Specifications
| Attribute | Value |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Output Type | Transistor Driver |
| Output Configuration | Positive |
| Topology | Full-Bridge |
| Number of Outputs | 6 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 8V ~ 17V |
| Frequency - Switching | Up to 1MHz |
| Duty Cycle(Max) | 95% |
| Synchronous Rectifier | Yes |
| Clock Sync | Yes |
| Control Features | Enable, Frequency Control, Soft Start |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
Overview
Description
The UCC28951PWR is a Texas Instruments PWM controller designed for high-efficiency, full-bridge power converter applications. Operating with a phase-shifted, zero-voltage switching (ZVS) topology, it minimizes switching losses and improves efficiency, especially in high-voltage applications. The controller supports both voltage-mode and peak current-mode control, providing flexibility for various design needs.
Key features include adaptive delay control to optimize ZVS operation, programmable dead time, and synchronous rectifier control, which enhances performance by reducing conduction losses. The UCC28951PWR incorporates a range of protections and fault management functions, such as cycle-by-cycle current limiting, soft start, and over-temperature protection, ensuring robust and reliable operation.
Housed in a compact 16-pin TSSOP package, the UCC28951PWR is suitable for use in power supplies for telecom, server, and industrial applications. It supports a wide input voltage range and can be used to design efficient power converters for either isolated or non-isolated power supply designs.
Key features include adaptive delay control to optimize ZVS operation, programmable dead time, and synchronous rectifier control, which enhances performance by reducing conduction losses. The UCC28951PWR incorporates a range of protections and fault management functions, such as cycle-by-cycle current limiting, soft start, and over-temperature protection, ensuring robust and reliable operation.
Housed in a compact 16-pin TSSOP package, the UCC28951PWR is suitable for use in power supplies for telecom, server, and industrial applications. It supports a wide input voltage range and can be used to design efficient power converters for either isolated or non-isolated power supply designs.
Features
The UCC28951PWR is a phase-shifted full-bridge controller designed for DC/DC power conversion. Key features include:
1. Zero Voltage Switching (ZVS): Facilitates high efficiency by reducing switching losses.
2. Programmable Dead Time: Allows precise control over switching timing to optimize performance.
3. Advanced Current Mode Control: Provides enhanced response and stability.
4. Adaptive Delay: Improves efficiency across varying load conditions.
5. Integrated Fault Protection: Includes over-current, over-voltage, and thermal shutdown protections.
6. Synchronization Capability: Can synchronize with external clock signals for coherent operation.
7. High-Frequency Operation: Supports operation at a high frequency for compact power supply designs.
8. Feedback and Loop Compensation: Features input for error amplifier and loop compensation.
9. Soft Start: Reduces inrush current during start-up.
10. Efficiency and Power Density: Designed to enable high power density with efficient power conversion.
These features make the UCC28951PWR suitable for high-performance applications like server power supplies, telecommunications, and industrial power systems.
1. Zero Voltage Switching (ZVS): Facilitates high efficiency by reducing switching losses.
2. Programmable Dead Time: Allows precise control over switching timing to optimize performance.
3. Advanced Current Mode Control: Provides enhanced response and stability.
4. Adaptive Delay: Improves efficiency across varying load conditions.
5. Integrated Fault Protection: Includes over-current, over-voltage, and thermal shutdown protections.
6. Synchronization Capability: Can synchronize with external clock signals for coherent operation.
7. High-Frequency Operation: Supports operation at a high frequency for compact power supply designs.
8. Feedback and Loop Compensation: Features input for error amplifier and loop compensation.
9. Soft Start: Reduces inrush current during start-up.
10. Efficiency and Power Density: Designed to enable high power density with efficient power conversion.
These features make the UCC28951PWR suitable for high-performance applications like server power supplies, telecommunications, and industrial power systems.
Pinout
The UCC28951PWR is a Texas Instruments device designed for high-efficiency phase-shifted full-bridge converters. It comes in a 20-pin TSSOP (PW) package.
