tda2614 NXP Semiconductors, tda2614 Datasheet - Page 4

• Manufacturer Part Number: tda2614
• Description: 6 W Hi-fi Audio Power Amplifier
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PINNING
July 1994
n.c.
MUTE
1/2V
n.c.
GND/ V
OUT
V
INV
handbook, halfpage
SYMBOL
INV
P
6 W hi-fi audio power amplifier
P
/GND
1/2 V
P
GND / – V
P
MUTE
/ GND
PIN
– INV
OUT
1
2
3
4
5
6
7
8
9
INV
n.c.
n.c.
V
Fig.2 Pin configuration.
P
P
not connected
mute input
1/2 supply (or ground at
symmetrical power supplies)
not connected
ground (or negative supply rail at
symmetrical power supplies)
output
supply voltage
inverting input
non-inverting input
3
4
1
2
5
6
7
8
9
TDA2614
MCD367 - 1
DESCRIPTION
4
FUNCTIONAL DESCRIPTION
The TDA2614 is a hi-fi power amplifier designed for mains
fed applications, such as radio and TV. The circuit is
optimally designed for asymmetrical power supplies, but is
also well-suited to symmetrical power supply systems.
An output power of 6 W (THD = 0.5%) can be delivered
into an 8
fixed at 30 dB, thus offering a low gain spread.
A special feature is the input mute circuit. This circuit
disconnects the non-inverting input when the supply
voltage drops below 10 V, while the amplifier still retains its
DC operating adjustment. The circuit features suppression
of unwanted signals at the input, during switch-on and
switch-off.
The mute circuit can also be activated via pin 2. When a
current at 300 A 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 measure 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 8 K/W, the heatsink can be
calculated as follows:
at R
With a maximum ambient temperature of 60 C, the
thermal resistance of the heatsink is:
R
th
L
=
= 8
150 60
--------------------- - 8
4.1
load with a supply of 24 V. The gain is internally
–
and V
–
S
= 24 V, dissipation is 4.1 W.
=
14 K/W.
Product specification
TDA2614