boAt Stone 1000 Circuit Details

Basic Information

Model Name: boAt Stone
Model Number: boAt Stone 1000
Watt: 14 - 20 Watt
Bluetooth version: V2
Charging port: Micro USB
Total IC Quantity: 4
MotherBoard (PCB) Number: BK_M33_BT_v2

boAt Stone 1000 Circuit Details

Component Name List

1. Bluetooth Kit.
2. Audio Female Jack(Auxiliary Type)
3. 4 push switch 
4. Audio Amplifier IC ( Dual IC )
5. Charging IC
6. Headphone Driver IC
7. Transistor
8. Battery


Component Details

Bluetooth Kit : 
Model number: ZT-4390E5
Others Number: c5bf
Bluetooth Frequency: 26 Mhz
Working Principle:
The ZT-4390E5 is equipped to receive a wireless audio signal from a Bluetooth-enabled device. It has been designed to work at a frequency of 26 MHz. The digital signals received are converted to analogue signals and then further sent to the audio amplifier for the amplification process.
The four push switches are used for controlling the Bluetooth module functions such as power ON/OFF, Pairing, Mode change and Volume control.


Audio Amplifier Single IC

IC Number: ft2920P
IC Others Number: 200512
IC Total Pin: 24
IC Watt: 8
IC Efficiency: 82%
IC Class: G Boost
The audio amplifier IC is responsible for driving the speaker’s output and making sure that the audio signals that are received from the Bluetooth module or AUX input are amplified enough to be audible. The boAt Stone 1000 uses ft2920P as its main amplifier IC.


Working Principle:
The ft2920P is a Class G amplifier IC, which utilises a multi-level power supply to switch between different voltage rails depending on the amplitude of the audio signal. This translates to higher efficiency and effective power management, whilst achieving louder sound output with low heat dissipation.
The analogue signals from the Bluetooth module or AUX input are amplified by IC and these further amplified signals drive the built-in speaker. Since the efficiency of ft2920P (82%) is high, most of the input power is utilized for amplification purposes and less energy is dissipated as heat.

Push Button

The boAt Stone 1000 consists of four push switches which act as the control panel for the speaker. Each switch is allocated with a specific function:
Power On/Off: Turns the speaker on or off.
Volume +: Increases the volume.
Volume -: Decreases the volume.
Mode/MP3 Next: Switch to Bluetooth, AUX and other modes; skip to the next song.

Headphone Driver IC

IC Number: PT2308 - S
IC Others Number: 1DE4A8
IC Total Pin: 8 Pin
Working Principle:
The PT2308-S is responsible for driving audio signals to the headphone jack. When headphones are plugged in, this IC receives the same audio signals as the main amplifier IC (ft2920P), but instead of amplifying the signal to drive large speakers, it adjusts the signal for headphones, which require less power.


Audio Female Jack (Auxiliary Input)

This type of input grants the ability to connect to a speaker via a 3.5mm jack and is not dependent on Bluetooth technology. This is a substitution for Bluetooth which provides wired audio input.


Function:
If you connect a device using the AUX input, the Bluetooth module will be overridden and the audio signal will get through to the amplifier directly for output through the speakers. It provides a clearer signal path for devices that do not support Bluetooth or for those customers who prefer wired connections.


Charging IC

IC Number: 4056A
IC Others Number: 0rB20H
IC Total Pin: 8 Pin
A charging IC (4056A, for example) is a vital part of the circuit that takes care of the charging of the internal battery making sure that it gets charged properly and also safeguards the circuit from overcharging as well as helps in maintaining a temperature by regulating voltage and current.
Working Principle:
The 4056A IC regulates the 5V charging input from the micro USB charging port to the required charging voltage for the internal battery, it monitors the charging voltage and current, guaranteeing the battery is safely charged without exceeding its limits.


Transistor

Transistor Number: J3Y 
Transistor Number: A119V 
Pin : 3
The two transistors, J3Y and A119V, are crucial for signal amplification and switching functions in the circuit.
Transistor J3Y: A general-purpose NPN transistor used for small-signal amplification.
Transistor A119V: Likely used for power switching or in the audio amplification section.

Working Principle:
Transistors in audio circuits like these are typically used to switch signals or as part of a class AB amplifier design. In this case, they might work in conjunction with the audio amplifier IC to handle the power requirements of the speaker.

