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-TSSOP (0.173, 4.40mm Width) |
Overview
Description
The UCC2897APWR is a versatile integrated controller designed for use in isolated and non-isolated power supply applications, utilizing either full-bridge, half-bridge, or push-pull topologies. Manufactured by Texas Instruments, this device is part of the UCC2897A series and is particularly well-suited for phase-shifted full-bridge converters.
Key features of the UCC2897APWR include programmable switching frequency, soft-start capability, and overcurrent protection. It supports synchronous rectification, which enhances efficiency by reducing rectifier losses. The device also incorporates advanced control features like adaptive delay and dead-time control, improving performance and reliability.
The controller operates over a wide input voltage range and provides high efficiency, making it ideal for various power supply applications in telecommunications, server power supplies, and industrial equipment. It comes in a PowerPAD™ package, which aids in heat dissipation. Overall, the UCC2897APWR offers a robust solution for designers looking to implement efficient and reliable power conversion systems.
Key features of the UCC2897APWR include programmable switching frequency, soft-start capability, and overcurrent protection. It supports synchronous rectification, which enhances efficiency by reducing rectifier losses. The device also incorporates advanced control features like adaptive delay and dead-time control, improving performance and reliability.
The controller operates over a wide input voltage range and provides high efficiency, making it ideal for various power supply applications in telecommunications, server power supplies, and industrial equipment. It comes in a PowerPAD™ package, which aids in heat dissipation. Overall, the UCC2897APWR offers a robust solution for designers looking to implement efficient and reliable power conversion systems.
Equivalent
The UCC2897APWR is a PWM controller for isolated power supply applications. Equivalent products include the LM5020, NCP1207, and UC3845, though they may have variations in features and specifications. Always ensure compatibility with your specific application requirements, such as input voltage range, switching frequency, and control features, when choosing an alternative.
Features
The UCC2897APWR is a pulse width modulation (PWM) controller designed for efficient power conversion in applications utilizing a synchronous rectified isolated forward or flyback topology. Key features include:
1. Active Clamp Control: This feature helps in minimizing voltage stress on the main switch, improving efficiency, and enabling higher frequency operations.
2. Synchronous Rectification: It integrates control for synchronous rectifiers, enhancing efficiency, particularly in low-output voltage applications.
3. Wide Input Voltage Range: The controller supports a broad range of input voltages, making it versatile for various applications.
4. Programmable Soft Start: This function helps mitigate inrush current during startup, ensuring a smooth start-up sequence.
5. Overcurrent Protection: Built-in protection mechanisms guard against excessive current conditions, enhancing the safety and reliability of the power supply.
6. UVLO (Under Voltage Lockout): It ensures the controller operates only when the input voltage is above a specified level, preventing erratic operation.
7. Gate Driver Outputs: The device includes robust gate drivers for both main and synchronous switches, facilitating effective power conversion.
These features make the UCC2897APWR suitable for high-performance, efficient power supply designs.
1. Active Clamp Control: This feature helps in minimizing voltage stress on the main switch, improving efficiency, and enabling higher frequency operations.
2. Synchronous Rectification: It integrates control for synchronous rectifiers, enhancing efficiency, particularly in low-output voltage applications.
3. Wide Input Voltage Range: The controller supports a broad range of input voltages, making it versatile for various applications.
4. Programmable Soft Start: This function helps mitigate inrush current during startup, ensuring a smooth start-up sequence.
5. Overcurrent Protection: Built-in protection mechanisms guard against excessive current conditions, enhancing the safety and reliability of the power supply.
6. UVLO (Under Voltage Lockout): It ensures the controller operates only when the input voltage is above a specified level, preventing erratic operation.
7. Gate Driver Outputs: The device includes robust gate drivers for both main and synchronous switches, facilitating effective power conversion.
These features make the UCC2897APWR suitable for high-performance, efficient power supply designs.
Pinout
The UCC2897APWR is a Texas Instruments controller designed for use in isolated power supply applications. It comes in a 16-pin TSSOP (Thin Shrink Small Outline Package) with the following pin functions:
1. VDD: Supply voltage for the device.
2. VC: Control voltage for the gate drive.
3. OUT: Gate drive output for the power switch.
4. SW: Switch node used for sensing the switch current.
5. PGND: Power ground.
6. AGND: Analog ground.
7. FB: Feedback input for regulation control.
8. CS: Current sense input for over-current protection.
9. SS/ENA: Soft-start and enable control.
10. RT/CT: Timing components for setting the operating frequency.
11. SYNC: Synchronization input/output.
12. VREF: Reference voltage output.
13. VDD(2): Duplicate supply voltage pin.
14. VREF(2): Duplicate reference voltage pin.
15. GND(2): Duplicate ground pin.
16. NC: No connection.
These pins together manage the control functions required for efficient power conversion in various DC-DC converter applications, enhancing performance in terms of efficiency and reliability.
1. VDD: Supply voltage for the device.
2. VC: Control voltage for the gate drive.
3. OUT: Gate drive output for the power switch.
4. SW: Switch node used for sensing the switch current.
5. PGND: Power ground.
6. AGND: Analog ground.
7. FB: Feedback input for regulation control.
8. CS: Current sense input for over-current protection.
9. SS/ENA: Soft-start and enable control.
10. RT/CT: Timing components for setting the operating frequency.
11. SYNC: Synchronization input/output.
12. VREF: Reference voltage output.
13. VDD(2): Duplicate supply voltage pin.
14. VREF(2): Duplicate reference voltage pin.
15. GND(2): Duplicate ground pin.
16. NC: No connection.
These pins together manage the control functions required for efficient power conversion in various DC-DC converter applications, enhancing performance in terms of efficiency and reliability.
Manufacturer
The UCC2897APWR is manufactured by Texas Instruments Incorporated (TI). Texas Instruments is a global semiconductor company that designs and manufactures a wide range of analog and embedded processing chips. TI's products are used in various applications across industries such as automotive, industrial, personal electronics, communications equipment, and enterprise systems. The company is known for its innovation and development in semiconductor technology, providing solutions that enhance performance and efficiency in electronic devices.
Application
The UCC2897APWR is a PWM controller primarily used in power electronics applications. Its main application areas include isolated and non-isolated DC-DC converters, providing high efficiency and precise regulation. It's suitable for use in forward, flyback, and push-pull topologies. Common applications include telecommunications equipment, server power supplies, industrial power systems, and distributed power architectures. Its features, such as programmable slope compensation, current limit, and soft-start, make it versatile for various power supply designs requiring reliable and efficient power conversion.
Package
The UCC2897APWR is offered in a TSSOP-16 (Thin Shrink Small Outline Package) package. This package type is compact and suitable for surface-mount applications, providing effective thermal performance and ease of assembly in power supply designs.
