Overview
The UCC2818DWTRG4, produced by Texas Instruments, is a BiCMOS power factor correction (PFC) controller designed for active power factor-corrected preregulators. This controller is part of the UCCx817 and UCCx818 family, which provides all the necessary functions to achieve near-unity power factor by shaping the AC input line current waveform to correspond to the AC input line voltage. It operates using average current mode control, ensuring stable and low-distortion sinusoidal line current.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (DW) - 16 Pins |
| Operating Temperature Range | -40°C to 85°C |
| Start-Up Current | 150 µA (Typical) |
| Maximum Operating Voltage | Up to 18 V |
| Frequency Range | 6 kHz to 220 kHz |
| Current Amplifier Offset | ±2 mV |
Key Features
- Controls Boost Preregulator to Near-Unity Power Factor
- Limits Line Distortion
- World Wide Line Operation
- Over-Voltage Protection
- Accurate Power Limiting
- Average Current Mode Control
- Improved Noise Immunity
- Improved Feed-Forward Line Regulation
- Leading Edge Modulation to Reduce Ripple Current
- Low-Power BiCMOS Operation
Applications
The UCC2818DWTRG4 is suitable for use in active power factor correction (PFC) preregulators, particularly in AC-DC front-ends. It is ideal for universal AC input systems and can be used in a wide range of applications, including power supplies for consumer electronics, industrial equipment, and other devices requiring high power factor and low current distortion.
Q & A
- What is the primary function of the UCC2818DWTRG4?
The primary function of the UCC2818DWTRG4 is to provide active power factor correction (PFC) in AC-DC front-ends, achieving near-unity power factor and low current distortion.
- What is the operating temperature range of the UCC2818DWTRG4?
The operating temperature range is -40°C to 85°C.
- What is the typical start-up current of the UCC2818DWTRG4?
The typical start-up current is 150 µA.
- What is the maximum operating voltage of the UCC2818DWTRG4?
The maximum operating voltage is up to 18 V.
- What is the frequency range of the UCC2818DWTRG4?
The frequency range is 6 kHz to 220 kHz.
- Does the UCC2818DWTRG4 have overvoltage protection?
Yes, the UCC2818DWTRG4 includes overvoltage protection.
- What type of current mode control does the UCC2818DWTRG4 use?
The UCC2818DWTRG4 uses average current mode control.
- How does the UCC2818DWTRG4 reduce ripple current in the bulk capacitor?
The UCC2818DWTRG4 uses a leading-edge modulation technique to reduce ripple current in the bulk capacitor.
- What is the offset of the current amplifier in the UCC2818DWTRG4?
The current amplifier has a low offset of ±2 mV.
- In what types of applications is the UCC2818DWTRG4 commonly used?
The UCC2818DWTRG4 is commonly used in universal AC input systems, power supplies for consumer electronics, and industrial equipment.
