TFA9842BJ/N1,112 NXP Semiconductors, TFA9842BJ/N1,112 Datasheet - Page 10

• Manufacturer Part Number: TFA9842BJ/N1,112
• Description: IC AMP AUDIO PWR 7.5W STER 9SIL
• Manufacturer: NXP Semiconductors
• Type: Class ABr

Specifications of TFA9842BJ/N1,112

• Package / Case: 9-SIL (Bent and Staggered Leads)
• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 7.5W x 2 @ 4 Ohm
• Voltage - Supply: 9 V ~ 26 V
• Features: Depop, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Product: Class-AB
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-3452-5; 935275785112; TFA9842BJ

Philips Semiconductors
13. Application information
9397 750 12847
Preliminary data sheet
Fig 12. Application diagram.
controller
micro-
7.5 V
k
1.5
k
10
13.2.1 Layout and grounding
13.1 Application diagram
13.2 Printed-circuit board
k
50
BC547
100
k
Remark: Switching inductive loads, the output voltage can rise beyond the maximum
supply voltage of 28 V. At high supply voltage 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.
BC547
270
V
CC
2.2
F
V
V
i
i
47
F
220 nF
220 nF
22
F
MODE
SVR 6
Rev. 01 — 1 March 2004
CIV
IN1
IN2
4
1
3
7
60
k
60
k
TFA9842BJ
STANDBY
V
9
5
MUTE
GND
CC
ON
V
REF
0.5V
CC
SHORT-CIRCUIT
TEMPERATURE
PROTECTION
V
CC
AND
2-channel auto amplifier (2
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8
2
OUT1
OUT2
001aaa448
100 nF
TFA9842BJ
470 F
470 F
1000 F
R
4
R
4
L
L
V
CC
10 of 17
SE)