TDA8946 Philips Semiconductors, TDA8946 Datasheet - Page 14

• Manufacturer Part Number: TDA8946
• Description: 2 x 15 W stereo Bridge Tied Load BTL audio amplifier
• Manufacturer: Philips Semiconductors

14. Application information
Philips Semiconductors
9397 750 06863
Product specification
Fig 14. Application diagram.
MICROCONTROLLER
Standby
MODE
Mute
On
C1
14.1.1 Layout and grounding
0
0
1
14.1 Printed-circuit board (PCB)
Symmetrical
input
Asymmetrical
input
C2
0
1
0
signal
GND
C1
C2
R s
R s
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.
220 nF
220 nF
220 nF
220 nF
V CC
C i
C i
R
R
signal
GND
1.5
1.5
nF
nF
MODE
IN1
IN1
IN2
IN2
SVR
10
F
Rev. 02 — 14 March 2000
8
6
9
12
10
11
R i
45 k
R i
45 k
R i
45 k
R i
45 k
MUTE LOGIC
1/2 V CC
1/2 V CC
STANDBY/
TDA8946J
1/2 V CC
3
20 k
20 k
V CC
16
1/2 V CC
1/2 V CC
2
SHORT CIRCUIT
TEMPERATURE
2 x 15 W stereo BTL audio amplifier
PROTECTION
30 k
30 k
30 k
AND
15
100 nF
14
17
MGU014
1
4
© Philips Electronics N.V. 2000. All rights reserved.
GND
OUT1
OUT1
OUT2
OUT2
TDA8946J
1000 F
R L
8
R L
8
V CC
14 of 23