LNK632DG

The LNK632DG is a member of the LinkSwitch-TN2 family of off-line switcher ICs designed for non-isolated flyback and buck-boost power supplies. This IC integrates a 700 V power MOSFET, a multi-mode quasi-resonant (QR) / discontinuous mode (DCM) flyback controller, and safety features, all in a compact and efficient package.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

• BP/M: Bypass and multi-function input for control and fault protection
• DS: Drain and source connection of the internal MOSFET (Power)
• RTN: Return for control and bias                                 circuits
• FB: Feedback input for output voltage regulation
• EN/UV: Enable input and undervoltage shutdown

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the LNK632DG IC for a visual representation.

Key Features

• High-Voltage MOSFET: Integrates a 700 V power MOSFET, enabling direct connection to the bulk capacitor for significant system cost savings.
• Quasi-Resonant Operation: Operates in quasi-resonant mode to maximize efficiency and minimize EMI.
• Advanced Safety and Protection Features: Incorporates features such as line undervoltage detection, thermal shutdown, and output overvoltage protection.
• Efficiency and Power Density: Offers high efficiency and power density, making it suitable for a wide range of power supply applications.
• Compact Package: Available in a small, low-profile eSIP package, enabling compact and cost-effective designs.

Note: For detailed technical specifications, please refer to the LNK632DG datasheet.

Application

• LED Lighting: Suitable for non-isolated LED driver applications requiring high efficiency and compact designs.
• Consumer Electronics: Used in power supplies for various consumer electronic devices, including smart home appliances and entertainment systems.
• Industrial Power Supplies: Ideal for integrating into industrial power supply units for reliable and efficient power delivery.

Functionality

The LNK632DG combines high-voltage power MOSFET and a multi-mode quasi-resonant flyback controller, providing a comprehensive solution for non-isolated power supplies. It delivers efficient, reliable, and cost-effective power conversion for a variety of applications.

Usage Guide

• Power Supply: Connect the DS pin to the output power supply, and the RTN pin to the reference ground.
• Feedback Loop: Use the FB pin to control and regulate the output voltage of the power supply.
• Enable Control: Connect the EN/UV pin to the enable control circuitry for turning the IC on/off as needed.

Frequently Asked Questions

Q: What is the maximum operating frequency of the LNK632DG?
A: The LNK632DG operates at a frequency typically around 132 kHz, depending on the load and operating conditions.

Q: Can the LNK632DG be used in high-power applications?
A: Yes, the LNK632DG is suitable for various power levels and can be designed into high-power applications with proper thermal management.