Overview
The UCC28065DR, produced by Texas Instruments, is a Natural Interleaving™ Transition-Mode Power Factor Correction (PFC) controller. This device is designed to support high-power applications with enhanced efficiency and reliability. It operates in transition mode, allowing for higher power ratings than traditional PFC controllers. The UCC28065DR features a unique Natural Interleaving technique, where both channels operate as masters synchronized to the same frequency, ensuring a 180-degree phase shift. This approach enhances response time, phase accuracy, and overall system efficiency.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Input Voltage | 14 | - | 21 | V |
| VCC Input Current | 8 | - | 18 | mA |
| VINAC Input Voltage | 0 | - | 6 | V |
| VREF Output Voltage | 5.82 | 6.00 | 6.18 | V |
| Switching Frequency | - | - | Up to 800 kHz | - |
| Junction-to-Ambient Thermal Resistance | - | - | 91.6 | °C/W |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- Input filter and output capacitor ripple-current reduction, enhancing system reliability and reducing bulk capacitor size.
- Support for higher switching frequencies up to 800 kHz, reducing boost inductor size.
- High light-load efficiency with user-adjustable phase management and burst mode operation.
- Sensorless current-shaping for simplified board layout and improved efficiency.
- Input line feed-forward for fast line transient response.
- Inrush-safe current limiting to prevent MOSFET conduction during inrush and eliminate CCM operation and reverse recovery events in the output rectifier.
- Advanced non-linear gain for rapid and smooth response to line and load transient events.
- Expanded system-level protections including input brownout and dropout recovery, output over-voltage, open-loop, overload, soft-start, phase-fail detection, and thermal shutdown.
Applications
- Slim AC/DC power supplies for LED and OLED TVs.
- All-in-one PCs.
- High-density AC/DC and gaming adapters.
- Home audio systems.
- Server, telecom, and DIN rail power supplies.
Q & A
- What is the primary function of the UCC28065DR?
The UCC28065DR is a Transition-Mode Power Factor Correction (PFC) controller designed to improve power efficiency and reliability in high-power applications.
- What is the Natural Interleaving technique used in the UCC28065DR?
The Natural Interleaving technique ensures that both channels operate as masters synchronized to the same frequency, maintaining a 180-degree phase shift for enhanced efficiency and response time.
- What are the key benefits of the high switching frequency support in the UCC28065DR?
The high switching frequency support up to 800 kHz reduces the size of the boost inductor and improves overall system efficiency, especially when using GaN or SiC MOSFETs.
- How does the UCC28065DR achieve high light-load efficiency?
The device achieves high light-load efficiency through burst mode operation and user-adjustable phase management, which helps in meeting standby power targets without turning off the PFC.
- What are the advanced protection features of the UCC28065DR?
The device includes protections such as input brownout and dropout recovery, output over-voltage, open-loop, overload, soft-start, phase-fail detection, and thermal shutdown.
- What is the operating temperature range of the UCC28065DR?
The operating temperature range is from -40°C to 125°C.
- What is the typical VREF output voltage of the UCC28065DR?
The typical VREF output voltage is 6.00 V.
- How does the UCC28065DR handle inrush current?
The device features inrush-safe current limiting to prevent MOSFET conduction during inrush and eliminate CCM operation and reverse recovery events in the output rectifier.
- What are some common applications of the UCC28065DR?
Common applications include slim AC/DC power supplies for LED and OLED TVs, all-in-one PCs, high-density AC/DC and gaming adapters, home audio systems, and server, telecom, and DIN rail power supplies.
- What is the junction-to-ambient thermal resistance of the UCC28065DR in the SOIC package?
The junction-to-ambient thermal resistance is 91.6 °C/W.
