TF Card MP3 Decoder Board Decoding Module 3.7V 5V Power Supply with 2W Hybrid Mono with Memory Playback

TF Card MP3 Decoder Board Decoding Module 3.7-5V Power Supply with 2W Hybrid Mono

 

 

(Description in Chinese and English for Details)

 

Description in Chinese:

 

 

TF Card MP3 Decoder Board, without TF Card, Supports Playing MP3 Music Files. Currently, 16G TF Card Is Supported. No Matter How Big It Is, It Has Not Been Tested Yet.

3.7 Lithium Battery Or USB 5V Can Supply Power,

In the Upper-Right Corner of the Board, the Three Groups of White Boxes Touch Button Lightly, the Middle Group Is the Play Pause Button, the Upper and Lower Groups Press the Upper and Lower Buttons, and the Upper and Lower Groups Press the Volume-Adjustment.

It Is Recommended to Use USB 5V Power Supply to Change USB Flash Disk Playback, Because Some Old USB Flash Disks Are Powered by 5V and Do Not Support 3.7V Voltage of Lithium Battery, So When Lithium Battery Is Powered, USB Flash Disk Cannot Be Played, the New USB Flash Drive Can Be Played Normally as Long as It Supports 3.7V Power Supply.

with 2W Monobloc, the Maximum Output of the Amplifier Is 3W When the Power Supply Is 5V (It Is Recommended to Match the Mini Card Speaker on the 4 Euro 3W Small Horn, the Sound Quality Is Good, the Sound Is Very Loud, If You Think the Volume Is Not Enough, please Change the 4 Euro 5 Watt Speaker Directly, the Sound Is Too Loud to Scare You. After Changing the 4 Euro 5W Speaker, Pay Attention to the Heat Dissipation of the Power Amplifier Chip, It Is Better to Add Cooling Fin)

Some Customers Report That the Power Amplifier Will Generate Heat When Playing Music. It Is Normal for the Power Amplifier Chip Or Power Amplifier Tube to Generate Heat. as Long as the Power Amplifier Is Not Turned to High Volume, the Output End of the Short Circuit Speaker (Resistance 0 Ohm) it Will Not Burn the Power Amplifier Chip, So You Can Use It with Confidence.

If a Customer Needs to Go Back and Make This Board as the Front Stage of the Power Amplifier, He Does Not Need the Power Amplifier of This Board. If He Goes Back and Connects the Power Amplifier Himself, He Can Modify It as Follows, remove the Power Amplifier Chip (8-Pin Chip) of the Board, and Then Remove It from the 4th-Pin and 6th-Pin of the Main Control (These Two Feet Are the Left and Right Channel Output of the Main Control Chip), A 104 (Or 224) Capacitor Can Be Connected in Series to Remove the Input Terminal of the Power Amplifier (the Capacitor Acts as an Isolation Function to Prevent the Power Supply of the Same Power Supply from Burning the Front-Level Main Control Chip Or the Power Amplifier of the Later Stage), the Remaining Line Is Connected to the Public Terminal of the Amplifier Input from the Negative Pole.

Some Customers Need to Go Back and Listen to the Music of This Board for Modification Headphones, and Remove the Power Amplifier Chip (8-Leg Chip) of the Board, then, from 4th Feet and 6th Feet of the Main Control (These Two Feet Are the Left and Right Channel Output of the Main Control Chip), a 104 (Or 224) Capacitor Is Connected in Series to Remove the Left and Right Channel of the Earphone, the Remaining Wire Is Connected to the Common End of the Earphone from the Negative Pole.

Power-on Automatic Playback

Loop Play with Memory Function, Continue to Play from the Last Played Track after the next Power-on

Play. Display with LED Indicator

PCB Board Size 34. 23mm (Left and Right Distance) * 22. 33mm (up and down Distance) * 1mm (Thickness)

Maximum Size of Appearance 37. 09mm (Maximum Distance between Left and Right) * 22. 33mm (Maximum Distance between up and down) * 2.97mm (Maximum Thickness)

A 3.7v600ma Lithium Battery (043545), after Sufficient Power, the Maximum Volume Can Be Used for about 3.5 One Hours, Which Is Very Power-Saving

Main Control Chip Introduction
1. Overview
Gpd2846a Is a Chip Designed for MP3 Players with FM Radio Function and Linein Function.
2. Main Features
MP3 Playback Format Is Supported.
You Can Play T Card/SD Card, U Disk, FM, and External Audio Source (Linein). Rear Pocket Can Be Played First Or Switched by Mode Key.
Automatically Detects Whether the Headset Is Inserted, and Then Directly Switches the External Power Amplifier from the IO Port (Mute) without External Triode.
Support Volume Size, Number of Songs,... Stored in T Card/SD Card, U Disk, Users Can Save the Programmable Memory
It Can Automatically Detect Whether the External Eeprod Is Used to Determine Whether It Is Stored in the Eeprod Or T Card/SD Card Or U Disk.
Use One Ad-Key Port to Implement Various Button Combinations.
There Are Two Groups of Ad-Key Keyboards to Choose from.
Support 3 FM Radio Chips: Rda5807, Bk1080 and Rtc6207e.
Infrared Remote Control Is Not Supported.
USB Device Mode Is Not Supported.
Supports USB Audio Mode.
Package Type: Sop16 Package.
3. Product Application
MP3 Player with FM Radio Function and Mini Speaker without Screen.
 
