Application Information; Printed-Circuit Board (Pcb); Layout And Grounding - Philips TDA8943SF Datasheet

Philips Semiconductors

14. Application information

handbook, full pagewidth
R s
Symmetrical
input
R s
Asymmetrical
input
signal
GND
C1
MICROCONTROLLER
C2
C1 C2
MODE
Standby 0 0
Mute 0 1
On 1 0
Fig 13. Application diagram.

14.1 Printed-circuit board (PCB)

14.1.1 Layout and grounding

9397 750 06865
Product specification
220 nF
C i
IN
5
R i
220 nF
45 k
220 nF
1.5
nF
R i
C i
45 k
4
IN
220 nF
TDA8943SF
V CC
R
MODE
7
MUTE LOGIC
R
SVR 6
signal
GND
10
F
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.
Rev. 02 — 7 April 2000
6 W mono Bridge Tied Load (BTL) audio amplifier
2
30 k
1/2 V CC
1/2 V CC
30 k
V CC
STANDBY/
20 k
SHORT CIRCUIT
1/2 V CC
TEMPERATURE
PROTECTION
20 k
8
TDA8943SF
V CC
100 nF 1000 F
1 OUT
R L
8
3 OUT
AND
GND
MGU036
© Philips Electronics N.V. 2000. All rights reserved.
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