MIKROE-2477

2x5W AMP click PID: MIKROE-2477 2x5W AMP click functions as an amplifier and features the TDA7491LP 2x5-watt dual BTL class-D audio amplifier. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target MCU over the following pins on the mikroBUS™ line: AN, RST, CS, PWM, INT. 2x5W AMP click features a 3.5mm input jack and four output screw terminals for connecting passive speakers. Note: In order to achieve full 2x5W output power, keep in mind that you need to supply enough current to the chip. This is achievable with the EXT PWR header, but you need to switch over the AMP VCC to the left position. Note: a 3.5mm stereo cable and wired passive speakers are not included in the offer. Class‐D audio amplifier Class-D audio amplifiers (switching amplifiers) are very energy efficient. They reduce power losses on the output device by operating as an electronic switch, rather than as linear gain devices, like in A or AB amplifiers. These kinds of amplifiers are ideal for compact, high power applications. TDA7491LP audio amplifier The amplifier has three operating modes: Standby mode: all circuits are turned off, very low current consumption. The amplifier uses a maximum of 10uA in standby mode. Mute mode: inputs are connected to ground and the positive and negative PWM outputs are at 50% duty cycle. Play mode: the amplifiers are active. Simple control The click does not use a standard serial communication, like I2C or SPI - it's controlled by a few pins on the mikroBUS™ line. The state of these pins can either be HIGH or LOW (mute, gain, enable). The operating modes and gain are set with input pins. Key features      TDA7491LP audio amplifier   o Class‐D audio amplifier  o 2x5W output power   o Short‐circuit protection  o Thermal overload protection  o Standby and mute features  3.5mm audio jack  Screw terminals for speaker output  Interface: AN, RST, CS, PWM, INT  3.3V or 5V power supply  SPECIFICATION  Product Type Applications On-board modules Amplifier Mobile phones, portable sound systems, etc. TDA7491LP 2x5-watt dual BTL class-D audio amplifier 2x5W output power, short-circuit protection, thermal overload protection, 3.5mm audio jack, screw terminals for passive speakers. Interface AN, RST, CS, PWM, INT pins Power Supply 3.3V or 5V Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Key Features Pinout diagram This table shows how the pinout on 2x5W AMP click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes    Pin  Pin  Notes  mikroBUStm  Gain 0 pin  GN0  1 AN  PWM 16 MUTE Mute control  Gain 1 pin  GN1  2 RST  INT  15 DIA  Diagnostic pin Standby control  STB  3 CS  TX  14 NC  Not connected Not connected  NC  4 SCK  RX  13 NC  Not connected Not coneected  NC  5 MISO  SCL  12 NC  Not connected Not connected  NC  6 MOSI  SDA  11 NC  Not connected Power supply  +3.3V  7 3.3V  5V  10 +5V  Power supply  Ground  GND  8 GND  GND  9 GND Ground  Jumpers and settings Designator  Name  JP1  AMP  VCC  Default  Position  Right  Default  Option  5V  Description  AMP power supply, can be 5V or external (5V‐ 14V)  LEDs, buttons, connectors and switches Designator  Name  Type (LED, BUTTON...) EXT PWR  EXT PWR  Connector  Description  two pin non‐populated headerfor the external Amp supply Programming The library has two helper functions for setting the gain and the mode via output pins. Code snippet The demo shows how to initialize, set the mode and the gain of the click. 01 void main() 02 { 03 system_init(); 04 05 click_2x5W_gain(CLICK_2X5W_AMP_20_DB); 06 click_2x5W_mode(CLICK_2X5W_AMP_MODE_PLAY); 07 08 while( 1 ) 09 { 10 if(Button(&GPIOE_IDR, 11, 100, 1)) 11 { 12 click_2x5W_gain((click_2x5w_amp_gain_t)(++gain % 4)); 13 } 14 } 15 } https://shop.mikroe.com/click/audio-and-voice/2x5w-amp 2/24/2017