Here’s a concise summary of its pin count and functions:
1. VIN: Input supply voltage
2. GND: Ground
3. RSET: Sets switching frequency
4. RT/CT: Timing resistor/capacitor for oscillator
5. SYNC: Synchronization input/output
6. SS/EN: Soft-start and enable
7. COMP: Error amplifier output
8. FB: Feedback input for voltage regulation
9. CS: Current sense input
10. OUTA: High-side driver output for phase A
11. OUTB: Low-side driver output for phase A
12. OUTC: High-side driver output for phase B
13. OUTD: Low-side driver output for phase B
14. SR1: Synchronous rectifier control 1
15. SR2: Synchronous rectifier control 2
16. VREF: Voltage reference
17. EAO: Error amplifier output
18. RES: Reset
19. STK: Secondary-side drivers control
20. VCC: Supply voltage for control circuitry
This configuration helps in controlling power converters efficiently, with emphasis on synchronous rectification and reduced switching losses.
Here’s a concise summary of its pin count and functions:
1. VIN: Input supply voltage
2. GND: Ground
3. RSET: Sets switching frequency
4. RT/CT: Timing resistor/capacitor for oscillator
5. SYNC: Synchronization input/output
6. SS/EN: Soft-start and enable
7. COMP: Error amplifier output
8. FB: Feedback input for voltage regulation
9. CS: Current sense input
10. OUTA: High-side driver output for phase A
11. OUTB: Low-side driver output for phase A
12. OUTC: High-side driver output for phase B
13. OUTD: Low-side driver output for phase B
14. SR1: Synchronous rectifier control 1
15. SR2: Synchronous rectifier control 2
16. VREF: Voltage reference
17. EAO: Error amplifier output
18. RES: Reset
19. STK: Secondary-side drivers control
20. VCC: Supply voltage for control circuitry
This configuration helps in controlling power converters efficiently, with emphasis on synchronous rectification and reduced switching losses.
Manufacturer
The UCC28951PWR is manufactured by Texas Instruments, a multinational technology company. Texas Instruments is well-known for designing and manufacturing semiconductors and various integrated circuits, which are used in a wide array of electronic devices and systems. The company specializes in analog technology, embedded processing, and digital light processing (DLP) devices, among other areas. Texas Instruments serves a diverse range of industries, including automotive, industrial, personal electronics, communications equipment, and enterprise systems.
Application
The UCC28951PWR is a versatile active-clamp PWM controller designed for high-efficiency power supply applications. Key application areas include:
1. DC-DC Converters: Ideal for isolated DC-DC converters in server, telecom, and industrial power systems.
2. Switch Mode Power Supplies (SMPS): Used in designing efficient SMPS for various electronics.
3. Renewable Energy Systems: Supports applications in solar inverters and energy storage systems.
4. Electric Vehicle Chargers: Facilitates efficient power conversion in EV charging stations.
5. High-Density Power Systems: Suitable for compact power solutions in advanced computing and communications equipment.
Its features support high-frequency operations and improve overall energy efficiency, making it suitable for modern, eco-friendly power systems.
1. DC-DC Converters: Ideal for isolated DC-DC converters in server, telecom, and industrial power systems.
2. Switch Mode Power Supplies (SMPS): Used in designing efficient SMPS for various electronics.
3. Renewable Energy Systems: Supports applications in solar inverters and energy storage systems.
4. Electric Vehicle Chargers: Facilitates efficient power conversion in EV charging stations.
5. High-Density Power Systems: Suitable for compact power solutions in advanced computing and communications equipment.
Its features support high-frequency operations and improve overall energy efficiency, making it suitable for modern, eco-friendly power systems.
Package
The UCC28951PWR is a Texas Instruments controller for full-bridge power converters. It comes in a TSSOP-20 (Thin Shrink Small Outline Package) with PowerPAD, which provides enhanced thermal performance due to its exposed thermal pad, improving heat dissipation.
