NJM2776
Headphone Amplifier for Portable Audio
s
GENERAL DESCRIPTION
The
NJM2776
is a low voltage headphone amplifier for
portable audio applications.
The
NJM2776
operates directly for one battery supply with
+
+
independent power supply terminals (V 1 and V 2).
Also it provides shock-noise less standby mode.
The
NJM2776
is suitable for portable MD, portable CD and
others.
s
PACKAGE OUTLINE
NJM2776RB2
s
FEATURES
q
Operating Voltage
V 1(from step-up converter) =1.8 to 4.5V (however, V 1 > V 2)
+
+
+
V 2(from battery)
=0.9 to 4.5V (however, V 1 > V 2)
+
+
+
q
Low Operating Current
I
CC4
(V 1 side)=200碌A(chǔ) typ. (V 1=2.3V, V 2=1.2V, No signal)
+
+
+
I
CC3
(V 2 side)=350碌A(chǔ) typ. (V 1=2.3V, V 2=1.2V, No signal)
+
+
+
q
Supply Current in Standby mode I
CC2
(V 1 side)=25碌A(chǔ) typ. (V 1=2.3V, V 2=1.2V)
+
+
+
I
CC1
(V 2 side)= 6碌A(chǔ) typ. (V 1=2.3V, V 2=1.2V)
q
Output Power Exceeds
P
O
=8.5mW typ. (R
L
=16鈩? THD=10%)
q
Shock-noise less Standby mode
q
Bipolar Technology
q
Package Outline
TVSP10
+
+
+
s
PIN CONFIGURATION AND BLOCK DIAGRAM
V
+
2
1
10
GND
OUT 1
2
9
OUT 2
+
-
-
+
IN 1
3
8
IN 2
STANDBY TC
4
BIAS
7
STANDBY
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
V2
OUT1
IN1
STADBY_TC
+
V1
VREF
STANDBY
IN2
OUT2
GND
+
REG
V
+
1
5
VREF AMP
6
VREF
-1-