TDA7057AQ

DATA SHEET Product specification Supersedes data of 1997 July 15 File under Integrated Circuits, IC01 1998 Apr 07 INTEGRATED CIRCUITS TDA7057AQ 2 × 8 W stereo BTL audio output amplifier with DC volume control 1998 Apr 07 2 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ FEATURES • DC volume control • Few external components • Mute mode • Thermal protection • Short-circuit proof • No switch-on and switch-off clicks • Good overall stability • Low power consumption • Low HF radiation • ESD protected on all pins. GENERAL DESCRIPTION The TDA7057AQ is a stereo BTL output amplifier with DC volume control. The device is designed for use in TVs and monitors, but is also suitable for battery-fed portable recorders and radios. Missing Current Limiter (MCL) A MCL protection circuit is built-in. The MCL circuit is activated when the difference in current between the output terminal of each amplifier exceeds 100 mA (typical 300 mA). This level of 100 mA allows for single-ended headphone applications. QUICK REFERENCE DATA ORDERING INFORMATION SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP supply voltage 4.5 − 18 V Pout output power VP = 12 V; RL = 16 Ω 3.0 3.5 − W VP = 12 V; RL = 8 Ω − 5.3 − W VP = 15 V; RL = 8 Ω − 8 − W Gv voltage gain 39.5 40.5 41.5 dB ∆Gv voltage gain control 68 73.5 − dB Iq(tot) total quiescent current VP = 12 V; RL = ∞ − 22 25 mA THD total harmonic distortion Po = 0.5 W − 0.3 1 % TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION TDA7057AQ DBS13P plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm) SOT141-6 1998 Apr 07 3 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ BLOCK DIAGRAM Fig.1 Block diagram. handbook, full pagewidth MSA714 I i I i Ι STABILIZER TEMPERATUREPROTECTIONVref 11 1 3 13 I i I i ΙΙ 8 7 5 10 12 power ground 1 9 power ground 2 6 signal ground 2 not connected input 1 DC volume control 1 input 2 DC volume control 2 TDA7057AQ 4 V P positive output 1 negative output 1 negative output 2 positive output 2 1998 Apr 07 4 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ PINNING SYMBOL PIN DESCRIPTION VC1 1 DC volume control 1 n.c. 2 not connected Vl (1) 3 voltage input 1 VP 4 positive supply voltage Vl (2) 5 voltage input 2 SGND 6 signal ground VC2 7 DC volume control 2 OUT2+ 8 positive output 2 PGND2 9 power ground 2 OUT2− 10 negative output 2 OUT1− 11 negative output 1 PGND1 12 power ground 1 OUT1+ 13 positive output 1 Fig.2 Pin configuration. handbook, halfpage 1 2 3 4 5 6 7 8 9 10 11 12 13 TDA7057AQ VC1 n.c. VP I (1)V I (2)V SGND VC2 OUT2 PGND2 OUT2 OUT1 OUT1 PGND1 MSA716 FUNCTIONAL DESCRIPTION The TDA7057AQ is a stereo output amplifier with two DC volume control stages. The device is designed for TVs and monitors, but is also suitable for battery-fed portable recorders and radios. In conventional DC volume control circuits the control or input stage is AC-coupled to the output stage via external capacitors to keep the offset voltage low. In the TDA7057AQ the two DC volume control stages are integrated into the input stages so that no coupling capacitors are required and a low offset voltage is still maintained. The minimum supply voltage also remains low. The BTL principle offers the following advantages: • Lower peak value of the supply current • The frequency of the ripple on the supply voltage is twice the signal frequency. Consequently, a reduced power supply with smaller capacitors can be used which results in cost reductions. For portable applications there is a trend to decrease the supply voltage, resulting in a reduction of output power at conventional output stages. Using the BTL principle increases the output power. The maximum gain of the amplifier is fixed at 40.5 dB. The DC volume control stages have a logarithmic control characteristic. Therefore, the total gain can be controlled from +40.5 dB to −33 dB. If the DC volume control voltage falls below 0.4 V, the device will switch to the mute mode. The amplifier is a short-circuit protected to ground, VP and across the load. A thermal protection circuit is also implemented. If the crystal temperature rises above +150 °C the gain will be reduced, thereby reducing the output power. Special attention is given to switch-on and switch-off clicks, low HF radiation and a good overall stability. 