PAM8010

Document number: DSxxxxx Rev. 1 - 0

14 of 17

www.diodes.com

November 2012

© Diodes Incorporated

PAM8010

A Product Line of

Diodes Incorporated

PCB Layout Guidelines Grounding

At this stage it is paramount to notice the necessity of separate grounds. Noise currents in the output power stage need to be returned to output

noise ground and nowhere else. Were these currents to circulate elsewhere, they may get into the power supply, the signal ground, etc, worse

yet, they may form a loop and radiate noise. Any of these cases results in degraded amplifier performance. The logical returns for the output

noise currents associated with Class-D switching are the respective PGND pins for each channel. The switch state diagram illustrates that

PGND is instrumental in nearly every switch state. This is the perfect point to which the output noise ground trace should return. Also note that

output noise ground is channel specific. A two channel amplifier has two seperate channels and consequently must have two seperate output

noise ground traces. The layout of the PAM8010 offers separate PGND connections for each channel and in some cases each side of the

bridge. Output noise grounds must be tied to system ground at the power in exclusively. Signal currents for the inputs, reference, etc need to be

returned to quite ground. This ground is only tied to the signal components and the GND pin, and GND then tied to system ground.

Ordering Information

Part Number

Package Type

Standard Package

PAM8010NHR

SSOP-24

2500 Units/Tape&Reel

PAM8010DHR

SOP-24

1000 Units/Tape&Reel

Marking Information