UCC28911DR

The UCC28911DR is a high-performance, primary-side regulated (PSR) flyback controller from Texas Instruments, designed for use in AC/DC power supply applications. It integrates a high-voltage power MOSFET and supports a wide input voltage range. This controller is ideal for low to medium power applications where high efficiency and low standby power are required.
The UCC28911DR features valley-switching for reduced switching losses, leading to improved efficiency. It also incorporates primary-side regulation, which eliminates the need for an optocoupler and secondary-side feedback components, thus reducing system cost and complexity. Additionally, it includes protection features such as over-voltage protection, short-circuit protection, and thermal shutdown to enhance system reliability.
The device operates in discontinuous conduction mode (DCM), which is suitable for applications demanding high efficiency and low electromagnetic interference (EMI). Its compact size and integrated functionalities make it particularly useful for power adapters, chargers, and small power supplies. The UCC28911DR offers a robust solution for designers aiming to meet stringent energy efficiency standards.

The UCC28911DR is a flyback switcher from Texas Instruments designed for isolated power supplies. Equivalent products include the Power Integrations TOPSwitch series (e.g., TOP246Y), NXP's TEA1733 series, and ON Semiconductor's NCP1014 series. These alternatives offer similar functions for high-efficiency, isolated power supplies in applications like chargers and adapters. Always check the specific electrical requirements and pin compatibility when selecting an equivalent.

The UCC28911DR is a high-efficiency, flyback power supply controller designed for offline applications. It features a primary-side regulated (PSR) control which eliminates the need for an optical isolator, reducing component count and cost. The device supports a wide input voltage range and is designed to deliver up to 12 W output power.
Key features include:
1. High-precision voltage regulation with ±5% output voltage tolerance.
2. Quasi-resonant switching for improved efficiency and reduced electromagnetic interference (EMI).
3. Integrated high-voltage start-up switch.
4. Built-in protection features such as overvoltage, overcurrent, over-temperature, and short-circuit protection.
5. Frequency jittering for EMI reduction.
6. Adjustable line compensation and constant current regulation for various load conditions.
7. Low no-load power consumption, making it suitable for energy-efficient designs.
These features make the UCC28911DR ideal for applications like power adapters, chargers, and auxiliary power supplies.

The UCC28911DR is an integrated PWM (Pulse Width Modulation) controller with a high-voltage startup feature, designed primarily for off-line, isolated flyback power supplies. It is produced by Texas Instruments and is typically used in applications such as adapters, chargers, and auxiliary power supplies.
The UCC28911DR comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. Here is a brief overview of its pin functions:
1. VDD (Pin 1): Power supply input for the controller.
2. GND (Pin 2): Ground reference for the IC.
3. FB (Pin 3): Feedback input to regulate output voltage.
4. CS (Pin 4): Current sense input for monitoring the primary current.
5. DRV (Pin 5): Drive output to control the gate of the power MOSFET.
6. NC (Pin 6): No connection, typically unused.
7. HV (Pin 7): High-voltage start-up input, used to power the IC during startup.
8. VDD (Pin 8): Connected internally, typically not used externally.
These pins collectively enable the UCC28911DR to control power conversion efficiently, providing regulation and protection features suitable for compact and energy-efficient power supplies.

The UCC28911DR is manufactured by Texas Instruments (TI), an American technology company. Texas Instruments is known for designing and manufacturing semiconductors and integrated circuits, which are used in a broad range of electronic devices. The company is a major player in the electronics industry, providing components for sectors such as automotive, industrial, personal electronics, communications equipment, and enterprise systems. TI is renowned for its innovation in analog and embedded processing products, which are crucial for various applications and technologies.

The UCC28911DR is primarily used in isolated flyback power supply applications. Its main application areas include:
1. AC-DC Converters: Used in chargers and adapters for consumer electronics.
2. Standby Power Supplies: Utilized in TVs, set-top boxes, and home appliances.
3. LED Drivers: Supports LED lighting solutions by providing efficient power conversion.
4. Industrial Power Supplies: Suitable for low-power industrial equipment.
5. Smart Metering: Provides power conversion in energy meters and similar devices.
The UCC28911DR integrates a PWM controller with a high-voltage MOSFET, making it ideal for low-power, high-efficiency designs.

The UCC28911DR is a high-voltage switcher designed for offline flyback converters, and it comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. This package type is suitable for surface-mount technology (SMT) applications.