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TDA7495SA
11 W + 11 W amplifier with DC volume control
Features
! ! ! ! ! ! ! ! ! ! ! ! !
Multipower BI50II technology
11 W + 11 W output power with RL = 8 , THD = 10%, VCC = 28 V Stand-by and mute functions Low turn-on and turn-off "pop" noise Linear volume control DC coupled to power operational amplifier No boucherot cell No RC input network for stand-by Single supply up to 35 V Short-circuit protection Thermal overload protection Internally fixed gain Soft clipping Variable output after volume control circuit Clipwatt15 package, RoHS
VAROUT_R PW_GND 2 11 1 470nF 30K VOLUME + OP AMP S1 ST-BY S_GND 8 MUTE/STBY PROTECTIONS VOLUME INL 470nF 5 30K + OP AMP SVR 470F VOLUME 7 3 4 VAROUT_L +5V 60K 10 MUTE 9 STBY 10K 1F S2 MUTE 12 OUTL 1000F +5V S_GND VS 13 15 PW_GND
Clipwatt15
Description
The TDA7495SA is a stereo 11 W + 11 W class AB power amplifier specially designed for high-quality sound and TV applications. Its features include linear volume control, stand-by and mute functions. The TDA7495SA is delivered in the Clipwatt15 package
INR
14
1000F OUTR
+5V
100nF
300K
D96AU440D
Table 1.
Device summary
Order code Package Clipwatt15 Tube Packaging
TDA7495SA
December 2007
Rev 2
1/15
www.st.com 15
Pin connections
TDA7495SA
1
Pin connections
Figure 1. Pin connection (top view)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
PW_GND PW_GND OUTR OUTR VS VS OUTL OUTL PW_GND PW_GND MUTE MUTE SDBY STBY S_GND S_GND SVR N.C. INL VAROUT_L N.C. VOLUME N.C.
N.C. VAROUT_R
INR
D02AU1412A
Table 2.
Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Pin description
Name INR VAROUT_R VOLUME VAROUT_L INL N.C. SVR S_GND STBY MUTE PW_GND OUTL VS OUTR PW_GND Input, right channel Volume control output, right channel Adjust volume Volume control output, left channel Input, left channel Not connected Internal half supply bias Signal ground Stand-by (active high) Mute (active high) Power ground Output, left channel Power supply Output, right channel Power ground Description
2/15
TDA7495SA
Electrical specifications
2
Electrical specifications
Table 3.
Symbol VS VIN Ptot Tamb Tstg,TJ V3 DC supply voltage Maximum input voltage Total power dissipation (Tamb = 70 C) Ambient operating temperature Storage and junction temperature Volume control DC voltage
Absolute maximum ratings
Parameter 35 8 15 0 to 70 -40 to 150 7 Value Unit V Vpp W C C V
Table 4.
Symbol
Thermal data
Parameter Min Typ 4.5 48 Max 5.0 Unit C/W C/W
Rth j-case Thermal resistance junction-case Rth j-amb Thermal resistance junction-ambient
Unless otherwise stated, the test conditions for the specifications given in Table 5 below are: VS = 20 V, RL = 8 , generator resistance Rg = 50 , Tamb = 25 C. Refer also to the application circuit of Figure 2 on page 5. Table 5.
Symbol Vs Iq DCVos VO
Electrical characteristics
Parameter Supply voltage range Total quiescent current Output DC offset referred to SVR potential Quiescent output voltage THD = 10%, VS = 28 V THD = 1%, VS = 28 V 9.5 7.5 No input signal -650 10 11 8 8 6 3.8 2.9 0.4 1.7 2.4 2.8 22.5 30 30 100 Test condition Min 11 70 Typ Max 35 100 650 Unit V mA mV V W W W % A V RMS k
PO
Output power
THD = 10%, VS = 20 V, RL = 4 7 THD = 1%, VS = 20 V, RL = 4 5 THD = 10%, VS = 18 V THD = 1%, VS = 18 V 3.5 2.2
THD Ipeak VIN Ri RVarOut
Total harmonic distortion Peak output current Input signal Input resistance Output resistance at pins VAROUT_L, VAROUT_R
Gv = 30 dB, PO = 1 W, f = 1 kHz (internally limited)
3/15
Electrical specifications Table 5.
