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.
space
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 | UCC24624 Dual-Channel Synchronous Rectifier Controller for LLC Resonant Converters datasheet (Rev. C) | PDF | HTML | 2022/2/28 | ||
| 技術文章 | 高頻共振轉換器設計考量，第 1 部分 | PDF | HTML | Download English Version | PDF | HTML | 2025/8/28 | |
| 白皮書 | Optimizing a Synchronous Rectification Scheme in CLLLC | PDF | HTML | 2024/7/23 | |||
| 技術文章 | 高頻共振轉換器設計考量，第 2 部分 | PDF | HTML | Download English Version | PDF | HTML | 2024/3/15 | |
| 應用說明 | Configs of Secondary Rectifier Circuit for LLC Resonant Converter Using UCC24624 | PDF | HTML | 2021/12/21 | |||
| 應用說明 | Design Considerations With Dual-Channel SR Controller UCC24624 | 2020/6/4 | ||||
| 技術文章 | How to reduce audible noise and power consumption at standby in your AC/DC design | PDF | HTML | 2020/4/22 | |||
| 技術文章 | Three considerations for achieving high efficiency and reliability in industrial A | PDF | HTML | 2019/4/4 | |||
| 應用說明 | Improving ZVS and efficiency in LLC converters | 2018/11/5 | ||||
| Application brief | Boosting LLC Resonant Converter Efficiency by Using the UCC24624 | 2018/10/23 |
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)。
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
PMP21683 — 48-V/550-W 共振轉換器參考設計
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.
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
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。