NJU7392
2ch Pushbutton Interface EVR with eala Stereo Expander
■ GENERAL DESCRIPTION
■ PACKAGE OUTLINE
The NJU7392 is a 2-channel electronic volume which include
a Volume control, 2-in stereo input selector (with 1 x Differential
input), eala Stereo Expander control (Stereo enhancement for
narrow speakers), Bass boost control with ALC feature and a
Stand-by function (Power-saving mode).
The NJU7392 has also built-in push button interface for its
volume, Bass Boost and eala Stereo Expander controls
- making application possible without the use of micro-controller.
The NJU7392 is suitable for low power application and also for
application with narrow speaker such as mobile audio player
and cradle speaker for mobile game.
■ FEATURES
• Operating Voltage
• Low operating current
+2.7 to +5.5V
5mA typ. (Active mode)
1µA typ. (stand-by mode)
• Low output noise
20µVrms typ. (eala Stereo Expander : ON)
• Input Selector
2ch (single-end / quasi-differential)
• Sound Space adjustment for narrow speaker
• Pushbutton interface EVR
0 to -68dB, MUTE
• Bass Boost with ALC
• CMOS Technology
• Package Outline
SSOP32
■ BLOCK DIAGRAM
V+
4 state
Button
mode
V+
V+
Power Indicator
V+
Expander Indicator
Bass Indicator
Bias V+
Power Button
V+
Test Mode
Vref GND
Input 1L
Output L
Diff
Input 1R
eala
Stereo
Expander
Input
Selector
Input 2L
Bass Boost
with
Limitter
VOL(+6dB)
Output R
Input 2R
V+
V+
V+
V+
V+
Expander Button
Down
Treble
Input1/Input2
for palmtop
NJU7392 Ver.1.5 _E
for laptop
Up
Bass
Button
for
Bass
for
Limitter
–1–
NJU7392
■ PIN CONFIGURATION
32
17
1
–2–
16
No.
Symbol
Function
No
Symbol
Function
1
IN1L
Lch Input 1
17
BBIND
Bass Boost Indicator
2
IN1G
Common Input 1
18
EXIND
Stereo Expander Indicator
3
IN1R
Rch Input 1
19
PWIND
Power Indicator
4
IN2L
Lch Input 2
20
TREBLE
Treble Gain Setting
5
IN2R
Rch Input 2
21
SWMODE
Control Mode Setting
6
EXOUTL
Stereo Expander Output L
22
IREF
Reference Current
7
VOLINL
Volume Input L
23
VREF
Reference Voltage
8
EXOUTR
Stereo Expander Output R
24
V+
Power Supply
9
VOLINR
Volume Input R
25
GND
Ground
10
SELSW
Input Selector Setting
26
INT
Limiter Recovery Time Setting
11
PWSW
Power Switch
27
SENSE
Limiter Threshold Setting
12
EXSW
Stereo Expander Switch
28
BB1
Bass Boost Filter Terminal 1
13
BBSW
Bass Boost Switch
29
BB2
Bass Boost Filter Terminal 2
14
UP
Volume Up Switch
30
BB3
Bass Boost Filter Terminal 3
15
DOWN
Volume Down Switch
31
OUTR
Rch Output
16
TEST
Test Terminal
32
OUTL
Lch Output
NJU7392 Ver.1.5_E
NJU7392
■ ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
SYMBOL
RATING
UNIT
+7
V
+
Power Supply Voltage
V
Power Dissipation
1)
950*
PD
Maximum Input Voltage
VIMAX
Operating Temperature Range
0~V *
Tstg
V
-40 ~ +85
o
C
-40 ~ +125
o
C
Topr
Storage Temperature Range
mW
+ 2)
1)
EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
2)
* Don’t apply the input voltage that exceeds supply voltage.
■ ELECTRICAL RECOMMENDED OPERATING CONDITION (Ta=25°C)
*
PARAMETER
Operating Voltage
SYMBOL
V
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
-
2.7
3.3
5.5
V
MIN.
TYP.
MAX.
