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TDA2615

2×6 W hi-fi audio power amplifier

Philips Electronics 

Philips Semiconductors

2 × 6 W hi-fi audio power amplifier

Product specification

TDA2615

PINNING

SYMBOL

−INV1

MUTE

1⁄2VP/GND

OUT1

−VP

OUT2

+VP

INV1, 2

−INV2

PIN

DESCRIPTION

1 non-inverting input 1

2 mute input

3 1⁄2 supply voltage or ground

4 output 1

5 supply voltage (negative)

6 output 2

7 supply voltage (positive)

8 inverting input 1 and 2

9 non-inverting input 2

INV1 1

MUTE 2

1/2 VP / GND 3

OUT1 4

VP 5

OUT2 6

+ VP 7

INV1, 2 8

TDA2615

INV2 9

MLA708

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

The TDA2615 is a hi-fi stereo amplifier designed for mains

fed applications, such as stereo radio and stereo TV. The

circuit is optimally designed for symmetrical power

supplies, but is also well-suited to asymmetrical power

supply systems.

An output power of 2 × 6 W (THD = 0.5%) can be

delivered into an 8 Ω load with a symmetrical power supply

of ±12 V. The gain is internally fixed at 30 dB, thus offering

a low gain spread and a very good gain balance between

the two amplifiers (0.2 dB).

A special feature is the input mute circuit. This circuit

disconnects the non-inverting inputs when the supply

voltage drops below ±6 V, while the amplifier still retains its

DC operating adjustment. The circuit features suppression

of unwanted signals at the inputs, during switch-on and

switch-off.

The mute circuit can also be activated via pin 2. When a

current of 300 µA is present at pin 2, the circuit is in the

mute condition.

The device is provided with two thermal protection circuits.

One circuit measures the average temperature of the

crystal and the other measures the momentary

temperature of the power transistors. These control

circuits attack at temperatures in excess of +150 °C, so a

crystal operating temperature of max. +150 °C can be

used without extra distortion.

With the derating value of 6 K/W, the heatsink can be

calculated as follows:

at RL = 8 Ω and VS = ±12 V, the measured maximum

dissipation is 7.8 W.

With a maximum ambient temperature of +60 °C, the

thermal resistance of the heatsink is:

Rth = 1----5---0-7---.-–-8----6---0-- – 6 = 5.5 K/W

The metal tab has the same potential as pin 5.

1995 May 08

4

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