NJU7086
High-Power & Low-Voltage Stereo Audio Power Amplifier
with Electronic Volume
■
GENERAL DESCRIPTION
The
NJU7086
is a stereo audio power amplifier designed
for portable applications. Three input selector and an
electronic volume are built into, and it contributes to a
reduction of the number of external parts. No external
coupling capacitors are required because of the differential
outputs. The closed loop gain is adjusted by two external
resistors. And the standby mode control reduces the supply
current.
The
NJU7086
contains pop & click noise protection
circuitry which eliminates noises during turn-on and turn-off
transitions and RF rectification canceling circuitry.
■
PACKAGE OUTLINE
NJU7086
■
APPLICATION
•
Portable DVD/TV
•
Portable Navigation
•
PC Monitor
■
FEATURES
•
Operating Voltage
V
+
=2.8 to 5.5V
•
Three Input Selector
•
Electronic Volume
0dB~-64dB
•
Operating Current
I
DD1
=8 mA typ.
•
Supply Current in Power Down Mode
I
DD4
=5µA max.
•
Output Power
P
o
=1W/ch typ.
•
Standby function
•
Mute Function
•
Headphone detecting function
•
Switch function of Differential output and Single ended output
•
C-MOS Technology
•
Package Outline
LQFP48
MonOutL
Vref IC
STBY
ModeTC
(V
+
=5V,BTL mode,R
L
=
∞,
No Signal)
(STBY mode)
(V
+
=5V,R
L
=8Ω,THD=2%)
■
BLOCK DIAGRAM
EVROutL GainL
GND
VDD
Bias
INL1
INL2
INL3
Lch SP
EVR
HP Jack
stereo
OutL+
INR1
INR2
INR3
EVR
HP
Sense
OutL-
OutR-
HP Sense
Rch SP
OutR+
Vrefin
VrefOut
MonOutR
I2C Interface
SDA
SCL
EVROutR GainR
GND
VDD
AUX
HPSense
19-May-09
-1-
NJU7086
■
PIN CONFIGURATION
(LQFP48)
1
48
NC
NC
GND
OutL-
NC
V+
V+
OutL+
GND
GainL
EVROutL
NC
MonOutL
INR1
INR2
INL1
INL3
INL2
NC
NC
NC
NC
NC
NC
Vrefout
Vrefin
STBY
VrefIC
AUX
ModeTC
NC
SDA
SCL
NC
NC
NC
GND
OutR-
HPsense
V+
37
36
NJU7086
V+
OutR+
GND
GainR
EVROutR
NC
MonOutR
INR3
12
13
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Symbol
NC
GND
OutL-
NC
V
V
+
+
25
24
Function
Function
-
GND
Lch- Output
-
Power Supply
Power Supply
Lch+ Output
GND
Lch External gain setting resistance
connection
Lch Electronic Volume Output
-
Lch Monitor Output
Lch Input 3
-
Lch Input 2
-
Lch Input 1
-
-
Rch Input 1
-
Rch Input 2
-
Rch Input 3
No.
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Symbol
MonOutR
NC
EVROutR
GND
GND
OutR+
V
V
+
+
Rch Monitor Output
-
Rch Electronic Volume Output
GND
GND
Rch+ Output
Power Supply
Power Supply
Headphone Detecting
Rch- Output
GND
-
-
Auxiliary Output
Reference Voltage for Internal
Circuit
Standby Setting
-
I
2
C DATA Input
I
2
C Clock Input
-
Mode Switching-noise Rejection
Capacitor
Reference Voltage Input for
External Circuit
Reference Voltage Output for
External Circuit
-
*All power supply pin should be connected.
OutL+
GND
GainL
EVROutL
NC
MonOutL
INL3
NC
INL2
NC
INL1
NC
NC
INR1
NC
INR2
NC
INR3
HPsense
OutR-
GND
NC
NC
AUX
VrefIC
STBY
NC
SCL
SDA
NC
ModeTC
Vrefin
Vrefout
NC
-2-
19-May-09
NJU7086
■
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER
Supply Voltage
Maximum Input Voltage
Power Dissipation
Output Peak Current
Operating Temperature Range
Storage Temperature Range
SYMBOL
V
+
RATINGS
+7
-0.3V to V
+
+0.3V
1660*
2500*
2)
550
-40 to +85
-40 to +150
1)
UNIT
V
V
mW
mA
°C
°C
V
IN
P
D
Io
T
opr
T
stg
*
1)
EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 2layers, FR-4) mounting
*
2)
EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 4layers, FR-4) mounting
Junction Temperature:
Tj =
θ
ja
(Thermal Resistance) x Pd (Power Dissipation on your application) x Ta(Ambient Temperature)
Tj should be less than 0.8 times of the storage maximum temperature.
■
RECOMMENDED OPERATING VOLTAGE RANGE
(Ta=25°C)
PARAMETER
Operating Voltage Range
SYMBOL
V
+
TEST CONDITION
-
MIN.
2.8
TYP.
5.0
MAX.
5.5
UNIT
V
■
ELECTRICAL CHARACTERISTICS
(Ta=25°C,V
+
=5V, Unless otherwise specified)
PARAMETER
SYMBOL
I
DD1
I
DD2
Operating Current
I
DD3
I
DD4
Reference Voltage 1
Reference Voltage 2
V
REF
V
REFOUT
TEST CONDITION
No signal, R
L
=∞, Active/BTL mode
No signal, R
L
=∞, Active/SE mode
No signal, R
L
=∞, Charge mode
STBY=HPsense=0V
No signal, R
L
=∞, STBY mode
STBY=HPsense=0V
VrefIC
Vrefout,Vrefin= V
REF
- 0.2V
MIN.
