AB5362P Audio Stereo System Internal Circuit Details

#ExploreDetails_CircuitDetailsAB5362P Amplifier Board Circuit, 520S-AB5362P Board, JHQB14F2P IC Details, LTK5209 Amplifier IC, CS8391E Amplifier IC, B10K Variable Potentiometer Switch Working Explain And Details Are Here.

AB5362P Audio Stereo System Circuit Details

AB5362P Board Details

Board Number: AB5362P 
Board Full Number: 520S-AB5362P
Audio Type: Stereo

Power IC / Control IC / CPU / Audio Generator IC

IC Number: JHQB14F2P
Other Number: AB5362
Serial Number: UGS683
CPU Package Number: QFN32L
This IC acts as the central processing unit (CPU) and power management controller. It controls audio signals, manages power, and possibly handles the Bluetooth module.

QFN32L Package: This is a Quad Flat No-Lead (QFN) package with 32 pins. It allows for better heat dissipation, crucial in high-performance audio systems.
Stereo control: The IC likely handles stereo channel selection, balancing the left and right audio channels.
Power management: It ensures proper power distribution to different parts of the system, such as the audio amplifiers and charging circuits.


Audio Amplifier IC Details

Total Install IC Quantity:2 piece
Total Channel: 4 Channels
Audio amplifiers boost the low-power audio signals to levels that can drive the connected speakers. 4 audio output channels, meaning it can drive four speakers.

Audio Amplifier IC (LTK5209)

IC Number: LTK5209
IC Serial Number: K2112301
IC Total Pin Number: 10 Pin
This amplifier has a 10-pin configuration and likely controls one set of audio output channels. Since this board has four audio channels, the amplifier could handle two channels (left and right for stereo sound).
Amplification circuitry inside this IC boosts the signal strength from the audio generator and processes stereo sound before sending it to the speakers.
Given its low pin count, it might also include features like built-in gain control and short circuit protection.

Audio Amplifier IC (CS8391E)

IC Number: CS8391E
IC Serial Number: CC17
IC Total Pin Number: 16 Pin
This is the second amplifier IC, with 16 pins, suggesting it handles more complex amplification or additional features like class-D amplification (efficient power usage) or thermal protection.
With its additional pins, it might also handle higher current capacity or dual-channel stereo sound amplification for another pair of speakers.

Both of these amplifiers likely work in tandem to provide four-channel output, with each amplifier controlling two output channels.

Audio Connector Details

Total Install Audio Connector Quantity:2 piece
Type: Auxiliary (AUX)
Total Pin: 4 Pin (Connection Pin: 3 Pin)
These connectors are used for auxiliary input (AUX), allowing the board to receive audio from external sources, such as mobile devices or media players.

4-pin connector with 3 active pins:
One pin for ground.
Two pins for the left and right audio channels.
The fourth pin might be for additional signal grounding or shielding.


Charging IC (3KAF) Details

IC Number: 3KAF
Total Pin: 5 Pins
This IC controls the charging of LI-polymer batteries on the board. It keeps charging safe and prevents overcharging or overcurrent. The 5-pin setup means:

Power input pin for the external power source.
Charging control pins that watch and control the charging current.
Battery connection pins for managing the battery link.

Audio Output Speaker Details

Audio Output: 4-Slot Speaker System
Total Install Speaker Quantity: 4 Speakers
Single Speaker Power: 5W
Total Power: 20W
The board can power up to 20W of audio to the speakers. It's good for small to medium rooms. The four-channel design offers a surround sound or multi-directional audio experience.

Battery Details

Total Install Battery Slot Quantity: 2 (Parallel)
Battery Model: XD 481036
Battery Type: Rechargeable Li-Polymer Battery 

Single Battery Voltage: 4.2V Per Cell
Single Battery Capacity: 5Ah (Ampere-hour) per battery
After Parallel Connection Voltage: 4.2 Volt
After Parallel Connection Ampere: 10Ah  in parallel.
The system uses two rechargeable Li-Polymer batteries in parallel. Together, they have a 10Ah capacity. This setup keeps the voltage at 4.2V and doubles the current, extending battery life.

Li-Polymer batteries are picked for their high energy density, lightweight, and safety.
The board's power management system (likely the 3KAF Charging IC) handles charging and discharging. It ensures efficient and safe operation.

Capacitors Details

Total Install Polar Capacitor Quantity: 2 Polar Capacitors
Voltage: 10V
Capacitance: 470uF
These polar capacitors smooth and filter power in the circuit. They keep the power supply stable by removing voltage spikes or ripples. This ensures smooth power to sensitive parts like amplifiers and CPU.

LED Details

Charging Indicator LED (Red): This LED lights up when charging, showing the process.
Bluetooth On LED (Blue): This LED shows the Bluetooth module is on and ready to pair or transmit audio wirelessly.

Crystal IC Details

Frequency: 26.000 MHz
Crystal IC Type: SMD
Crystal IC Total Pin: 4 Pin
This crystal oscillator creates a precise clock signal for the CPU and Bluetooth system. The 26 MHz frequency is typical for Bluetooth. It helps maintain a stable wireless connection and efficiently processes audio signals.

Switch Or Potentiometer (B10K) Details

Switch Type: Thumbwheel Variable Resistor Type B
Switch Or Potentiometer Number:  B10K
Switch Or Potentiometer Value: 10K (10,000 ohms)
This is likely a thumbwheel potentiometer for power and volume control. The 10K resistance allows for adjusting the audio volume and powering the system on or off.


Point Name And Connection

BL+ = Lift Side Speaker Positive 
BL- = Lift Side Speaker Negative

BR+ = Right Side Speaker Positive
BR- = Right Side Speaker Negative

R+ = Right Side Speaker Positive
R- = Right Side Speaker Negative

L+ = Lift Side Speaker Positive
L- = Lift Side Speaker Negative

BAT- = Battery Negative Connection
BAT+ = Battery Positive Connection

Detailed Functionality

A. Audio Processing Flow

Input Sources:
Audio signals come in through the AUX connectors or the Bluetooth module.
 -The JHQB14F2P CPU then processes these signals and sends them to the audio amplifiers (LTK5209 and CS8391E).
Amplification: The audio amplifier ICs boost the low-power audio signals.
- Each amplifier handles stereo channels (left and right), sending the audio to the four speakers.

Output: The amplified signals go to the 4 speakers, creating a 20W stereo sound output.

B. Power Management

The 3KAF charging IC keeps a follow-up on the Li-Polymer batteries charging and discharging.
The polar capacitors help keep the power supply stable to the CPU and amplifiers, ensuring consistent voltage.

C. Bluetooth Functionality

The 26 MHz crystal oscillator gives the timing for the Bluetooth module, making wireless communication smooth.

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