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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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 Family 750kHz Wide VIN /VOUT Range LLC Controller Optimized for Light-Load Efficiency datasheet (Rev. B) | PDF | HTML | 2026/1/21 | ||
| 應用說明 | Turn Ratio Correction Factor for Integrated Transformer LLC Design | PDF | HTML | 2026/7/9 | |||
| 應用說明 | FAQs on UCC25661x | PDF | HTML | 2026/6/18 | |||
| Application brief | 電池充電應用中的 LLC 諧振控制器：在廣泛輸出電壓範圍內實 現高效率 | PDF | HTML | PDF | HTML | 2026/6/12 | ||
| 白皮書 | High Efficiency by Leveraging GaN FET in an LLC Resonant Converter Design | PDF | HTML | 2025/9/24 | |||
| Product overview | UCC25661(-Q1) Selection Guide | PDF | HTML | 2025/9/4 | |||
| 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 | |
| 證書 | CB TEST CERTIFICATE US-43601-UL | 2024/3/28 | ||||
| 證書 | CB TEST CERTIFICATE US-43600-UL | 2024/3/28 |
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。
UCC25661X-CALC — UCC25661X Design Calculator
PMP23454 — 通用輸入、430W 電動工具充電器參考設計
PMP23488 — 540W 平面電視電源參考設計
本參考設計提供高度限制在 10mm 以內的平面電視電源設計資訊。本設計採用交錯式過渡模式 (TM) 功因修正 (PFC) 電路，並搭配兩塊可更換且基於平面變壓器設計的獨立 LLC 諧振子板。本參考設計的典型輸出功率為 300W，峰值輸出功率可達 540W。
PMP23558 — 使用 GaN 的 240W AC/DC PSU 參考設計
此參考設計為臨界導通模式升壓功率因數校正（PFC）與半橋 LLC 架構，可接受通用 AC 輸入，並產生隔離式 24V、10A 輸出。此設計在一次側採用 LMG3622 GaN 模組，內建驅動器與電流感測模擬功能，以提升整體效率。此設計可在 90Vac 輸入時實現 93.62% 的全負載效率。
PMP31276 — 288W PFC, LLC and bidirectional battery charger reference design
This reference design is an AC/DC battery-backup charger with two outputs: system and battery. A 4-SW bidirectional buck-boost charges the battery and supplies system load. An optional microcontroller disables main power sections, reducing stand-by power while collecting parameters for telemetry.
| 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。