© 2024 EasyEDA Some rights reserved ISO/IEC
Editor Version
×
Standard
1.Easy to use and quick to get started
2.The process supports design scales of 300 devices or 1000 pads
3.Supports simple circuit simulation
4.For students, teachers, creators
Profession
1.Brand new interactions and interfaces
2.Smooth support for design sizes of over 5,000 devices or 10,000 pads
3.More rigorous design constraints, more standardized processes
4.For enterprises, more professional users
Ongoing
STD I2S 2CH Class D Amp with gain select
License: Public Domain
Mode: Editors' pick
- 0
Update time：
2021-09-13 10:20:57
Creation time：
2020-08-18 05:32:22
Description
This is a simple circuit that can be used to test I2S input to a small Class D amplifier.
The amplifier used is the Maxim Integrated MAX98357A (LRCLK Polarity = Low).
Outputs are filterless, however a Ferrite Bead Filter is included on the output to support longer speaker cable runs.
I've included a simple multipin header to allow experimenting with selecting different gain settings of the amplifier.
I've used a 3.3V voltage regulator to support SD_MODE selection using resistor values used on the MAX98357 Evaluation Board.
Pulling the SD_MODE pin of the MAX98357 to low shuts down the amplifiers.
Design Drawing
schematic diagram
（
1
/
）
PCB
（
1
/
）
The preview image was not generated, please save it again in the
editor.
| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | Header-Male-2.54_1x3 | P3 | HDR-3X1/2.54 | 1 |
| 2 | 0.1u | C3,C1 | C0603 | 2 |
| 3 | 10u | C2,C4 | C0603 | 2 |
| 4 | WJ15EDGVC-3.81-2P | P4 | WJ15EDGVC-3.81-2P | 1 |
| 5 | Gain Select Header | J2 | HDR-TH_6P-P2.54-V-R2-C3-S2.54 | 1 |
| 6 | 100K | R5,R6 | R0603 | 2 |
| 7 | WJ2EDGV-5.08-2P | P1,P2 | WJ2EDGV-5.08-2P | 2 |
| 8 | MAX98357A | IC1,IC2 | TQFN-16 | 2 |
| 9 | HDR-M-2.54_1x3 | J1 | HDR-M-2.54_1X3 | 1 |
| 10 | TLV76733-WSON-6 | U1 | WSON-6-2X2 | 1 |
| 11 | 499k | R2 | R0603 | 1 |
| 12 | 160k | R3 | R0603 | 1 |
| 13 | 2.2u | C6,C5 | C0805 | 2 |
| 14 | 2k | R4 | R0603 | 1 |
| 15 | 226k | R1 | R0603 | 1 |
| 16 | 330Ω | L2,L1,L3,L4 | L0603 | 4 |
| 17 | 680pF | C9,C7,C8,C10 | C0402 | 4 |
Unfold
Project Members
0
0
Collect to album
Related Projects
Change a batch
Loading...
Add to album
×
Loading...
reminder
×
Do you need to add this project to the album?