Since the amp is a class d its very efficient over 90 efficient. As shown in the block diagram on page 2 the pam8302a has two internal amplifier stages.
Audio Synthesizer
Pam8302a wiring diagram. Pam8302a datasheet pam8302a pdf pam8302a data sheet pam8302a manual pam8302a pdf pam8302a datenblatt electronics pam8302a alldatasheet free datasheet. Inside the miniature chip is a class d controller able to run from 20v 55vdc. The first stages gain is externally con figurable while the second stages is internally fixed. Do you have a speaker connected. This one uses a 250 khz pwm output with an h bridge output driver to drive a small speaker. Solder the wire from gnd on the pam8302a to the top of capacitor cp4 as shown in the logic board diagram.
As shown in block diagram page 2 the pam8302a has two internal amplifier stages. Mount pam to enclosure fit the breakout over the spot near the powerboost 1000c and line up the holes. Get audio to the board. Secure the pcb and solder the red wire to vin pin and the blue wire to gnd. Pam8302 breakout board from adafruit. Class d amplifiers use pwm for power efficiency.
The closedloop gain of the first stage is set by selecting the ratio of r. The pam might require a speaker or similar load. The first stages gain is externally configurable while the second stages is internally fixed. Adafruit pam8302 mono amplifier pcb. Adafruit industries unique fun diy electronics and kits adafruit mono 25w class d audio amplifier pam8302 id. On the left side of the pam8302a board wire a to the top connection of sp1 the audio outputs.
The lm386 is a completely different chip and its not a class d amplifier. 2130 this super small mono amplifier is surprisingly powerful able to deliver up to 25 watts into 4 8 ohm impedance speakers. Click here to purchase one from the adafruit shop. Solder the wire from vin on the pam8302a to the positive point we prepped on the gba logic board. The pam8302 is a 25 w mono filter free class d audio power amplifier with a differential input. This super small mono amplifier is surprisingly powerful able to deliver up to 25 watts into 4 8 ohm impedance speakers.
Gallery of Pam8302a Wiring Diagram
