UCC2919DG4

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The UCC2919-DG4 is a Hot Swap controller IC, developed by Texas Instruments (TI), for high current power supplies. It is a single chip device that integrates a high-side MOSFET driver and a current-limit circuit. It is optimized for use in hot-swap applications. The device is rated for operation from -40°C to +85°C and is packaged in 8-pin SOIC or 8LD packages.

Application Field of UCC2919DG4

The UCC2919-DG4 Hot Swap controller is designed for applications where a protected, high-powered supply is needed. This includes powering high-end microcontrollers and accessories requiring up to 1.5A of current.

This Hot Swap controller has applications in a variety of industries, such as automotive, consumer electronics, automotive diagnostic tools, industrial control, medical, and lighting. It can be used for applications ranging from powering consumer electronics such as MP3 players, cell phones and PDAs, to powering industrial components such as pumps and servos.

The UCC2919DG4 can provide up to 1.5A output current with up to 500ms of inrush current protection. It is stable with an output capacitance of up to 100mF and is reverse voltage protected for both output and input. It is capable of controlling MOSFETs with up to 10V gate drive voltages.

Working Principle of UCC2919DG4

The UCC2919DG4 Hot Swap controller IC uses a sensing circuit to monitor the load current and protect the supply from over-current. When load current rises beyond the current limit, the MOSFET driver shuts off to prevent damage from excessive current. The device also protects the load by shutting off the supply if the input voltage drops below a certain threshold, protecting the load from overvoltage.

The device also features a current-limited start-up to protect the supply from inrush currents. The device monitors the load current, input voltage and temperature, and can shut down the system if any of these conditions are exceeded. The device can also warn of excessive temperature or voltage, allowing the user to react appropriately.

In addition, the device is flexible and can be used in both single and stand-alone applications, with either AC or DC supplies. It can be used to supply multiple loads or to protect a single load, and can be programmed to allow operation at different voltage, current and temperature ranges. It can even be programmed to cut off the power when the load current crosses a particular threshold.

Overall, the UCC2919DG4 Hot Swap controller is a highly advanced and reliable IC, with numerous features and functions to protect a supply from overcurrent, undervoltage, and over-temperature conditions. Its unique design ensures that the supply is always protected, no matter what the load or environmental conditions are.

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