UNIT
+
■ ELECTRICAL CHARACTERISTICS
●DC CHARACTERISTICS (Ta=25°C, V+=3.3V, unless otherwise specified)
PARAMETER
Operating Current
Reference Voltage
SYMBOL
TEST CONDITION
IDD1
No Signal, Active
-
5.0
8.0
mA
IDD2
No Signal, Standby
-
0.1
1.0
µA
VREF
No signal
1.5
1.65
1.8
V
●AC CHARACTERISTICS
+
(Ta=25°C, V =3.3V, VIN=500mVrms, f=1kHz, Expander: OFF, Treble:0dB, Bass Boost: OFF, VOL:0dB, unless otherwise specified)
TEST CONDITION
PARAMETER
SYMBOL
IN
L
Maximum Input Voltage 1
VIM1
Maximum Input Voltage 2
VIM2
Maximum Input Voltage 3
VIM3
Output Noise Voltage 1
VNO1
Output Noise Voltage 2
VNO2
Output Noise Voltage 3
VNO3
Output Noise Voltage 4
VNO4
Total Harmonic Distortion 1
THD+N1
Total Harmonic Distortion 2
THD+N3
Total Harmonic Distortion 3
THD+N3
NJU7392 Ver.1.5_E
R
OUT
VIN
-
L
BW=400Hz-30kHz
-
VIN
R
Expander: Palmtop
THD=1%,
BW=400Hz-30kHz
Expander: Palmtop
Bass: ON, f=1kHz
THD=1%,
BW=400Hz-30kHz
VIN
0
L
0
VIN
R
VIN
VIN
L
VIN
VIN
R
Rg=0Ω, A-weighted
0
0
L
0
0
R
THD=1%
Rg=0Ω, A-weighted
0
0
L
VOL=-68dB
0
0
R
Expander: Palmtop
0
0
L
Rg=0Ω, A-weighted
0
0
R
Expander: Palmtop
Bass: ON, Rg=0Ω,
A-weighted
0
0
L
0
0
R
VIN
-
L
-
VIN
R
Expander: Palmtop
VIN
0
L
BW=400Hz-30kHz
0
VIN
R
Expander: Palmtop
Bass: ON
BW=400Hz-30kHz
VIN
0
L
0
VIN
R
BW=400Hz-30kHz
MIN.
TYP.
MAX.
UNIT
550
580
-
mVrms
550
580
-
mVrms
550
580
-
mVrms
-
-100
(10)
-94
(20)
dBV
(µVrms)
-
-100
(10)
-94
(20)
dBV
(µVrms)
-
-90
(32)
-80
(100)
dBV
(µVrms)
-
-90
(32)
-80
(100)
dBV
(µVrms)
-
0.05
0.1
%
-
0.1
0.5
%
-
0.1
0.5
%
–3–
NJU7392
TEST CONDITION
PARAMETER
SYMBOL
IN
L
VIN
-
L
-
VIN
R
VIN
-
L
-
VIN
R
Expander: Laptop
VIN
VIN
L
f=10kHz
VIN
VIN
R
Expander: Palmtop
VIN
VIN
L
f=10kHz
VIN
VIN
R
Bypass Gain
GVBYP
Treble=0dB
Treble Gain
GVTRE
f=10kHz
Expander Gain 1
GVEXP1
Expander Gain 2
GVEXP2
Expander Gain 3
GVEXP3
Expander: Laptop
Expander Gain 4
GVEXP4
Expander: Palmtop
Bass Gain
GVBASS
Maximum Attenuate level
GVVOL-68
Mute Level
Mute
Channel Balance
GCB
Bass Limit Level
VLIM
Cross Talk
CT
Channel Separation
CS
R
OUT
VIN
0
L
0
VIN
R
VIN
0
L
0
VIN
R
Bass: ON
VIN=100mVrms
f=100Hz
VIN
VIN
L
VIN
VIN
R
VOL=-68dB
VIN
-
L
-
VIN
R
BW=400Hz-30kHz
VOL=Mute
BW=400Hz-30kHz
VIN
-
L
-
VIN
R
VIN
-
L
-
VIN
R
Bass: ON
VIN
VIN
L
f=100Hz
Selected Input:
No Signal, Rg=0Ω
BW=400Hz-30kHz
VIN
VIN
R
VIN
-
L
-
VIN
R
0
VIN
L
VIN
0
R
VIN=0.7Vrms
Rg=0Ω
BW=400Hz-30kHz
MIN.
TYP.
MAX.
UNIT
-1.0
0.0
1.0
dB
2.0
3.0
4.0
dB
1.7
3.7
5.7
dB
3.0
5.0
7.0
dB
2.1
4.1
6.1
dB
3.3
5.3
7.3
dB
4.0
6.0
8.0
dB
-70
-68
-66
dB
-
-90
-86
dB
-1.0
0.0
1.0
dB
0.75
1.0
1.25
Vrms
70
80
-
dB
70
80
-
dB
MIN.
