UTC UNISONIC TECHNOLOGIES CO., LTD. 1 UTC TDA7496L LINEAR INTEGRATED CIRCUIT 2W+2W AMPLIFIER WITH DC VOLUME CONTROL

Transcription

1 2W2W AMPLIFIER WITH DC CONTROL DESCRIPTION The UTC TDA796L is a stereo 2W2W class AB power amplifier, specially designed for high quality sound, TV and Monitor applications. Features of the UTC TDA796L include linear volume control, Standby and mute functions. FEATURES *2W2W output power: RL=8Ω@THD=%,Vcc=1V *STBY and mute functions *Low turnon turnoff pop noise *Linear volume control DC coupled with power op. amp. *No boucherot cell *No STBY RC input network *Single supply ranging up to 1V *Short circuit protection *Thermal overload protection *Internally fixed gain *Soft clipping *Variable output after volume control circuit DIP SOP BLOCK DIAGRAM VAROUT_R INR INL 70μF 70nF 70nF 1,2,3,13 18,19, 6 7 1,16 OP AMP MUTE/STBY PROTECTIONS VAROUT_L OP AMP 60K 00μF 1 OUTR 11 STBY MUTE K 12 1μF 17 OUTL 00μF S1 STBY S2 MUTE S_ 0nF 300K UTC UNISONIC TECHNOLOGIES CO., LTD. 1

2 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATING UNIT DC Supply Voltage 26 V Maximum Input Voltage VIN 8 Vpp Total Power Dissipation (Tcase =60 ) Ptot 6 W Ambient Operating Temperature Ta 0 ~ 70 Junction Temperature Tj 0 ~ 10 Storage Temperature Tstg 0 ~ 10 Volume CTRL DC voltage V6 7 V PIN CONNECTION INL VAROUT_L VAROUT_R N.C. INR OUTL OUTR MUTE STBY ELECTRICAL CHARACTERISTICS (Refer to the test circuit VS = 1V, RL = 8Ω, Rg = 0Ω, Ta = 2 C). PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Supply Voltage Range 18 V Quiescent Current IQ 2 0 ma Output DC Offset Referred to No Input Signal DCVos 0 mv Potenial Quiescent Output Voltage Vo 7 V Output Power Po THD=%, RL=8Ω THD=1%, RL=8Ω Total Harmonic Distortion THD Gv=30dB, Po=1W, f=1khz 0. % Output Peak Current Ipeak (internally limited) A Input Signal Vin 2.8 Vrms Closed Loop Gain Gv Vol Ctrl>.V db Monitor Out Gain Gvline Vol Ctrl>.V, Zload>30kΩ db Attenuation at Minimum Amin VoL 80 db Vol Ctrl<0.V Volume Bandwidth BW 0.6 MHz W UTC UNISONIC TECHNOLOGIES CO., LTD. 2

3 PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Total Output Noise en f=hz to 22KHz μv Play,max volume f=hz to 22KHz Play,max attenuation 0 20 μv f=hz to 22KHz μv Mute Slew Rate SR 8 V/μs Input Resistance Ri kω Variable Output Resistance Rvar Out 30 0 Ω Variable Output Load Rload var Out 2 kω Supply Voltage Rejection f=1khz, max volume 3 39 C=70μF, VRIP=1Vrms f=1khz, max attenuation 6 db C=70μF, VRIP=1Vrms Thermal Muting TM 10 C Thermal Shutdown Ts 160 C MUTE STANDBY&INPUT SELECTION FUNCTIONS Standby ON Threshold VST ON 3. V Standby OFF Threshold VST OFF 1. V Mute ON Threshold VM ON 3. V Mute OFF Threshold VM OFF 1. V Quiescent Current@Standby IQSTBY ma Mute Attenuation AMUTE 0 6 db Standby bias current IstbyBIAS Stand by on VSTBY=V 80 VMUTE=V μa Play or Mute μa Mute bias current Mute 1 μa ImuteBIAS Play μa APPLICATION SUGGESTIONS The recommended values of the external components are those shown on the application circuit of figure 1. Different values can be used, the following table can help the designer. COMP SUGGESTION LARGER THAN SMALLER THAN PURPOSE ONENT VALUE SUGGESTION SUGGESTION R1 300K Volume control circuit Larger volume regulation time Smaller volume regulation time R2 K Mute time constant Larger mute on/off time Smaller mute on/off time P1 0K Volume control circuit C1 00μF Supply voltage bypass Danger of oscillation C2 70nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff C3 70nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff C 70nF Ripple rejection Better Worse C 0nF Volume control time Constant Larger volume regulation time Smaller volume regulation time C6 00μF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff UTC UNISONIC TECHNOLOGIES CO., LTD. 3

