Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| OutputType | Transistor Driver |
| Function | Step-Up/Step-Down |
| OutputConfiguration | Positive, Isolation Capable |
| Topology | Flyback, Forward Converter |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 8.5V ~ 16V |
| Frequency-Switching | 250kHz |
| DutyCycle(Max) | 70% |
| SynchronousRectifier | Yes |
| ClockSync | Yes |
| ControlFeatures | Current Limit, Enable, Soft Start |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | 20-VFQFN Exposed Pad |
Overview
Description
The UCC2897ARGPR is a high-performance pulse-width modulation (PWM) controller designed for isolated and non-isolated power converter applications. Manufactured by Texas Instruments, this integrated circuit is particularly suited for applications such as DC-DC converters, where efficiency and precise control are crucial. The UCC2897ARGPR features a current-mode control architecture, which provides inherent cycle-by-cycle current limiting, simplifying the design of power converters. It also includes a programmable soft-start function, reducing inrush current and enhancing the reliability of the power supply.
One of its key features is the integrated synchronous rectifier control, which helps improve efficiency by reducing power losses typically associated with diode rectification. The device supports both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), making it versatile in handling various power levels and load conditions. Additionally, the UCC2897ARGPR offers protection features such as over-voltage protection, under-voltage lockout, and thermal shutdown, which enhance the safety and robustness of power systems. Its compact packaging and advanced features make it a popular choice in telecom, industrial, and consumer electronics applications.
One of its key features is the integrated synchronous rectifier control, which helps improve efficiency by reducing power losses typically associated with diode rectification. The device supports both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), making it versatile in handling various power levels and load conditions. Additionally, the UCC2897ARGPR offers protection features such as over-voltage protection, under-voltage lockout, and thermal shutdown, which enhance the safety and robustness of power systems. Its compact packaging and advanced features make it a popular choice in telecom, industrial, and consumer electronics applications.
Equivalent
The UCC2897ARGPR is a PWM controller used primarily in isolated converter applications. Equivalent products could include the LM5027 from Texas Instruments, the UC3845 from ON Semiconductor, and the NCP1252 from ON Semiconductor. These controllers serve similar functions, facilitating the design of isolated or non-isolated switched-mode power supplies. However, specific features and performance characteristics can vary, so it's essential to compare datasheets for exact specifications and compatibility with your design requirements.
Features
The UCC2897ARGPR is a high-performance PWM controller designed for applications requiring active clamp reset of the power MOSFET. Key features include:
1. Active Clamp Control: It supports active clamp reset for improved efficiency and reduced voltage stress on the MOSFET.
2. Synchronous Rectification: It incorporates control for synchronous rectifiers, enhancing efficiency particularly in low-output voltage applications.
3. Programmable Frequency: The device allows programmable switching frequency up to 1 MHz, enabling design flexibility.
4. Soft Start: It includes a programmable soft-start function, which helps in minimizing inrush current during startup.
5. Current Mode Control: The UCC2897ARGPR uses peak current mode control, offering better load transient response and simpler loop compensation.
6. Adjustable Dead Time: The controller offers adjustable dead time between the main switch and the active clamp switch.
7. Protections: It features various protection mechanisms such as cycle-by-cycle current limiting and thermal shutdown to ensure robust operation.
8. Wide Input Voltage Range: It is suitable for a wide range of input voltages, making it versatile for different applications.
These features make the UCC2897ARGPR ideal for power supply applications requiring high efficiency and reliability.
1. Active Clamp Control: It supports active clamp reset for improved efficiency and reduced voltage stress on the MOSFET.
2. Synchronous Rectification: It incorporates control for synchronous rectifiers, enhancing efficiency particularly in low-output voltage applications.
3. Programmable Frequency: The device allows programmable switching frequency up to 1 MHz, enabling design flexibility.
4. Soft Start: It includes a programmable soft-start function, which helps in minimizing inrush current during startup.
5. Current Mode Control: The UCC2897ARGPR uses peak current mode control, offering better load transient response and simpler loop compensation.
6. Adjustable Dead Time: The controller offers adjustable dead time between the main switch and the active clamp switch.
7. Protections: It features various protection mechanisms such as cycle-by-cycle current limiting and thermal shutdown to ensure robust operation.
8. Wide Input Voltage Range: It is suitable for a wide range of input voltages, making it versatile for different applications.
These features make the UCC2897ARGPR ideal for power supply applications requiring high efficiency and reliability.
Pinout
The UCC2897ARGPR is a high-performance PWM controller with active clamp reset topology, primarily used for isolated DC-DC converters. It is produced by Texas Instruments. This device is typically housed in a 16-pin package. The main functions of the UCC2897ARGPR include:
1. PWM Control: Manages the pulse-width modulation for efficient power conversion.
2. Active Clamp Reset: Ensures efficient energy recovery and reduces stress on the transformer and switches.
3. Soft Start: Gradually increases the output voltage during startup to avoid inrush currents.
4. Overcurrent Protection: Protects the system from excessive current by shutting down the output.
5. Synchronization: Allows the controller to synchronize with an external clock for better system integration.
6. Error Amplification: Provides feedback control to maintain output voltage accuracy under varying load conditions.
These functions make the UCC2897ARGPR well-suited for use in high-density power supply applications, such as telecom and server power systems.
1. PWM Control: Manages the pulse-width modulation for efficient power conversion.
2. Active Clamp Reset: Ensures efficient energy recovery and reduces stress on the transformer and switches.
3. Soft Start: Gradually increases the output voltage during startup to avoid inrush currents.
4. Overcurrent Protection: Protects the system from excessive current by shutting down the output.
5. Synchronization: Allows the controller to synchronize with an external clock for better system integration.
6. Error Amplification: Provides feedback control to maintain output voltage accuracy under varying load conditions.
These functions make the UCC2897ARGPR well-suited for use in high-density power supply applications, such as telecom and server power systems.
Manufacturer
The UCC2897ARGPR is manufactured by Texas Instruments (TI). Texas Instruments is an American technology company that specializes in the design and manufacturing of semiconductors and various integrated circuits. These products are widely used in electronics across various industries, including consumer electronics, automotive, industrial, and communications equipment. TI is known for its innovations in analog and embedded processing technologies, and it serves a global market. The company focuses on providing solutions that help customers efficiently manage power, interface with other systems, and process data.
Application
The UCC2897ARGPR is a synchronous rectifier PWM controller primarily used in isolated power supply applications. Its typical application areas include telecommunications equipment, servers, and networking gear where efficient power conversion is crucial. It is designed for high-efficiency DC-DC converters and can be found in applications like distributed power systems, where it helps manage power distribution with minimal loss. The controller supports various topologies, including active-clamp forward converters, making it suitable for medium to high-power applications. Its features enable optimized performance in power supply designs that require tight regulation and fast transient response.
Package
The UCC2897ARGPR is a Texas Instruments controller for active clamp reset forward converters. It is available in a TSSOP (Thin Shrink Small Outline Package) with 16 pins, specifically the PowerPAD™ package for improved thermal performance and compact design.