TYP.
MAX.
UNIT
● Indicator Output Block (Ta=25°C, V+=3.3V, unless otherwise specified)
PARAMETER
SYMBOL
High Input Voltage
VOH
Low Input Voltage
VOL
● Control Block (Ta=25°C, V
TEST CONDITION
ISOURCE=1mA (pin 17, pin 18, pin 19)
ISINK=1mA (pin 17, pin 18, pin 19)
+
V *0.8
+
-
V
+
V
0
-
V *0.2
V
MIN.
TYP.
MAX.
UNIT
V+*0.8
-
V+
V
+
PARAMETER
High Input Voltage
=3.3V, unless otherwise specified)
SYMBOL
TEST CONDITION
VIH
+
Low Input Voltage
VIL
0
-
V *0.2
V
Pull-Up Resistance
RPULLUP
-
100
-
kΩ
Mode Resistance range 1/4
RMODE1
pin 20, pin 21
0
-
40
kΩ
Mode Resistance range 2/4
RMODE2
pin 20, pin 21
60
-
85
kΩ
Mode Resistance range 3/4
RMODE3
pin 20, pin 21
110
-
130
kΩ
Mode Resistance range 4/4
RMODE4
pin 20, pin 21
165
-
∞
kΩ
Pulse Distinction Time
15
20
25
ms
Auto Increment Distinction Time
0.7
1
1.2
s
Auto Increment cycle
120
167
200
ms
–4–
NJU7392 Ver.1.5_E
NJU7392
TERMINAL DESCRIPTION
PIN NO.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
V+
Lch Input 1
Rch Input 1
50k Ω
10pF
V+
IN1G
V+
1k Ω
Common Input 1
V+/2
10pF
10pF
500k Ω
2
V+/2
V+/2
10pF
IN1L
IN1R
V+
50k Ω
1
3
TERMINAL
DC
VOLTAGE
VREF
V+
IN2L
IN2R
Lch Input 2
Rch Input 2
50k Ω
10pF
V+/2
V+/2
10pF
50k Ω
4
5
V+
VREF
V+
6
8
17
18
19
28
30
31
32
EXO UT L
EXOUTR
BBIND
EXIND
P W IND
BB1
BB3
OU TR
OU TL
NJU7392 Ver.1.5_E
Stereo Expander Output L
Stereo Expander Output R
Bass Boost Indicator
Stereo Expander Indicator
Power Indicator
Bass Boost Filter Terminal 1
Bass Boost Filter Terminal 3
Rch Output
Lch Output
V+
52.5Ω
V+/2
V+/2
0V or V+
0V or V+
0V or V+
V+/2
V+/2
V+/2
V+/2
–5–
NJU7392
PIN NO.
SYMBOL
FUNCTION
V+
7
9
VOLINL
VOLINR
Volume Input L
Volume Input R
TERMINAL
DC
VOLTAGE
EQUIVALENT CIRCUIT
V+
V+
V+/2
V+/2
52.5Ω
50k Ω
50k Ω
VREF
V+
SELSW
52.5Ω
Input Selector Setting
0V
100k Ω
10
V+
V+
PWSW
UP
DOWN
TEST
Power Switch
Volume Up Switch
Volume Down Switch
Test Terminal
–6–
Stereo Expander Switch
Bass Boost Switch
52.5Ω
200k Ω
E X SW
B B SW
V+
200k Ω
V+
12
13
0V
0V
0V
0V
52.5Ω
100k Ω
11
14
15
16
V+
V+
V+/2
V+/2
NJU7392 Ver.1.5_E
NJU7392
PIN NO.
SYMBOL
FUNCTION
20
21
27
TREBLE
SWMODE
SENSE
Treble Gain Setting
Control Mode Setting
Limiter Threshold Setting
TERMINAL
DC
VOLTAGE
EQUIVALENT CIRCUIT
V+
V+
V+
V+
It depends
on a test
circuit.
V+
5k Ω
52.5Ω
52.5Ω
5k Ω
V+
V+
VREF
Reference Voltage
24
V+
Power Supply
200k Ω
23
NJU7392 Ver.1.5_E
1.2V
V+
20k Ω
Reference Current
52.5Ω
V+/2
20k Ω
IREF
200k Ω
22
V+
–7–
NJU7392
PIN NO.
