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TDA7057AQ Dataheets PDF



Part Number TDA7057AQ
Manufacturers NXP
Logo NXP
Description 2 x 8 W stereo BTL audio amplifier
Datasheet TDA7057AQ DatasheetTDA7057AQ Datasheet (PDF)

INTEGRATED CIRCUITS DATA SHEET TDA7057AQ 2 × 8 W stereo BTL audio output amplifier with DC volume control Product specification Supersedes data of 1997 July 15 File under Integrated Circuits, IC01 1998 Apr 07 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control 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 p.

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INTEGRATED CIRCUITS DATA SHEET TDA7057AQ 2 × 8 W stereo BTL audio output amplifier with DC volume control Product specification Supersedes data of 1997 July 15 File under Integrated Circuits, IC01 1998 Apr 07 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control 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. QUICK REFERENCE DATA SYMBOL VP Pout output power PARAMETER supply voltage VP = 12 V; RL = 16 Ω VP = 12 V; RL = 8 Ω VP = 15 V; RL = 8 Ω Gv ∆Gv Iq(tot) THD voltage gain voltage gain control total quiescent current total harmonic distortion VP = 12 V; RL = ∞ Po = 0.5 W CONDITIONS MIN. 4.5 3.0 − − 39.5 68 − − GENERAL DESCRIPTION TDA7057AQ 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. TYP. − 3.5 5.3 8 40.5 73.5 22 0.3 MAX. 18 − − − 41.5 − 25 1 UNIT V W W W dB dB mA % ORDERING INFORMATION TYPE NUMBER TDA7057AQ PACKAGE NAME DBS13P DESCRIPTION plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm) VERSION SOT141-6 1998 Apr 07 2 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control BLOCK DIAGRAM TDA7057AQ V handbook, full pagewidth P 4 TDA7057AQ input 1 DC volume control 1 3 1 I I i 13 positive output 1 Ι i 11 negative output 1 Vref STABILIZER TEMPERATURE PROTECTION input 2 DC volume control 2 5 7 I i 10 negative output 2 ΙΙ I i 8 positive output 2 2 6 12 9 MSA714 not connected signal ground power ground 1 power ground 2 Fig.1 Block diagram. 1998 Apr 07 3 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control PINNING SYMBOL VC1 n.c. Vl (1) VP Vl (2) SGND VC2 OUT2+ PGND2 OUT2− OUT1− PGND1 OUT1+ PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 DESCRIPTION DC volume control 1 not connected voltage input 1 positive supply voltage voltage input 2 signal ground DC volume control 2 positive output 2 power ground 2 negative output 2 negative output 1 power ground 1 positive output 1 OUT2 OUT1 PGND1 OUT1 10 11 12 13 handbook, halfpage TDA7057AQ VC1 n.c. V I (1) VP V I (2) SGND VC2 OUT2 PGND2 1 2 3 4 5 6 7 8 9 TDA7057AQ MSA716 Fig.2 Pin configuration. 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 4 Philips Semiconductors Product specification 2 × 8 W stereo BTL audio output amplifier with DC volume control LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP IORM IOSM Ptot Tamb Tstg Tvj tsc Vn PARAMETER supply voltage repetitive peak output current non-repetitive peak output current total power dissipation operating ambient temperature storage temperature virtual junction temperature short-circuit time input voltage pins 1, 3,.


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