LNK6407D-TL

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The LNK6407D-TL is a versatile AC-DC power supply integrated circuit (IC) with extremely low standby power. It is typically used for isolated power supplies in low power offline switched mode power supplies (SMPS) with extremely low output power. LNK6407D-TL is a highly integrated low-cost AC-DC offline switcher that meets global energy efficiency standards.

The LNK6407D-TL combines a low start-up, low quiescent current PWM controller, power MOSFET, opto coupler, bias winding, and other components into a small space. It comes in a SOIC-20 package and operates in the 8- to 50-V DC range. It is designed for offline applications with output voltages ranging from 12 to 48 V DC, and is compliant with IEC 60950-1, EN60950-1, and UL60950-1 safety standards. The LNK6407D-TL provides excellent efficiency and power density, while also providing protection against short-circuit and open-circuit as well as over-temperature protection. With its excellent design, the LNK6407D-TL offers a cost-effective solution for a variety of AC-DC offline switch and isolated transformer designs with small form-factors.

The LNK6407D-TL operates over a wide frequency range from 25 kHz up to 265 kHz, making it suitable for applications with high frequency switching operations. The device requires an external opto coupler feedback, along with an additional external bias winding and power stage components, to set the output voltage and current. The opto coupler signal is used to detect zero crossing, which enables a very precise timing signal and very low power consumption. Moreover, the device is designed to provide a very low standby power, typically less than 0.5W, when in no-load condition. This ensures low power consumption even when the output is not in use.

The main advantage of LNK6407D-TL is its enhanced power conversion efficiency compared to other isolated and non-isolated low power SMPSs. This efficiency is further improved thanks to the advanced power stage design and the internal ripple voltage compensation of the PWM controller. Additionally, the internal shutdown, thermal shutdown, and over-current clamp features make the device suitable for a wide range of applications.

In summary, the LNK6407D-TL is a low power and cost-effective AC-DC power supply IC that is designed for a wide variety of offline SMPS and isolated transformer topologies. The device offers very low standby power, high efficiency, and excellent system performance, making it a perfect choice for cost-sensitive AC-DC applications. It is suitable for applications with output voltages ranging from 12 to 48 V DC, and can be used in applications where IEC 60950-1, EN60950-1, and UL60950-1 safety standards must be met.

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