UCC3819A
- Controls Boost Preregulator to Near-Unity Power Factor
- 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
- 150-µA Typical Start-Up Current
- Low-Power BiCMOS Operation
- 10.8-V to 17-V Operation
- Programmable Output Voltage (Tracking Boost Topology)
The UCC2819A/UCC3819A provides all the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac-input line current waveform to correspond to that of the ac-input line voltage. Average current mode control maintains stable, low distortion sinusoidal line current.
Designed in Texas Instrument’s BiCMOS process, the UCC3819A offers new features such as lower start-up current, lower power dissipation, overvoltage protection, a shunt UVLO detect circuitry and a leading-edge modulation technique to reduce ripple current in the bulk capacitor.
The UCC3819A allows the output voltage to be programmed by bringing out the error amplifier noninverting input.
The UCC3819A is directly pin for pin compatible with the UCC3819. Only the output stage of UCC3819A has been modified to allow use of a smaller external gate drive resistor values. For some power supply designs where an adequately high enough gate drive resistor can not be used, the UCC3819A offers a more robust output stage at the cost of increasing the internal gate resistances. The gate drive of the UCC3819A remains strong at ±1.2 A of peak current capability.
Available in the 16-pin D, N, and PW packages.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | UCC2819A Power Factor Preregulator datasheet | 2003年 9月 9日 | |
| User guide | UCC3817 BiCMOS Power Factor Preregulator Evaluation Board (Rev. D) | 2014年 11月 13日 | ||
| Application note | Avoiding Audible Noise at Light Loads When Using Leading Edge Triggered PFC Con (Rev. C) | 2011年 4月 13日 | ||
| Application note | Startup Current transient of the Leading Edge Triggered PFC Controllers | 2004年 6月 30日 | ||
| Application note | UCC3817 Current Sense Transformer Evaluation | 2004年 2月 13日 | ||
| Application note | PFC Family Differences UCC3817A/18A/19A and UCC3817/18/19 | 2003年 8月 18日 | ||
| Application note | DN-66 UC3854A/B and UC3855A/B Provide Power Limiting with Sinusoidal Input (Rev. A) | 2001年 11月 6日 | ||
| Application note | Synchronizing a PFC Controller from a Down Stream Controller Gate Drive | 2000年 11月 3日 |
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