What is LNK306P?

 The LNK306P is an integrated off-line switcher from Power Integrations, part of their LinkSwitch-TN family. It is designed for high-efficiency power conversion in low- to medium-power applications such as power adapters, chargers, and auxiliary power supplies. The LNK306P combines a PWM controller and high-voltage power MOSFET in a single package, making it ideal for cost-effective, compact designs in power supply systems.   

Key Features:

  1. Integrated MOSFET and PWM Controller: The LNK306P integrates a high-voltage power MOSFET and PWM control circuitry in one compact package, reducing the number of external components needed and simplifying the design process. This integration also helps reduce the overall size and cost of the power supply.

  2. Wide Input Voltage Range: The device is designed to operate from a wide input voltage range of 85V to 265V AC, which makes it compatible with both 110V and 230V AC mains voltage, enabling global use without modifications to the circuit.

  3. High Efficiency: The LNK306P is designed for high-efficiency operation, achieving typically 80% to 85% efficiency, which reduces energy loss and minimizes heat generation during operation. This is critical for reducing the size of heat dissipation components and ensuring long-term reliability.

  4. Output Power: The LNK306P can deliver output power ranging from 0.2W to 20W, depending on the specific application and design. It is particularly well-suited for low- to medium-power applications, such as low-power adapters and chargers.

  5. Low Standby Power: The IC is designed to consume very low power in standby mode, making it energy-efficient in always-on applications where the device needs to stay powered with minimal consumption, such as set-top boxes or televisions.

  6. Built-in Protection Features: The LNK306P includes several protection features to ensure safe operation:

    • Overcurrent Protection (OCP): Protects the IC from excessive current that could cause damage.
    • Thermal Shutdown: Automatically shuts down the device if the temperature exceeds a safe threshold, preventing overheating.
    • Under-voltage Lockout (UVLO): Ensures reliable operation by disabling the circuit when the input voltage is too low to function safely.
    • Overvoltage Protection (OVP): Protects the circuit from voltage spikes or surges.

  7. Soft-Start and Fixed Switching Frequency: The LNK306P employs a soft-start feature that limits inrush current at startup and a fixed switching frequency (typically 65 kHz), contributing to stable operation and reduced electromagnetic interference (EMI).

  8. Compact Package: The IC comes in an SMD-8 package (such as the DIP-8 or SOIC-8), which is small and ideal for space-constrained applications, especially in low-profile power supplies.

Applications:

  • Power Adapters: Commonly used in wall plug adapters, USB chargers, and other low- to medium-power adapters for consumer electronics like smartphones, tablets, and portable devices.
  • LED Drivers: The LNK306P is used in LED driver circuits, where it helps efficiently power LEDs with minimal heat generation and low energy consumption.
  • Set-Top Boxes and Televisions: Used in standby power supplies for devices like set-top boxes, televisions, and other consumer electronics that require continuous low-power operation.
  • Battery-Powered Devices: The low standby power consumption makes the LNK306P ideal for use in battery-operated chargers and power management circuits for various portable electronics.

Technical Specifications:

  • Input Voltage: 85V to 265V AC.
  • Output Power: 0.2W to 20W (depending on load and application).
  • Efficiency: 80% to 85% in typical designs.
  • Switching Frequency: Fixed frequency (typically 65 kHz).
  • Built-in Protection: Overcurrent protection (OCP), thermal shutdown, overvoltage protection (OVP), and under-voltage lockout (UVLO).
  • Package Types: Available in SMD-8, such as DIP-8 or SOIC-8 packages.

The LNK306P is a versatile and energy-efficient IC for low to medium power applications, ideal for powering small devices and chargers. Its integration of a high-voltage MOSFET and PWM controller simplifies the design of power supply circuits, reduces cost, and minimizes space requirements. With its built-in protection features and energy-efficient operation, the LNK306P is a reliable solution for meeting energy efficiency standards in consumer electronics and industrial power applications.  
Search List Page： LNK306P Parts Search Page | Datasheet PDF | Price | Quantity-MobikeChip  

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