UCC28730
- Enables Zero-Power (<5 mW) standby consumption
- Smart Wake-Up detection enables smallest output capacitance
- Primary-side regulation (PSR) eliminates optocoupler
- ±5% voltage regulation and current regulation across line and load
- 700-V start-up switch
- 83-kHz maximum switching frequency enables low stand-by power charger designs
- Resonant-ring valley-switching operation for highest overall efficiency
- Frequency-dither to ease EMI compliance
- Clamped gate-drive output for MOSFET
- Overvoltage, low-line, and overcurrent protection functions
- Programmable cable compensation
- SOIC-7 package
The UCC28730 isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler, and wake-up signal detection to improve transient response to large load steps. A minimum switching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. The wake-up monitoring works with a secondary-side alarm device such as the UCC24650 to deliver rapid response to heavy load steps using minimal output capacitance.
An internal 700-V start-up switch, dynamically- controlled operating states and a tailored modulation profile support ultra-low stand-by power without sacrificing start-up time or output transient response. Control algorithms in the UCC28730 allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) operation with valley-switching reduces switching losses. Modulation of the switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | UCC28730 Zero-Power Standby PSR Flyback Controller With CVCC and Wake-Up Monitoring datasheet (Rev. A) | PDF | HTML | 2017/5/30 | ||
| Application brief | Flyback Selection Guide | PDF | HTML | 2022/6/23 | |||
| 應用說明 | Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips | PDF | HTML | 2021/8/31 | |||
| 更多文件說明 | Achieving High Power Density and Ultra Low Standby Power in Flyback Converters | 2021/3/23 | ||||
| 應用說明 | Minimize Standby Consumption for UCC287XX Family | 2019/8/1 | ||||
| 技術文章 | Get smarter about ‘zero’ standby power in your next appliance design | PDF | HTML | 2018/8/27 | |||
| 應用說明 | Troubleshooting TI PSR controllers | 2016/10/3 | ||||
| 技術文章 | Keeping up with the standards: Efficiency and standby power requirements | PDF | HTML | 2016/5/12 | |||
| 技術文章 | USB Wall Chargers: Conveniences and Challenges | PDF | HTML | 2015/10/6 | |||
| 白皮書 | Control Challenges for Low Power AC/DC Converters | 2015/10/2 | ||||
| 白皮書 | Control Challenges for Low Power AC/DC Converters (PPT) | 2015/10/2 |
設計與開發
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UCC28730EVM-552 — 具有 UCC24650 次級側邊喚醒的 UCC28730 初級側返馳控制器
UCC28730EVM-552 評估模組是一款 10-W 離線不連續模式 (DCM) 返馳式轉換器，可提供定電壓 (CV) 和定電流 (CC) 輸出穩壓，無需使用光學耦合器。 一次側控制器會偵測來自二次側壓降監控器 UCC24650 的喚醒訊號，以改善對大負載步進的瞬態回應。 EVM 展示 UCC28730 如何能以內部 700-V 啟動開關，動態控制操作狀態及量身打造的調變曲線，無需犧牲啟動時間或輸出瞬態回應。
SLUC579 — UCC28730 Design Calculator
許多 TI 參考設計包含 UCC28730
使用我們的參考設計選擇工具，以檢視並找出最適合您的應用和參數的設計。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 7 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。