The UCC3818ADR is a high-voltage, high-power step-down switching regulator controller produced by Texas Instruments. It is specifically designed for off-line applications, such as power supply units (PSUs) for televisions, monitors, and other consumer electronics.
Description:
The UCC3818ADR is a monolithic integrated circuit that provides a complete solution for off-line power supply applications. It includes a high-voltage startup circuit, an under-voltage lockout (UVLO), a power save mode, and a thermal shutdown protection. The device also features a high-voltage power MOSFET driver and a current sensing circuit.
Features:
- Wide input voltage range: The UCC3818ADR can operate with input voltages ranging from 45V to 65V, making it suitable for a variety of off-line applications.
- High output current: The device can deliver up to 3A of continuous output current, making it suitable for high-power applications.
- High efficiency: The UCC3818ADR features a high-efficiency synchronous rectification mode, which reduces power dissipation and improves overall efficiency.
- Power save mode: The device can enter a low-power mode during light load conditions, further improving efficiency and reducing power consumption.
- Thermal shutdown protection: The UCC3818ADR includes a thermal shutdown feature that protects the device from overheating.
- Under-voltage lockout (UVLO): The device has an integrated UVLO circuit that prevents it from operating if the input voltage falls below a certain threshold.
- High-voltage startup: The UCC3818ADR features a high-voltage startup circuit that allows it to operate with input voltages as low as 45V.
Applications:
- Power supply units (PSUs) for televisions and monitors
- High-power consumer electronics
- Industrial power supplies
- Medical equipment power supplies
- Telecommunication equipment power supplies
- Computer power supplies
In summary, the UCC3818ADR is a versatile and efficient step-down switching regulator controller designed for high-voltage, high-power off-line applications. Its wide input voltage range, high output current capability, and various protection features make it suitable for a wide range of power supply applications.