Product Description

A mini class D with AGC and I2C control? Yes please! This incredibly small stereo amplifier is surprisingly powerful. It is able to deliver 2 x 2.8W channels into 4 ohm impedance speakers (@ 10% THD) and it has a i2c control interface as well as an AGC (automatic gain control) system to keep your audio from clipping or distorting.

If you don't want to use I2C to control it, it does start up on with 6dB gain by default and the AGC set up for most music playing. We do suggest using it with a microcontroller to configure it, however, since its quite powerful. Settings are not stored in the chip, so you'll need to adjust any gain & AGC amplification settings every time the amp is powered up.

Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC. Since the amp is a class D, it's incredibly efficient (89% efficient when driving an 8Ω speaker at 1.5 Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but we could barely tell if it got hot. This board is a welcome upgrade to basic "LM386" amps!

The inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' - if you don't have differential outputs, simply tie the R- and L- to ground. The outputs are "Bridge Tied" - that means they connect directly to the outputs, no connection to ground. The output is a ~300KHz 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 with 1.0uF input capacitors. We also include 3.5mm screw-terminal blocks so you can easily attach/detach your speakers, and some header in case you want to plug it into a breadboard. Speakers are not included, use any 4 ohm or 8 ohm impedance speakers.

Feature

Output Power: 2.8W at 4Ω, 10% THD, 1.7W at 8Ω, 10% THD, with 5V Supply
PSRR: 80 dB, 5ms startup time
Designed for use without an output filter, when wires are kept at under 2"-4" long
I2C interface pins for setting gain, AGC configuration parameters, etc. See our tutorial for more details Selectable gain from -28dB to 30dB
Thermal shutdown protection
Brand : Adafruit
EAN : 0717520030393
Product Dimensions(LxWxH) : 8x6x3cm ; 18 g
Package Dimensions(LxWxH) : 9x7x1cm ; 18 g

Attention for order international goodsAll items are delivered from oversea(USA,KOREA,JAPAN,Malaysia)DirectlyDelivery would be done local shipping company in country of Production Place and Qxpress or POST in singaporeTotal shipping takes 7~14 working daysThe item from the third country could take 2 week more than normal delivery in transitNo exchange or Return is Allowed because of simple mind change Such Return or exchange is ly allowed for the reason below Major defect is discovered Wrong item is Delivered If you want to retunr or exchage at you cost, kindly Contact us via email Please check when you return the item just for changing your mind, you could be charge return cost (orginal + return shipping , duty, and etc) You should let us know within 7 days from the date you received the item if you'd like to get a refund for the item About Votage of electronics The voltage of most electronics goods listed on our shop is 110V Need transfomer to use US electronics We cannot accept return for dameged electronic item because of not using transfomer