NJM2135
-1-
Ver.2008-06-19
LOW VOLTAGE AUDIO POWER AMPLIFIER
■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE
The NJM2135 is a Low voltage audio power amplifier for speaker
drivers.No external coupling capacitors are required because of the
differential output.The closed loop gain is adjusted by two external
resistors.The low supply current in power down mode contributes to the
reduction of power consumption of portable battery powered
equipment,cellular phones,for example.
■ FEATURES
● Operating Voltage ( +2V~+16V )
● Low Operating Current in Power Down Mode ( 0.1µA typ. )
● Low Operating Current in Normal Operation Mode ( 2.7mA typ. )
● Output Power Exceeds 250mW ( V
+
=6V,R
L
=32Ω )
● Gain Range ( GVD=0~43dB,Voice Band )
● Load Impedance ( 8~200Ω )
● Bipolar Technology
● Package Outline DIP8,DMP8,SIP8,SSOP8,VSP8
■ PIN CONFIGURATION
NJM2135D NJM2135M
NJM2135L NJM2135E
NJM2135V NJM2135R
NJM2135L
NJM2135D
NJM2135M
NJM2135V
NJM2135R
PIN FUNCTION
1. CD
2. V
REF1
3. V
REF2
4. –V
IN
5. V
OUT1
6. V
+
7. GND
8.
V
OUT2
NJM2135
- 2 -
Ver.2008-06-19
■ ABSOLUTE MAXIMUM RATINGS
( Ta=25ûC )
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage V
+
+18 V
Output Peak Current I
OP
± 250 mA
V
IN
( 1-4pin ) -0.3,V
+
+0.3 V
Maximum Input Voltage V
IN
( 5-8pin ) -0.3,V
+
+0.3 ( In power down ) V
( DIP8 ) 500
( SIP8 ) 800
( DMP8 ) 500 ( note1 )
( SSOP8 ) 360 ( note1 )
Power Dissipation P
D
( VSP8 ) 320
mW
Operating Temperature Range T
opr
-20~+75 ûC
Storage Temperature Range T
stg
-40~+125 ûC
( note1 ) Mounted on PC Board
■ ELECTRICAL CHARACTERISTICS
( V
+
=6.0V,Ta=25ûC unless otherwise specified )
PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
Operating Current I
CC
1 V
+
=3.0V,R
L
=∞,1pin=2.0V - 2.7 4.0 mA
( NO SIGNAL ) I
CC
2 V
+
=16.0V,R
L
=∞,1pin=2.0V - 3.4 5.0 mA
( At Power Down Mode ) I
CCD
V
+
=3.0V,R
L
=∞,1pin=0.8V - 0.1 1.0 µA
Open Loop Gain A
V
1 AMP#A,f<100Hz 77 83 - dB
Closed Loop Gain A
V
2 AMP#B,f=1kHz,R
L
=32Ω -0.35 - +0.35 dB
Output Power P
O
1 V
+
=3.0V,R
L
=16Ω,THD≤10% 55 - - mW
( note2 ) P
O
2 V
+
=6.0V,R
L
=32Ω,THD≤10% 250 - - mW
P
O
3 V
+
=12.0V,R
L
=100Ω,THD≤10% ( note3 ) 400 - - mW
Total Harmonic Distortion THD1 V
+
=6V,R
L
=32Ω,P
O
=125mW,G
VD
=34dB - 0.5 1.0
%
( f=1kHz ) THD2 V
+
≥3V,R
L
=8Ω,P
O
=20mW,G
VD
=12dB - 0.5 -
%
THD3 V
+
≥12V,R
L
=32Ω,P
O
=200mW,G
VD
=34dB - 0.6 - %
Power Supply Rejection Ratio PSRR1 C1=∞,C2=0.01µF,DC 50 - - dB
( V
+
=6.0V,∆V
+
=3.0V ) PSRR2 C1=0.1µF,C2=0,f=1kHz - 12 - dB
PSRR3 C1=1.0µF,C2=5.0µF,f=1kHz - 52 - dB
Mute Attenuation MAT f=1kHz~20kHz,1pin=2.0V - 70 - dB
Output Voltage V
O
1 V
+
=3.0V,R
L
=16Ω 1.00 1.15 1.25 V
( R
f
=75kΩ,DC ) V
O
2 V
+
=6.0V - 2.55 - V
V
O
3 V
+
=12.0V - 5.45 - V
Output High Level V
OH
I
OUT
=-75mA,V
+
=2.0~16.0V - V
+
-1.1 - V
Output Low Level V
OL
I
OUT
=75mA,V
+
=2.0~16.0V - 0.21 - V
Output DC Offset ∆V
O
R
f
=75kΩ,R
L
=32Ω,5pin~8pin -30 0 +30 mV
Input Bias Current I
B
4pin - -30 -200 nA
Equivalent Resistance R
+IN
3pin 100 150 220 kΩ
R
REF
2pin 18 25 40 kΩ
CD Input Voltage H V
CDH
1pin 2.0 - V
+
V
CD Input Voltage L V
CDL
1pin 0.0 - 0.8 V
CD Input Resistance R
CD
V
+
=V
CD
=16.0V,1pin 50 90 175 kΩ
( note2 ) NJM2135M,NJM2135V,NJM2135R : Mounted on PC Board
( note3 ) NJM2135V,NJM2135R is excluded
NJM2135
-
3
-
Ver.2008-06-19
■ APPLICATION CIRCUIT
( note )
1. The NJM2135 is active mode during the CD terminal is High level ( >2.0V )
and it is stand-by mode during the CD terminal is Low level ( <0.8V ).
2. C1 and C2 improve power supply rejection ratio.
In case of C1 is enough large,C2 is unnecessary.
3. Please note that the C1 and C2 make slow power rise up to the NJM2135
regardless the external power supply condition.
4. Input current flow on the internal resistor shown in the equivalent circuit of
CD terminal.
5. No snubber resistor and capacitor are required normally. But the snubber
resistor and capacitor are required if the NJM2135 oscillates by condition of
PCB layout,stray capacitor and speaker wire length.
6. When the NJM2135 change the mode to active or stand-by the CD terminal
ON/OFF,the actual operation takes some delay by the charge and discharge
of C1,C2.
7. When the power turns on in stand-by mode,the NJM2135 operates during
charging time of C1 and C2.
8. If the supply voltage fluctuate large during the stand-by mode,the mode of
active and stand-by of NJM2135 becomes unstable.
NJM2135
- 4 -
Ver.2008-06-19
■ POWER DISSIPATION
The allowable power is restricted by the ambient temperature.Characteristics of the allowable power ( PD : Power
Dissipation ) against ambient temperature is indicated below.
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
