UCC28740DR

The UCC28740DR is a highly integrated, primary-side regulation (PSR) controller designed for offline, isolated power supplies. It is part of Texas Instruments' UCC287x family, optimized for a wide range of applications, including AC-DC adapters, chargers, and power supplies for consumer electronics.
Key features include built-in high-voltage start-up capability, a low standby power consumption mode, and the ability to deliver high efficiency across a range of loads. The device utilizes frequency modulation to regulate output voltage, providing accurate control without the need for an opto-isolator.
The UCC28740 supports various protection features such as over-voltage protection (OVP), under-voltage lockout (UVLO), and thermal shutdown, ensuring reliable operation. Its compact design and integration simplify PCB layout and reduce component count, making it suitable for space-constrained applications.
Overall, the UCC28740DR is an ideal choice for designers seeking efficient, reliable power supplies with minimal external components.

The UCC28740DR is a highly integrated, flyback converter controller designed for isolated power supplies. Key features include:
1. Wide Input Voltage Range: Operates from 85V to 265V AC, suitable for various input voltages.
2. High Efficiency: Supports high efficiency up to 94%, minimizing energy loss.
3. Primary-Side Regulation: Eliminates the need for an opto-isolator, simplifying design and reducing cost.
4. Adaptive Frequency Modulation: Optimizes switching frequency to improve efficiency and reduce EMI.
5. Built-in Protections: Features over-voltage protection, over-temperature protection, and open-loop protection, enhancing reliability.
6. Low Standby Power: Provides a low standby power mode, crucial for energy-saving applications.
7. Integrated Startup Circuit: Allows for reduced external component count and space-saving.
8. Programmable Output Voltage: Offers flexibility for various application requirements.
These features make the UCC28740DR ideal for applications such as chargers, power adapters, and auxiliary power supplies in consumer electronics.

The UCC28740DR is available in a 16-pin HTSSOP (Heat Sink Thin Small Outline Package) package type, which is designed for efficient thermal performance and space-saving in electronic applications.

The UCC28740DR is a highly integrated power supply controller from Texas Instruments, designed for use in isolated flyback converters. It features a total of 16 pins, each serving specific functions to support efficient power management.
Key pin functions include:
1. VIN (Pin 1): Input voltage supply.
2. CS (Pin 2): Current sense for primary current regulation.
3. GND (Pin 3): Ground reference.
4. VREF (Pin 4): Reference voltage output.
5. VDD (Pin 5): Supply voltage for the controller.
6. BOOT (Pin 6): Bootstrap capacitor connection for gate drive.
7. SW (Pin 7): Switch node for transformer connection.
8. OUT (Pin 8): Output voltage sensing.
9. RAMP (Pin 9): Frequency modulation ramp input.
10. COMP (Pin 10): Compensation network connection.
11. FB (Pin 11): Feedback pin for output voltage regulation.
12. SENSE (Pin 12): Sensing for secondary-side regulation.
13. PLIM (Pin 13): Primary-side current limit.
14. ISENSE (Pin 14): Additional sense for current limiting.
15. RC (Pin 15): RC timing for soft start.
16. TRIM (Pin 16): Output voltage trim adjustment.
These pins facilitate various functionalities, including voltage regulation, current sensing, and protection features.

The UCC28740DR is manufactured by Texas Instruments (TI), a global semiconductor company headquartered in Dallas, Texas. Texas Instruments specializes in designing and manufacturing a wide range of semiconductor and integrated circuit solutions, including analog, digital signal processing, and microcontroller technologies. The company serves various markets, including automotive, industrial, communications, and consumer electronics. TI is known for its innovation and focus on high-performance products, offering solutions that enable efficient power management and various other applications across multiple industries.

The UCC28740DR is a high-performance power supply controller primarily used in applications such as adapters, power bricks, and chargers for consumer electronics, LED drivers, and industrial equipment. It enables efficient isolated power conversion with features like low standby power, high efficiency, and advanced safety protections. Its versatility makes it suitable for both offline and flyback applications in various electronic devices.

The UCC28740DR chip is a flyback controller primarily used for power supply applications. Equivalent products include the ON Semiconductor NCP1200, the Microchip MCP16301, and the STMicroelectronics L6585. These alternatives provide similar functionalities for isolated and non-isolated power supply designs in various output power ranges. Always check specific datasheets for detailed specifications and compatibility.