The A2B Class-D Amplifier Module
Block Diagram of the A2B Class-D Amplifier Module
The A2B bus uses crossover cables to connect nodes to each other.
P4 connects to upstream towards the Master Node in the network and
P5 connects downstream to the next slave in the network.
The A2B Class-D Amplifier Module uses the AD2428W IC.
There are two ADI SSM3582 Class-D amplifiers on the A2B Class-D Amplifier Module. Each is two channels.
At 16V, the max power per channel is ~24w of power.
P11 AMP1 Left Channel Output
P12 AMP1 Right Channel Output/MONO
P13 AMP2 Left Channel Output
P14 AMP2 Right Channel Output/MONO
JP7 to configure AMP1 into MONO Output on
JP9 to configure AMP2 into MONO Output on
The A2B Class-D Amplifier Module is designed to run off a 12v to 16v supply. A 12v 2A DC power supply is included in the kit. The barrel connector on the A2B Class-D Amplifier Module can handle up to 3A current.
The Class-D Amplifier Module is shipped with a US power supply. Here is a universal option: https://www.digikey.com/products/en?keywords=102-3580-ND
P10 is a power supply input jack to connect up to 16v @ 8A MAX. There is an 8A fuse on the Positive input of the P10 connector.
Two GPIO pushbuttons are provided on the A2B Class-D Amplifier Module. They are connected as follows:
PB1is connected to
PB2is connected to
There are two GPIO-controlled LEDs on the A2B Class-D Amplifier Module. They are connected as follows:
LED1is connected to IO0 on the
LED2is connected to IO7 on the
JP5 PDM MIC
P2 Buffered TDM Signals
P15 Unbuffered TDM Signals