LNK6408E

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LNK6408E is a high-performance integrated offline switcher IC device specifically designed for isolated AC/DC power supply applications. It is suitable for applications that require constant current, constant voltage and illumination; upstream power supplies; and power adapters. This device provides an integrated-power solution for LLC resonant circuit and fly-back converters. As a high-performance IC device, LNK6408E also integrates a wide range of standby, overload, short circuit, over voltage, over temperature protection, etc., monitoring and protection functions.

The main features of the LNK6408E are as follows:

• Integrated offline switcher
• Low cost, low component count
• Constant voltage and constant current
• Excellent oscillation capability
• Full range of protection including over load, over temperature, input over voltage, and short circuit

The basic operating principle of LNK6408E is based on a fly-back topology. This topology works by storing energy in the transformer at intervals. At each interval, the primary side of the transformer is switched for a brief period of time. The secondary of the transformer is then connected to the output to discharge the stored energy. The total output power depends on the amount of energy stored and the duty cycle of the switching. The duty cycle can be adjusted to control the average output power.

In a typical application, the LNK6408E is connected to a rectifier to obtain the input voltage from the AC mains. The output voltage is then regulated by the MOSFET switch. The output voltage can be programmed using an external resistor. The low component count makes the device suitable for cost-sensitive applications.

The LNK6408E provides a wide range of protection features. The device can detect when its input voltage reaches the overvoltage threshold. When this happens, the device will shut down and will not start again until the voltage goes back to an acceptable range. The device also has protection against over temperature, overload and short circuit conditions. The thermal fold-back feature allows the device to reduce the power output when the temperature reaches a certain level.

The LNK6408E is a low-cost, low-component-count integrated offline switcher IC device specifically designed for isolated AC/DC power supply applications. It can provide excellent oscillation capability and a full range of protection including overvoltage, over temperature and short circuit. It is suitable for cost-sensitive custom power supply applications.

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