TDA7496 5W+5W AMPLIFIER WITH DC VOLUME CONTROL

Transcription

1 WW AMPLIFIER WITH DC CONTROL W OUTPUT POWER R L = = 0% V CC = 22V STBY AND MUTE FUNCTIONS LOW TURNON TURNOFF POP NOISE LINEAR CONTROL DC COUPLED WITH POWER OP. AMP. NO BOUCHEROT CELL NO ST_BY RC INPUT NETWORK SINGLE SUPPLY RANGING UP TO 3V SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION INTERNALLY FIXED GAIN SOFT CLIPPING VARIABLE OUTPUT AFTER CONTROL CIRCUIT MULTIWATT PACKAGE MULTIPOWER BI0II TECHNOLOGY Multiwatt ORDERING NUMBER: TDA7496 DESCRIPTION The TDA7496 is a stereo W class AB power amplifier assembled i Multiwatt package, specially designed for high quality sound, TV applications. Features of the TDA7496 include linear volume control Standby and Mute functions. The TDA7496 is pin to pin compatible with TDA7496S, TDA7496SA, TDA749, TDA749SA, TDA7494S, TDA7494SA. BLOCK DIAGRAM VAROUT_R 2 3 INR 4 000µF 470nF OUTR OP AMP INL S_GND 8 MUTE/STBY PROTECTIONS 60K STBY MUTE OUTL 0K µf S STBY V S_GND V S2 MUTE 470nF OP AMP 000µF SVR 7 470µF 3 4 VAROUT_L V 00nF 300K D96AU440D September 2003 /

2 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit DC Supply Voltage 3 V V IN Maximum Input Voltage 8 Vpp P tot Total Power Dissipation (T amb = 80 C) W T amb Ambient Operating Temperature () 0 to 70 C T stg,t J Storage and Junction Temperature 40 to 0 C V 3 Volume Control DC Voltage 7 V PIN CONNECTION (top view) OUTR OUTL MUTE STBY S_GND SVR N.C. INL VAROUT_L VAROUT_R INR D96AU44B THERMAL DATA Symbol Parameter Value Unit R th jcase Thermal Resistance junctioncase Typ. = 4; Max. = 4.6 C/W R th jamb Thermal Resistance junctionambient Max. 3 C/W ELECTRICAL CHARACTERISTCS (Refer to the test circuit V s = 22V; R L = 8Ω, R g = 0Ω, T amb = 2 C) Symbol Parameter Test Condition Min. Typ. Max. Unit V s Supply Voltage Range 0 32 V I q Total Quiescent Current 2 0 ma DCV os Output DC Offset Referred to SVR Potential No Input Signal 200 mv V O Quiescent Output Voltage V P O Output Power THD = 0%; R L = 8Ω; THD = %; R L = 8Ω; THD = 0%; R L = 4Ω; = 2V THD = %; R L = 4Ω; = 2V W W THD Total Harmonic Distortion G v = 30dB; P O = W; f = KHz 0.4 % 2/

3 ELECTRICAL CHARACTERISTCS (continued) (Refer to the test circuit V s = 22V; R L = 8Ω, R g = 0Ω, T amb = 2 C) Symbol Parameter Test Condition Min. Typ. Max. Unit I peak Output Peak Current (internally limited).0.3 A V IN Input Signal 2.8 Vrms G V Closed Loop Gain V Ol Ctrl >4.V db G VLine Monitor Out Gain V Ol Ctrl >4.V; Zload >Ω. 0. db A Min V OL Attenuation at Minimum Volume V Ol Ctrl <0.V 80 db BW 0.6 MHz e N Total Output Noise f = 20Hz to 22KHz PLAY, max volume f = 20Hz to 22KHz PLAY, max attenuation µv µv f = 20Hz to 22KHz MUTE 60 0 µv SR Slew Rate 8 V/µs R i Input Resistance KΩ R Var Out Variable Output Resistance Ω R L Var Out Variable Output Load 2 KΩ SVR Supply Voltage Rejection f = KHz; max volume C SVR = 470µF; V RIP = Vrms f = KHz; max attenuation C SVR = 470µF; V RIP = Vrms 3 39 db 6 db T M Thermal Muting 0 C T S Thermal Shutdown 60 C MUTE & INPUT SELECTION FUNCTIONS TON Standby ON Threshold 3. V TOFF Standby OFF Threshold. V V MUTEON Mute ON threshold 3. V V MUTEOFF Mute OFF threshold. V A MUTE Mute Attenuation 0 6 db I qstby Quiescent Standby 0.6 ma I stbybias Standby bias current Stand by ON: TBY = V; V mute = V 80 µa Play or Mute 20 µa I mutebias Mute Bias Current Mute µa Play µa 3/

