TFA9841J/N1,112 NXP Semiconductors, TFA9841J/N1,112 Datasheet - Page 11

• Manufacturer Part Number: TFA9841J/N1,112
• Description: IC AMP AUDIO PWR 7.5W MONO 9SIL
• Manufacturer: NXP Semiconductors
• Type: Class ABr

Specifications of TFA9841J/N1,112

• Package / Case: 9-SIL (Bent and Staggered Leads)
• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 7.5W x 1 @ 4 Ohm
• Voltage - Supply: 9 V ~ 26 V
• Features: Depop, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Product: General Purpose Audio Amplifiers
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-3451-5; 935274366112; TFA9841J

Philips Semiconductors
9397 750 12014
Preliminary data
13.1.2 Power supply decoupling
13.2 Thermal behavior and heatsink calculation
Proper supply bypassing is critical for low-noise performance and high supply voltage
ripple rejection. The respective capacitor location should be as close as possible to
the device and grounded to the power ground. Proper power supply decoupling also
prevents oscillations.
For suppressing higher frequency transients (spikes) on the supply line a capacitor
with low ESR, typical 100 nF, has to be placed as close as possible to the device. For
suppressing lower frequency noise and ripple signals, a large electrolytic capacitor,
e.g. 1000 F or greater, must be placed close to the device.
The bypass capacitor on pin SVR reduces the noise and ripple on the mid rail
voltage. For good THD and noise performance a low ESR capacitor is recommended.
The measured maximum thermal resistance of the IC package, R
A calculation for the heatsink can be made, with the following parameters:
R
the heatsink. This can be calculated using the maximum temperature increase
divided by the power dissipation:
Fig 12. Printed-circuit board layout (single-sided); components view.
th(tot)
T
V
T
R
amb(max)
j(max)
CC
th(tot)
= 18 V and R
is the total thermal resistance between the junction and the ambient including
= 150 C (specification)
= (T
= 60 C (example)
j(max)
Rev. 01 — 06 February 2004
CIV
22
L
T
F
CIV
amb(max)
= 4
SGND
220
nF
AUDIO POWER CS NIJMEGEN
)/P
D
IN2
P
F
TFA9843J
/
3
220
nF
0
TVA
0
IN1
2
100 nF
n .
J a
7
2
1000 F
1-channel audio amplifier (1 x SE)
+V P
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
k
10
150 F
MUTE
SB ON
10 k
MODE
TFA9841J
th(j-mb)
MCE506
, is 4.0 K/W.
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