SI270X-A-EVB Silicon Laboratories Inc, SI270X-A-EVB Datasheet - Page 18

• Manufacturer Part Number: SI270X-A-EVB
• Description: BOARD EVAL FOR SI270X-A
• Manufacturer: Silicon Laboratories Inc

Specifications of SI270X-A-EVB

• Board Type: Fully Populated
• Amplifier Type: Class D
• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 5W x 2 @ 3 Ohm
• Voltage - Supply: 9V
• Utilized Ic / Part: SI270X-A
• Description/function: Audio Amplifiers
• Output Power: 5 W
• Product: Audio Modules
• For Use With/related Products: Si270x
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1929

Si2704/05/06/07-A10
Figure 11. PWM CM Spectrum for Integer Mode PWM
Figure 12. PWM CM Spectrum for Fractional Mode PWM
4.1.2.3. Spectral Spreading
Spread mode PWM can be used to spread PWM common mode switching energy resulting in a peak energy
suppression greater than 20 dB at all frequencies. This Spectral Shaping feature is useful for mitigating EMI
radiation and eliminating inductors for filter-less applications. Spread Mode PWM can be programmed dynamically
by setting property PWM_CONFIG during normal operation without adversely affecting the internal audio
processing or the differential output signal integrity.
4.1.2.4. Spectral Shaping Noise-Free Notch for AM Radio (Si2705/07 only)
When using Spread Mode PWM with full rate PWM switching (960 kHz), a tunable noise-free notch can be
programmed via 2-Wire control to shape the switching noise and create a narrow frequency band in the AM radio
spectrum in which the PWM common mode switching energy is not allowed to spread. This noise-free notch is
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