LNK616DG-TL

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LNK616DG-TL Application field and Working Principle

PMIC - AC DC Converters, Offline Switchers are components designed for the power management of switch-mode power supplies. This article will explain the application field, and working principle of the LNK616DG-TL.

Application Field

The LNK616DG-TL is a low side N-channel MOSFET, rated at 160V, with a 6A current limit and a dissipation rating of 1.5W. Due to its low side configuration, it can be used in Buck and Buck-Boost converter applications as well as Flyback and Forward converters. It has both pin-out and screen options to facilitate fit within SMPS layouts. Due to its small size and low power, it can be used in space-constrained applications.

Working Principle

The LNK616DG-TL works on a simple principle. It contains N-channel MOSFETs that can switch between on and off states. The switching on and off is controlled by the logic levels of the input signals, generally referred to as the High Side and Low Side. When the Low Side logic level is high, the MOSFET is switched on and the power supply is output at the load. When the Low Side is low, the MOSFET is switched off and the power supply stops outputting at the load.

When the High Side is low, the MOSFET is switched off and the power supply stops outputting at the load. When the High Side is high, the MOSFET is switched on and the power supply is output at the load. This switching is referred to as a Hard Switching and is controlled by the logic levels of the input signals.

The LNK616DG-TL also contains a special feature known as Thermal Shutdown. This is a temperature protection feature that shuts down the MOSFET when the junction temperature of the MOSFET exceeds a certain level. This ensures that the MOSFET does not get damaged due to overheating.

In addition to the Hard Switching and Thermal Shutdown, the LNK616DG-TL also contains a Soft Switching feature. This allows the MOSFET to transition between the on and off states slowly, allowing the power supply to be output at the load without sudden power spikes or sharp changes in current.

The LNK616DG-TL also includes a noise power amplifier, which is used to reduce EMI emissions. The noise power amplifier reduces the emitted noise power by reducing the high frequency switching noise in the supply voltage.

Conclusion

The LNK616DG-TL is an ideal component for use in power management applications such as SMPS, due to its low power, small size, and feature set. It has a hard switching feature, along with thermal shutdown and soft switching which makes it an attractive choice for designers. It also has a noise power amplifier to reduce EMI emissions, making it a suitable choice for applications requiring low EMI emissions.

In conclusion, the LNK616DG-TL is a powerful and versatile component that comes in a small package. It is well suited for use in power management applications such as SMPS, due to its low power, small size, feature set, and noise power amplifier.

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