TFA9842J NXP Semiconductors, TFA9842J Datasheet - Page 16
TFA9842J
Manufacturer Part Number
TFA9842J
Description
Audio Amplifiers STEREO 2X6W SE MPA
Manufacturer
NXP Semiconductors
Datasheet
1.TFA9842JN1112.pdf
(21 pages)
Specifications of TFA9842J
Product
Class-AB
Output Power
15 W
Available Set Gain
26 dB
Thd Plus Noise
0.05 %
Operating Supply Voltage
17 V
Maximum Power Dissipation
35000 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Audio Load Resistance
8 Ohms
Input Signal Type
Single
Minimum Operating Temperature
- 40 C
Output Signal Type
Differential, Single
Supply Type
Single
Supply Voltage (max)
26 V
Supply Voltage (min)
9 V
Output Type
1-Channel Mono or 2-Channel Stereo
Package / Case
SOT-523
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
TFA9842J/N1,112
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Philips Semiconductors
14. Test information
9397 750 12013
Preliminary data
a.
Fig 15. Junction temperature as function of supply voltage for various loads.
External heatsink of 8 K/W; with music signals;
T
SE.
amb
( C)
150
T j
100
50
= 25 C.
0
8
R L = 2
12
14.1 Quality information
16
At V
is 8.4 W; see
For T
150
This calculation is for an application at worst-case (stereo) sine-wave output signals.
In practice music signals will be applied, which decreases the maximum power
dissipation to approximately half of the sine-wave power dissipation (see
Section
The General Quality Specification for Integrated Circuits, SNW-FQ-611 is applicable.
4
P
R
R
P
R
R
th(tot)
th(h-a)
th(tot)
th(h-a)
CC
20
j(max)
R
R
60 = 90 C:
6
= 18 V and R
th(tot)
th(tot)
8.2.2). This allows for the use of a smaller heatsink:
= 90/8.4 = 10.7 K/W
= 90/4.2 = 21.4 K/W
= R
= R
= 150 C the temperature raise, caused by the power dissipation, is:
24
= 90 C
= 90 C
th(tot)
th(tot)
16
8
Figure
V CC (V)
MDB808
Rev. 01 — 26 April 2004
28
R
R
L
9.
th(j-mb)
th(j-mb)
= 4
= 10.7
= 21.4
(2
b.
SE) the measured worst-case sine-wave dissipation
External heatsink of 8 K/W; with music signals;
T
BTL.
amb
2.0 = 8.7 K/W.
2.0 = 19.4 K/W.
( C)
2-channel audio amplifier (2 x SE or 1 x BTL)
150
100
T j
50
= 25 C.
0
8
R L = 1
12
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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2
20
3
TFA9842J
24
4
8
V CC (V)
MDB807
28
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