The LX-LCBST Li-Ion Battery Charger with Step-Up Boost 4-28V is a versatile module designed for charging a single 3.7V Li-Ion battery and providing an adjustable output voltage range of 4V to 28V through a boost converter. This type of module is often used in DIY projects and small portable power supply systems. Below is an overview of the key components, functionality, and features of this module:
Key Components:
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TP4056 Charging Circuit:
- The TP4056 is a popular and widely used lithium-ion battery charger IC. It charges a single-cell 3.7V Li-ion battery and is responsible for constant current/constant voltage charging, ensuring safe and efficient charging of the battery.
- The TP4056 handles basic charging functions, including overcharge protection, thermal regulation, and short-circuit protection.
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HM5434 Battery Protection Chip:
- The HM5434 is a battery protection IC that is typically used in lithium-ion battery protection circuits. It protects the battery from overcharging, overdischarging, and short circuits.
- This chip ensures the safety of the lithium-ion battery by preventing situations that could lead to damage, such as excessive voltage or current.
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MT3608 Step-Up Boost Converter:
- The MT3608 is a DC-DC boost converter that can step up the voltage from the battery (3.7V) to a higher, adjustable output voltage.
- The output voltage can be adjusted via a trimmer potentiometer to a range of 4V to 28V, which allows flexibility in powering a variety of devices.
- The module uses this boost converter to provide power to devices that require higher voltages than the battery's nominal voltage.
Features and Functionality:
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Battery Charging:
- The module allows for charging a single-cell 3.7V Li-ion battery safely via the TP4056 circuit. The charging voltage is typically 4.2V (fully charged).
- Charge Input: It likely uses a USB Type-C input to charge the battery.
- Battery Protection: The HM5434 protection chip ensures the battery is protected against overcharging, overdischarge, and short circuits.
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Step-Up Conversion (Boost Converter):
- The MT3608 boost converter increases the voltage from the 3.7V battery to an adjustable output voltage between 4V and 28V, which can be set using a trimmer potentiometer.
- This allows you to power devices that require different voltages, such as small electronics, charging other batteries, or powering devices like Arduino boards.
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Adjustable Output:
- The voltage output can be continuously adjusted between 4V and 28V, which makes the module highly flexible for various use cases. The trimmer potentiometer is used to fine-tune the output voltage.
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Safety Features:
- Short Circuit Protection: The module is equipped to handle short circuits, ensuring the connected device or battery doesn't get damaged during an overload.
- Reverse Polarity Protection: This feature ensures that the module won't be damaged if the input polarity is reversed.
Applications:
- Portable Power Banks: The module is useful for creating custom portable power banks that can charge devices or power electronics with a wide range of voltage requirements.
- DIY Electronics Projects: The adjustable output voltage makes it ideal for powering circuits or devices that need specific voltages (like 5V, 9V, 12V, or higher).
- Emergency Power Supply: The module could be used in emergency power supply systems, offering a portable solution with a broad voltage output range.
- Battery-Powered Devices: You can use this module to power battery-operated devices that require higher voltages than the typical output from a single 3.7V Li-Ion battery.
Safety Testing:
- Output Short Circuit Test: This ensures that the module can handle and protect against a short circuit at the output, avoiding potential damage to the battery or other components.
- Reverse Polarity Test: The module is designed to withstand incorrect connections, such as reversed polarity at the input, without causing damage to the components.
Considerations:
- Current Limitation: The output current depends on the specifications of the MT3608 boost converter and the capability of the 3.7V Li-ion battery. Ensure that your battery can handle the required current for your specific application.
- Heat Dissipation: When operating at higher output voltages (e.g., 28V), the boost converter may generate more heat. Ensure that the module has proper ventilation if used in high-power applications.
Conclusion:
The LX-LCBST Li-Ion Battery Charger with Step-Up Boost module is a powerful and flexible tool for a variety of applications. It combines a reliable charging circuit with the ability to step up voltage to a range between 4V and 28V, making it suitable for charging and powering different devices. With safety features like short-circuit protection, reverse polarity protection, and battery protection, it provides a reliable and safe solution for powering small electronics or building portable power banks.
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