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MITSUBISHI ELECTRIC
M62437FP
SOUND CONTROLLER WITH SRS FOCUS & SRS SURROUND
SRS F (
DESCRIPTION
) cus,
SRS 3D Stereo Sound Controller
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
42P2R
Supply voltage range****Vcc=7 ~ 9V Rated supply voltage****Vcc=8V SYSTEM BLOCK DIAGRAM
Rear L
Tone
Rear R
Tone
M62419FP
Lin
Front L
Rin
F(
)CUS
Front R
M62437FP
Interface
SRS FOCUS ON/OFF ON/OFF
LF Ele.
HF Ele. Bass Comp.
MITSUBISHI ELECTRIC
(1/12)
Block Diagram & Application Example
OUT FOCUS 2.2 1K ON/OFF SRS ON/OFF 3K VOL.5 2.4K 390p R39 C17 C6 C9 0.1 0.01 NC 27 25 26 24 23 22 28 33 32 31 30 29 10K VOL.4
VCC 1K VOL.2 NC C13 35 34 37 36 0.0039
IN
2.2
470p
2.2 0.22
C6
NP
C9
42
41
40
39
38
SRS OUT
Vref
I/F
FOCUS IN
+
1 10 VOL.1 1K C2 0.01 NC C7 470p 2.2 0.22
NP
2 6 C10 7 8 9
SRS OUT FOCUS IN
Cref
10
2.2
MITSUBISHI ELECTRIC
11 12 13 C12 0.0039 10K 14 VOL.3 C3 0.82
-
REF
3
4
5
15
16
17
18
19
20
21
C1
(
)
0.018
BASS Comp. Position H/L
FOCUS Position H/L
R41 C16 2.4K 390p 3K
2.2
(2/12)
IN
Vcc OUT
Vcc
ABSOLUTE MAXIMUM RATINGS
Symbol Vcc,Vdd Pd K Topr Tstg
Parameter Supply Voltage Power Dissipation Thermal Derating Operating Temperature Storage Temperature
Conditions
Ratings 12
Unit V mW mW/C C C
Ta25 Ta>25
990
9.9
-20 ~ +75 -55 ~ + 125
Thermal Derating
1200
Power Dissipation Pd [ mW ]
1000
990
800
600
495
400
200
25
50
75
100
125
150
AMBIENT TEMPERATURE Ta [ C ]
MITSUBISHI ELECTRIC
(3/12)
EAEiEcEOaOoHido ELECTRICAL CHARACTERISTICS AIdd
(1) Power Supply Characteristics
Parameter Circuit Current Symbol
Icc
(Ta=25C,Vcc=8.0V, f=1kHz) Conditions
Min 42pin Icc No Signal
Limit
typ 25 Max 45
Unit
mA
(2) Input / Output Characteristics
Ta=25C,Vcc=8.0V, f=1kHz VOL.1,2=1K(VOL),VOL.3,4=10K(VOL) VOL.5=1K(VOL)
Parameter
Maximum Output Voltage
Symbol
VOMt
Conditions
Input; pin2,41 Output; pin18, 24
Limit
Min 1.6 typ 1.9 Max
Unit
RL =10K,THD=1%
Input; pin2,41 /Output; pin18, 24 f=150Hz SRS ON,FOCUS OFF THD=1% Input; pin2,41 /Output; pin18, 24 f=1KHz SRS ON FOCUS ON(All VOL.=max) THD=1% f=20KHz Vi=100mVrms SRS, Focus OFF Input; pin2,41 /Output; pin18, 24 Vi=100mVrms Input; pin2,41 /Output; pin18, 24 f=150Hz SRS ON,FOCUS OFF Vi=100mVrms SRS ON FOCUS ON(All VOL.=max) (2pin,41pin)-(18, 24Pin) Rg=0(2,41pin) SRS OFF ,FOCUS DIN-AUDIO filter Rg=0(2,41pin) SRS ON ,FOCUS DIN-AUDIO filter Rg=0(2,41pin), SRS ON, FOCUS DIN-AUDIO filter f=1KHz
2.0 13
Vrms
VIM1 Maximum Input Voltage
0.4
0.6
VIM2
0.2
0.3
Vrms
VIM3
0.06 0.11
Gvt
-2.0 7 15 25
0 10 18 28
Gv1 Pass Gain Gv2 Gv3
dB 21 31
f=20KHz
Vno1 Output Noise Voltage
OFF
-
5.5
15
Vno2 Vno3
OFF
18
50
Vrms
ON(All VOL.=nax)
90
150
Channel Separation
CT
Input Side:f=1KHz,Vi=0.5Vrms Monitor Side:Rg=0, IHF-A filter Focus:OFF, SRS:OFF RL=10K
-90
-75
dB
MITSUBISHI ELECTRIC
(4/12)
(3) DC Control Characteristic of the Switch Block
Symbol Parameter "H" Level Input Voltage "L" Level Input Voltage Condition Pin 22,23 Pin 22,23
Min 2.1 0 Limit typ Max
~ ~
Unit
V V
VIH V IL
Vcc 0.8
Switch Condition and the Mode
23 SRS 3D Stereo
SRS ON/OFF Switch
22 FOCUS
FOCUS ON/OFF Switch
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)
