TDA7495SA 11 W + 11 W amplifier with DC volume control Features Multipower BI50II technology ! 11 W + 11 W output power with RL = 8 Ω, 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 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 VAROUT_R PW_GND 11 470nF 13 15 VOLUME 1 INR VS 2 1000µF 14 + 30K PW_GND OUTR OP AMP S1 ST-BY S_GND 9 8 +5V STBY MUTE/STBY PROTECTIONS VOLUME 470nF + 30K 12 - 1µF +5V OUTL 7 470µF 3 VOLUME 100nF Table 1. MUTE 1000µF OP AMP SVR 10 S2 MUTE 5 INL 10K 60K S_GND 4 VAROUT_L +5V 300K D96AU440D Device summary Order code TDA7495SA December 2007 Package Clipwatt15 Packaging Tube Rev 2 1/15 www.st.com 15 Pin connections 1 TDA7495SA Pin connections Figure 1. Pin connection (top view) 15 PW_GND PW_GND 14 OUTR OUTR 13 VS VS 12 OUTL OUTL 11 PW_GND PW_GND 10 MUTE MUTE 9 SDBY STBY 8 S_GND S_GND 7 SVR 6 N.C. 5 INL 4 VAROUT_L N.C. 3 VOLUME N.C. 2 N.C. VAROUT_R 1 INR D02AU1412A Table 2. Pin description Number 2/15 Name Description 1 INR Input, right channel 2 VAROUT_R Volume control output, right channel 3 VOLUME Adjust volume 4 VAROUT_L Volume control output, left channel 5 INL Input, left channel 6 N.C. Not connected 7 SVR Internal half supply bias 8 S_GND Signal ground 9 STBY Stand-by (active high) 10 MUTE Mute (active high) 11 PW_GND Power ground 12 OUTL Output, left channel 13 VS Power supply 14 OUTR Output, right channel 15 PW_GND Power ground TDA7495SA 2 Electrical specifications Electrical specifications Table 3. Absolute maximum ratings Symbol Parameter Value Unit VS DC supply voltage 35 V VIN Maximum input voltage 8 Vpp Ptot Total power dissipation (Tamb = 70° C) 15 W Tamb Ambient operating temperature 0 to 70 °C Tstg,TJ Storage and junction temperature -40 to 150 °C V3 Volume control DC voltage 7 V Table 4. Thermal data Symbol Parameter Min Typ Rth j-case Thermal resistance junction-case 4.5 Rth j-amb 48 Thermal resistance junction-ambient Max Unit 5.0 °C/W °C/W Unless otherwise stated, the test conditions for the specifications given in Table 5 below are: VS = 20 V, RL = 8 Ω, generator resistance Rg = 50 Ω, Tamb = 25° C. Refer also to the application circuit of Figure 2 on page 5. Table 5. Symbol Electrical characteristics Parameter Vs Supply voltage range Iq Total quiescent current DCVos Output DC offset referred to SVR potential VO Quiescent output voltage Test condition Output power Typ 11 70 No input signal THD = 10%, VS = 28 V THD = 1%, VS = 28 V PO Min -650 9.5 7.5 THD = 10%, VS = 20 V, RL = 4 Ω 7 THD = 1%, VS = 20 V, RL = 4 Ω 5 THD = 10%, VS = 18 V THD = 1%, VS = 18 V THD Total harmonic distortion Gv = 30 dB, PO = 1 W, f = 1 kHz Ipeak Peak output current (internally limited) VIN Input signal Ri Input resistance RVarOut Output resistance at pins VAROUT_L, VAROUT_R 3.5 2.2 Max 35 V 100 mA 650 mV 10 V 11 8 W 8 6 W 3.8 2.9 W 0.4 1.7 2.4 30 30 % A 2.8 22.5 Unit V RMS kΩ 100 Ω 3/15 Electrical specifications Table 5. Symbol TDA7495SA Electrical characteristics (continued) Parameter Test condition Load resistance which can RL_VarOut be connected to pins VAROUT_L, VAROUT_R Min Typ Max 2 Unit kΩ Gv Closed-loop gain VOLUME >4.5 V 28.5 30 31.5 dB Gvline Volume control output at max gain VOLUME > 4.5 V, RL_VarOut > 30 kΩ -1.5 0 1.5 dB AMin_VOL Attenuation at minimum volume setting VOLUME < 0.5 V 80 BW eN SR SVR dB 0.6 Total output noise f = 20 Hz to 22 kHz PLAY, max volume 500 800 µV f = 20 Hz to 22 kHz PLAY, max attenuation 100 250 µV f = 20 Hz to 22 kHz MUTE 60 150 µV 8 V/µs f = 1 kHz; max volume 35 CSVR = 470 µF; VRIP = 1 V RMS 39 dB f = 1 kHz; max attenuation 55 CSVR = 470 µF; VRIP = 1 V RMS 65 dB Slew rate Supply voltage rejection MHz 5 TM Thermal muting 150 °C TS Thermal shut-down 160 °C Mute, stand-by and input selection functions VSTBY Stand-by threshold 2.3 2.5 2.7 V VMUTE Mute threshold 2.3 2.5 2.7 V IqSTBY Quiescent current in stand-by 0.6 1 mA AMUTE Mute attenuation ISTBYbias Bias current for pin STBY 50 In stand-by mode, VSTBY = 5 V, VMUTE = 5 V In play or mute mode IMUTEbias Bias current for pin MUTE 4/15 -20 65 dB 80 µA -5 µA In mute mode 1 5 µA In play mode 0.2 2 µA TDA7495SA Applications 3 Applications 3.1 Circuit diagram and components Figure 2. Application circuit +VS C1 1000µF C9 0.1µF VS VAROUT_R PW_GND 2 11 15 1 INR C2 470nF 13 VOLUME 14 + 30K PW_GND C8 1000µF PW_GND OUTR OP AMP S1 STBY S_GND 9 8 MUTE/STBY PROTECTIONS C7 1µF 5 INL C3 470nF + 30K 12 - S2 MUTE PW_GND 7 C4 470µF 3 4 VOLUME C5 100nF VAROUT_L R1 300K TP1 VOL P1 50K LOG +5V OUTL C6 1000µF OP AMP SVR S_GND R2 10K 10 VOLUME +5V +5V D96AU493D STBY MUTE L L Play Mode L H Mute H L Standby H H Standby 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. Application suggestions Symbol Suggested value R1 300 kΩ Volume control circuit Larger volume regulation Smaller volume time regulation time R2 10 kΩ Mute time constant Larger mute on/off time P1 50 kΩ Volume control C1 1000 µF Supply voltage decoupling C2, C3 470 nF Input AC coupling Lower low-frequency cutoff Higher low-frequency cutoff C4 470 µF Ripple rejection Better SVR Worse SVR C5 100 nF Volume control time constant Larger volume regulation Smaller volume time regulation time C6, C8 1000 µF Output AC coupling Lower low-frequency cutoff Higher low-frequency cutoff C7 1 µF Mute time constant Larger mute on/off time Smaller mute on/off time C9 100 nF Supply voltage decoupling Purpose Larger than suggestion Smaller than suggestion Smaller mute on/off time Danger of oscillation Danger of oscillation 5/15 Applications 3.2 6/15 TDA7495SA Board layout Figure 3. PCB and component layout Figure 4. Evaluation board bottom layer layout Figure 5. Evaluation board top layer layout TDA7495SA 3.3 Applications 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 3.4 TDA7495SA Typical electrical characteristics Unless otherwise stated, the test conditions for the electrical characteristics given in the figures below are: VS = 20 V, RL = 8 Ω, f = 1 kHz, generator resistance Rg = 50 Ω, 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 D97AU559 Figure 8. Distortion vs output power D97AU562 d (%) VS=20V RL=4Ω 14 RL=8Ω 12 1 f=15KHz d=10% 10 8 f=1KHz 6 d=1% 0.1 4 2 0 Figure 9. 