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A<sup>2</sup>B类D放大器模块用户指南
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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 AD2428W 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.
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
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:
PB1is connected toIO1on AD2428WPB2is connected toIO2on AD2428W
GPIO LEDs (LED1, LED2)
There are two GPIO-controlled LEDs on the A2B Class-D Amplifier Module. They are connected as follows:
LED1is connected to IO0 on theAD2428WLED2is connected to IO7 on theAD2428W
PDM/TDM Connectors
JP5 PDM MIC
| 3.3v | 1 | 2 | GND |
| DRX0 | 3 | 4 | GND |
| DRX1 | 5 | 6 | GND |
| BLCK | 7 | 8 | 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 | 11 | 12 | GND |
P15 Unbuffered TDM Signals
| DTX0 | 1 | 2 | GND |
| DTX1 | 3 | 4 | GND |
| DRX0 | 5 | 6 | GND |
| DRX1 | 7 | 8 | GND |
| FSYNC | 9 | 10 | GND |
| BLCK | 11 | 12 | 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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