UCC2889N

UCC2889N Product Details

Product Parameters of UCC2889N

•  Product Name: UCC2889N

•  Manufacturer: Texas Instruments

•  Package: 8-DIP (0.300", 7.62mm Width)

•  Category: AC/DC & Isolated DC/DC Switching Regulators

•  Description: Primary Side Startup Controller, 12.5/8.3V UVLO, -55°C to 150°C

•  Operating Temperature: -55°C to 150°C

•  Output Current: 1A

•  Switching Frequency: 50kHz ~ 1MHz

•  Input Voltage: 8.3V to 15V

•  Output Voltage: Adjustable

•  Duty Cycle: 72%

Product Introduction of UCC2889N

The UCC2889N is a primary side startup controller that can be used for isolated or non-isolated power converters. It features a UVLO (under voltage lockout) function that prevents the power switch from turning on until the input voltage reaches a sufficient level. It also has a programmable maximum duty cycle function that limits the output voltage and protects the power switch from over-stressing. The UCC2889N operates from a wide input voltage range of 8.3V to 15V and can provide an adjustable output voltage with a 72% duty cycle. The switching frequency is fixed at 50kHz ~ 1MHz, which allows the use of small and low-cost components. The UCC2889N is available in an 8-DIP package and can operate from -55°C to 150°C.

Product Application Scope of UCC2889N

The UCC2889N can be used for various applications that require high efficiency, high isolation, and low output ripple, such as:

•  Telecom and datacom power supplies

•  Industrial and medical power supplies

•  Auxiliary power supplies for appliances and consumer electronics

•  Battery chargers and adapters

•  LED drivers and lighting systems

Common Questions and Answers of UCC2889N

•  Q: What is the difference between UCC2889N and UCC2889D?

•  A: The UCC2889N is an 8-DIP version of the UCC2889D, which has the same functionality and performance. The UCC2889N is suitable for through hole mounting, while the UCC2889D is suitable for surface mount.

•  Q: What is the purpose of the UVLO function of the UCC2889N?

•  A: The UVLO function of the UCC2889N is a feature that prevents the power switch from turning on until the input voltage reaches a sufficient level. This ensures that the power switch is not damaged by a low input voltage condition. The UVLO function has two thresholds: a turn-on threshold of 12.5V and a turn-off threshold of 8.3V. When the input voltage is below the turn-off threshold, the power switch is turned off and the output voltage is zero. When the input voltage rises above the turn-on threshold, the power switch is turned on and the output voltage is regulated.