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TFA9842AJ/N1,112

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
1. General description
The TFA9842AJ contains two identical audio power amplifiers. The TFA9842AJ can be
used as two Single-Ended (SE) channels with a volume control. The maximum gain is
26 dB.
The TFA9842AJ comes in a 9-pin DIL-bent-SIL (DBS9P) power package. The TFA9842AJ
is pin compatible with the TFA9843AJ, TFA9843(B)J, TFA9842(B)J and TFA9841J. The
difference between the TFA9843AJ and the TFA9843(B)J, TFA9842(B)J, TFA9841J is the
functionality of pin 7. The TFA9843AJ has a Volume Control (VC) on pin 7. The
TFA9843(B)J, TFA9842(B)J and TFA9841J have a mode select (MODE) on pin 7.
The TFA9842AJ contains a unique protection circuit that is solely based on multiple
temperature measurements inside the chip. This gives maximum output power for all
supply voltages and load conditions with no unnecessary audio holes. Almost any supply
voltage and load impedance combination can be made as long as thermal boundary
conditions (number of channels used, external heatsink and ambient temperature) allow
it.
2. Features
n 2 channel SE: 1 W to 7.5 W operation possibility
n Soft clipping
n Input clamps
n Volume control
n Standby and Mute mode
n No on or off switching plops
n Low standby current
n High supply voltage ripple rejection
n Outputs short-circuit protected to ground, supply and across the load
n Thermally protected
n Pin compatible with the TFA9843AJ, TFA9843(B)J, TFA9842(B)J and TFA9841J
3. Applications
n CRT TV and LCD TV
n Monitors
n PC speakers
n Boom box
n Mini and micro audio receivers
TFA9842AJ
7.5 W stereo power amplifier with volume control
Rev. 01 — 28 April 2006 Preliminary specification
TFA9842AJ_1 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary specification Rev. 01 — 28 April 2006 2 of 18
Philips Semiconductors
TFA9842AJ
7.5 W stereo power amplifier with volume control
4. Quick reference data
[1] A minimum load of 3 Ω is allowed at supply voltages > 22 V.
[2] Supply voltage ripple rejection is measured at the output, with a source impedance Z
S
=0Ω at the input
and with a frequency range from 20 Hz to 22 kHz (unweighted). The ripple voltage is a sine wave with a
frequency f
ripple
and an amplitude of 300 mV (RMS), which is applied to the positive supply rail.
5. Ordering information
Table 1. Quick reference data
Symbol Parameter Conditions Min Typ Max Unit
V
CC
supply voltage operating
[1]
9 1728V
I
q
quiescent current V
CC
=17V;
R
L
= ∞Ω
- 60 100 mA
I
CC(stb)
standby supply current V
CC
=17V;
V
I(VC)
< 0.8 V
- - 150 µA
P
o
output power THD = 10 %;
R
L
=4Ω;
V
CC
=17V
7 7.5 - W
THD total harmonic distortion P
o
= 1 W - 0.1 0.5 %
G
v(max)
maximum voltage gain V
I(VC)
> 5.0 V 25 26 27 dB
∆G
v
voltage gain range 1.5 V < V
I(VC)
<
5.0 V
-80-dB
SVRR supply voltage ripple
rejection
f
ripple
= 1 kHz
[2]
-60-dB
Table 2. Ordering information
Type number Package
Name Description Version
TFA9842AJ DBS9P plastic DIL-bent-SIL power package; 9 leads (lead
length 12/11 mm); exposed die pad
SOT523 -1
TFA9842AJ_1 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary specification Rev. 01 — 28 April 2006 3 of 18
Philips Semiconductors
TFA9842AJ
7.5 W stereo power amplifier with volume control
6. Block diagram
7. Pinning information
7.1 Pinning
Fig 1. Block diagram
001aae064
VOLUME
CONTROL
SHORT-CIRCUIT
AND
TEMPERATURE
PROTECTION
V
REF
0.5V
CC
V
CC
V
CC
9
4
IN1
IN2
OUT1
OUT2
SVR
CIV
VC
1
3
7
8
2
6
5
GND
TFA9842AJ
60
kΩ
60
kΩ
Fig 2. Pin configuration
TFA9842AJ
OUT2
CIV
IN1
GND
SVR
VC
OUT1
001aae063
IN2
V
CC
2
1
3
4
5
6
7
8
9
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

TFA9842AJ/N1,112

Mfr. #:
Buy TFA9842AJ/N1,112
Manufacturer:
NXP Semiconductors
Description:
IC AMP AUDIO PWR 7.5W STER 9SIL
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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