▶ 1. Main Power IC
➔ Main Power IC Number: BP0P325-56A4
➔ Power IC Brand Name: JL
➔ Power IC Description: The BP0P325-56A4 is the central power management IC on the LC6956A board. This IC is responsible for regulating the voltage and current to various components on the board. It ensures that the device receives stable power from the battery or when connected to a charging source.
➔ Power IC Total Pin Number: 28
⤷ The IC has a total of 28 pins, which indicates it is a complex chip capable of handling multiple power management tasks such as battery charging, voltage regulation, and possibly power sequencing for different subsystems on the board.
➔ Power IC Functions And Working: It likely includes an internal DC-DC converter for stepping down or stepping up the battery voltage to the required levels, and might also have integrated protection features such as over-voltage, over-current, and thermal shutdown.
▶ 2. Charging IC
➔ Charging IC Number: AyEAE
➔ Charging IC Description: This is a dedicated IC for managing the charging of the Li-Polymer battery. Given that it has only 5 pins, it is a simpler, yet efficient charging IC, likely a linear charger, which converts the input charging voltage to a stable voltage suitable for the battery.
➔ Charging IC Total Pin: 5 Pin
⤷ 5 pins indicate that the chip likely has basic functionality—input, ground, battery connection, charge status output (for the LED), and possibly thermal feedback or a programming pin to set the charging current.
➔ Charging Connector Type: The charging connector used is a Type B connector, which is standard for many small devices. It allows easy connection to a power source such as a USB charger.
▶ 3. Charging Indicator LED
➔ Charging Indicator LED Color: Red
➔ Red LED: This LED is likely connected to the charge status output of the charging IC (AyEAE). When the device is charging, the IC pulls the pin low or high (depending on the design) to light up the LED, indicating the charging process.
➔ Operation: The red LED remains on during charging and turns off when the battery is fully charged, or it may change colour or blink to indicate different charging states (e.g., full charge, charging in progress, or fault condition).
▶ 4. Bluetooth On LED
➔ Bluetooth On LED Color: Blue
➔ Blue LED: The blue LED serves as an indicator for Bluetooth status. When the device’s Bluetooth function is active, this LED will light up, indicating to the user that the device is discoverable or connected.
➔ Operation And Working: This LED is controlled by the Bluetooth module on the board. It could be connected directly to a GPIO pin of the Bluetooth chip, or it might be driven by a transistor circuit if more current is needed.
▶ 5. Crystal Oscillator
➔ Crystal Oscillator Frequency: The crystal oscillator operates at 26MHz, which is a common frequency used in Bluetooth systems for generating the clock signal necessary for the digital circuits in the Bluetooth chip.
➔ Crystal Oscillator Pins: The crystal has 4 pins, two of which are typically connected to the ground, and the other two are connected to the oscillating circuit inside the Bluetooth module.
▶ 6. Microphone
➔ Microphone Number: SH-018
➔ Microphone Type: The SH-018 is a small, electret condenser microphone, which converts sound waves into electrical signals.
➔ Microphone Total Pin: 2 Pin, one for the signal output and one for the ground.
➔ Microphone Operation: This microphone is used to capture audio input, such as voice commands or calls. The signal from the microphone is typically very low voltage and needs amplification, which might be done by an external amplifier circuit or an integrated audio codec in the Bluetooth chip.
▶ 7. Battery:
➔ Battery Model: XD 481036
➔ Battery Type: Rechargeable Li-Polymer Battery
The battery is a rechargeable Li-Polymer battery, which is known for its high energy density, lightweight, and flexibility in shape.
➔ Battery Capacity: 3.7v,150mAh
⤷ The battery has a nominal voltage of 3.7V and a capacity of 150mAh, which is typical for small, portable devices that require compact power sources.
➔ Battery Designation: 1ICP5/11/38 indicates the battery's classification and size in millimetres.
➔ Battery Operation: This battery powers the entire board. The charging IC (AyEAE) ensures that the battery is safely charged to its full capacity without overcharging, which could damage the battery or reduce its lifespan.
▶ 8. Charging Input Specifications
➔ Charging Input Voltage: 5 Voltage
⤷ The device is designed to be charged with a 5V input, which is standard for USB power sources. This voltage is stepped down by the charging IC to match the battery’s charging requirements.
➔ Charging Input Ampere: 2 Ampere
⤷ The device can accept up to 2A of current during charging, allowing for relatively fast charging given the small capacity of the battery.
➔ Charging Time Load Voltage: 3.9V
⤷ 3.9V is a typical voltage during the charging process of a Li-Polymer battery.
➔ Charging Time Load Ampere: 0.2A
⤷ 0.2A indicates the current being drawn by the battery as it charges, which likely reduces as the battery approaches full charge to prevent overcharging.