TDA8946AJ Datasheet, PDF (14/20 Pages) NXP Semiconductors – 2 x 15 W BTL audio amplifier with DC gain control

Philips Semiconductors
14. Application information
TDA8946AJ
2 x 15 W BTL audio amplifier with DC gain control
handbook, full pagewidth
Rsource
IN1− 8
220 nF 4.7
Vi
nF
220 nF
(1)
IN1+
6
VCC1
3
VCC2
16
100 nF
1 OUT1−
4 OUT1+
or
GC 13
TDA8946AJ
Rsource
IN2− 9
220 nF 4.7
Vi
nF
220 nF
(1)
IN2+
12
14 OUT2^−
17 OUT2⁺
MICROCONTROLLER
MODE 10 STANDBY/
MUTE LOGIC
SVR 11
10 µF
7
SGND
VCC
20
kΩ
SHORT CIRCUIT
AND
TEMPERATURE
20
PROTECTION
kΩ
2
15
GND1 GND2
MGW627
VCC
1000 µF
RL
220 nF
8Ω 4Ω
4Ω
220 nF
RL
220 nF
8Ω 4Ω
4Ω
220 nF
Fig 15. Application diagram.
14.1 Printed-circuit board
14.1.1 Layout and grounding
For a high system performance level certain grounding techniques are essential.
The input reference grounds have to be tied with their respective source grounds and
must have separate tracks from the power ground tracks; this will prevent the large
(output) signal currents from interfering with the small AC input signals. The
small-signal ground tracks should be physically located as far as possible from the
power ground tracks. Supply and output tracks should be as wide as possible for
delivering maximum output power.
9397 750 09434
Product data
Rev. 01 — 01 March 2002
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
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