LNK501P

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The LNK501P is a high-performance pulse-width modulation (PWM) controller specifically designed for offline switcher applications. It provides all the necessary control, current sensing and protection circuitry to control commercially-available power switches such as Adjustable Switching REGulators (ASRs), MOSFETs, BJTs, and IGBTs. This integrated IC provides an efficient and reliable solution for low-cost AC-DC and DC-DC converter power supplies for applications ranging from desktop computers to telecom systems, consumer devices and industrial automation.

The LNK501P contains an internal 500 V minimum break-over voltage and it can handle up to 2.5A of output current. It is designed specifically for soft-switching applications, providing better efficiency and lower EMI than traditional hard-switching designs. In addition, the internal startup and shutdown circuitry provides an additional level of protection for the external power switches.

The LNK501P operates using a linear voltage regulator (LVR) architecture which results in a high level of efficiency. It includes a feedback loop which regulates the operating frequency of the controller via a resistive feedback voltage which is derived from the output voltage. This voltage then determines the frequency of operations of the PWM output.

The LNK501 provides an advanced protection feature that includes over-voltage protection, under-voltage lockout, and programmable over-current protection circuit. All these integrated protection features help ensure safe operation of the power supply and prevent damage to components or the system.

The LNK501 also provides adjustable soft start and frequency compensation. The soft start feature allows the user to adjust the frequency and duration of the soft start cycle. Frequency compensation helps to reduce output noise and avoid instability in applications where the output voltage is subject to significant load current variations.

The LNK501P is an integrated solution that provides efficient and reliable power for a wide range of offline switcher applications. It features low EMI performance, current sensing, protection and soft-switching capability, adjustable soft-start, and frequency compensation. With its integrated protective features, high efficiency, and low cost, it is an ideal solution for AC-DC, DC-DC and other power supply designs.

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