 VSS -
Power GND : VSS=0V (*1)(*2)
14
OUTTEST
O
Short Detect output
*1) The relations of ”VSS= 0V” and “VDD= VDDO” must be maintained.
*2) The VSS should be connected at a nearest point to the IC.
*3) The MUTEb and the STBYb must be connected to VDD, when these terminals are not used.
*4) The Test terminal must be connected to VSS.
-2-
Ver.2009-11-10









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NJU8758 Даташит, Описание, Даташиты
NJU3857558www.DataSheet4U.com
FUNCTIONAL DESCRIPTION
(1) Signal Output (OUTP, OUTN)
The OUTP and OUTN generate PMW output signal.
(2) Standby (STBYb)
By setting the STBYb and MUTEb terminal to “L”, the standby mode is enabled. In the standby mode, the
entire functions of the NJU8758 enter a low-power state, and the output terminals(OUTP and OUTN) are in
high impedance.
(3) Mute (MUTEb)
By setting the MUTEb terminal to “L”, the Mute function is enabled, and the output terminals(OUTP and
OUTN) output square wave(Duty: 50%).
The NJU8758 has a built-in circuit for the pop-noise reduction at power-on. However the control with the
sequence can realize more effective the pop-noise reduction.
VDD,VDDO
STBYb
MUTEb
over 100 ms
Timing for pop-noise reduction
Ver.2009-11-10
-3-










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