1998 Apr 07 5 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). THERMAL CHARACTERISTICS Power dissipation Assume VP = 12 V and RL = 16 Ω. The maximum sine wave dissipation is 2 × 1.8 W = 3.6 W. At Tamb(max) = 60 °C: Rth tot = (150 − 60)/3.6 = 25 K/W. Rth tot = Rth j-c + Rth c-hs + Rth hs. Rth c-hs + Rth hs = 25 − 4 = 21 K/W. SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VP supply voltage − 18 V IORM repetitive peak output current − 1.25 A IOSM non-repetitive peak output current − 1.5 A Ptot total power dissipation Tcase < 60 °C − 22.5 W Tamb operating ambient temperature −40 +85 °C Tstg storage temperature −55 +150 °C Tvj virtual junction temperature − 150 °C tsc short-circuit time − 1 hr Vn input voltage pins 1, 3, 5 and 7 − 5 V SYMBOL PARAMETER VALUE UNIT Rth j-c thermal resistance from junction to case 4 K/W Rth j-a thermal resistance from junction to ambient in free air 40 K/W 1998 Apr 07 6 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ CHARACTERISTICS VP = 12 V;Tamb = 25 °C; fi = 1 kHz; RL = 16 Ω; unless otherwise specified (see Fig.13). Notes 1. With a load connected to the outputs the quiescent current will increase, the maximum value of this increase being equal to the DC output offset voltage divided by RL. 2. The noise output voltage (RMS value) at fi = 500 kHz is measured with RS = 0 Ω and bandwidth = 5 kHz. 3. 20 Hz to 300 kHz (typical. 4. The ripple rejection is measured with RS = 0 Ω and f = 100 Hz to 10 kHz. The ripple voltage (Vripple = 200 mV RMS) is applied to the positive supply rail. 5. The channel unbalance is measured with VDC1 = VDC2. 6. The channel unbalance at G1 = 0 dB is measured with VDC1 = VDC2. 7. The noise output voltage (RMS value) is measured with RS = 5 kΩ unweighted. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP voltage supply 4.5 − 18.5 V Iq(tot) total quiescent current VP = 12 V; RL = ∞; note 1 − 22 25 mA Maximum gain; V1,7 ≥ 1.4 V Po output power THD = 10%; RL = 16 Ω 3.0 3.5 − W THD = 10%; RL = 8 Ω − 5.3 − W THD=10%; RL = 8 Ω; VP = 15 V − 8 − W THD total harmonic distortion Po = 0.5 W − 0.3 1 % Gv voltage gain 39.5 40.5 41.5 dB Vi(rms) input signal handling (RMS value) Gv = 0 dB; THD < 1% 1 − − V Vo(n) noise output voltage fi = 500 kHz; note 2 − 210 − µV B bandwidth at −1 dB − note 3 − dB SVRR supply voltage ripple rejection note 4 34 38 − dB VOS DC output offset voltage |V13 - V11| and |V10 - V8| − 0 200 mV Zi input impedance (pins 3 and 5) 15 20 25 kΩ αcs channel separation RS = 5 kΩ 40 − − dB Gv channel unbalance note 5 − − 1 dB G1 = 0 dB; note 6 − − 1 dB Mute position; V1 = V7 =0.4 V ±30 mV Vo(mute) output voltage in mute position Vi = 1.0 V; note 7 − 35 45 µV DC volume control ∆Gv gain control range 68 73.5 − dB lDC volume control current V1 = V7 = 0 V −20 −25 −30 µA 1998 Apr 07 7 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ Fig.3 Quiescent current as a function of supply voltage. handbook, halfpage 0 4 20 VP (V) 40 30 10 0 20 MBG672 8 12 16 Iq (mA) Fig.4 THD as a function of output power. (1) RL = 16 Ω. (2) RL = 8 Ω. handbook, halfpage12 THD (%) Pout (W) 0 8 10−2 10−1 1 MBG675 10 4 (1) (2) Fig.5 THD as a function of frequency. (1) Gv = 40 dB; Po = 0.5 W. (2) Gv = 30 dB; Po = 0.5 W. handbook, halfpage 102 MBG674 10110−2 10−1 f (kHz) THD (%) 10 0 4 8 6 2 (2) (1) Fig.6 Output power as a function of supply voltage. THD = 10%; f = 1 kHz. (1) RL = 8 Ω. (2) RL = 16 Ω. handbook, halfpage12 0 4 8 MBG676 0 204 8 12 16 Po (W) VP (V) (2) (1) 1998 Apr 07 8 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ Fig.7 Total worst case power dissipation as a function of supply voltage. (1) RL = 8 Ω. (2) RL = 16 Ω. handbook, halfpage 0 20 15 5 0 10 MBG677 4 8 12 16 Pd (W) VP (V) (2) (1) Fig.8 Voltage gain as a function of volume control voltage. handbook, halfpage 0 Gv (dB) 2.0 VVC (V) 80 −40 −80 −120 40 0 MBG667 0.4 0.8 1.2 1.6 Fig.9 Noise voltage as a function of volume control voltage. f = 22 Hz to 22 kHz. handbook, halfpage 2.0 VVC (V) 0 10−2 10−1 MBG678 1 0.4 0.8 1.2 1.6 Vno (mV) Fig.10 SVRR as a function of frequency. (1) VDC = 1.4 V; Vripple = 0.2 V. (2) VDC = 0.4 V; Vripple = 0.2 V. handbook, halfpage 102 MBG663 10110−2 10−1 f (kHz) SVRR (dB) −20 −40 −60 −80 0 (1) (2) 1998 Apr 07 9 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ Fig.11 Input signal handling. THD = 1 %. handbook, halfpage 0 20VP (V) Vin (V) 2.0 0 0.4 MBG665 0.8 1.2 1.6 4 8 12 16 Fig.12 Volume control current as a function of volume control