NCP2820 ON Semiconductor, NCP2820 Datasheet - Page 18

• Manufacturer Part Number: NCP2820
• Description: 2.65W Filterless Class-D Audio Power Amplifier
• Manufacturer: ON Semiconductor

PCB Layout Information
package it gives all the advantages of a Class−D audio
amplifier. The required application board is focused on low
cost solution too. Due to its fully differential capability, the
audio signal can only be provided by an input resistor. If a
low pass filtering function is required, then an input
coupling capacitor is needed. The values of these
components determine the voltage gain and the bandwidth
frequency. The battery positive supply voltage requires a
good decoupling capacitor versus the expected distortion.
at least 4 layers, a single 4.7 mF filtering ceramic capacitor
on the bottom face will give optimized performance.
NCP2820 is suitable for low cost solution. In a very small
When the board is using Ground and Power planes with
Figure 45. Silkscreen Layer of the UDFN8 Evaluation Board
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slightly degraded performances on the THD+N from 0.06%
up to 0.2%.
on the top layer, a single 4.7 mF decoupling capacitor will
optimize the THD+N level.
2.5 V until 5.5 V power supply. With less than 2% THD+N,
it delivers 500 mW rms output power to a 8.0 W load at
V
p
A 1.0 mF low ESR ceramic capacitor can also be used with
In a two layers application, if both V
The NCP2820 power audio amplifier can operate from
=3.0 V and 1.0 W rms output power at V
p
pins are connected
p
= 4.0 V.