UCC24630
- Secondary-Side SR Controller Optimized for 5-V to 24-V Flyback Systems
- Operating Frequency Up to 200 kHz
- Volt-Second Balance SR On-Time Control
- Minimize Effect of MOSFET Device and Layout Inductance
- CCM Operation Compatibility
- Compatible with PSR and SSR Control
- Auto Low-Power Detect and 110-µA Standby Mode Current
- Wide VDD Range from 3.6 V to 28 V
- Rail-to-Rail Gate Driver with 13-V Clamp
- Open and Short Pin Fault Protection
The UCC24630 SR controller is a high-performance controller and driver for N-channel MOSFET power devices used for secondary-side synchronous rectification.
The combination of controller and MOSFET emulates a near-ideal diode rectifier. This solution not only directly reduces power dissipation of the rectifier but also reduces primary-side losses as well, due to compounding of efficiency gains.
Utilizing a volt-second balancing control method, the UCC24630 is ideal for flyback power supplies over a wide-output voltage range since the device is not connected directly to the MOSFET drain. The SR drive turn-off threshold is not dependent on the MOSFET RDS(on) which allows optimizing for maximum conduction time. Also secondary current ringing due to device and layout inductance does not affect the SR turn-off threshold.
The UCC24630 controller offers a programmable false-trigger filter, a frequency detector to automatically switch to standby mode during low power conditions and pin fault protections. The UCC24630 is compatible with DCM, TM and CCM operation.
The wide VDD operating range, wide programming range of the VPC voltage and blanking time, allows use in a variety of flyback converter designs.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | UCC24630 Synchronous Rectifier Controller With Ultra-Low-Standby Current datasheet (Rev. A) | PDF | HTML | 2015年 3月 30日 |
| Application note | UCC24630 and UCC24636 SR-Control Configurations Guide | 2017年 12月 18日 | ||
| Technical article | Achieving low standby power and high efficiency in flyback converters | PDF | HTML | 2015年 7月 27日 |
設計與開發
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UCC24630EVM-636 — UCC24630 65W AC/DC 變壓器
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參考設計的主要亮點為：
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- (...)
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此參考設計的主要亮點為：
- 減少元件數量設計，達到 NEC 2 類與限功率電源 (LPS) 規範
- 符合能源之星評級和 2013 歐盟生態設計指令能源相關產品 (ErP) 第 6 批次
- 符合嚴格的電流 (...)
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PMP10974 — 具有超過 89% 平均效率的通用 AC 輸入 5V/10A/50W PSR 返馳電源供應參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 6 | 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。