PRELIMINARY
Notice ; This is not a final specification.
some parametric limits are subject to change.
MITSUBISHI ELECTRIC
M62437FP
SOUND CONTROLLER WITH
SRS FOCUS & SRS SURROUND
SRS F
SRS F
DESCRIPTION
This is an IC for car audio.
F( )cus system can realize more optimal speaker position.
FEATURE
Built-in F( )cus [LF/HF elevation(position) and
Bass Compensation can be changed by the external resisters.]
Built-in SR
SRS ON/OFF mode and FOCUS ON/OFF mode
can be controlled by the DC voltage.
RECOMMENDED OPERATING CONDITION
Supply voltage range••••Vcc=7 ~ 9V
Rated supply voltage••••Vcc=8V
( ))
cus, SRS 3D Stereo Sound Controller
(
cus, SRS 3D Stereo Sound Controller
42P2R
SYSTEM BLOCK DIAGRAM
Lin
Rin
M62437FP
Rear L
Tone
Rear R
Tone
M62419FP
Front L
F( )CUS
Front R
Interface
SRS
ON/OFF
FOCUS
ON/OFF
LF Ele.
MITSUBISHI
ELECTRIC
HF Ele. Bass Comp.
(1/12)
OUT
FOCUS
ON/OFF
SRS
ON/OFF
2.2µ
NC
25 24 23
I/F
BASS Comp.
Position H/L
20 21
FOCUS
Position H/L
19
Vcc
Vcc
2.2µ
OUT
VOL.5
3K
390p
2.4K
10K
VOL.4
1K
C9
C6
C17
R39
0.0039µ
0.01µ
0.1µ
C13
NC
27 26 22
29 28
30
3136
32
3334
35
Vref
17 18
16
15
12 13 1410
11
FOCUS IN
8 9
SRS OUT
7
C12
NC
VOL.1
C10
NP
0.0039µ
1K
0.22µ
2.2µ
C16
R41
390p
2.4K
10K
VOL.3
C2
C3
0.01µ
3K
0.82µ
VOL.2
1K
C9
0.22µ
Block Diagram & Application Example
2.2µ
470p
38 3742
NP
C6
40
FOCUS IN
REF
SRS OUT
IN
VCC
41 39
2.2µ
+
MITSUBISHI
ELECTRIC
C7
C1
470p
)
(
0.018µ
2.2µ
IN
10µ
Cref
61
5
43
2
-
(2/12)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Conditions Ratings Unit
Vcc,Vdd V
Pd
K mW/°CTa>25
Topr
Tstg
Supply Voltage
Power Dissipation
Thermal Derating
Operating Temperature
Storage Temperature
Ta≤25
12
990
9.9
-20 ~ +75
-55 ~ + 125
mW
°C
°C
Thermal Derating
1200
1000
990
800
600
495
400
Power Dissipation Pd [ mW ]
200
25 50 75 100
AMBIENT TEMPERATURE Ta [ C ]
MITSUBISHI
ELECTRIC
125 150
(3/12)
ÉAÉiÉçÉOâÒòHìdó¨
ELECTRICAL CHARACTERISTICS
AIdd
(1) Power Supply Characteristics
Parameter Conditions Unit
Symbol
Icc
(2) Input / Output Characteristics
Parameter
Maximum
Output Voltage
Maximum
Input Voltage
Symbol
VIM1
VIM2
VIM3
Input; pin2,41
Output; pin18, 24
Input; pin2,41 /Output; pin18, 24
SRS ON,FOCUS OFF
THD=1%
Input; pin2,41 /Output; pin18, 24
SRS ON
FOCUS ON(All VOL.=max)
THD=1%
(Ta=25°C,Vcc=8.0V, f=1kHz)
42pin Icc
No Signal
Ta=25°C,Vcc=8.0V, f=1kHz
VOL.1,2=1KΩ(VOL),VOL.3,4=10KΩ(VOL)
VOL.5=1KΩ(VOL)
Conditions
RL =10KΩ,THD=1%
f=150Hz
f=1KHz
f=20KHz
Min
Limit
Min
1.6VOMt
0.4
0.2
0.06
typ
25
Max
45
Limit
typ
1.9
0.6
0.3
0.11
Max
-
-
-
-
mACircuit Current
Unit
Vrms
Vrms
Pass Gain
Output Noise
Voltage
Channel
Separation
Gvt
Gv1
Gv2
Gv3
Vno1
Vno2
Vno3
CT
Vi=100mVrms
SRS, Focus OFF
Input; pin2,41 /Output; pin18, 24
