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40 W/2 W stereo BTL car radio TDA8560Q power amplifier with diagnostic facility FEATURES • Requires very few external components • High output power • 4 W and 2 W load impedance • Low output offset voltage • Fixed gain • Diagnostic facility (distortion, short-circuit and temperature detection) • Good ripple rejection • Mode select switch (operating, mute and standby) • Load dump protection • Short-circuit safe to ground, to VP and across the load • Low power dissipation in any short-circuit condition QUICK REFERENCE DATA ORDERING INFORMATION • Thermally protected • Reverse polarity safe • Electrostatic discharge protection • No switch-on/switch-off plop • Flexible leads • Low thermal resistance. GENERAL DESCRIPTION The TDA8560Q is an integrated class-B output amplifier in a 13-lead single-in-line (SIL) power package. It contains 2 . 40 W/2 W amplifiers in BTL configuration. The device is primarily developed for car radio applications. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP operating supply voltage 6.0 14.4 18 V IORM repetitive peak output current - - 7.5 A Iq(tot) total quiescent current - 115 - mA Isb standby current - 0.1 100 mA Isw switch-on current - - 40 mA iZIi input impedance 25 30 - kW Po output power RL =4 W; THD = 10% - 25 - W RL =2 W; THD = 10% - 40 - W SVRR supply voltage ripple rejection Rs =0 W - 45 - dB acs channel separation Rs =10kW - 50 - dB Gv closed loop voltage gain 39 40 41 dB Vno noise output voltage Rs =0 W - - 250 mV iDVOi DC output offset voltage - - 200 mV TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION TDA8560Q DBS13P plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm) SOT141-6 1996 Jan 08 2 Philips Semiconductors Product specification Philips Semiconductors Product specification TDA8560Q power amplifier with diagnostic facility BLOCK DIAGRAM Fig.1 Block diagram. mode switch MEA856 - 1 output 1A 15 kW 15 kW x1 VA stand-by switch VP mute switch stand-by reference voltage PROTECTIONS Load dump Soar Thermal Short - circuit Reverse polarity 3 10 VP1 VP2 18 kW 365 W mute switch VA Cm power stage 18 kW mute switch VA Cm power stage 30 kW 4 6 11 18 kW mute switch VA Cm power stage 18 kW mute switch VA Cm power stage 30 kW 9 7 2 5 8 ground (signal) GND1 GND2 power ground (substrate) output 2B output 2A output 1B input 1 input 2 13 1 TDA8560Q mute reference voltage input reference voltage 365 W 365 W 365 W 12 diagnostic output DIAGNOSTIC INTERFACE 1996 Jan 08 3 Philips Semiconductors Product specification Philips Semiconductors Product specification TDA8560Q power amplifier with diagnostic facility 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. 1 2 3 4 5 6 7 8 9 10 11 12 13 MEA855 - 1 TDA8560Q IN 1 GND(S) VP1 OUT 1A GND1 OUT 1B OUT 2A GND2 OUT 2B VP2 MODE IN 2 V DIAG PINNING FUNCTIONAL DESCRIPTION The TDA8560Q contains two identical amplifiers and can be used for bridge applications. The gain of each amplifier is fixed at 40 dB. Special features of the device are as follows. Mode select switch (pin 11) · Standby: low supply current (<100 mA) · Mute: input signal suppressed · Operating: normal on condition. Since this pin has a very low input current (<40 mA), 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). 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). VO 0 MGA721 V 12 VP 0 t Fig.3 Distortion detector waveform. 1996 Jan 08 4 Philips Semiconductors Product specification Philips Semiconductors Product specification TDA8560Q power amplifier with diagnostic facility SHORT-CIRCUIT PROTECTION When a short-circuit occurs at one or more outputs to ground or to the supply voltage, the output stages are switched off until the short-circuit is removed and the device is switched on again, with a delay of approximately 20 ms, after removal of the short-circuit. During this short-circuit condition, pin 12 is continuously low. When a short-circuit across the load of one or both channels occurs the output stages are switched off during approximately 20 ms. After that time it is checked during approximately 50 ms to see whether the short-circuit is still present. Due to this duty cycle of 50 ms/20 ms the average current...