TFA9842J/N1.112 NXP Semiconductors, TFA9842J/N1.112 Datasheet - Page 16

• Manufacturer Part Number: TFA9842J/N1.112
• Manufacturer: NXP Semiconductors

Specifications of TFA9842J/N1.112

• Operational Class: Class-AB
• Output Power (typ): 15x1@8Ohm/7.5x2@4OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.05@8Ohm@1W%
• Single Supply Voltage (typ): 17V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Power Dissipation: 35W
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 9V
• Single Supply Voltage (max): 26V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 9
• Lead Free Status / RoHS Status: Compliant

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.
16
2
20
3
TFA9842J
24
4
8
V CC (V)
MDB807
28
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