LNK6763V

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The LNK6763V is a high-frequency current-mode or voltage-mode offline switcher integrated circuit designed for the optimization of power efficiency, size and cost in AC/DC adapter applications. It offers a comprehensive set of features such as high frequency current-mode or voltage-mode control, fast commutation, synchronization, soft start and automatic overload protection.

The most important application field of the LNK6763V is as a DC/DC converter with wide input voltage range. Some examples of DC/DC converter applications are automotive, industrial and medical devices. Another application is in AC/DC adapters and power converters where high frequency control is used to optimize the power efficiency.

The LNK6763V operates in the current-mode or voltage-mode control depending on the selected operating mode. In current-mode control, the voltage output is regulated by monitoring and controlling the current. The current-mode operation is optimized to provide low output voltage ripple. The voltage-mode control is suitable for applications where the output voltage ripple is not so critical. The voltage-mode control is also suitable for synchronization of multiple converters.

The operating principle of the LNK6763V switcher is relatively simple. The internal regulator monitors the output voltage and adjusts the switching frequency in order to maintain the desired voltage. This is done by sensing the output voltage and comparing it with the setpoint voltage. If the output voltage is higher than the setpoint voltage, the internal regulator reduces the switching frequency. Conversely, if the output voltage is lower than the setpoint voltage, the internal regulator increases the switching frequency. The switching frequency is then used to drive the power switch.

The LNK6763V switcher can also be used in a wide range of applications such as LCD TV/monitor power supplies, notebook computer adapters and power supplies, white goods, telecom equipment and other general purpose power supplies. The wide input voltage range of the device makes it suitable for use with a wide variety of power sources. It is also capable of operating at a wide range of switching frequencies allowing it to be used in a wide range of application scenarios.

The LNK6763V also has comprehensive protection features such as adjustable under voltage lock-out (UVLO) and over current protection. The adjustable UVLO threshold ensures that the device does not enter damaging modes of operation in the event of an accidental short circuit or overload. The over current protection feature ensures that the power switch is not damaged in the event of an over current condition.

In summary, the LNK6763V is a high-frequency current-mode or voltage-mode offline switcher that is suitable for use in a wide range of applications including DC/DC converters, AC/DC adapters and general purpose power supplies. The device offers a comprehensive set of features that make it suitable for optimizing power efficiency, size and cost in these applications. It also has a variety of protection features to protect against accidental shorts and overloads and to ensure stable operation.

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