Philips TDA1560Q Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA1560Q

40 W car radio high power amplifier

Product speciﬁcation Supersedes data of 1995 Jul 07 File under Integrated Circuits, IC01

1996 May 14

Philips Semiconductors Product speciﬁcation

40 W car radio high power ampliﬁer TDA1560Q

FEATURES

• Very high output power

• Low power dissipation when used for music signals

• Switches to low output power in the event of excessive

heatsink temperatures

• Requires few external components

GENERAL DESCRIPTION

The TDA1560Q is an integrated Bridge-Tied Load (BTL) class-H high power amplifier. In a load of 8 Ω, the output power is 40 W typical at a THD of 10%.

The encapsulation is a 17-lead DIL-bent-SIL plastic power package. The device is primarily developed for car radio applications.

• Fixed gain

• Low cross-over distortion

• No switch-on/switch-off plops

• Mode select switch

• Low offset voltage at the output

• Load dump protection

• Short-circuit safe to ground, V

and across load

• Protected against electrostatic discharge

• Thermally protected

• Diagnostic facility

• Flexible leads.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

supply voltage operating 8.0 14.4 18 V

non-operating −−30 V load dump protected −−45 V

ORM

q(tot)

SVRR supply voltage ripple rejection f

repetitive peak output current −−4A total quiescent current − 100 160 mA standby current − 550µA voltage gain 29 30 31 dB output power RL=8Ω; THD = 10% − 40 − W

=8Ω; THD = 0.5% − 30 − W

= 100 Hz to 10 kHz;

48 55 − dB

RS=0Ω

Z

 input impedance 180 300 − kΩ

∆V

 DC output offset voltage −−150 mV

noise output voltage − 100 300 µV

ORDERING INFORMATION

PACKAGE

TYPE NUMBER

NAME DESCRIPTION VERSION

TDA1560Q DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1

1996 May 14 2

Philips Semiconductors Product speciﬁcation

40 W car radio high power ampliﬁer TDA1560Q

BLOCK DIAGRAM

handbook, full pagewidth

MODE

INP

ref

GND

13 10

10 k

Ω

TEMPERATURE

SENSOR

disable

SUPPLY

TDA1560Q

150 k

Ω

150 k

DEC

Ω

INPUT AND FEEDBACK

CIRCUIT

15 k

Ω

voltage

reference

disable

POWER

STAGE

POWER

STAGE

SUPPLY

LOAD DUMP

TEMPERATURE

AND CURRENT

PROTECTION

12 6

GND GND

DIAG

OUT1

OUT2

MCD334 - 1

Fig.1 Block diagram.

1996 May 14 3

Philips Semiconductors Product speciﬁcation

40 W car radio high power ampliﬁer TDA1560Q

PINNING

SYMBOL PIN DESCRIPTION

INP INP

p n

1 positive input

2 negative input GND 3 ground V C2

ref

4 reference voltage

5 capacitor C2 negative terminal GND 6 ground OUT1 C2

OUT2

7 output 1 (negative)

8 capacitor C2 positive terminal

9 supply voltage

10 capacitor C1 positive terminal

11 output 2 (positive) GND 12 ground C1 V C

DIAG

DEC

13 capacitor C1 negative terminal

14 diagnostic voltage output

15 decoupling MODE 16 mode select switch input S1 17 class-B/class-H input switch

handbook, halfpage

INP INP

GND

OUT1

OUT2

GND

DIAG

DEC

MODE

3 4

ref

6 7

TDA1560Q

12 13

14 15 16 17

MCD329 - 1

Fig.2 Pin configuration.

1996 May 14 4

Philips Semiconductors Product speciﬁcation

40 W car radio high power ampliﬁer TDA1560Q

FUNCTIONAL DESCRIPTION

The TDA1560Q contains a mono class-H BTL output power amplifier. At low output power, up to 10 W, the device operates as a normal BTL amplifier. When a larger output voltage swing is required, the internal supply voltage is lifted to approximately twice the external supply voltage. This extra supply voltage is obtained from the charge in the external electrolytic capacitors. Due to this momentarily higher supply voltage, the maximum output power is 40 W typical at a THD of 10%.

In normal use, when the output is driven with music-type signals, the high output power is only required for a small percentage of the time. Assuming a music signal has a normal (Gaussian) amplitude distribution, the reduction in dissipation is approximately 50% when compared to a class-B output amplifier with the same output power. The heatsink should be designed for use with music signals.

If the device is continuous sine wave driven, instead of driven with music signals and at a high output power (class-H operation), the case temperature can rise above 120 °C with such a practical heatsink. In this event, the thermal protection disables the high power supply voltage and limits the output power to 10 W and the maximum dissipation to 5 W.

The gain of each amplifier is internally fixed at 30 dB. With the mode select input the device can be switched to the following modes:

• Low standby current (<50 µA)

• Mute condition, DC adjusted

• On, operation in class-B, limited output power

• On, operation in class-H, high output power.

The open voltage on the class-B/class-H pin is related to the global temperature of the crystal. By measuring this voltage, external actions can be taken to reduce an excessive temperature (e.g. by cutting off low frequencies or externally switching to class-B). For the relationship between the crystal temperature and the voltage on this pin, see Fig.3.

By forcing a high voltage level on the class-B/class-H pin, thereby simulating a high temperature, the device can be externally switched to class-B operation. Similarly, by forcing a low voltage level on the class-B/class-H pin, thereby simulating a low temperature, the device can be forced into class-H operation, even if the case temperature exceeds 120 °C.

The device is fully protected against short-circuiting of the outputs to ground or V

and across the load, high crystal

temperature and electrostatic discharge at all input and output pins. In the event of a continuing short-circuit to ground or VP, excessive dissipation is prevented because the output stages will be switched off. The output stages will be switched on again within 20 ms after the short-circuit has been removed.

A diagnostic facility is available at pin 14. In normal conditions the voltage at this pin will be the supply voltage (VP). In the event of the following conditions:

• Junction temperature exceeds 150 °C

• Short-circuit of one of the outputs to ground or to V

• Load dump; VP>20V. The voltage level at pin 14 will be at a constant level of

approximately1⁄2VP during fault condition. At a short-circuit over the load, pin 14 will be at1⁄2VP for approximately 20 ms and VP for approximately 50 µs.

The device can be used as a normal BTL class-AB amplifier if the electrolytic capacitors C1 and C2 are omitted; see Fig.6. If the case temperature exceeds 120 °C, the device will switch back from class-H to class-B operation. The high power supply voltage is then disabled and the output power is limited to 10 W. By measuring the voltage on the class-B/class-H pin, the actual crystal temperature can be detected.

1996 May 14 5

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