UCC24624
- 230-V VD pins rating
- 23-ns turn-off delay to support LLC operating above resonant frequency and up to 625-kHz switching frequency
- Proportional gate drive to extend the SR conduction time
- Adjustable turn-off threshold for minimum body diode conduction
- Automatic standby mode detection with 180 µA of low standby current
- Wide 4.25-V to 26-V VDD operation range with internal clamp
- Adaptive turn-on delay for better DCM ring rejection
- Two-channel interlock to prevent shoot-through
- Integrated 1.5-A source and 4-A sink capability gate driver for N-channel MOSFETs
- 8-pin SOIC package
The UCC24624 high-performance synchronous rectifier (SR) controller is dedicated for LLC resonant converters to replace the lossy diode output rectifiers with SR MOSFETs and improve the overall system efficiency.
The UCC24624 SR controller uses drain-to-source voltage sensing method to achieve on and off control of the SR MOSFET. Proportional gate drive is implemented to extend the SR conduction time, minimize the body diode conduction time. To compensate for the offset voltage caused by the SR MOSFET parasitic inductance, the UCC24624 implements an adjustable positive turn-off threshold to accommodate different SR MOSFET packages. UCC24624 has a built-in 475-ns on-time blanking and a fixed 650-ns off-time blanking to avoid SR false turn-on and turn-off. UCC24624 also integrates a two-channel interlock function that prevents the two SRs from being on at the same time. With 230-V voltage-sensing pins and 28-V ABS maximum VDD rating, it can be directly used in converters with output voltage up to 24.75 V. The internal clamp allows the controller to support 36-V output voltage easily by adding an external current limiting resistor on VDD.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | UCC24624 Dual-Channel Synchronous Rectifier Controller for LLC Resonant Converters datasheet (Rev. C) | PDF | HTML | 2022年 2月 28日 |
| Technical article | 高頻共振轉換器設計考量，第 1 部分 | PDF | HTML | 2025年 8月 28日 | |
| White paper | Optimizing a Synchronous Rectification Scheme in CLLLC | PDF | HTML | 2024年 7月 23日 | |
| Technical article | 高頻共振轉換器設計考量，第 2 部分 | PDF | HTML | 2024年 3月 15日 | |
| Application note | Configs of Secondary Rectifier Circuit for LLC Resonant Converter Using UCC24624 | PDF | HTML | 2021年 12月 21日 | |
| Application note | Design Considerations With Dual-Channel SR Controller UCC24624 | 2020年 6月 4日 | ||
| Technical article | How to reduce audible noise and power consumption at standby in your AC/DC design | PDF | HTML | 2020年 4月 22日 | |
| Technical article | Three considerations for achieving high efficiency and reliability in industrial A | PDF | HTML | 2019年 4月 4日 | |
| Application note | Improving ZVS and efficiency in LLC converters | 2018年 11月 5日 | ||
| Application brief | Boosting LLC Resonant Converter Efficiency by Using the UCC24624 | 2018年 10月 23日 |
設計與開發
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PFCLLCSREVM034 — 具有 UCC28056B、UCC256404 和 UCC24624 的 AC 至隔離式 DC EVM
PFCLLCSREVM034 是一款 168 W AC/DC 電源，具備轉換模式功率因數校正前端和具同步整流功能的隔離式半橋 LLC 共振轉換器。此 EVM 可在 90 Vrms 至 264 Vrms 的 AC 輸入範圍內運作，並在 168 W 全負載輸出功率下輸出 12-V DC。
UCC24624EVM — UCC24624 LLC 驅動器評估模組
TIDA-010080 — 用於 5G 電信整流器的 500-W >94.5% 效率類比控制 AC/DC 參考設計
TIDA-010081 — 用於 5G 電信整流器的 >95% 效率、1 kW 類比控制 AC/DC 參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
訂購與品質
- 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
- 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。