-
-
-
-
2.25
2.80
TYP.
8.0
5.5
200
-
2.5
3.10
MAX.
15.0
12.0
400
5.0
2.75
3.30
UNIT
mA
mA
µA
µA
V
V
•
AC Characteristics
Common Characteristics
(Ta=25°C, V
+
=5V, vol=0dB, Gv=0dB, V
IN
=-20dBV, f=1kHz, R
L
=32Ω, SE mode, unless otherwise specified)
PARAMETER
Input Resistance
Mute Attenuation 1
Mute Attenuation 2
Cross Talk
Monitor Output Gain
Power Supply Rejection Raito
SYMBOL
R
IN
Gv
MIN1
Gv
MIN2
CT
Gv
MON
Vripple
TEST CONDITION
INL1~3, INR1~3
Vol=Mute,mode=Active,Vin=1Vrms
Vol=0dB,mode=Mute,Vin=1Vrms
Vin=1Vrms
Vin=1Vrms
Vripple=1kHz / 100mVrms
MIN.
-
-80
-75
-
-1.0
-
TYP.
50
-
-
70
0.0
55
MAX.
-
-
-
-
+1.0
-
UNIT
kΩ
dB
dB
dB
dB
dB
•
AC Characteristics
Single Ended Operation(SE mode)
(Ta=25°C, V
+
=5V, vol=0dB, Gv=6dB, V
IN
=-20dBV, f=1kHz, R
L
=32Ω, BTL mode, unless otherwise specified)
PARAMETER
Maximum Gain
Output Power
Total Harmonic Distortion
Output Noise Voltage
Channel Separation
SYMBOL
Gv
MAX1
P
O1
THD
1
V
NO1
CS
1
TEST CONDITION
Vol=0dB
THD=2%,f=1kHz
P
O1
=10mW , BW=400Hz to 30kHz
Rg=0Ω, Filter = A-weighted
f=1kHz , Vo=1Vrms , Rg=600Ω
MIN.
-1.5
-
-
-
-
TYP.
0.0
90
0.03
-95
(18)
70
MAX.
+1.5
-
0.3
-
-
UNIT
dB
mW
%
dBV
(µV)
dB
•
AC Characteristics
Differential Operation(BTL mode)
19-May-09
-3-
NJU7086
(Ta=25°C, V
+
=5V, vol=0dB, Gv=6dB, V
IN
=-20dBV, f=1kHz, R
L
=8Ω, BTL mode, unless otherwise specified)
PARAMETER
Maximum Gain
Output Power
Total Harmonic Distortion
Output Noise Voltage
Channel Separation
Output Offset Voltage
SYMBOL
Gv
MAX2
P
O2
THD
2
V
NO2
CS
2
V
OD
TEST CONDITION
Vol=0dB
THD=2%,f=1kHz
P
O2
=400mW, BW=400Hz to 30kHz
Rg=0Ω, Filter = A-weighted
f=1kHz , Vo=1Vrms , Rg=600Ω
No Signal
MIN.
4.5
-
-
-
-
-100
TYP.
6.0
1.0
0.1
-89
(36)
65
-
MAX.
7.5
-
1.0
-
-
100
UNIT
dB
W
%
dBV
(µV)
dB
mV
•
Mode Control
(Ta=25°C, V
+
=5V)
PARAMETER
HP sense terminal
High Level Input Voltage
HP sense terminal
Low Level Input Voltage
STBY terminal
Low Level Input Voltage
STBY terminal
Low Level Input Voltage
AUX High Level Output Voltage
AUX Low Level Output Voltage
SYMBOL
V
IHHP
V
ILHP
V
IHSTBY
V
ILSTBY
V
AUXH
V
AUXL
AUX Output=High
Pull-up Resistance=3.9kΩ
AUX Output=Low
Pull-up Resistance=3.9kΩ
TEST CONDITION
MIN.
0.7V
+
0
0.7V
+
0
V
pullup
-0.5
TYP.
-
-
-
-
-
-
MAX.
V
+
0.3V
+
V
+
0.3V
+
V
pullup
0.5
UNIT
V
V
V
V
V
V
0
V
pullup
: External Pull-up Voltage=5.5V(max)
-4-
19-May-09
NJU7086
TEST CIRCUIT
VrefIC
V+
V+
3.9kΩ
+
1uF
+
1uF
37
48
1
NC
GND
BTLm ode
OutL-
NC
8Ω
V+
V+
V+
SEm ode
+
330uF
OutL+
GND
40kΩ
GainL
EVROutL
20kΩ
NC
1uF
+
NC
Vrefin
STBY
VrefIC
AUX
Vrefout
NJU7086
ModeTC
NC
SDA
SCL
NC
NC
NC
GND
OutR-
HPsense
V+
V+
OutR+
GND
36
BTLm ode
V+
8Ω
V+
+
SEm ode
330uF
40kΩ
GainR
EVROutR
20kΩ
NC
MonOutR
+
32Ω
32Ω
MonOutL
INR2
INR1
INL3
INL2
INL1
12
13
+
+
+
+
+
100kΩ
25
24
+
1uF
100k
INR3
NC
NC
NC
NC
NC
NC
1uF
1uF
1uF
1uF
1uF
1uF
V
+
<Reference Voltage for External Circuit>
V
+
R1
Vrefin
R2
Output voltage (Vrefout) is calculated from the next expression.
NJU7086
Internal Circuit
30kΩ
10kΩ
V
+
/2
Vrefout
(10
k
Ω +
R
1
/ 2)
×
10
k
Ω
Vrefout
=
2
V
+
−
3
V
+
(
)
(
R
1
+
R
2
)
×
10
k
Ω +
R
1
×
R
2
19-May-09
-5-
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