計算工具
UCC25661X-CALC — UCC25661X Design Calculator
The purpose of this tool is to aid in the design of the main power stage components of a LLC Resonant Converter along with component calculations using UCC25661x controller.
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
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| 重要文件 | 類型 | 標題 | 格式選項 | 日期 |
|---|---|---|---|---|
| * | Data sheet | UCC25661x-Q1 Family 750kHz Wide VIN /VOUT Range LLC Controller Optimized for Light-Load Efficiency datasheet (Rev. A) | PDF | HTML | 2025年 9月 4日 |
| Product overview | UCC25661(-Q1) Selection Guide | PDF | HTML | 2025年 9月 4日 | |
| Functional safety information | UCC25661x-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 2025年 7月 29日 | |
| Technical article | 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 | 2025年 5月 19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)。
開發板
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。
| 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
內含資訊：
- 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
- 進行中的可靠性監測
內含資訊：
- 晶圓廠位置
- 組裝地點
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。