Odseven Stereo 3.7W Class D Audio Amplifier - MAX98306

Description

This incredibly small stereo amplifier is surprisingly powerful - able to deliver 2 x 3.7W channels into 3 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC. Since the amp is a class D, its incredibly efficient (over 90% efficient when driving an 8Ω speaker at over a Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but we could barely tell 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 360KHz 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 header to plug it into a breadboard, 3.5mm screw-terminal blocks so you can easily attach/detach your speakers, and a 2x4 header + jumper to change the amplifier gain on the fly. You will be ready to rock in 15 minutes! Speakers are not included, use any 3ohm or greater impedance speakers.

Output Power: 3.7W at 3Ω, 10% THD, 1.7W at 8Ω, 10% THD, with 5V Supply
Passes EMI limit unfiltered with up to 12 inches (30 cm) of speaker cable
High 83dB PSRR at 217Hz
Spread-Spectrum Modulation and Active Emissions Limiting
Five pin-selectable gains: 6dB, 9dB, 12dB, 15dB and 18dB. Select with a jumper or by setting the G and G' breakout pins (see schematic for breakout board showing gain pin settings for details)
Excellent click-and-pop suppression
Thermal and short-circuit/over-current protection
Low current draw: 2mA quiescent and 10uA in shutdown mode
Note: The terminal blocks included with your product may be blue or black.

TECHNICAL DETAILS

Dimensions (without 0.1" header):
Length:28.25mm/1.11in
Width:24.15mm/0.95in
Height:3.03mm/0.12in
Weight:2.33g

FAQ
Q1. Do you offer samples? is it free or extra?
A1: Yes.we could offer samples with free charge,However, buyer should responsible for shipping freight.

Q2: How to proceed an order?
A2: Firstly, let us know your requirements or application. Secondly, we quote according to your requirements or our suggestions. Thirdly, customer confirms the samples and pay deposit for the official order. Finally, we arrange the production and ship once it's ready.

Q3: Do you offer OEM service?
A3: Yes, Sure! Rich experience on printing logo on product and OEM package.

Q4: How many days I can get the goods after payment?
A4: Usually, goods will be shipped within 3 days. By DHL will take about 3~5 days. So total will take about 4~8 days to arrive at your hands.

Q5: Could I get your Photos about the product without the watermark to my website?
A5: Of course, we could do this for you.

Q6: What is your terms of payment ?
A6: For small amount orders, 100% better paid by PayPal or T/T in advance. For large amount orders like more than 10000 USD, 30% T/T in advance , balance fully paid before shipment.

Q7: How do you guarantee my goods right?
A7: Order will be arranged exactly as requested, Also we will take you photos if necessary before delivering out.