TFA9841J NXP Semiconductors, TFA9841J Datasheet - Page 12

• Manufacturer Part Number: TFA9841J
• Description: Audio Amplifiers 1 X 7W SINGLE ENDED
• Manufacturer: NXP Semiconductors

Specifications of TFA9841J

• Product: Class-AB
• Output Power: 7.5 W
• Available Set Gain: 26 dB
• Thd Plus Noise: 0.1 %
• Operating Supply Voltage: 17 V
• Maximum Power Dissipation: 8000 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Audio Load Resistance: 4 Ohms
• Input Signal Type: Single
• Minimum Operating Temperature: - 40 C
• Output Signal Type: Single
• Supply Type: Single
• Supply Voltage (max): 26 V
• Supply Voltage (min): 9 V
• Output Type: 1-Channel Mono
• Package / Case: DBSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TFA9841J/N1,112

Philips Semiconductors
14. Test information
9397 750 12014
Preliminary data
14.1 Quality information
At V
see
For T
150
This calculation is for an application at worst-case 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.
Fig 13. Junction temperature as function of supply voltage for various loads.
P
R
R
P
R
R
th(tot)
th(h-a)
th(tot)
th(h-a)
CC
Figure
j(max)
External heatsink of 10 K/W; with music signals; T
R
R
60 = 90 C:
= 18 V and R
th(tot)
th(tot)
8.2.2). This allows for the use of a smaller heatsink:
= 90/4.4 = 20.5 K/W
= 90/2.2 = 40.9 K/W
= R
= R
= 150 C the temperature raise, caused by the power dissipation, is:
9.
= 90 C
= 90 C
th(tot)
th(tot)
Rev. 01 — 06 February 2004
R
R
L
th(j-mb)
th(j-mb)
= 4
( C)
150
100
T j
50
0
8
= 20.5
= 40.9
the measured worst-case sine-wave dissipation is 4.4 W;
R L = 1
12
4.0 = 16.5 K/W.
4.0 = 36.9 K/W.
2
16
amb
3
20
= 25 C.
1-channel audio amplifier (1 x SE)
24
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
4
8
V CC (V)
MDB800
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TFA9841J
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