NXP Semiconductors TDA8560Q User Manual

INTEGRATED CIRCUITS

TDA8560Q

2 × 40 W/2 Ω stereo BTL car radio power amplifier with diagnostic facility

Product specification

1996 Jan 08

Supersedes data of March 1994

File under Integrated Circuits, IC01

Philips Semiconductors	Product specification

2 × 40 W/2 Ω 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

·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.

QUICK REFERENCE DATA

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
ïZIï	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 = 10 kW	-	50	-	dB
Gv	closed loop voltage gain			39	40	41	dB
Vno	noise output voltage		Rs = 0 W	-	-	250	mV
ïDVOï	DC output offset voltage			-	-	200	mV
ORDERING INFORMATION
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

2 × 40 W/2 Ω stereo BTL car radio

TDA8560Q

power amplifier with diagnostic facility

BLOCK DIAGRAM

				VP1	VP2
				3	10
1	mute switch	Cm
input 1
				TDA8560Q
	VA					4	output 1A
	365
	Ω
	18 kΩ			PROTECTIONS
			power stage	Load dump
				Soar
				Thermal
	mute switch			Short - circuit
		Cm		Reverse polarity
	VA					6	output 1B
30
kΩ	365
	Ω
	18 kΩ		power stage
	VP
						11	mode switch
	stand-by
	switch		stand-by
			reference
	VA		voltage
	15 kΩ
	x1		mute	DIAGNOSTIC		12	diagnostic
			switch	INTERFACE			output
	15 kΩ
	mute
	reference
13	voltage
	mute switch	Cm
input 2
	VA					9	output 2B
	365
	Ω
	18 kΩ		power stage
	mute switch	Cm
	VA					7	output 2A
30
kΩ	365
	Ω
input	18 kΩ		power stage
reference
voltage
	2	5	8
		GND1	GND2		MEA856 - 1

ground (signal)

power ground (substrate)

Fig.1 Block diagram.

1996 Jan 08

3

Philips Semiconductors

Product specification

2 × 40 W/2 Ω stereo BTL car radio

TDA8560Q

power amplifier with diagnostic facility

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

IN 1	1
GND(S)
	2
V P1
	3
OUT 1A
	4
GND1
	5
OUT 1B
	6
OUT 2A	7 TDA8560Q
GND2
	8
OUT 2B
	9
VP2
	10
MODE	11

VDIAG 12 IN 2 13

MEA855 - 1

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 ³100 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).

handbook, halfpageVO MGA721

0

V12

VP

0

t

Fig.2 Pin configuration.

Fig.3 Distortion detector waveform.

1996 Jan 08

4

Philips Semiconductors

Product specification

2 × 40 W/2 Ω stereo BTL car radio

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 μs to see whether the short-circuit is still present. Due to this duty cycle of 50 μs/20 ms the average current consumption during this short-circuit condition is very low (approximately 40 mA).

During this short-circuit condition, pin 12 is low for 20 ms and high for 50 μs (see Fig.4).

The power dissipation in any short-circuit condition is very low.

TEMPERATURE DETECTION

When the virtual junction temperature Tvj reaches 150 °C, pin 12 will become continuously low.

OPEN COLLECTOR OUTPUT

Pin 12 is an open collector output, which allows pin 12 of more devices being tied together.

andbook, full pagewidthcurrent								MGA722
in
output
stage

t

short-circuit over the load

V12

20 ms

VP

t

50 μs

Fig.4 Short-circuit waveform.

1996 Jan 08

5