Philips TDA8562Q Datasheet

INTEGRATED CIRCUITS

TDA8562Q

4 x 12 W single-ended car radio power amplifier with dynamic distortion detector and diagnostic interface

Product specification			July 1994
File under Integrated Circuits, IC01

Philips Semiconductors	Product specification

4 x 12 W single-ended car radio power amplifier with

TDA8562Q

dynamic distortion detector and diagnostic interface

FEATURES

·Requires very few external components

·High output power

·Fixed gain

·Diagnostic facility (distortion, short-circuit and temperature detection)

·Good ripple rejection

·Mode select switch (operating, mute and stand-by)

·Load dump protection

·AC and DC short-circuit safe to ground and to VP

·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

·Identical inputs.

GENERAL DESCRIPTION

The TDA8562Q is an integrated class-B output amplifier in a 17-lead single-in-line (SIL) power package. It contains 4 ´ 12 W single-ended amplifiers.

QUICK REFERENCE DATA

SYMBOL	PARAMETER	CONDITIONS	MIN.	TYP.	MAX.	UNIT
VP	positive operating supply voltage		6	14.4	18	V
IORM	repetitive peak output current		-	-	4	A
IP	total quiescent current		-	80	-	mA
Isb	stand-by current		-	0.1	100	mA
Po	output power	THD = 10%
		4 W	-	7	-	W
		2 W	-	12	-	W
RR	supply voltage ripple rejection		48	-	-	dB
Vno	noise output voltage	Rs = 0 W	-	50	-	mV
ïZIï	input impedance		50	-	-	kW

ORDERING INFORMATION

EXTENDED TYPE NUMBER			PACKAGE
	PINS	PIN POSITION		MATERIAL	CODE
TDA8562Q(1)	17	DBS		plastic	SOT243R

Note

1. SOT243-1; 1996 August 21.

July 1994

2

Philips Semiconductors	Product specification

4 x 12 W single-ended car radio power amplifier with

TDA8562Q

dynamic distortion detector and diagnostic interface

					VP1	VP2
	1				5	13
input 1			mute switch	Cm
		60			TDA8562Q
		kΩ
			VA			6	output 1
		2
		kΩ
			18 kΩ		power stage
			mute switch	Cm
		60
	3	kΩ
input 2						8
			VA				output 2
		2
		kΩ
			18 kΩ		power stage
			VP
						14	mode
							select
			stand-by
							switch
			switch		stand-by
					reference
			VA		voltage
			PROTECTIONS
				thermal	mute
			15 kΩ	short-circuit
					switch
			x1			16	diagnostic
supply voltage	4		15 kΩ				output
ripple rejection
			mute
			reference
	17		voltage
input 4			mute switch	Cm
		60
		kΩ
			VA			12	output 4
		2
		kΩ
			18 kΩ		power stage
			mute switch	Cm
		60
	15	kΩ
input 3						10
			VA				output 3
		2
		kΩ
		input	18 kΩ		power stage
		reference
	2	voltage	9	7	11
				GND1	GND2	MEA865 - 1
	ground		not connected		power ground (substrate)
	(signal)

Fig.1 Block diagram.

July 1994

3

Philips Semiconductors	Product specification

4 x 12 W single-ended car radio power amplifier with

TDA8562Q

dynamic distortion detector and diagnostic interface

PINNING

SYMBOL	PIN	DESCRIPTION
IN 1	1	input 1
GND(S)	2	signal ground
IN 2	3	input 2
RR	4	supply voltage ripple rejection
VP1	5	supply voltage
OUT 1	6	output 1
GND1	7	power ground 1
OUT 2	8	output 2
n.c.	9	not connected
OUT 3	10	output 3
GND2	11	power ground 2
OUT 4	12	output 4
VP2	13	supply voltage
MODE	14	mode select switch input
IN 3	15	input 3
VDIAG	16	diagnostic output
IN 4	17	input 4

The device is primarily developed for car radio applications.

FUNCTIONAL DESCRIPTION

The TDA8562Q contains four identical amplifiers and can be used for single-ended applications. The gain of each amplifier is fixed at 20 dB. Special features of the device are:

handbook, halfpage
IN 1	1
GND(S)
	2
IN 2
	3
RR
	4
V P1
	5
OUT 1
	6
GND1
	7
OUTP 2
	8
n.c.		TDA8562Q
	9
OUT 3
	10
GND2	11
OUTP 4	12
V P2
	13
MODE
	14
IN 3
	15
V DIAG
	16
IN 4
	17

MEA866 - 1

Fig.2 Pin configuration.

Diagnostic output (pin 16)

DYNAMIC DISTORTION DETECTOR (DDD)

Mode select switch (pin 14)

·low stand-by current (< 100 mA)

·low switching current (low cost supply switch)

·mute facility

To avoid switch-on plops, it is advised to keep the amplifier in the mute mode during ³ 100 ms (charging of the input capacitors at pin 1, 3, 15 and pin 17).

This can be achieved by:

·microprocessor control

·external timing circuit (see Fig.7)

At the onset of clipping of one or more output stages, the dynamic distortion detector becomes active and pin 16 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 16 is independent of the number of channels that are clipping (see Fig.3).

July 1994

4

Philips Semiconductors	Product specification

4 x 12 W single-ended car radio power amplifier with

TDA8562Q

dynamic distortion detector and diagnostic interface

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 16 is continuously low.

When a short-circuit across the load of one or more 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 16 is low for 20 ms and high for 50 μs (see Fig.4).

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

handbook, halfpage	VO	MGA706
	0
	V16
	VP
	0	t

Fig.3 Distortion detector waveform.

TEMPERATURE DETECTION

OPEN COLLECTOR OUTPUT

When the virtual junction temperature Tvj reaches 150 °C, pin 16 will be active LOW.

Pin 16 is an open collector output, which allows pin 16 of more devices being tied together.

current

MGA707

in output stage

t

short-circuit over the load

V15

20 ms

VP

t

50 μs

Fig.4 Short-circuit waveform.

July 1994

5