Vi=100mVrms
Input; pin2,41 /Output; pin18, 24
SRS ON,FOCUS OFF
Vi=100mVrms
SRS ON
FOCUS ON(All VOL.=max)
(2pin,41pin)-(18, 24Pin)
Rg=0(2,41pin)
SRS OFF ,FOCUS OFF
DIN-AUDIO filter
Rg=0(2,41pin)
SRS ON ,FOCUS OFF
DIN-AUDIO filter
Rg=0(2,41pin),
SRS ON, FOCUS ON(All VOL.=nax)
DIN-AUDIO filter
Input Side:f=1KHz,Vi=0.5Vrms
Monitor Side:Rg=0, IHF-A filter
Focus:OFF, SRS:OFF
RL=10KΩ
f=150Hz
f=1KHz
f=20KHz
0
2.0-2.0
10
7 13
18
15 21
28
25 31
5.5
18
90
15
50
150
-
-
-
-
dB
µVrms
dB-90 -75
MITSUBISHI
ELECTRIC
(4/12)
(3) DC Control Characteristic of the Switch Block
VIH "H" Level Input Voltage Pin 22,23
V
IL
"L" Level Input Voltage Pin 22,23
Switch Condition and the Mode
SRS 3D Stereo
23
SRS ON/OFF
Switch
22 FOCUS
Limit
Min
FOCUS ON/OFF
Switch
typ
Max
2.1 Vcc
~
0 0.8
~
UnitSymbol Parameter Condition
V
V
SRS ON
SRS OFF
H
L
FOCUS ON
FOCUS OFF
H
L
*Bypass mode can be set by both SRS ON/OFF switch and FOCUS
ON/OFF switch are set to "L".
MITSUBISHI
ELECTRIC
(5/12)
OUT
FOCUS
ON/OFF
SRS
ON/OFF
2.2µ
R27
400
3K
C17
390p
R39
2.4K
400
200
C9
C6
7K
R24
3K
0.0039µ
390
R26
R25
0.01µ
0.1µ
R23
C13
R15
25 24 23
27 26 22
29 28
30
3136
32
3334
35
BB BC
BA
Vref
I/F
20 21
19
17 18
16
15
12 13 1410
11
FOCUS IN
8 9
SRS OUT
7
C12
NP
R20
R17
R16
C10
2.2µ
C16
R41
7K
3K
0.0039µ
390
200
390
0.22µ
2.2µ
FOCUS
Position H/L
390p
2.4K
R21
C3
R18
C2
0.01µ
BASS Comp.
Position H/L
OUT
3K
0.82µ
R14
390 200
R13
C9
0.22µ
[For Exsample]The other Application Circuit
2.2µ
470p
38 3742
NP
C6
40
FOCUS IN
REF
SRS OUT
IN
VCC
41 39
2.2µ
+
-
MITSUBISHI
ELECTRIC
C7
C1
470p
)
(
0.018µ
2.2µ
IN
10µ
Cref
61
5
43
2
(6/12)
Regarding to the other Application Circuit
R16(R13),R17(R14),R18(R15)
The resisters of R16(R13),R17(R14),R18(R15) can be set the
FOCUS position(LF Elevation).
*This figure shows only the side channel.
C10
8
0.22µ
R16
9
R17
10
R18
35
FOCUS position "H"
FOCUS position "L"
1. The setting of the FOCUS position "H"
R17 + R18
R16 +R17 + R18
2. The setting of the FOCUS position "L"
R18
R16 +R17 + R18
*please keep the following formula.
R16+R17+R18 = 1KΩ
.
.
(Example)
In the case of R16 = 390Ω,R17 = 200Ω,R18 = 390Ω
FOCUS position "H"= 60%
FOCUS position "L"= 40%
(SwithSetting)
FOCUS Position "H"
(LF Elevation)
FOCUS Position "L"
(LF Elevation)
.
.
.
.
FOCUS ON/OFF
Switch(22Pin)
H
H
MITSUBISHI
ELECTRIC
FOCUS Position H/L
Switch(20Pin)
H
L
(7/12)
R20(R23),R21(R24)
The resisters of R20(R23),R21(R24)can be set the HF Elevation.
C12
13
0.0039µ
*This figure shows only the side channel.
14
R20
15
R21
35
1. The setting of the HF Elevation.
R21
R20 +R21
*please keep the following formula.
R20+R21 = 10KΩ
.
.
(Example)
HF Elevation
In the case of R20 = 3KΩ,R21 = 7KΩ
HF Elevation = 70%
.
.
