TECHNICAL DATA 2W+2W AMPLIFIER WITH DC VOLUME CONTROL KL7496L DESCRIPTION The KL7496L is a stereo 2W+2W class AB power amplifier, specially designed for high quality sound, TV and Monitor applications. Features of the KL7496L include linear volume control, Stand-by and mute functions. • 2W+2W OUTPUT POWER RL = 8Ω @THD = 10% Vcc = 14V • • • • • • • • • • • • ST-BY AND MUTE FUNCTIONS) LOW TURN-ON TURN-OFF POP NOISE LINEAR VOLUME CONTROL DC COUPLED WITH POWER OP. AMP. NO BOUCHEROT CELL NO ST-BY RC INPUT NETWORK SINGLE SUPPLY RANGING UP TO 15V SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION INTERNALLY FIXED GAIN SOFT CLIPPING VARIABLE OUTPUT AFTER VOLUME CONTROL CIRCUIT POWERDIP (14+3+3) PACKAGE ORDERING INFORMATION KL7496L N Plastic TA = 0° to 70° C BLOCK DIAGRAM Rev. 01 KL7496L Absolute Maximum Ratings Symbol Parameter Vs Value Unit 26 8 V Vpp VIN DC Supply Voltage Maximum Input Voltage Tamb Ambient Operating Temperature 0 to 70 ºC Tstg, Tj Storage and Junction Temperature -40 to 150 ºC V6 Volume CTRL DC voltage 7 V Rth with "on board" Square Heatsink vs. copper area. PIN CONNECTION GND 1 20 GND GND 2 19 GND GND 3 18 GND INL 4 17 OUTL VAROUT_L 5 16 Vs VOLUME 6 15 Vs VAROUT_R 7 14 OUTR NC 8 13 GND INR 9 12 MUTE SVR 10 11 STBY THERMAL DATA Symbol Parameter Thermal Resistance Junction-pins Rth j-pins Rth j-amb Thermal Resistance Junction-ambient (*) (*) Mounted on PCB with no heatsink max. Value 15 Unit °C/W max. 50 °C/W ELECTRICAL CHARACTERISTICS (Refer to the test circuit Vs = 14V, RL = 80Ω,Rg = 50 Ω, Tam = 25ºC) Symbol Parameter Vs Iq DC/Vos Supply Voltage Range Total Quiescent Current Output DC Offset Referred to SVR Potenial Quiescent Output Voltage Output Power Vo Po THD Ipeak Vin Gv GvLine AMin VOL BW Total Harmonic Distortion Output Peak Current Input Signal Closed Loop Gain Monitor Out Gain Attenuation at Minimum Volume Test Condition Min Typ 10 25 200 No Input Signal THD = 10%, RL = 8Ω THD = 1%, RL = 8Ω Gv = 30dB, Po = 1W, f = 1KHz (internally limited) 1.6 7 2 1.3 0.7 0.9 Vol Ctrl > 4.5V Vol Ctrl > 4.5V, Zload > 30KΩ Vol Ctrl < 0.5V 28.5 -1.5 80 30 0 Max Unit 18 50 V mA mV 0.4 0.6 2.8 31.5 1.5 V W W % A Vrms dB dB dB MHz Rev. 01 KL7496L ELECTRICAL CHARACTERISTICS (continued) Symbol eN Parameter Test Condition Min f = 20Hz to 22KHz Play, max volume f = 20Hz to 22KHz Play, max attenuation f = 20Hz to 22KHz Mute Total Output Noise Typ Max Unit 500 800 µV 100 250 µV 60 150 µV SR Slew Rate 5 8 V/µs Ri Input Resistance 22.5 30 KΩ RVar Out Variable Output Resistance Rload Var Out Variable Output Load SVR Supply Voltage Rejection 30 100 2 f = 1kHz, max volume CSVR = 470µF, VRIP = 1Vrms f = 1kHz, max attenuation CSVR = 470µF, VRIP = 1Vrms Ω KΩ 35 39 dB 55 65 dB TM Thermal Muting 150 ºC Ts Thermal Shut-down 160 ºC MUTE STAND-BY & INPUT SELECTION FUNCTIONS VST ON Stand-by ON Threshold VST OFF Stand-by OFF Threshold VM ON Mute ON Threshold VM OFF Mute OFF Threshold IqST-BY Quiescent Current @ Stand-by Mute Attenuation AMUTE IstbyBIAS ImuteBIAS 3.5 V 1.5 3.5 V 0.6 50 V 1.5 V 1 mA 65 dB 80 µA µA -5 µA Stand-by bias current Stand by on VST-BY = 5V VMUTE = 5V Play or Mute Mute bias current Mute 1 5 µA Play 0.2 2 µA -20 APPICATION SUGGESTIONS The recommended values of the external components are those shown on the application circuit of figure 1A. Different values can be used, the following table can help the designer. COMPONENT SUGGESTION VALUE PURPOSE R1 300K Volume control circuit R2 P1 C1 C2 C3 C4 C5 10K 50K 1000µF 470nF 470nF 470µF 100nF C6 C7 C8 C9 1000µF 1µF 1000µF 100nF Mute time constant Volume control circuit Supply voltage bypass Input DC decoupling Input DC decoupling Ripple rejection Volume control time constant Output DC decoupling Mute time constant Output DC decoupling Supply voltage bypass LARGER THAN SUGGESTION SMALLER THAN SUGGESTION Larger volume regulation time Larger mute on/off time Smaller volume regulation time Smaller mute on/off time Lower low frequency cutoff Lower low frequency cutoff Better SVR Larger volume regulation time Lower low frequency cutoff Larger mute on/off time Lower low frequency cutoff Danger of oscillation Higher low frequency cutoff Higher low frequency cutoff Worse SVR Smaller volume regulation time Higher low frequency cutoff Smaller mute on/off time Higher low frequency cutoff Danger of oscillation Rev. 01 KL7496L Figure 1 A. Application Circuit MUTE STAND-BY TRUTH TABLE MUTE H L H L ST-BY H H L L OPERATING CONDITIO STANDBY STANDBY MUTE PLAY Rev. 01 KL7496L Turn ON/OFF Sequences (for optimizing the POP performances) A) USING MUTE AND STAND-BY FUNCTIONS B) USING ONLY THE MUTE FUNCTION To simplify the application, the stand-by pin can be connected directly to Ground. During the ON/OFF transitions is recommend to respect the following conditions. - At the turn-on, the transition mute-play must be made when the SVR pin is higher than 2.5V - At the turn-off, the KL7496L must be brought to mute from the play condition when the SVR pin is higher than 2.5V Rev. 01 KL7496L Quiescent current vs. Supply Voltage Output DC Voltage vs. Supply Voltage Output DC Offset vs. Supply Voltage Output Power vs. Supply Voltage Distortion vs. Output Power Closed Loop gain vs. Frequency Rev. 01 KL7496L St-By Attenuation vs. Vpin 11 Mute Attenuation vs. Vpin 12 Rev. 01 KL7496L PACKAGE DIMENSION Rev. 01