SYMBOL
FUNCTION
25
GND
Ground
0V
V+
26
INT
V+
1k Ω
Limiter Recovery Time Setting
V+
29
BB2
Bass Boost Filter Terminal 2
TERMINAL
DC
VOLTAGE
EQUIVALENT CIRCUIT
0V
V+
1k Ω
V+/2
1k Ω
10pF
VREF
–8–
NJU7392 Ver.1.5_E
NJU7392
■ PIN DESCRIPTION
SWMODE (pin 21)
PIN CONDITION
0Ω to 45kΩ
FUNCTION
PWSW (Pin 11) and EXSW (Pin 12) - both as Momentary SW mode.
55kΩ to 90kΩ
PWSW (Pin 11) - Momentary SW mode, EXSW (Pin 12) - Alternative SW mode.
110kΩ to 135kΩ
PWSW (Pin 11) - Alternative SW mode, EXSW (Pin 12) - Momentary SW mode.
165kΩ to OPEN
PWSW (Pin 11) and EXSW (Pin 12) - both as Alternative SW mode.
Momentary SW mode data format
●Momentary SW mode 1
High
Mode Change
[ ex. ON ]
Mode Change
[ ex. OFF ]
Mode Change
[ ex. ON ]
Mode Change
[ ex. OFF ]
Mode Change
[ ex. ON ]
Mode Change
[ ex. OFF ]
Mode Change
[ ex. ON ]
Low or OPEN
●Momentary SW mode 2
High
Mode Change
[ ex. ON ]
OPEN
●Momentary SW mode 3
OPEN
Mode Change
[ ex. ON ]
Low
Alternative SW mode data format
●Alternative SW mode 1
Mode Change
[ ex. ON ]
Mode Change
[ ex. OFF ]
Mode Change
[ ex. ON ]
Mode Change
[ ex. OFF ]
Mode Change
[ ex. ON ]
Mode Change
[ ex. OFF ]
Mode Change
[ ex. ON ]
High
Low or OPEN
●Alternative SW mode 2
Mode Change
[ ex. ON ]
High
OPEN
●Alternative SW mode 3
Mode Change
[ ex. ON ]
OPEN
Low
NJU7392 Ver.1.5_E
–9–
NJU7392
SELSW (pin 10)
PIN CONDITION
FUNCTION
L(OPEN)
Input 1 is selected.
H
Input 2 is selected.
* The “Momentary SW mode” does not support.
PWSW (pin 11)
●Momentary SW mode setting (* Momentary SW mode 1)
PIN CONDITION
FUNCTION
OPEN(L)→H
System status is changed to active mode and standby mode alternately.
H→OPEN(L)
No change.
●Alternative SW mode setting (* Alternative SW mode 1)
PIN CONDITION
H
OPEN(L)
FUNCTION
Active mode
Standby Mode.
EXSW (pin 12)
●Momentary SW mode setting
PIN CONDITION
FUNCTION
OPEN→H
Stereo Expander setting is changed to ON and OFF alternately. (Palmtop Mode)
(* Momentary SW mode 2)
H→OPEN
No change. (* Momentary SW mode 2)
OPEN→L
Stereo Expander setting is changed to ON and OFF alternately. (Laptop Mode)
(* Momentary SW mode 3)
L→OPEN
No change. (* Momentary SW mode 3)
●Alternative SW mode setting
PIN CONDITION
FUNCTION
H
Stereo Expander setting is set to ON. (Palmtop Mode) (* Alternative SW mode 2)
L
Stereo Expander Setting is set to ON. (Laptop Mode) (* Alternative SW mode 3)
OPEN
Stereo Expander Setting is set to OFF.
BBSW (pin 13)
* As for the bass boost setting, a control data to 13pin arranges a control mode ("Momentary" or "Alternative") regardless of the
condition on 21pin.
●Momentary SW mode setting (* Momentary SW mode 2)
PIN CONDITION
FUNCTION
OPEN→H
Bass Boost Setting is changed to ON and OFF alternately.
H→OPEN
No change.
●Alternative SW mode setting (* Alternative SW mode 3)
PIN CONDITION
FUNCTION
OPEN→L
Bass Boost Setting is set to ON.
L→OPEN
Bass Boost Setting is set to OFF.