4. Pin Connections
Pin # Pin Name Description
1 V33reg Dvdd33 Digital Power Supply 3.3V.
2 V50reg Vmcu/Bat Lithium Battery Input, 3.3V ~ 5V.
3 Vssreg DVSs Digital Signal Grounding.
4 Dacol Dacl Left Channel Audio Signal Output.
5 VCOM Vref Audio Signal Center Point, Please Plug-in 1UF Capacitor Voltage Regulator.
6 Dacor Dacr Right Channel Audio Signal Output.
The Left and Right Input of 7 Linein_r Lineinr L Linein.
8 Ioa4 Ad-Key Button.
9 Ioa3 Fmclk If Ioa3 Has a Pull-down Resistor to the Ground, Ioa3 Will Output the Clock Signal to the outside
Hanging FM Radio IC. If Ioa3 Is Suspended, Fm Radio Ic Must
You Must Connect 32768Hz Crystal Oscillator Yourself.
10 Ioa2 Mute: Mute the External Power Amplifier.
11 DM DM USB的DM。
12 DP DP USB的DP。
13 Ioa0 IO-key/LED (1) Plug-in Led Light: Output "1" Means to Light up the Led.
(2) It Is Also IO-key1.
(3) Function Options Are Also Used to Define Button Modes.
14 IOB1 SD_CLK
SD_DET
Sd_clk: Clock Output of T Card/SD Card.
Sd_det: Detects Whether the SD Card Is Inserted. Reading "0" Indicates Insertion.
Please Connect a 3.3 Kohm Resistor to the Ground.
15 IOB0 SD_CMD
I2C_CLK
Sd_cmd: Command and Response of T Card/Sd Card.
I2c_clk: The Clock of the I2C; the External EEPROMs and FM.
16 IOB2 SD_DAT
I2C_DAT
SD_DAT：T卡/SD卡的data input/output。
I2c_dat: the Data of the I2c-data; External Eeproms and Fm.
GPD2846
 
 
5. Ad-Key Button Operation Function
(5-1) Ad-Key Has a Total of Eight One Button from S1 to S8, of Which Four Button from S1 to S4 Are in Mp3 Mode (That Is, Playing Usb Flash Disk and
The Behavior of Playing SD Card/T Card Is Determined by Whether the Ioa0/Led Pin Has a Plug-in Pull-up Resistor.
Pull up to V33reg through 22kohm Resistor.
We Call Ioa0/Led Not Rooption Button Mode 1 and Button Mode 2 」.
(5-2) Button Definitions:
[Prev ]: Previous, Play the Previous MP3.
[next]:Next, Play the next MP3.
[P/P ]:Play/Pause, Switching between Playback and Pause.
[V ]:Volume, plus-Sized Volume.
[V ]:Volume, Long Press Will Continue to plus-Sized Volume until Button Is Released.
[V- ]:Volume-, Reduce the Volume.
[V -- ]:Volume --, Long Press Will Continue to Reduce the Volume until Button Is Released.
[Scan ]:Scan All FM-band, Automatically Search 87.5mhz to 108.0mhz Again, and Automatically Search the Radio Channel with Signal
Store It. You Can Store up to 50 Units.
[Scan ]: Search for Stations at 108Mhz, Search for the Nearest Effective Radio Station from the Current Channel to 108Mhz, and Then Stop to Play
The Station.
[Scan- ]: Search for Stations at 87.5MHz, Search for the Nearest Effective Radio Station from the Current Channel to 87.5MHz, and Then Stop to Play
The Station.
[Ch]: Jumps to the next (Frequency) Stored FM Airplay.
[CH- ]: Jumps to the Previous One (Frequency-) Stored FM Airplay.
[RW ]:Rewind,MP3 Rewind.
[Ff]:Fast Forward,MP3 Fast Forward.
[Mode ]: Mode Switching "Sequence Is Sd Card/T Card U Disk Fm Line in; Cycle Switching.
If You Switch to the Corresponding Mode with the Mode Key, the Playback Media in the Corresponding Mode Must Exist, Otherwise It Will Automatically Jump to the next Mode.
Type. For Example, If You Switch to Line in Mode with the Mode Key, You Must Insert the Line in before It Works. If You Find and
When Not Inserted, It Is Automatically Switched to the next Mode.
[Repeat ]: Switch between Two Loop Modes, All (Full Loop)? Single (Single Loop).
[Eq]: Normal Classic Bass Live Rock

 

 

Description in English:

 

 

Features: 

Working Voltage: 3.7V Lithium Battery 600MA or 5V USB Power Supply 
Chip:GPD2846A 
Chip Footprint:SOP16 
PCB size: 34.23mm * 22.33mm * 1mm
with 2W Mixed mono 
With Power supply ,it can play Automaticly 
With LED indicator 
Supports MP3 format playback 
Supports USB audio mode
Supports 3 types FM radio chip : RDA5807, BK1080 and RTC6207E. 
Does not support infrared remote control. 
Does not support USB device mode

 

 

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