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ADAFRUIT MONO 2.5W CLASS D AUDIO AMPLIFIER - PAM8302, ADAFRUIT 2130

  • Zaloga GALAGO: DA, 2 kos/ov
    Zaloga DOBAVITELJ: DA, 1374 kos/ov
  • Dobava 7 dni
  • Znamka: ADAFRUIT
  • Id številka: 758/57
5,37 €

DESCRIPTION

 

This super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC. Since the amp is a class D, its very efficient (over 90% efficient when driving an 8Ω speaker at over half a Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but adafruit could barely tell it got hot. There's even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain. This board is a welcome upgrade to basic "LM386" amps!

 

The A+ and A- inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' - if you don't have differential outputs, simply tie the Audio- pin  to ground. The output is "Bridge Tied" - that means the output pins connect directly to the speaker pins, no connection to ground. The output is a high frequency 250KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly.

 

Comes with a fully assembled and tested breakout board. Adafruit also include header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach/detach your speaker. You will be ready to rock in 15 minutes! Speaker is not included, use any 4 ohm or greater impedance speaker.

 

- Output Power: 2.5W at 4Ω, 10% THD, 1.5W at 8Ω, 10% THD, with 5.5V Supply

- 50dB PSRR at 1KHz

- Filterless design, with ferrite bead + capacitors on output.

- Fixed 24dB gain, onboard trim potentiometer for adjusting input volume.

- Thermal and short-circuit/over-current protection

- Low current draw: 4mA quiescent and 1uA in shutdown mode

 

 

TECHNICAL DETAILS

 

PAM8302A datasheet

 

Dimensions (without 0.1" header):

- 15mm x 24mm x 2mm 

- Weight: 1.4g

 

Specifikacije

Glavno

Processor
Broadcom BCM2837B0, Cortex-A53 64-bit SoC @ 1.4 GHz
Memory
512MB LPDDR2 SDRAM
Connectivity
2.4 GHz and 5 GHz IEE 802.11.b/g/n/ac wireless LAN, Bluetooth 4.2/BLE
Access
Extended 40-pin GPIO header
Video & sound:
1 × full size HDMI

Dimenzije

Dolžina
99 mm
Širina
207 mm
Višina
208 mm
Opozorilo! Vsebina lahko vsebuje napake.