UCC3803PW

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UCC3803PW is an inexpensive 3-A Peak/2-A average load current-limited power switch, designed for use as a power supply in a variety of applications, including LED lighting and power conversion. Designed for single-cell, dual-cell, or triple-cell Li-ion and Li-polymer battery voltage applications, it contains three stages of protection, load current limiting, overtemperature shut down, and undervoltage lockout. It is also compatible with padge MOSFETs.

The application field of the UCC3803PW mainly includes power supply for LED lighting, power conversion, etc. With simple circuit design, the chip is your best companion to satisfy the demand for power supply in various electronic products. In addition, the UCC3803PW can also be designed to provide power in most applications, such as handset power management, portable power, and non-dimmable LED light sources when the board-side components are used to set the dimming characteristics.

The UCC3803PW is a DC DC switching controller, containing some important features such as open loop current limiting, automatic thermal shutdown, undervoltage lockout, pulse skipping mode in light-load operation, and thermal protection. In addition, UCC3803PW also has fast startup and less external configuration, making it an ideal choice for battery-powered applications.

The working principle of UCC3803PW is relatively simple: First, a constant current source generates an average current, corresponding to the operation of the current limiting protection circuit. Second, an undervoltage lockout (UVLO) circuit is used to prevent the device from operating when the output voltage is too low. Finally, the output voltage is sensed and fed back to the controller via a voltage divider. The controller will then either increase or decrease its current source as needed to maintain the desired output voltage, thus providing the necessary current for regulating the output voltage.

The UCC3803PW is an ideal solution for most power supply requirement applications, including battery-powered solutions. Its features, such as open loop current limiting, automatic thermal shutdown, and undervoltage lockout, ensure good performance and a reliable power supply for a wide range of applications. In addition, the fast startup and less external configurations make the UCC3803PW an excellent choice for cost-sensitive applications.

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