Symbol
TDA7495SA
Electrical characteristics (continued)
Parameter Test condition 2 VOLUME >4.5 V VOLUME > 4.5 V, RL_VarOut > 30 k VOLUME < 0.5 V 28.5 -1.5 80 0.6 f = 20 Hz to 22 kHz PLAY, max volume 500 100 60 5 f = 1 kHz; max volume 35 CSVR = 470 F; VRIP = 1 V RMS f = 1 kHz; max attenuation 55 CSVR = 470 F; VRIP = 1 V RMS 8 39 65 150 160 800 250 150 30 0 31.5 1.5 Min Typ Max Unit k dB dB dB MHz V V V V/s dB dB C C
Load resistance which can RL_VarOut be connected to pins VAROUT_L, VAROUT_R Gv Gvline AMin_VOL BW Closed-loop gain Volume control output at max gain Attenuation at minimum volume setting
eN
Total output noise
f = 20 Hz to 22 kHz PLAY, max attenuation f = 20 Hz to 22 kHz MUTE
SR
Slew rate
SVR
Supply voltage rejection
TM TS
Thermal muting Thermal shut-down
Mute, stand-by and input selection functions VSTBY VMUTE IqSTBY AMUTE Stand-by threshold Mute threshold Quiescent current in stand-by Mute attenuation In stand-by mode, VSTBY = 5 V, VMUTE = 5 V In play or mute mode In mute mode IMUTEbias Bias current for pin MUTE In play mode -20 50 2.3 2.3 2.5 2.5 0.6 65 80 -5 1 0.2 5 2 2.7 2.7 1 V V mA dB A A A A
ISTBYbias Bias current for pin STBY
4/15
TDA7495SA
Applications
3
3.1
Applications
Circuit diagram and components
Figure 2. Application circuit
+VS C1 1000F VAROUT_R PW_GND 2 11 1 C2 470nF 30K VOLUME + OP AMP S1 STBY S_GND 8 MUTE/STBY PROTECTIONS VOLUME INL C3 470nF 5 30K + OP AMP SVR C4 470F VOLUME 7 3 4 VAROUT_L R1 300K TP1 VOL P1 50K LOG +5V 12 C6 1000F 9 10 C7 1F OUTL PW_GND R2 10K +5V 13 15 VS PW_GND C9 0.1F
INR
14
C8 1000F
PW_GND OUTR
S_GND +5V
S2 MUTE
STBY L L
D96AU493D
MUTE L H L H
Mode Play Mute Standby Standby
C5 100nF
H H
The recommended values of the external components are those shown on the application circuit of Figure 2. Table 6 below indicates how the performance changes when component values different to the recommended are used. Table 6.
Symbol R1 R2 P1 C1 C2, C3 C4 C5 C6, C8 C7 C9
Application suggestions
Suggested value 300 k 10 k 50 k 1000 F 470 nF 470 F 100 nF 1000 F 1 F 100 nF Purpose Volume control circuit Mute time constant Volume control Supply voltage decoupling Input AC coupling Ripple rejection Volume control time constant Output AC coupling Mute time constant Supply voltage decoupling Lower low-frequency cutoff Better SVR Danger of oscillation Higher low-frequency cutoff Worse SVR Larger than suggestion Smaller than suggestion
Larger volume regulation Smaller volume time regulation time Larger mute on/off time Smaller mute on/off time
Larger volume regulation Smaller volume time regulation time Lower low-frequency cutoff Larger mute on/off time Higher low-frequency cutoff Smaller mute on/off time Danger of oscillation
5/15
Applications
TDA7495SA
3.2
Board layout
Figure 3. PCB and component layout
Figure 4.
Evaluation board bottom layer layout
Figure 5.
Evaluation board top layer layout
6/15
TDA7495SA
Applications
3.3
Power-up/down sequence
In order to reduce the loud speaker "pop" noise when switching the device on or off we recommend that you follow the sequence of operations shown in Figure 6 below. Figure 6. Recommended sequence using mute and stand-by functions
VS (V) 28
ST-BY pin#9 (V) 5
VSVR pin#7(V)
2.5V MUTE pin#10 (V) 5
INPUT (mV)
VOUT (V)
OFF
STBY MUTE
PLAY
MUTE STBY
OFF
IQ (mA)
D96AU531A
Using the mute function only
To simplify the application, pin STBY can be connected directly to ground so that the device is always active. Then, to maintain the power-up/down performance you should adhere to the following conditions:
" "
At turn-on the transition mute to play must be made when pin SVR is higher than 2.5 V. At turn-off the TDA7495SA must be set to mute from the play condition before pin SVR falls below 2.5 V.
7/15
Applications
TDA7495SA
3.4
Typical electrical characteristics
Unless otherwise stated, the test conditions for the electrical characteristics given in the figures below are: VS = 20 V, RL = 8 , f = 1 kHz, generator resistance Rg = 50 , Tamb = 25 C. Refer also to the application circuit of Figure 2 on page 5.
Figure 7.
Output power vs supply voltage
POUT (W) 16 14 RL=8 12 10 8 6 4 2 0 11 15 19 23 27 31 VS(V) d=1% d=10%
D97AU559
Figure 8.
d (%)
Distortion vs output power
D97AU562
VS=20V RL=4
1
f=15KHz
f=1KHz
0.1
0.01 0 2 4 6 POUT(W)
Figure 9.