Battery

Battery Voltage: 4-7Voltage
Battery Ampere: 5v (300mAh)
Battery Charging Voltage: 5V 
Battery Charging Ampere: 6 Ampere
Battery BuckUp: 8 Hours
The battery is the power source for the boAt Stone 1000. It provides the necessary voltage and current for the speaker to function wirelessly.
Working Principle:
The battery provides power to the Bluetooth module, audio amplifier, and other components. The charging IC ensures that the battery charges correctly when plugged into a 5V power source. The speaker has an 8-hour battery backup, allowing for extended playback times.
EarBuds Charging Time Glow LED Colour: Red
Charging Time Load Ampere: 0.40A
Charging Time Load Voltage: 4.3 Volt


What role does the AUX input play in the amplifier?

The AUX input allows wired audio signals to bypass the Bluetooth module and go directly to the amplifier for output through the speaker.

How does the ft2920P handle loud audio signals?

The ft2920P uses its multi-level power supply to adapt to louder signals, ensuring efficient amplification with minimal heat production.

What other number is associated with the ft2920P IC?

The other number associated with the ft2920P is 200512.

What kind of speakers is the ft2920P designed to drive?

The ft2920P is designed to drive built-in speakers in devices like Bluetooth speakers, with power output sufficient for small to medium-sized speakers.

Can the ft2920P IC handle both Bluetooth and wired (AUX) inputs?

Yes, the ft2920P IC can handle both Bluetooth and AUX inputs for amplification.

What is the purpose of the push switches for the audio amplifier?

The push switches control functions like power on/off, volume control, and mode switching (Bluetooth/AUX), which affect the audio signals processed by the amplifier.

What is the total number of pins on the ft2920P IC?

The ft2920P IC has 24 pins.

What is the maximum wattage rating of the ft2920P amplifier IC in the boAt Stone 1000?

The ft2920P has a maximum wattage rating of 8 watts.

How does the boAt Stone 1000 ensure minimal heat dissipation from the audio amplifier?

The boAt Stone 1000 ensures minimal heat dissipation by using a Class G amplifier (ft2920P), which efficiently manages the power supply and reduces unnecessary heat generation.

How does the battery affect the audio amplifier's performance in the boAt Stone 1000?

The battery provides power to the audio amplifier, and the charging IC ensures it is properly charged to maintain consistent audio performance during wireless operation. The battery backup allows the speaker to function for up to 8 hours without recharging.



Extra Information:
LED Indicators:
Red LED: Lights up during charging.
Blue, Red, and Green LEDs: Indicate different operational states, such as power on, Bluetooth pairing, and audio playing modes.
Switch Mechanism:
4 Pis (On/Off /Volume +/Mp3 Next/Volume - / Mode.
The push switches control different modes and functions. They are connected directly to the control circuit, allowing users to power the speaker on and off, adjust the volume, and switch between input modes (Bluetooth, AUX, etc.).

FAQs

What is the main audio amplifier IC used in the boAt Stone 1000?

The main audio amplifier IC is ft2920P.

What is the power output of the ft2920P audio amplifier IC?

The power output is 8 watts.

What class of amplifier does the ft2920P belong to?

The ft2920P is a Class G amplifier.

How many channels does the boAt Stone 1000 amplifier support?

The boAt Stone 1000 amplifier is a 2-channel amplifier.

What is the efficiency of the ft2920P amplifier IC?

The efficiency of the ft2920P amplifier IC is 82%.

How does the ft2920P manage power for improved efficiency?

The ft2920P uses a multi-level power supply to switch between different voltage rails, depending on the audio signal's amplitude, which enhances efficiency and reduces heat dissipation.

What type of signals does the ft2920P IC amplify?

The ft2920P amplifies analogue audio signals received from either the Bluetooth module or the AUX input.

What is the function of the two transistors (J3Y and A119V) in the boAt Stone 1000 circuit?

The two transistors assist in signal amplification and switching functions within the audio amplification section.

What is the purpose of the 4056A charging IC for the audio amplifier?

The 4056A charging IC regulates the battery charging process, ensuring the amplifier and other components have adequate power while avoiding overcharging.

How does the Bluetooth module interact with the audio amplifier IC?

The Bluetooth module receives wireless audio signals, converts them to analogue signals, and sends them to the ft2920P audio amplifier IC for amplification.


Read More...
Previous Post Next Post