Want to connect your Sonos PLAY:1 to a pair of USB batteries? In this video I show where you will need to connect the 24 volts to including the used switching mode power supply (step up converter or so called boost converter that can be bought on ebay for few dollars). Hope you enjoy!
In this text below I note the used Embedded processor, the analog amplifier and the digital to analog converter (DAC) that is used in this Sonos PLAY:1.
**The amplifier that is integrated in this Sonos Play:1 is a Texas Instruments IC type: TPA3116 AVOL.
From the spec-sheet of the amplifier: The TPA3116 series are stereo efficient, digital amplifier power stage for driving speakers up to 100 W / 2 Ω in mono. The high efficiency of the TPA3130D2 allows it to do 2 × 15 W without external heat sink on a single layer PCB.
***[b]The digital to audio converter is again a IC from Texas Instruments. It is the IC type PCM5101a. According to the spec-sheet this is a: [b]
Monolithic CMOS integrated circuit that include a stereo digital-to-analog converter and additional support circuitry in a small TSSOP package. The PCM510xA uses the latest generation of TI’s advanced segment-DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter.
Using Directpath™ charge-pump technology, the PCM510xA provides 2.1 VRMS ground centered outputs, allowing designers to eliminate DC blocking capacitors on the output, as well as external muting circuits traditionally associated with single supply line drivers.
The integrated line driver surpasses all other charge-pump based line drivers by supporting loads down to 1 kΩ.
The integrated PLL on the device removes the requirement for a system clock (commonly known as master clock), allowing a 3-wire I2S connection and reducing system EMI.
Intelligent clock error and PowerSense under voltage protection utilizes a two level mute system for pop-free performance.
Compared with many conventional switched capacitor DAC architectures, the PCM510xA family offers up to 20 dB lower out-of-band noise, reducing EMI and aliasing in downstream amplifiers/ADCs. (from traditional 100 kHz OBN measurements all the way to 3 MHz)
***The embedded controller inside the Sonos PLAY:1 is a FreeScale MPC8314VRADDA . Below quick summary of this used processor:
The MPC8314E contains a core built on Power Architecture™
technology. It is a cost-effective, low-power, highly
integrated host processor that addresses the requirements of
several storage, consumer, and industrial applications,
including main CPUs and I/O processors in network attached
storage (NAS), voice over IP (VoIP) router/gateway,
intelligent wireless LAN (WLAN), set top boxes, industrial
controllers, and wireless access points. The MPC8314E
extends the PowerQUICC II Pro family, adding higher CPU
performance, new functionality, and faster interfaces while
addressing the requirements related to time-to-market, price,
power consumption, and package size.