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This version (18 Jan 2019 20:49) was approved by jobo23.The Previously approved version (18 Jan 2019 14:21) is available.Diff

A2B Class-D Amplifier Module for SHARC Audio Module

The SHARC Audio Module A2B Class-D Amplifier Module is an A2B connected board that contains two Class-D SSM3582 amplifier ICs, providing 4 channels of audio output.

The A2B Class-D Amplifier Module

Block Diagram of the A2B Class-D Amplifier Module

Schematics, PCB Layout, Bill of Materials

SHARC Audio Module A2B Class-D Amplifier Module Design and Integration Files

  • Bill of Materials (Coming Soon)
  • Fabrication and Assembly Files (Coming Soon)

Automotive Audio Bus (A2B) Interface Duraclick (P4, P5)

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 AD2425W IC.

SSM3582 Class-D Amplifier

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

1 Positive
2 Negative

P12 AMP1 Right Channel Output/MONO

1 Positive
2 Negative

P13 AMP2 Left Channel Output

1 Positive
2 Negative

P14 AMP2 Right Channel Output/MONO

1 Positive
2 Negative

Populate JP6 & JP7 to configure AMP1 into MONO Output on P12. Populate JP8 & JP9 to configure AMP2 into MONO Output on P14.

USBi Connector for SigmaStudio (P1)

The USBi Connector on the SHARC Audio Module allows for the use of the USBi adapter for SigmaStudio and bare metal programming.

+12v Input Power Jack (P3)

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.

Power Supply Input (P10)

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.

Pushbuttons (PB1, PB2)

Two GPIO pushbuttons are provided on the A2B Class-D Amplifier Module. They are connected as follows:

  • PB1 is connected to IO1 on AD2425W
  • PB2 is connected to IO2 on AD2425W

GPIO LEDs (LED1, LED2)

There are two GPIO-controlled LEDs on the A2B Class-D Amplifier Module. They are connected as follows:

  • LED1 is connected to IO0 on the AD2425W
  • LED2 is connected to IO7 on the AD2425W

PDM/TDM Connectors

JP5 PDM MIC

3.3v 12 GND
DRX0 34 GND
DRX1 56 GND
BLCK 78 GND

P2 Buffered TDM Signals

B_DTX0 1 2 GND
B_DTX1 3 4 GND
B_DRX0 5 6 GND
B_DRX1 7 8 GND
B_FSYNC 9 10 GND
B_BLCK 1112 GND

P15 Unbuffered TDM Signals

DTX0 12 GND
DTX1 34 GND
DRX0 56 GND
DRX1 78 GND
FSYNC 910 GND
BLCK 1112 GND

EEPROM

The A2B Class-D Amplifier Module has a TWI 256k EEPROM for configuration data. The EEPROM used is the 24FC256I/MS.


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resources/tools-software/sharc-audio-module/hardware/class-d.txt · Last modified: 18 Jan 2019 20:48 by jobo23