NJM2772
LOW-VOLTAGE HEADPHONE AMPLIFIER for PORTABLE-AUDIO
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GENERAL DESCRIPTION
The
NJM2772
is a low voltage headphone amplifier for
portable audio.
The
NJM2772
includes mute circuit, center amplifier and
beep input, reduce the external parts, standby circuit and
center amplifier with ON/OFF, applies to low current
consumption. The mute function reduces the turn-noise at
standby mode.
The NJM2772 is suitable for portable MD, CD, and others
portable audio system with headphone amplifier.
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FEATURES
q
Operating Voltage
q
Operating Current
q
Low Standby Current
q
High Output Power
q
Fixed Gain
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Package Outline
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Bipolar Technology
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PACKAGE OUTLINE
NJM2772V
V
+
=1.8-4.5V
1.2mA typ. @Center Amp. Off
2.0mA typ. @Center Amp. On
18碌A typ.
6mWmin. @R
L
=16鈩? THD=10%
11.5dB typ.
SSOP14
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PIN CONFIGURATION & BLOCK DIAGRAM
STBY 1
INA 2
CenterSW 3
Vref 4
BEEP 5
INB 6
MUTE 7
+
PA-B
14 DNC
+
PA-A
13 OUTA
12 V
+
Vref
PA-C
11 OUTC
10 GND
9 OUTB
8 MuteTC
Pin Function
1.STBY
2.INA
3.CenterSW
4.V
REF
5. BEEP
6.INB
7.MUTE
8.MuteTC
9.OUTB
10.GND
11.OUTC
12. V
+
13.OUTA
14.DNC
Note)DNC(14pin):Do not connect
-1-
1
2
3
4
