UCG28824
- Integrated 750V GaN with 170mΩ Rds(on) option
- Dynamic QR/DCM/CCM modes of operation
- High power density: up to 500kHz switching frequency
- Enable low BoM cost by integration
- Remove auxiliary winding with self bias
- Integrated input and output voltage sensing
- Integrated current sense
- Integrated HV start-up
- Integrated X-cap discharge
- High efficiency and low EMI performance
- Ultra-low standby power: <30mW
- Frequency foldback and burst mode
- Valley locking
- Frequency dithering
- Switching slew rate control
- Comprehensive protection features
- Overtemperature protection
- Overvoltage protection
- Short-circuit protection
- Cycle-by-cycle current limit
- Two-level over power protection with LPS
- Brownin and brownout protection
- Open feedback protection
- Flexible configurability through external
resistors
- X-cap discharge and CCM mode disable
- Selectable switching slew rate
- Multiple clamping frequency settings
- Fault latch or auto-restart
- Maximum and minimum peak current ratio
- Dithering amplitude
UCG2882x is a high frequency, quasi-resonant flyback converter with a built-in 750V GaN high electron mobility transistor (HEMT) with as low as 170mΩ Rds(on) for AC to DC power conversion. The UCG2882x is designed for high power density applications, such as cell phone fast chargers and notebook adapters. The key feature of this device is the self-bias and auxless sensing scheme which eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.
The UCG2882x also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG2882x includes a full list of protections, such as brownin and brownout protection, SCP, OVP, OPP, LPS, OFB and OTP. The cycle-by-cycle current limit allows for fast response to the fault conditions to safeguard the system and improve the reliability. In a small 5 × 5mm package, the UCG2882x has dedicated configuration pins to offer more flexibility. Only resistors are needed to tune certain parameters for each system, enabling a platform design with a single device.
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 | UCG2882x Self-Biased High Frequency QR Flyback Converter With Integrated GaN datasheet (Rev. C) | PDF | HTML | 2025/12/2 | ||
| 應用說明 | Design a Fixed Output Voltage Flyback with the UCG2882x Family of Devices | PDF | HTML | 2025/7/15 |
設計與開發
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UCG28824EVM-124 — UCG28824 45W QR 返馳評估模組
UCG28824EVM-124 是 45W USB-C PD 評估模組 (EVM)，可用於評估適用於 AC/DC 轉換器、充電器、USB 壁式插座和其他應用的離線 GaN 整合式準諧振返馳轉接器。該 EVM 符合 CoC Tier 2 與 DoE Level 6 的效率要求。EVM 旨在供評估使用，而不是終端產品。UCG28824EVM-124 將 90VRMS 至 264VRMS 的輸入電壓，轉換為可選擇的 5VDC、9VDC、15VDC 或 20VDC USB-C PD 輸出電壓。此 EVM 也可配置為產生 5VDC 至 24VDC 範圍內的固定輸出電壓。EVM 的設計可針對 15VDC (...)
UCG28824-CALC — UCG28824 design calculator
PMP41184 — 適用於伺服器輔助電源、整合 GaN 的 48W 小巧 QR 返馳式參考設計
此參考設計為 48W小巧 DC/DC 輔助電源供應器，專為伺服器 PSU 應用所設計。此設計採用具有氮化鎵 (GaN) 電源開關的整合式返馳控制器。此設計運用小巧平面印刷電路板 (PCB) 變壓器，實現不到 10mm 的高度，滿足現代伺服器 PSU 應用的高功率密度需求。返馳式轉換器 UCG28824 內建 VCC 自我偏壓功能，因無需輔助繞組及相關的 VCC 整流電路，從而簡化了平面變壓器的 PCB 繞線設計。本電源供應器以 PFC 匯流排電壓作為輸入，並產生兩組隔離輸出（12V/3A、24V/0.1A）與一組非隔離輸出 (18V/0.5A)。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (REZ) | 12 | 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。