– 10 –
NJU7392 Ver.1.5_E
NJU7392
UP (pin 14)
●Momentary SW mode setting (* Momentary SW mode 1)
PIN CONDITION
FUNCTION
OPEN(L)→H
Volume setting is increased 1 step. Long push increase volume setting continuously.
H→OPEN(L)
No change.
* The “Alternative SW mode” does not support.
DOWN (pin 15)
●Momentary SW mode setting (* Momentary SW mode 1)
PIN CONDITION
FUNCTION
OPEN(L)→H
Volume setting is decreased 1 step. Long push decrease volume setting continuously.
H→OPEN(L)
No change.
* The “Alternative SW mode” does not support.
TEST (pin 16)
PIN CONDITION
FUNCTION
L
Normal operation mode
H
Test mode. Do not use for normal operation.
TREBLE (pin 20)
PIN CONDITION
0Ω to 45kΩ
FUNCTION
Frequency response is set to flat under Stereo Expander setting OFF condition.
55kΩ to 90kΩ
Treble gain is set to +2dB under Stereo Expander setting OFF condition.
110kΩ to 135kΩ
Treble gain is set to +3dB under Stereo Expander setting OFF condition.
165kΩ to OPEN
Treble gain is set to +4dB under Stereo Expander setting OFF condition.
NJU7392 Ver.1.5_E
– 11 –
NJU7392
■ CONTROL DATA
●INITIAL CONDITION (POWER ON)
FUNCTION
TERMINAL
CONDITION
Stereo Expander
pin 12
OFF
Bass Boost
pin 13
OFF
Volume
pin 14, pin15
-12dB
●Volume gain step setting
Step No.
Volume [dB]
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
MUTE
-68
-64
-60
-56
-52
-48
-45
-42
-39
-36
-34
-32
-30
-28
-26
-24
-22
-20
-18
-16
-14
-12(7)
-10
-8
-6
-5
-4
-3
-2
-1
0
(7)
– 12 –
Initial Setting
NJU7392 Ver.1.5_E
NJU7392
■ TIMING CHART (Momentary SW mode)
●Standby release (Standby mode Æ Active mode)
PWSW (pin11)
High
Low or
OPEN
PWIND (pin19)
20ms
High
Low
280ms
Output
(pin31, pin32)
40ms
V+/2
0V
●Standby (Active mode Æ Standby mode)
PWSW (pin11)
High
Low or
OPEN
20ms
High
PWIND (pin19)
Low
40ms
Output
(pin31, pin32)
280ms
V+/2
0V
NJU7392 Ver.1.5_E
– 13 –
NJU7392
■ TIMING CHART (Momentary SW mode)
●Stereo Expander ON/OFF
Palmtop mode
High
EXSW (pin12) V+/2
Low
20ms
Laptop mode
High
EXIND (pin18)
OFF Æ ON
ON Æ OFF
Low
40ms
Output
(pin31, pin32)
80ms
40ms
V+/2
0V
●Bass Boost ON/OFF
High
BBSW (pin13) V+/2
0V
20ms
OFF Æ ON
High
BBIND (pin17)
ON Æ OFF
Low
40ms
80ms
40ms
Output
+
(pin31, pin32) V /2
0V
– 14 –
NJU7392 Ver.1.5_E
NJU7392
■ TIMING CHART (Alternative SW mode)
●Standby release (Standby mode Æ Active mode)
PWSW (pin11)
High
Low or
OPEN
PWIND (pin19)
20ms
High
Low
280ms
Output
(pin31, pin32)
40ms
V+/2
0V
●Standby (Active mode Æ Standby mode)
PWSW (pin11)
High
Low or
OPEN
PWIND (pin19)
20ms
High
Low
40ms
Output
(pin31, pin32)
280ms
V+/2
0V
NJU7392 Ver.1.5_E
– 15 –
NJU7392
■ TIMING CHART (Alternative SW mode)
●Stereo Expander ON/OFF
Palmtop mode
High
EXSW (pin12) V+/2
Low
20ms
Laptop mode
High
EXIND (pin18)
OFF Æ ON
ON Æ OFF
Low
40ms
Output
(pin31, pin32)
80ms
40ms
V+/2
0V
●Bass Boost ON/OFF
High
BBSW (pin13) V+/2
0V
20ms
OFF Æ ON
High
BBIND (pin17)
ON Æ OFF
Low
40ms
80ms
40ms
Output
+
(pin31, pin32) V /2
0V
– 16 –
NJU7392 Ver.1.5_E
NJU7392
■ TIMING CHART (Alternative SW mode)
●Input Selector
Input 1 Æ Input 2
High
SELSW (pin10)
Low or
OPEN
Input 2 Æ Input 1
20ms
40ms
80ms
40ms
Output
+
(pin31, pin32) V /2
0V
NJU7392 Ver.1.5_E
– 17 –
NJU7392
■ TIMING CHART (Volume UP/DOWN control)
1. Recognition condition of Volume UP/DOWN push button I/F
1-a.) The Volume UP/(DOWN) recognizes the data-command to the case that the DOWN(UP) button has not
been pushed, besides that the UP(DOWN) button is pushed for the longer time than the “Pulse Distinction
Time: 20ms".