MITSUBISHI
ELECTRIC
(8/12)
R25,R26,R27
The resisters of R25,R26,R27 can be set the Bass Compensation.
27
R25
26
R26
25
R27
35
Bass Compensation "H"
Bass Compensation "L"
1. The setting of the Bass Compensation "H"
R26 + R27
R25 +R26 + R27
2. The setting of the Bass Compensation "L"
R27
R25 +R26 + R27
*please keep the following formula.
R25+R26+R27 = 1KΩ
.
.
(Example)
In the case of R25 = 200Ω,R26 = 390Ω,R27 = 390Ω
Bass Compensation "H"= 80%
Bass Compensation "L"= 40%
(SwithSetting)
Bass Compensation
"H"
Bass Compensation
"L"
FOCUS ON/OFF
Switch(22Pin)
H
H
MITSUBISHI
ELECTRIC
.
.
.
.
Bass Comp. H/L
Switch(21Pin)
H
L
(9/12)
Between Pin16(31) and Pin17(30)
Add 10K of resistors between Pin16(31) and Pin17(30), can adjust the
difference between the sound level of Focus ON and the sound level of
Focus OFF.
Also add 10K of resistors between Pin16(31) and Pin17(30),can decrease
the Focus gain.
Then the maximum input voltage and the output noise voltage can be
improved.
(Reference)
In the case of
VOL.1,2=1KΩ,VOL.3,4=10KΩ,VOL.5=1KΩ
Add 10KΩ of resistors between Pin16(31) and Pin17(30)
Parameter Conditions
Maximum
Output Voltage
Maximum
Input Voltage
Pass Gain
Symbol
VOMt
VIM1
VIM2
VIM3
Gvt
Gv1
Gv2
Gv3
Input; pin2,41
Output; pin18, 24
RL =10KΩ,THD=1%
Input; pin2,41 /Output; pin18, 24
SRS ON,FOCUS OFF
THD=1%
Input; pin2,41 /Output; pin18, 24
SRS ON
FOCUS ON(All VOL.=max)
THD=1%
Vi=100mVrms
SRS, Focus OFF
Input; pin2,41 /Output; pin18, 24
Vi=100mVrms
Input; pin2,41 /Output; pin18, 24
SRS ON,FOCUS OFF
Vi=100mVrms
SRS ON
FOCUS ON(All VOL.=max)
(2pin,41pin)-(18, 24Pin)
f=150Hz
f=1KHz
f=20KHz
f=150Hz
f=1KHz
f=20KHz
Typ.
1.9
0.6
0.55
0.2
0
10
12
22
Unit
Vrms
Vrms
dB
Output Noise
Voltage
Channel
Separation
Vno1
Vno2
Vno3
CT
Rg=0(2,41pin)
SRS OFF ,FOCUS OFF
DIN-AUDIO filter
Rg=0(2,41pin)
SRS ON ,FOCUS OFF
DIN-AUDIO filter
Rg=0(2,41pin),
SRS ON, FOCUS ON(All VOL.=max)
DIN-AUDIO filter
Input Side:f=1KHz,Vi=0.5Vrms
Monitor Side:Rg=0, IHF-A filter
Focus:OFF, SRS:OFF
RL=10KΩ
MITSUBISHI
ELECTRIC
5.5
18
50
-90
µVrms
dB
(10/12)
System Circuit Example
(The following figures show only the side channel.)
1. In the case of SRS 3D stereo is effective for the front speakers.
M62419FP/M62440FP
Front Fader
M62437FP
TONE SRS FOCUS
Master
Volume
Rear Fader
Rear
2. In the case of SRS 3D stereo is effective for the front and rear speakers.
(FOCUS is effective for the front speakers.)
M62437FP
Front
M62419FP/M62440FP
TONE
Master
Volume
SRS
Front Fader
Rear Fader
MITSUBISHI
ELECTRIC
FOCUS
Front
Rear
(11/12)
NOTE
Each switches (SRS ON/OFF, FOCUS ON/OFF and FOCUS
Position H/L Switches) does not have the countermeasure
for click noise, so that we recommend outside mute circuit.
SRS,the SRS logo,Sound Retrieval System and "everything else
is only stereo" are registered trademarks of SRS Labs, Inc.
This device available only to licensees of SRS Lab,Inc.
Licensing and application information may be obtained from
SRS Lab, Inc.
Mitsubishi Electric Corporation assumes no responsibility for any
damage,or infringement of any third-party's rights, originating in
the use of any product data, diagrams, charts or circuit application
examples contained in these materials.
MITSUBISHI
ELECTRIC
(12/12)
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