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
- Full-load switching frequency: 50kHz to 750kHz
- Input Power Proportional Control (IPPC) for wide LLC
- Enhanced light load management (standby power and audible noise):
- High frequency and audible frequency pulse skip
- Low frequency burst (all except UCC256616)
- Integrated PFC on/off (UCC256614)
- Soft in and out of burst mode (UCC256610)
- Internal resonant-capacitor voltage synthesizer for signal reliability and high frequency start-up
- Zero current switching (ZCS) avoidance to eliminate capacitive region operation
- Adaptive soft start with minimized inrush current and eliminating reverse recovery at start-up
- Integrated gate drive: +0.6/-1.2A
- Integrated high-voltage start-up (UCC25661x family except UCC256613)
- X-capacitor discharge (UCC256610, UCC256611, and UCC256614)
- Extended Gain Range (UCC256611 and UCC256614)
- 50ns overcurrent protection (OCP), cycle-by-cycle current limit
- Overvoltage protection (OVP), OVP latch (UCC256611 and UCC256616)
- Internal and external OTP
- Input and VCCP UVLO with internal 19V VCCP Clamp
- Independently configured OCP and overload protection (OLP/OPP) (UCC25661x family except UCC256616)
- SOIC-14 package with removed pins for high-voltage clearance
The UCC25661x family is a high-frequency LLC controller implementing 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 or output-voltage range applications such as LED drivers and battery chargers. IPPC works without a PFC for non-universal input applications.
The UCC25661x family has enhanced light-load management that improves the efficiency while minimizing audible noise. To minimize standby power, the UCC25661x family directly disables the PFC controller when operating in burst mode.
The automatic capacitive region avoidance scheme along with the adaptive soft start with reverse recovery avoidance scheme verifies that the device never works in a mode where there is a potential to damage the FETs. The automatic capacitive region avoidance scheme makes the controller appropriate for working with a prebiased load.
The UCC25661x family comes with robust protection to help users design a reliable power supply. The UCC25661x family has options supporting high-voltage start-up, X-capacitor (X-cap) discharge, OVP, and extended gain range (EGR). See details in the Device Comparison table.
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檢視所有 4 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | UCC25661x Family 750kHz Wide VIN /VOUT Range LLC Controller Optimized for Light-Load Efficiency datasheet (Rev. B) | PDF | HTML | 2026年 1月 21日 |
| White paper | High Efficiency by Leveraging GaN FET in an LLC Resonant Converter Design | PDF | HTML | 2025年 9月 24日 | |
| Product overview | UCC25661(-Q1) Selection Guide | PDF | HTML | 2025年 9月 4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。
參考設計
PMP23454 — 通用輸入、430W 電動工具充電器參考設計
此參考設計為適合電動工具應用的通用輸入、430W 定電流 (CC)、定電壓 (CV) 充電器。此參考設計在涓流充電模式下支援 0V 至 12.5V 的輸出電壓範圍，在全充電模式下支援 7.5V 至 22.5V 的輸出電壓範圍。已停用功率因數校正 (PFC)，且在涓流充電模式下，電感器-電感器電容器 (LLC) 會進入低功率模式，因此在 115Vac 時可達到 174mW 的無負載待機功率，在 230Vac 時則可達到 325mW。此參考設計使用 UCC28180、UCC256604、UCC24612、TL331 和 TPS7B8133 裝置。
Test report: PDF
| 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
- 進行中持續性的可靠性監測
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。