UCC29950
- High Efficiency PFC and Half-Bridge Resonant LLC Combo Controller
- Continuous Conduction Mode (CCM) Boost Power Factor Correction
- Supports Self-Bias or Auxiliary (external) Bias Mode of Operation
- PFC Loops Fully Internally Compensated
- PFC Stage Design in 3 Easy Steps
(design voltage feedback, current feedback and power stage) - Fixed 100-kHz PFC Frequency with Dithering for Ease of EMI Compliance
- True Input Power Limit, Independent of Line Voltage
- Fixed LLC Frequency Operating Range of 70 kHz to 350 kHz
- Dead-Time Varied Across Load Range for LLC Half-Bridge Power Stage to Extend ZVS Range
- Three-Level LLC Over-Current Protection
- Hiccup Mode Operation for Continuous Overload and Short-Circuit Power Protection
- Low Standby Power Consumption Enabled by Active Control of High-Voltage Start-Up MOSFET and X-Cap Discharge Function
- Built In Soft-Start and Converter Sequencing to Simplify Design
- AC Line Brownout Protection, with Fail Indicator
- PFC Bus Over-Voltage and Under-Voltage Protection
- Over-Temperature Protection
- External Gate Drivers for Scalability with Power Level
- SOIC-16 Package
The UCC29950 provides all the control functionality for an AC-to-DC converter with a CCM boost Power Factor Correction (PFC) stage followed by an LLC converter stage. The controller is optimized to allow ease of use.
Proprietary CCM PFC algorithms enable the system to achieve high efficiency, smaller converter size with high power factor. The integrated LLC controller enables a high-efficiency DC-to-DC conversion stage utilizing soft switching for low EMI noise. Integration of PFC control and LLC control in a combo controller allows the control algorithms to take advantage of information from both stages.
The controller includes a control circuit for start-up using a Depletion Mode MOSFET with internal device power management that minimizes external component requirements and helps lower system implementation costs.
To further reduce the standby power an X-Cap discharge circuit is integrated. The UCC29950 implements a complete suite of system protection functions, including AC line brownout, PFC bus under voltage PFC and LLC, over current and thermal shutdown.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | UCC29950 CCM PFC and LLC Combo Controller datasheet (Rev. A) | PDF | HTML | 2015年 3月 20日 |
Technical article | Power Tips: Centralized control makes power supply design easier | PDF | HTML | 2015年 12月 18日 | |
EVM User's guide | Using the UCC29950EVM-631 300-W PFC/LLC Off-Line PSU Module (Rev. A) | 2015年 3月 11日 | ||
Application note | LLC Design for UCC29950 | 2015年 2月 16日 | ||
More literature | Designing an LLC Resonant Half-Bridge Power Converter | 2011年 7月 26日 |
設計與開發
如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。
PMP11303 — 高效率 350W AC/DC 電源參考設計
PMP30192 — 具有複合式 IC 的通用輸入、360W PFC + LLC 參考設計
PMP11237 — 具有單層 PCB 和 UCC29950 LLC+PFC 組合控制器的電源參考設計
TIDA-00520 — 300-W PFC 與諧振 LLC 半橋控制器離線 AC/DC PSU 模組
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
SOIC (D) | 16 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點