LNK302GN-TL Integrated Circuits (ICs)

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The LNK302GN-TL is a low cost, high efficiency, offline switch mode power supply controller IC used for a variety of power management and condition applications. The device includes a high voltage power MOSFET switch and has protection functions for open LED and LED short fault conditions. The LNK302GN-TL is a part of the LinkSwitch-TN family of integrated offline switcher ICs.

The device integrates a 700 V power MOSFET, a controller, and protection functions in a single 8-pin package. The package is designed to minimize the number of external components, which reduces cost and design time. The device is optimized for flyback converters in applications where no current sense circuit is used, such as secondary side regulation in adapter and lighting applications.

The LNK302GN-TL is based on an architecture called Proportional Voltage Controlled Off-time (PVCO). The PVCO architecture provides precise, stable, and low-cost control by controlling the Flyback converter’s off-time through an internal voltage control loop. The proportional voltage control ensures low output ripple and excellent line regulation by automatically adjusting off-time of the switch’s duty cycle when the line voltage, the load current, or the output voltage changes.

The device features an 8 kHz oscillator frequency and a 700 V MOSFET switch integrated in a single package, eliminating the need for an external MOSFET and reducing total cost and design time. The device also features an input under-voltage lock-out (UVLO) and output over-voltage protection (OVP). The device is capable of operating in temperatures ranging from –40 to 125°C, allowing for a wide variety of applications.

The LNK302GN-TL is suitable for a variety of AC-DC converter and offline switcher applications such as secondary side regulation (SSR) in OLED TV adapters, LCD monitor adapters and LED lighting. The device can be used in universal input applications, both isolated and non-isolated, and provides leading edge dimming control with phase dimming, burst mode dimming, and pulse-width modulation (PWM) dimming.

In conclusion, the LNK302GN-TL is a low cost and highly efficient AC-DC converter and off-line switcher IC for a variety of power management and conversion applications. Its robust features, such as an integrated MOSFET, an 8 kHz oscillator frequency, and wide temperature range, make it an ideal choice for applications looking for better performance and lower cost. The device is designed to minimize the number of external components while providing excellent line regulation and low output ripple, making it an ideal device for a wide range of AC-DC converter and off-line switcher applications.

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