UCC24612
- Supports Topologies such as Active Clamp Flyback, QR, DCM, CCM Flyback and LLC
- MOSFET VDS Sensing up to 230 V
- Operating Frequency Up to 1 MHz
- 1 MHz for UCC24612-1
- 800 kHz for UCC24612-2
- Wide VDD Range Allows for Direct Bias from 5-V to 28-V Output Systems
- 4-A Sink, 1-A Source Gate Driver with Proportional Gate Drive
- Adaptive Minimum Off-time for Increased Noise Immunity
- Cycle Limit Pre-Turn-off Improves Efficiency in CCM
- High or Low-Side Configurable
- Automatic Light-Load and Sleep-Mode Management with 320-µA standby current
- 16-ns Typical Turnoff Propagation Delay
- 9.5-V Gate Drive Clamp for Reduced Driving Loss
UCC24612 is a high performance synchronous rectifier controller and driver for standard and logic-level N-channel MOSFET power devices. By implementing a near-ideal diode emulation UCC24612 reduces losses of the output rectifier and indirectly the primary side losses. The drain to source (VDS) sensing control scheme allows UCC24612 to work with multiple topologies, such as Active Clamp Flyback, QR/DCM/CCM Flyback and LLC, et.
Integrated features simplify the design effort, enabling UCC24612 to excel in a variety of applications and frequencies. The wide operating VDD and VD voltage ranges enable simple implementation in systems with outputs up to 28 V. Efficiency and noise immunity is enhanced with adaptive minimum off-time. Variants UCC24612-1 and UCC24612-2 offer different minimum on-times to provide additional noise immunity. Robust operation in continuous conduction mode (CCM) is further enhanced with proportional gate-drive and CCM cycle limit pre-turn-off.
UCC24612 has multiple features that improve efficiency. The fast comparator with short propagation delays reduces switching loss. The 9.5-V gate drive clamp reduces MOSFET driving losses. Frequency dependent standby modes further decreases standby power. These features help UCC24612 be part of a greater system that meets stringent efficiency standards such as Department of Energy (DoE) Level VI and Code of Conduct (CoC) Tier 2.
UCC24612 is available in a SOT23-5 package.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | UCC24612 High Frequency Synchronous Rectifier Controller datasheet (Rev. A) | PDF | HTML | 2018年 2月 13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 | |
| More literature | PCB layout guidelines to optimize power supply performance | 2021年 3月 23日 | ||
| Technical article | Gain ultra-high power density for 100-W USB Power Delivery adapters | PDF | HTML | 2019年 3月 5日 | |
| Technical article | How topology selection can help improve reliability in industrial AC/DC power supp | PDF | HTML | 2019年 2月 14日 | |
| Technical article | Intelligently control an active clamp flyback | PDF | HTML | 2018年 3月 1日 | |
| Application note | UCC24610 and UCC24612 SR Range Extension Guide | 2017年 12月 18日 |
設計與開發
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UCC28780EVM-002 — 具有 Gan FET 的 UCC28780 主動鉗位返馳 45W AC/DC EVM
UCC28780EVM-002 展示使用 UCC28780 主動箝位返馳控制器，在額定 300kHz 高頻下使用 GaN MOSFET 功率 IC NV6115 和 NV6117，實現 45W 離線適配器的高效率和高密度。 EVM 也在二次側使用 UCC24612 同步整流器控制器。 在 90Vac 至 264Vac 的輸入電壓範圍內，輸出調節為 20Vdc。 UCC28780 控制器可在數種適應性模式下運作，以將整個線路和負載範圍的功率損耗降到最低。
UCC28780EVM-021 — 具有 UCC24612 和 Si MOSFET 的 UCC28780 主動鉗位反馳式轉換器 45W EVM
UCC28780EVM-021 是一款 45-W 評估模組 (EVM)，用於評估用於筆記型電腦充電和其他應用的離線主動箝位返馳式轉接器。該 EVM 符合 CoC Tier 2 與 DoE Level 6 的效率要求。它旨在用於評估目的，而不是最終產品。UCC28780EVM-021 可將 90-VRMS 至 264-VRMS 的輸入電壓向下轉換為 20-VDC，並具備 2.25-A 額定輸出電流額定值和 160-ms 過功率限制。此設計中使用的主要裝置為主動箝位返馳控制器 UCC28780，SR 控制器 UCC24612 及 Si MOSFET。
UCC24612-1EVM — 二次側同步整流器控制器二極體更換展示板
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 5 | 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。