Distortion vs output power
d (%)
D97AU560
Figure 10. Stand-by attenuation vs Vpin#9
ATT (dB) 0
0dB=1W
D97AU565
VS=28V RL=8
-20 -40 -60
1
f=15KHz
0.1
f=1KHz
-80 -100
0.01 0 2 4 6 8 POUT(W)
-120 0 1 2 3 4 Vpin#9(V)
Figure 11. Output power vs supply voltage
POUT (W) 14 12
RL=4
D97AU561
Figure 12. Mute attenuation vs Vpin#10
ATT (dB) 0 -20 -40
0dB=1W
D97AU566
10 8
d=10%
6
d=1%
-60 -80 -100
4 2 0 10 12 14 16 18 20 22 24 VS(V)
0
1
2
3
4 Vpin#10(V)
8/15
TDA7495SA
Applications
Figure 13. Supply voltage vs frequency
SVR (dB) VRIP=1VRMS -20
D97AU564
Figure 14. Gain vs volume control voltage (#3)
Gain (dB) 30 20 10 0 POUT=1W
D97AU563
-40
MAX VOLUME
-10 -20 -30 -40
-60 MAX ATTENUATION -80
-50 -60 -70 -80
-100 20 100 1K f(Hz)
0.0
1.0
2.0
3.0
4.0 Vpin#3(V)
Figure 15. Power dissipation vs output power Figure 16. Power dissipation vs output power
PDISS (W) 10 8 6 4 2 0 0.1 1 10 POUT(W)
RL=2 x 8 f=1KHz VS=28V
D97AU567
PDISS (W) 16
RL=2 x 4 f=1KHz
D97AU568
VS=26V
12
VS=24V VS=20V
8
VS=18V VS=14V
4
0 0.1 1 10 POUT(W)
3.5
Internal equivalent circuits
Figure 18. Pins: INL, INR
VS VS
Figure 17. Pin: SVR
VS
VS
+ 30K OUT L
20K SVR 20K
6K
1K
6K INn
500A
6K
1K 30K
30K
OUT R + 100A D97AU585A
D97AU589
SVR
9/15
Applications
TDA7495SA
Figure 19. Pins: PW-GND, S-GND
Figure 20. Pin: STBY
VS
10A
VS GND
D97AU593
STBY
200
65K
D97AU594
Figure 21. Pin: MUTE
Figure 22. Pins: OUTR, OUTL
VS VS
MUTE
200
10K
OUT
50A
D97AU592 D97AU588
Figure 23. Pins: VAROUT_L, VAROUT_R
Figure 24. Pin: VOLUME
VS 10A VAROUT-L VOL
VS
D97AU590 D97AU591
10/15
TDA7495SA
Thermal considerations
4
Thermal considerations
In order to avoid the intervention of the thermal protection, it is important to choose an adequate heatsink. The parameters that influence the heatsink size are:
" " "
maximum dissipated power for the device (Pdmax) maximum thermal resistance junction to case (RTh j-c) maximum ambient temperature Tamb_max
Example: For VCC = 20 V, RL = 8 , RTh j-c = 5 C/W, Tamb_max = 50 C 2 V cc Pdmax = Number_of_channels * ----------------------2 2 R L For the heatsink, =5W
150 - T amb_max R Th j-c = --------------------------------------- - R Th j-c = 100 - 5 = 15C/W --------P d max 5
Figure 25 shows the power derating curve for the device. Figure 25. Power derating curve
20
15 (d) Pd (W) 10 (b) 5 (c) (a) a) b) c) d) Infinite Heatsink 7 C/ W 10 C/ W 3.3 C/ W
0 0 40 80 Tamb (C) 120 160
11/15
Clipwatt mounting suggestions
TDA7495SA
5
Clipwatt mounting suggestions
The suggested method for securing the Clipwatt package on an external heat sink is by a spring clip placed as close as possible to the center of the plastic body, as indicated in the example of Figure 26. Thermal grease can be used to further reduce the thermal resistance of the contact between package and heatsink. The clip should apply a force of 7 - 10 kg to provide sufficient pressure for a good contact. Care must be taken to ensure that the contact pressure on the package does not exceed 15 kg/mm. As an example, if the clip applies a 15-kg force on the package then the clip must have a contact area of at least 1 mm. Figure 26. Example of correctly placed clip
12/15
TDA7495SA
Package information
6
Package information
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
mm DIM. MIN. A B C D E F G G1 H1 H2 H3 L L1 L2 L3 M M1 10.7 19.85 17.9 14.55 11 5.5 2.54 2.54 11.2 0.421 0.49 0.67 1.14 17.57 1.27 17.78 12 18.6 0.781 0.704 0.572 0.433 0.217 0.100 0.100 0.441 0.15 1.50 0.55 0.73 1.4 17.91 0.019 0.026 0.045 0.692 0.050 0.700 0.480 0.732 TYP. MAX. 3.2 1.05 0.006 0.061 0.022 0.029 0.055 0.705 MIN. TYP. MAX. 0.126 0.041 Weight: 1.92gr inch
OUTLINE AND Outline and mechanical data MECHANICAL DATA
Clipwatt15
0044538 G
13/15
Revision history
TDA7495SA
7
Revision history
Table 7.Document revision history
Date Sep 2003 11-Dec 2007 Revision 1 2 Initial release Updated package and PCB information Description
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TDA7495SA
Revision history
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