voltage. handbook, halfpage 0 IVC (µA) 2.0 VVC (V) 30 −10 −20 −30 20 10 0 MBG666 0.4 0.8 1.2 1.6 APPLICATION INFORMATION The application diagram is illustrated in Fig.13. Test conditions Tamb = 25 °C unless otherwise specified; VP = 12 V; VDC = 1.4 V; fi = 1 kHz; RL = 16 Ω. The quiescent current has been measured without load impedance. The output power as a function of the supply voltage has been measured at THD = 10%. The maximum output power is limited by the maximum power dissipation and the maximum available output current. The maximum input signal voltage is measured at THD = 1% at the output with a voltage gain of 0 dB. To avoid instabilities and too high a distortion, the input ground and power ground must be separated as far as possible and connected as close as possible to the IC. The DC volume control can be applied in several ways. Two possible circuits are shown below the main application diagram. The circuits at the control pin will influence the switch-on and switch-off behaviour and the maximum voltage gain. For single-end applications the output peak current must not exceed 100 mA. At higher output currents the short-circuit protection (MCL) will be active. Thermal considerations: At high junction temperatures (>125 °C) the voltage gain will decrease when it is higher than 0 dB. This results in a decrease of the output voltage and an increase of the distortion level. Thus for an optimal performance of the IC the heatsink has to be designed properly. Calculation example for application: VP = 15 V; RL = 8 Ω, stereo sine wave; worst case sine wave power dissipation is 12 W. For Tamb(max) = 40 °C the thermal resistance from junction to ambient The thermal resistance of the heatsink becomes: Rth h-a = Rth j-a − (Rth j-c + Rth c-h); Rth h-a = 7.1 − (4 + 0.1) = 3 K/W. It should be noted that for ‘music power’ the power dissipation will be approximately half of the sine wave dissipation. Thus a smaller heatsink can be used. Rth j-a 125 40–( ) 12----------------------------- 7.1 K/W= = 1998 Apr 07 10 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ Fig.13 Test and application diagram. (1) This capacitor can be omitted if the 220 µF electrolytic capacitor is connected close to pin 5. (2) RL = 16 Ω. handbook, full pagewidth MBG679 13 11 TEMPERATURE MCL PROTECTION STABILIZER 10 8 9 126 220 µF100 nF 4 (1) (2) (2) VP = 12 V VP = 12 V 5 7 Rs = 5 kΩ 1 MΩ1 µF Rs = 5 kΩ DC- volume signal ground volume control volume control power ground 470 nF 470 nF input 1 input 2 TDA7057AQ 3 1 I − i I + i I + i I − i maximum voltage gain 34 dB 1, 7 22 kΩ 100 kΩ 1 µF maximum voltage gain 40 dB 1, 7 − + − + 1998 Apr 07 11 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ PACKAGE OUTLINE UNIT A e 1A2 bp c D(1) E(1) Z(1)d eDh L L3 m REFERENCESOUTLINE VERSION EUROPEAN PROJECTION ISSUE DATE IEC JEDEC EIAJ mm 17.015.5 4.6 4.2 0.75 0.60 0.48 0.38 24.0 23.6 20.0 19.6 10 3.4 v 0.812.211.8 1.7 e 2 5.08 2.41.6 Eh 6 2.001.45 2.1 1.8 3.4 3.1 4.3 DIMENSIONS (mm are the original dimensions) Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. 12.4 11.0 SOT141-6 0 5 10 mm scale Qj 0.25 w 0.03 x D L E A c A2 m L3 Q w M bp 1 d D Z e 2e e x h 1 13 j Eh non-concave view B: mounting base side 95-03-11 97-12-16 DBS13P: plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm) SOT141-6 v M B 1998 Apr 07 12 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “IC Package Databook” (order code 9398 652 90011). Soldering by dipping or by wave The maximum permissible temperature of the solder is 260 °C; solder at this temperature must not be in contact with the joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. Repairing soldered joints Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 °C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 °C, contact may be up to 5 seconds. DEFINITIONS LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. 1998 Apr 07 13 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ NOTES 1998 Apr 07 14 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ NOTES 1998 Apr 07 15 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control TDA7057AQ NOTES Internet: http://www.semiconductors.philips.com Philips Semiconductors – a worldwide company © Philips Electronics N.V. 1998 SCA59 All rights are reserved. 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. 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