[For Exsample]The other Application Circuit
OUT 3K 2.4K 390p 400 R24 7K R27 200 390 R15 C13 35 34 33 32 31 25 30 29 27 26 28 36 R23 R25 R26 24 23 22 0.1 0.01 0.0039 3K 200 400 R39 C17 C6 C9 2.2 SRS ON/OFF FOCUS ON/OFF
VCC
IN
2.2
470p
2.2 0.22 390
C6 37
NP
C9 R13 R14
42
41
40
39
38
SRS OUT
Vref BA BB
BC
I/F
FOCUS IN
+
SRS OUT FOCUS IN
8 10
NP
Cref
10
2.2
7K
390
C2 0.01 C3
R18
R21
(6/12)
3K
MITSUBISHI ELECTRIC
6 C7 470p 2.2 0.22 390 C10 R16 R17 200 7 9 11 12 13 C12 0.0039 14 0.82
-
REF
1
2
3
4
5
15 R20 3K
16
17
18
19
20
21
C1
(
)
0.018
R41 C16 2.4K 390p
2.2
FOCUS Position H/L BASS Comp. Position H/L OUT
IN
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). C10
8 *This figure shows only the side channel.
0.22
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 = 1K . (Example) In the case of R16 = 390,R17 = 200,R18 = 390
.
FOCUS position "H"= 60% . . FOCUS position "L"= 40% . (SwithSetting)
FOCUS ON/OFF Switch(22Pin) FOCUS Position "H" (LF Elevation) FOCUS Position "L" (LF Elevation) FOCUS Position H/L Switch(20Pin)
H H
MITSUBISHI ELECTRIC
H L (7/12)
R20(R23),R21(R24) The resisters of R20(R23),R21(R24)can be set the HF Elevation.
*This figure shows only the side channel.
C12
13
0.0039
14 R20 15 R21 35
HF Elevation
1. The setting of the HF Elevation. R21 R20 +R21
*please keep the following formula. . R20+R21 = 10K .
(Example) In the case of R20 = 3K,R21 = 7K 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 = 1K . (Example) In the case of R25 = 200,R26 = 390,R27 = 390 Bass Compensation "H"= 80% . . Bass Compensation "L"= 40% . (SwithSetting)
FOCUS ON/OFF Switch(22Pin) Bass Compensation "H" Bass Compensation "L" Bass Comp. H/L Switch(21Pin) .
H H
MITSUBISHI ELECTRIC
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
Parameter
Maximum Output Voltage
VOL.1,2=1K,VOL.3,4=10K,VOL.5=1K Add 10K of resistors between Pin16(31) and Pin17(30)
Symbol
VOMt
Conditions
Input; pin2,41 Output; pin18, 24
Typ.
1.9
Unit
Vrms
RL =10K,THD=1%
Input; pin2,41 /Output; pin18, 24 f=150Hz SRS ON,FOCUS OFF THD=1% f=1KHz Input; pin2,41 /Output; pin18, 24 SRS ON FOCUS ON(All VOL.=max) THD=1% f=20KHz Vi=100mVrms SRS, Focus OFF Input; pin2,41 /Output; pin18, 24 Vi=100mVrms Input; pin2,41 /Output; pin18, 24 f=150Hz SRS ON,FOCUS OFF Vi=100mVrms SRS ON FOCUS ON(All VOL.=max) (2pin,41pin)-(18, 24Pin) Rg=0(2,41pin) SRS OFF ,FOCUS DIN-AUDIO filter Rg=0(2,41pin) SRS ON ,FOCUS DIN-AUDIO filter Rg=0(2,41pin), SRS ON, FOCUS DIN-AUDIO filter f=1KHz
VIM1 Maximum Input Voltage
0.6
VIM2
0.55
Vrms
VIM3
0.2
Gvt Gv1 Pass Gain Gv2 Gv3
0
10 dB 12 22
f=20KHz
Vno1 Output Noise Voltage
OFF
5.5 Vrms
Vno2 Vno3
OFF
18
ON(All VOL.=max)
50
Channel Separation
CT
Input Side:f=1KHz,Vi=0.5Vrms Monitor Side:Rg=0, IHF-A filter Focus:OFF, SRS:OFF RL=10K
-90
dB
MITSUBISHI ELECTRIC
(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 TONE M62437FP
SRS
FOCUS
Front
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
M62419FP/M62440FP Front Fader TONE SRS
FOCUS Front
Master Volume Rear Fader Rear
MITSUBISHI ELECTRIC
(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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