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TDA8922C_15 Datasheet, PDF (21/40 Pages) NXP Semiconductors – 2X75 W class-D power amplifier | |||
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NXP Semiconductors
TDA8922C
2 à 75 W class-D power ampliï¬er
The most effective way to avoid pumping effects is to connect the TDA8922C in a mono
full-bridge conï¬guration. 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 ampliï¬er to avoid emissions
⢠Place 100 nF capacitors as close as possible to the TDA8922C 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
TDA8922C heat spreader and the external heatsink
⢠The heat spreader of the TDA8922C 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 ï¬oating inputs, connect the
shielding or source ground to the ampliï¬er ground.
TDA8922C_1
Product data sheet
Rev. 01 â 7 September 2009
© NXP B.V. 2009. All rights reserved.
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