SLAU628 August 2020 DRV5825P
The DRV5825P showcases the latest TI digital input Class-D closed-loop amplifier for Piezo applications. The DRV5825P is a digital input Class-D audio amplifier with Smart Piezo Driver Algorithm.
The EVM has the following features:
The DRV5825PEVM has several audio source options. The digital audio data input is selectable from USB audio, optical S/PDIF, and PSIA (external I2S). There is also an analog audio input to the DRV5825PEVM through 3-mm audio jack. The DRV5825PEVM also functions as an optical output source (labeled on the board as OPTO OUT U6) as Figure 1-1 shows. The output of the DRV5825PEVM can either be configured in BTL or PBTL through the load connections to OUT1 (J12), OUT2 (J15), OUT3 (J18), and OUT4 (J21) shown in Figure 1-1.
The DRV5825PEVM has four different optional audio sources:
Both 3.3 V and 1.8 V DVDD and IOVDD are supported with the DRV5825PEVM. Jumper (J10) can be used to select accordingly based on the requirement of the digital signals to closely mimic the end equipment of the customer as Figure 1-1 (board view) or Figure 3-3 (schematic view) show. PVDD and DVDD of each device may be removed with the corresponding jumpers in Table 1-1:
|U18 (Top - OUT1 and OUT2)||J11||DVDD2 (J14)|
|U21 (Bottom OUT3 and OUT4)||J17||DVDD1 (J21)|
The USB connection is also used to provide I2C communications with DRV5825P on the EVM. The EVM provides selection of providing external I2C is the use of the GUI/XMOS is not desired through SDA (J2) and SCL (J1) as seen in Figure 1-1 (board view) or Figure 3-1 (schematic view). The PPC3™ application for this device is used to initialize and operate this EVM.