Overview
The UCC2818AD is a power factor correction (PFC) controller from Texas Instruments, designed to achieve near-unity power factor in power supply systems. This device is part of the UCC3817A/UCC3818A family and is fabricated using Texas Instruments' BiCMOS process. It is specifically tailored for active power factor corrected preregulators, shaping the AC input line current waveform to match the AC input line voltage, thereby reducing line distortion and ensuring stable, low-distortion sinusoidal line current through average current mode control.
The UCC2818AD is suitable for applications requiring a fixed supply (VCC) and is available in a 16-pin SOIC (D) package, operating over a temperature range of -40°C to 85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage (VCC) | 12 to 17 | V |
| Frequency Range | 6 kHz to 220 kHz | - |
| Start-Up Current | 150 µA (typical) | - |
| Gate Drive Current | ±1.2 A (peak) | - |
| VCC Turn-On Threshold | 10.2 V | - |
| VCC Turn-Off Threshold | 9.4 V | - |
Key Features
- Controls Boost Preregulator to Near-Unity Power Factor
- Limits Line Distortion
- World Wide Line Operation
- Overvoltage Protection
- Accurate Power Limiting
- Average Current Mode Control
- Improved Noise Immunity
- Improved Feed-Forward Line Regulation
- Leading Edge Modulation to reduce ripple current in the bulk capacitor
- Low-Power BiCMOS Operation
- Low start-up current of 150 µA (typical)
- Strong gate drive with ±1.2 A peak current capability
Applications
- PC Power Supplies
- Consumer Electronics
- Lighting Systems
- Industrial Power Supplies
- IEC6100-3-2 Compliant Supplies Less Than 300 W
Q & A
- What is the primary function of the UCC2818AD?
The UCC2818AD is a power factor correction (PFC) controller designed to achieve near-unity power factor in power supply systems.
- What is the operating temperature range of the UCC2818AD?
The UCC2818AD operates over a temperature range of -40°C to 85°C.
- What are the key features of the UCC2818AD?
Key features include near-unity power factor control, line distortion limitation, worldwide line operation, overvoltage protection, accurate power limiting, and improved noise immunity.
- What is the typical start-up current of the UCC2818AD?
The typical start-up current is 150 µA.
- What is the gate drive current capability of the UCC2818AD?
The gate drive current capability is ±1.2 A peak.
- What are the common applications of the UCC2818AD?
Common applications include PC power supplies, consumer electronics, lighting systems, industrial power supplies, and IEC6100-3-2 compliant supplies less than 300 W.
- What is the supply voltage range for the UCC2818AD?
The supply voltage range is 12 V to 17 V.
- What is the frequency range of the UCC2818AD?
The frequency range is 6 kHz to 220 kHz.
- What type of package is the UCC2818AD available in?
The UCC2818AD is available in a 16-pin SOIC (D) package.
- Does the UCC2818AD have overvoltage protection?
Yes, the UCC2818AD includes overvoltage protection.
- How does the UCC2818AD improve noise immunity?
The UCC2818AD improves noise immunity through its average current mode control and other design features.
