TDA8947J/N3,112 NXP Semiconductors, TDA8947J/N3,112 Datasheet - Page 17

• Manufacturer Part Number: TDA8947J/N3,112
• Description: IC AMP AUDIO PWR 29W QUAD 17SIL
• Manufacturer: NXP Semiconductors
• Type: Class ABr

Specifications of TDA8947J/N3,112

• Output Type: 4-Channel (Quad)
• Package / Case: 17-SIL (Bent and Staggered Leads)
• Max Output Power X Channels @ Load: 29W x 2 @ 8 Ohm; 14W x 4 @ 4 Ohm
• Voltage - Supply: 9 V ~ 26 V
• Features: Depop, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Product: Class-AB
• Output Power: 29 W
• Available Set Gain: 32 dB
• Thd Plus Noise: 0.05 %
• Operating Supply Voltage: 18 V
• Maximum Power Dissipation: 69000 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-3458-5; 935274472112; TDA8947J

Philips Semiconductors
9397 750 14938
Product data sheet
Fig 14. Printed-circuit board layout (single-sided); components view
13.2.1 Layout and grounding
13.2.2 Power supply decoupling
13.2 Printed-circuit board
To obtain a high-level system performance, certain grounding techniques are essential.
The input reference grounds have to be tied with their respective source grounds and
must have separate tracks from the power ground tracks; this will prevent the large
(output) signal currents from interfering with the small AC input signals. The small-signal
ground tracks should be physically located as far as possible from the power ground
tracks. Supply and output tracks should be as wide as possible for delivering maximum
output power.
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.
4
4
220 nF
+V
4
p
IN2
220 nF
100 nF
1
P
Rev. 02 — 16 June 2005
F
IN1
/
3
0
0
2
TVA
4.7 nF
n .
J a
7
2
IN3
1
SVF
220
AUDIO POWER CS NIJMEGEN
F
IN4
CIV
22
F
VOL.Sgnd
220 nF
10 k
4
150
F
220 nF
220 nF
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
4
10 k
MODE1
SB ON
MUTE
4-channel audio amplifier
4
TDA8947J
OFF
ON
mce483
17 of 24