11 15 19 23 27 31 VS(V) Distortion vs output power D97AU560 d (%) 0.01 0 2 4 6 Figure 10. Stand-by attenuation vs Vpin#9 ATT (dB) D97AU565 0dB=1W 0 VS=28V RL=8Ω POUT(W) -20 1 -40 f=15KHz -60 f=1KHz 0.1 -80 -100 0.01 0 2 4 6 8 POUT(W) Figure 11. Output power vs supply voltage POUT (W) D97AU561 14 -120 0 1 2 3 4 Vpin#9(V) Figure 12. Mute attenuation vs Vpin#10 ATT (dB) D97AU566 0dB=1W 0 12 RL=4Ω -20 10 -40 8 d=10% 6 -60 d=1% 4 -80 2 -100 0 10 8/15 12 14 16 18 20 22 24 VS(V) 0 1 2 3 4 Vpin#10(V) TDA7495SA Applications Figure 13. Supply voltage vs frequency Figure 14. Gain vs volume control voltage (#3) D97AU564 SVR (dB) Gain (dB) 30 VRIP=1VRMS D97AU563 20 -20 10 POUT=1W 0 -40 -10 MAX VOLUME -20 -30 -60 -40 MAX ATTENUATION -50 -80 -60 -70 -80 -100 20 100 1K 0.0 f(Hz) 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) PDISS (W) D97AU567 RL=2 x 8Ω f=1KHz 10 16 D97AU568 RL=2 x 4Ω f=1KHz VS=26V VS=28V 8 12 VS=24V 6 VS=20V 8 VS=18V 4 VS=14V 2 4 0 0 0.1 3.5 1 10 POUT(W) 0.1 1 10 POUT(W) Internal equivalent circuits Figure 17. Pin: SVR Figure 18. Pins: INL, INR VS VS VS VS OUT L + - 20K 6K 1K 20K 6K 1K 30K 6K SVR 500µA INn 30K - 30K OUT R + D97AU589 100µA SVR D97AU585A 9/15 Applications TDA7495SA Figure 19. Pins: PW-GND, S-GND Figure 20. Pin: STBY VS 10µA VS STBY GND 200 D97AU593 65K D97AU594 Figure 21. Pin: MUTE Figure 22. Pins: OUTR, OUTL VS VS MUTE 200 10K OUT 50µA D97AU592 D97AU588 Figure 23. Pins: VAROUT_L, VAROUT_R Figure 24. Pin: VOLUME VS VS 10µA VAROUT-L VOL D97AU590 D97AU591 10/15 TDA7495SA 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 Ω, RTh j-c = 5° C/W, Tamb_max = 50° C 2 V cc Pdmax = Number_of_channels * ----------------------2 2Π ⋅ R L =5W For the heatsink, 150 – T amb_max R Th j-c = --------------------------------------- – R Th j-c = 100 ---------- – 5 = 15°C/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) 4 Thermal considerations (a) a) 10 (b) Infinite Heatsink b) 7 °C/ W c) 10 °C/ W d) 3.3 °C/ W (c) 5 0 0 40 80 120 160 Tamb (°C) 11/15 Clipwatt mounting suggestions 5 TDA7495SA 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/mm². 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 mm². Figure 26. Example of correctly placed clip 12/15 TDA7495SA 6 Package information Package information In order to meet environmental requirements, ST offers these devices in ECOPACK® 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 inch DIM. MIN. TYP. A MAX. MIN. TYP. 3.2 B 0.126 1.05 0.15 0.006 D 1.50 0.061 0.49 0.55 0.019 0.022 F 0.67 0.73 0.026 1.14 1.27 1.4 0.045 0.050 0.055 G1 17.57 17.78 17.91 0.692 0.700 0.705 0.029 H1 12 0.480 H2 18.6 0.732 19.85 L L2 0.781 17.9 L1 0.704 14.55 10.7 MECHANICAL DATA Weight: 1.92gr G H3 OUTLINE AND data Outline and mechanical 0.041 C E MAX. 11 0.572 11.2 0.421 0.433 L3 5.5 0.217 M 2.54 0.100 M1 2.54 0.100 0.441 Clipwatt15 0044538 G 13/15 Revision history 7 TDA7495SA Revision history Table 7.Document revision history 14/15 Date Revision Description Sep 2003 1 Initial release 11-Dec 2007 2 Updated package and PCB information TDA7495SA Revision history Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2007 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 15/15