1-b.) The Volume UP/(DOWN) recognizes the data-command to the case that the UP(DOWN) button has
pushed earlier than the DOWN(UP) button, besides the UP(DOWN) button is pushed for the longer time
than the “Pulse Distinction Time: 20ms".
> Pulse Distinction Time
(20ms typ.) Recognition
> Pulse Distinction Time
(20ms typ.) Recognition
UP
UP
DOWN
DOWN
1-a
1-b
2. Invalidity condition of Volume UP/DOWN push button I/F
2-a.) The Volume UP/(DOWN) does NOT recognize the data-command to the case that the UP(DOWN) button
has pushed for the shorter time than the “Pulse Distinction Time: 20ms". (The Chattering prevention
function operates.)
2-b.) The Volume UP/(DOWN) does NOT recognize the data-command to the case that the UP(DOWN) button
has pushed for the shorter time than the “Pulse Distinction Time: 20ms" after released button. (The
Chattering prevention function operates.)
2-c.) The Volume UP/(DOWN) does NOT recognize the data-command to the case that the UP(DOWN) button
has pushed before releasing DOWN(UP) button.
< Pulse Distinction Time
(20ms typ.)
< Pulse Distinction Time
(20ms typ.)
UP
UP
UP
DOWN
DOWN
DOWN
2-a
– 18 –
2-b
2-c
NJU7392 Ver.1.5_E
NJU7392
■ TIMING CHART (Volume UP/DOWN control)
3. Start condition of Volume UP/DOWN Auto increment function
3-a.) The Auto increment of volume UP(DOWN) is started to the case that the DOWN(UP) button has not been
pushed, besides that the UP(DOWN) button is pushed for the longer time than the “Auto increment
Distinction Time: 1s".
> Auto increment Distinction Time
(1s typ.)
Auto increment starts
UP
DOWN
3-a
4. Stop condition of Volume UP/DOWN Auto increment function
4-a.) The Auto increment of volume UP(DOWN) is stopped to the case that the UP(DOWN) button has released
for the longer time than the “Pulse Distinction Time: 20ms" for the Auto increment period.
4-b.) The Auto increment of volume UP(DOWN) is stopped to the case that the DOWN(UP) button has pushed
for the Auto increment period.
Auto increment
Distinction Time
(1s typ.)
Increment start
UP
DOWN
(20ms typ.)
Auto increment
Distinction Time
Increment start
(1s typ.)
UP
Increment stop
4-a
NJU7392 Ver.1.5_E
Pulse Distinction Time
DOWN
Increment stop
4-b
– 19 –
NJU7392
■ APPLICATION CIRCUIT
Output R
Output L
V+
V+
V+
0.47µF
V+
TREBLE
PWIND
EXIND
BBIND
UP
DOWN
TEST
17
BBSW
18
SWMODE
19
EXSW
20
IREF
SENSE
21
PWSW
BB1
22
SELSW
BB2
23
VOLINL
BB3
24
EXOUTR
OUTR
25
VOLINL
OUTL
26
EXOUTL
27
IN2R
28
IN2L
29
120k Ω
IN1R
30
100k Ω
IN1G
31
1µF
IN1L
32
1µF
1µF
VREF
120k Ω
0.01µF
V+
15k Ω
GND
47k Ω
INT
15k Ω
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NJU7392
Input 2R
Input 2L
0.47µF 0.47µF 0.47µF
Input 1R
Input 1G
Input 1L
0.47µF 1µF
4.7µF
9.1k Ω
10k Ω
0.47µF 4.7µF
9.1k Ω
0.47µF
V+
V+
V+
V+
V+
V+
10k Ω
[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.
– 20 –
NJU7392 Ver.1.5_E