TDA8920C
NXP Semiconductors
2 × 110 W class-D power amplifier
The most effective way to avoid pumping effects is to connect the TDA8920C in a mono
full-bridge configuration. In the case of stereo single-ended applications, it is advised to
connect the inputs in anti-phase (see Section 8.4 on page 11). The power supply can also
be adapted; for example, by increasing the values of the supply line decoupling
capacitors.
13.7 Application schematic
Notes on the application schematic:
• Connect a solid ground plane around the switching amplifier to avoid emissions
• Place 100 nF capacitors as close as possible to the TDA8920C power supply pins
• Connect the heatsink to the ground plane or to VSSPn using a 100 nF capacitor
• Use a thermally conductive, electrically non-conductive, Sil-Pad between the
TDA8920C heat spreader and the external heatsink
• The heat spreader of the TDA8920C is internally connected to VSSD
• Use differential inputs for the most effective system level audio performance with
unbalanced signal sources. In case of hum due to floating inputs, connect the
shielding or source ground to the amplifier ground.
TDA8920C_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 11 June 2009
21 of 39
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