tfa9842j-n1 NXP Semiconductors, tfa9842j-n1 Datasheet - Page 14

• Manufacturer Part Number: tfa9842j-n1
• Description: 2-channel Audio Amplifier; Se 1 W To 7.5 W; Btl 2 W To 15 W
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 12013
Preliminary data
Fig 13. BTL application diagram.
V i
22 F
13.1.1 Layout and grounding
CONTROLLER
13.1 Printed-circuit board
470 nF
MICRO-
MODE
Remark: Because of switching inductive loads, the output voltage can rise beyond
the maximum supply voltage of 28 V. At high supply voltages, it is recommended to
use (Schottky) diodes to the supply voltage and ground.
To obtain a high-level system performance, 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.
IN1
IN2
CIV
4
1
3
7
60 k
60 k
TFA9842J
STANDBY
Rev. 01 — 26 April 2004
V CC
9
5
MUTE
GND
ON
V REF
SHORT-CIRCUIT
TEMPERATURE
V CC
PROTECTION
AND
2-channel audio amplifier (2 x SE or 1 x BTL)
0.5V CC
6
8
2
MDB804
SVR
OUT1
OUT2
100 nF
150 F
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
R L
8
1000 F
TFA9842J
V CC
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