4 COMP SUGGESTION LARGER THAN SMALLER THAN PURPOSE ONENT VALUE SUGGESTION SUGGESTION C7 1μF Mute time costant Larger mute on/off time Smaller mute on/off time C8 00μF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff C9 0nF Supply voltage bypass Danger of oscillation INR C1 00μF PW_ C2 70nF INL C3 70nF C 70μF 1,2,3,13 18,19, 9 C 0nF 6 FIGURE 1. VAROUT R 7 1,16 OP AMP MUTE/STBY PROTECTIONS VAROUT_L R1 300K TP1 OP AMP VOL P1 0K LOG C9 0.1μF 60K APPLICATION CIRCUIT C7 1μF 00μF C8 R2 K C6 00μF PW_ OUTR S1 STBY S_ S2 MUTE OUTL PW_ MUTE STANDBY TRUTH TABLE MUTE STBY OPERATING CONDITION H H STANDBY L H STANDBY H L MUTE L L PLAY UTC UNISONIC TECHNOLOGIES CO., LTD.

5 TURN ON/OFF SEQUENCES (FOR OPTIMIZING THE POP PERFORMANCES) (A) USING MUTE AND STANDBY FUNCTIONS (V) STBY pin#11(v) V pin#(v) 2. MUTE pin#12(v) INPUT (mv) VOUT (V) IQ (ma) OFF STBY MUTE PLAY MUTE STBY OFF (B) USING ONLY THE MUTE FUNCTION To simplify the application, the standby pin can be connected directly to Ground. During the ON/OFF transitions is recommend to respect the following conditions. At the turnon, the transition mute play must be made when the pin is higher than 2.V. At the turnoff, the TDA796L must be brought to mute from the play condition when the pin is higher than 2.V. UTC UNISONIC TECHNOLOGIES CO., LTD.

6 IQ (ma) Quiescent current vs.supply Voltage Vi= Supply Voltage(V) Output DC Voltage vs.supply Voltage Vodc (V) Vi= Supply Voltage(V) Output DC Offset vs.supply Voltage Output Power vs.supply Voltage Vodcvr (V) Vi= Supply Voltage(V) Output Power (W) RL=8 Ohm f=1khz THD=% THD=1% Supply Voltage(V) Distortion (%) =12V RL=8 Ohm f=1khz Distortion vs.output Power f=1khz Output Power(W) Closed Loop gain vs.frequency Closed Loop Gain (db) RL=8 Ohm 27 Pout=0.W 26 Cin=70nF 2 Cout=00uF 2 Csvr=70uF Frequency(KHz) UTC UNISONIC TECHNOLOGIES CO., LTD. 6

7 StBy Attenuatio vs.vpin 11 Mute Attenuation vs.vpin 12 Standby Attenuation (db) RL=8 Ohm 0 0dB@Pout=1W Vpin#11(V). Mute Attenuation (db) 0 RL=8 Ohm dB@Pout=1W Vpin#12(V)..8.2 PIN DESCRIPTION PIN: OUT L K 6K 1K K 6K 1K OUT R 0μA UTC UNISONIC TECHNOLOGIES CO., LTD. 7

8 PINS: INL,INR PINS: VAROUT_L,VAROUT_R INn 6K 00μA VAROUT_L PIN: PIN: MUTE μa VOL MUTE 0 K 0μA PINS: PW_,S_ PINS: VAROUTL,VAROUTR OUT PIN: STBY μa STBY 0 6K UTC UNISONIC TECHNOLOGIES CO., LTD. 8

9 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC UNISONIC TECHNOLOGIES CO., LTD. 9