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TDA8563AQ Folha de dados(PDF) 4 Page - NXP Semiconductors |
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TDA8563AQ Folha de dados(HTML) 4 Page - NXP Semiconductors |
4 / 20 page 1997 Feb 20 4 Philips Semiconductors Product specification 2 × 40 W/2 Ω stereo BTL car radio power amplifier with diagnostic facility TDA8563AQ PINNING SYMBOL PIN DESCRIPTION IN 1 1 input 1 GND(S) 2 signal ground VP1 3 supply voltage 1 OUT 1A 4 output 1A GND1 5 power ground 1 OUT 1B 6 output 1B OUT 2A 7 output 2A GND2 8 power ground 2 OUT 2B 9 output 2B VP2 10 supply voltage 2 MODE 11 mode switch input VDIAG 12 diagnostic output IN 2 13 input 2 Fig.2 Pin configuration. handbook, halfpage 1 2 3 4 5 6 7 8 9 10 11 12 13 MGL075 TDA8563AQ IN 1 GND(S) V P1 OUT 1A GND1 OUT 1B OUT 2A GND2 OUT 2B VP2 MODE IN 2 DIAG V FUNCTIONAL DESCRIPTION The TDA8563AQ contains two identical amplifiers and can be used for bridge applications. The gain of each amplifier is fixed at 26 dB. Special features of the device are as follows. Mode select switch (pin 11) • Standby: low supply current (<100 µA) • Mute: input signal suppressed • Operating: normal on condition. Since this pin has a very low input current ( <40 µA), a low cost supply switch can be applied. To avoid switch-on plops, it is advised to keep the amplifier in the mute mode during ≥100 ms (charging of the input capacitors at pin 1 and pin 13). During switching from standby to mute, the slope should be at least 18 V/s. This can be achieved by: • Microprocessor control • External timing circuit (see Fig.7). Diagnostic output (pin 12) DYNAMIC DISTORTION DETECTOR (DDD) At the onset of clipping of one or more output stages, the dynamic distortion detector becomes active and pin 12 goes low. This information can be used to drive a sound processor or DC volume control to attenuate the input signal and thus limit the distortion. The output level of pin 12 is independent of the number of channels that are clipping (see Fig.3). Fig.3 Distortion detector waveform. handbook, halfpage V 0 VP VO 0 t MGA721 12 |
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