4 APPLICATION SUGGESTIONS The recommended values of the external components are those shown on the application circuit of figure. Different values can be used, the following table can help the designer. COMPONENT SUGGESTION VALUE PURPOSE LARGER THAN SUGGESTION SMALLER THAN SUGGESTION R 300K Volume Control Circuit Larger volume regulation time Smaller volume regulation time R2 0K Mute time constant Larger mute on/off time Smaller mute on/off time P 0K Volume Control Circuit C 000µF Supply voltage bypass Danger of oscillation C2 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff C3 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff C4 470µF Ripple rejection Better SVR Worse SVR C 00nF Volume control time constant Larger volume regulation time Smaller volume regulation time C6 000µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff C7 µf Mute time constant Larger mute on/off time Smaller mute on/off time C8 000µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff C9 00nF Supply voltage bypass Danger of oscillation Figure. Application Circui C 000µF VAROUT_R C9 0.µF 2 3 INR C2 470nF 4 C8 000µF OUTR OP AMP INL S_GND C3 470nF 8 MUTE/STBY PROTECTIONS OP AMP C7 µf C6 000µF R2 0K OUTL S STBY S2 MUTE V S_GND V SVR 7 C4 470µF 3 4 C 00nF VAROUT_L R 300K TP VOL P 0K LOG V D96AU493D 4/

5 MUTE STANDBY TRUTH TABLE MUTE StBY OPERATING CONDITION H H STANDBY L H STANDBY H L MUTE L L PLAY Turn ON/OFF Sequences (for optimizing the POP performances) Figure. USING ONLY THE MUTE FUNCTION (V) STBY pin#9 (V) VSVR pin#7(v) 2.V MUTE pin#0 (V) INPUT (mv) VOUT (V) IQ (ma) OFF STBY MUTE PLAY MUTE STBY OFF D97AU684 USING ONLY THE MUTE FUNCTION To semplify the application, the standby pin can be connected directly to Ground. During the ON/OFF transitions is recommended to respect the following conditions: At the turnon the transition mute to mute play must be made when the SVR pin is higher than 2.V At the turnoff the TDA7496 must be brought to mute from the play condition when the SVR pin is higher than 2.V. /

6 Figure 2. P.C.B. and Component layoutpcb and Component Layout Figure 3. 6/

7 Figure 4. Quiescent Current vs. Supply Voltage Figure 7. Output DC Offset vs. Supply Voltage Iq (ma) Vi=0 D03AU Supply Voltage (V) VodcVsvr D03AU496 (V) 280 Vi= Supply Voltage (V) Figure. Output Dc Offset vs. Supply Voltage Figure 8. Output Power vs Supply Voltage Vodc D03AU49 (V) 6 Vi= Supply Voltage (V) Output Power (W) Rl=4Ω F=KHz THD=0% THD=% D03AU Supply Voltage (V) Figure 6. Output Power vs. Supply Voltage Figure 9. Distortion vs Output Power Output Power (W) D03AU497 Rl=8Ω 8 F=KHz 7 THD=0% THD=% Supply Voltage (V) Distortion (%) 0. Vs=22V Rl=8Ω F=KHz F=KHz D03AU Output Power (W) 7/

8 Figure 0. Distortion vs Output Power Figure 3. Mute Attenuation vs Vpin 0 Distortion (%) D03AU00 Mute Attenuation (db) D03AU F=KHz F=KHz Vs=2V Rl=4Ω Rl=8Ω Pout=W Output Power (W) Vpin # 0 (V) Figure. Closed Loop Gain vs. Frequency PINS DESCRIPTION Closed loop Gain (db) 30 D03AU0 Figure 4. PIN SVR Rl=8Ω Pout=0.W Cin=470nF Cout=000µF Csvr=470µF Frequency (KHz) SVR 20K 20K 6K 6K K K OUT L OUT R 00µA Figure 2. StBy Attenuation vs Vpin 9 D97AU8A Stby Attenuation (db) Rl=8Ω Pout=W D03AU Vpin # 9 (V) Figure. PINS: INL,INR INn SVR 00µA 6K D97AU89 8/

9 Figure 7. PIN STBY Figure 20. PINS: VAROUTL VAROUTR 0µA STBY 200 VAROUTL 6K D97AU94 D97AU90 Figure 8. PIN: MUTE Figure 2. PIN: MUTE 200 0K 0µA 0µA D97AU92 VOL Figure 9. PINS: OUT R, OUT L D97AU9 Figure 22. PINS: PWGND, SGND OUT GND D97AU93 D97AU88 9/

10 DIM. mm inch MIN. TYP. MAX. MIN. TYP. MAX. A 0.97 B C D E F G G H H L L L L L L M M S S Dia OUTLINE AND MECHANICAL DATA Multiwatt V 0/

11 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners 2003 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 /