Datasheet TDA7052A, TDA7052AT (NXP) - 4

NXP Semiconductors Product specification 1 W BTL mono audio amplifier with DC TDA7052A/AT volume control
FUNCTIONAL DESCRIPTION
Thus a reduced power supply with smaller capacitors can be used which results in cost savings. The TDA7052A/AT are mono BTL output amplifiers with DC volume control, designed for use in TV and monitors For portable applications there is a trend to decrease the but also suitable for battery fed portable recorders and supply voltage, resulting in a reduction of output power at radios. conventional output stages. Using the BTL principle increases the output power. In conventional DC volume circuits the control or input stage is AC coupled to the output stage via external The maximum gain of the amplifier is fixed at 35.5 dB. The capacitors to keep the offset voltage low. DC volume control stage has a logarithmic control characteristic. In the TDA7052A/AT the DC volume control stage is integrated into the input stage so that no coupling The total gain can be controlled from 35.5 dB to −44 dB. If capacitors are required and yet a low offset voltage is the DC volume control voltage is below 0.3 V, the device maintained. At the same time the minimum supply remains switches to the mute mode. low. The amplifier is short-circuit proof to ground, VP and The BTL principle offers the following advantages: across the load. Also a thermal protection circuit is • Lower peak value of the supply current implemented. If the crystal temperature rises above +150 °C the gain will be reduced, so the output power is • The frequency of the ripple on the supply voltage is twice reduced. the signal frequency. Special attention is given to switch on and off clicks, low HF radiation and a good overall stability.
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134)
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
VP supply voltage range − 18 V IORM repetitive peak output current − 1.25 A IOSM non-repetitive peak output current − 1.5 A Ptot total power dissipation Tamb ≤ 25% TDA7052A − 1.25 W TDA7052AT − 0.8 W Tamb operating ambient temperature range −40 +85 °C Tstg storage temperature range −55 +150 °C Tvj virtual junction temperature − +150 °C Tsc short-circuit time − 1 hr V2 input voltage pin 2 − 8 V V4 input voltage pin 4 − 8 V July 1994 4 Document Outline Features General description Missing Current Limiter (MCL) Quick reference data Ordering information Pinning Functional description Limiting values Thermal resistance Characteristics Application information Package outlines Soldering Introduction DIP SO Data sheet status Disclaimers