UCC25661-Q1
- Full-load switching frequency: 50kHz to 750kHz
- IPPC control enables wide input and output LLC (WLLC) operation
- Enhanced light load
management:
- High-frequency pulse skip for improved light load efficiency
- Low-frequency burst for low standby power
- Audible frequency range skip for reduced audible noise
- Integrated PFC on/off control signal to help further reduce standby power (UCC256614-Q1)
- Internal resonant-capacitor voltage synthesizer for enhanced signal reliability and high start-up frequency support
- Zero current switching (ZCS) avoidance to eliminate capacitive region operation
- Adaptive soft start with minimized inrush current
- Integrated high-voltage start-up (UCC256612-Q1 and UCC256614-Q1)
- Integrated gate driver: +0.6A and –1.2A
- Complete protections
- Overcurrent protection (OCP): 50ns, cycle-by-cycle current limit
- Overvoltage protection (OVP), internal and external overtemperature protection (OTP)
- Input and VCCP UVLO with internal 19V VCCP Clamp
- Independently configured OCP and overload protection (OLP) (UCC256612-Q1, UCC256613-Q1, and UCC256614-Q1)
- SOIC-14 package with removed pins for high-voltage clearance
The UCC25661x-Q1 family is a high-frequency LLC controller that implements a input-power proportional control (IPPC) scheme, along with enhanced light-load management and multiple protection features.
IPPC widens the control range of the LLC converter and simplifies the design of wide input applications, such as high voltage to low voltage (HV-LV) redundant auxiliary, key-off, and bias isolated power supplies. IPPC simplifies the design of wide output applications, such as light electric vehicle battery chargers (scooters, mopeds, golf carts, and fork lifts).
The UCC25661x-Q1 family has enhanced light-load management that improves efficiency and minimizes audible noise. To minimize standby power in charger applications, the UCC25661x-Q1 family directly disables the PFC controller when operating in burst mode.
The automatic capacitive region avoidance scheme, along with the adaptive soft start with a reverse recovery avoidance scheme, establishes that the device never works in a mode where there is a potential to damage the FETs. Because of the automatic capacitive region avoidance scheme, the controller works best with a prebiased load.
The UCC25661x-Q1 family comes with robust protection for designing a reliable power supply. The UCC25661x-Q1 family has options supporting various features, see details in the Device Comparison table.
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 | UCC25661x-Q1 Family 750kHz Wide VIN /VOUT Range LLC Controller Optimized for Light-Load Efficiency datasheet (Rev. A) | PDF | HTML | 2025/9/4 | ||
| Product overview | UCC25661(-Q1) Selection Guide | PDF | HTML | 2025/9/4 | |||
| 功能安全資訊 | UCC25661x-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 2025/7/29 | |||
| 技術文章 | 幫助汽車設計師藉由 LLC 拓撲結構提升功率密度與系統可靠性 | PDF | HTML | Download English Version | PDF | HTML | 2025/5/19 |
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)。
UCC25661EVM-128 — UCC25661 評估模組
UCC25661 評估模組 (EVM) 可協助設計人員評估 UCC25661x LLC 諧振控制器（16 針腳 SOIC 封裝，移除部分針腳以符合高電壓間距要求）的運作與性能。此評估模組展示 UCC25661x 如何控制 LLC 諧振半橋式 DC-DC 轉換器，在整個負載與輸入電壓範圍內實現高效率。
UCC25660X-CALC — UCC25660X Design Calculator
UCC25661X-CALC — UCC25661X Design Calculator
PMP23464 — 通用輸入、500W 恆定定電流和恆定電壓電動自行車充電器參考設計
PMP31342 — 使用半橋 LLC 的車用 300W µDC/DC 轉換器參考設計
此車用 μDC/DC 轉換器參考設計展示非同步半橋電感-電感-電容 (LLC) 轉換器，其中包含使用 UCC256612-Q1 的 225V 至 450V 輸入電壓範圍。輸出電壓為 48V，最大負載電流為 6.25A。此設計可在關閉前低至 196V 的電壓運作。透過使用光電模擬器 ISOM8110-Q1 實現二次側穩壓。
PMP41106 — 通用輸入、500W 定電流和定電壓電動自行車充電器參考設計
此參考設計為適合電動自行車應用的通用輸入、48V、10.4A 恆定電流 (CC)、恆定電壓 (CV) 充電器。此參考設計以 110Vac 輸入達到 91.5% 端對端峰值效率，而 230Vac 輸入可達到 93.50% 端對端峰值效率。此設計包含風扇控制和根據輸出電流的充電狀態指示。此參考設計使用 UCC28180、UCC256603、UCC28910和 TL103W 裝置。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (DDB) | 14 | 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。