UCC24636
- Secondary-Side SR Controller Optimized for
5-V to 24-V Output Discontinuous/Transition Mode
Only Flyback Converters - Volt-Second Balance Control Enables Highest
Rectifier Efficiency - Compatible with PSR and SSR Flyback
Controllers - Ultra Low 110-µA Standby Current Consumption
- Auto-Detect Standby Mode Disables SR Switching
for Lower No-Load
Power Consumption - SR Turn-Off Independent of RDSON and Parasitic
Inductance - Operating Frequency Up to 130 kHz
- Wide VDD Range from 3.6 V to 28 V
- Adaptive Gate Drive Clamp
- Open and Short Pin Fault Protection
The UCC24636 SR is a compact, 6-pin secondary-side synchronous rectifier MOSFET controller and driver for high efficiency Flyback converters operating in Discontinuous (DCM) and Transition mode (TM). Unlike traditional SR controllers which measure the SR MOSFET drain voltage, UCC24636 implements a volt-second balance control method to determine the turn off transition of the SR MOSFET; hence, SR conduction time is independent of the MOSFET RDSON, parasitic inductance or ringing allowing flexibility to designers in component slelction and PCB layout. This control method enables maximum SR conduction time and highest rectifier efficiency for a given MOSFET.
The controller has built in intelligence to detect converter no load operation and automatically enters standby mode. While in standby mode, it disables the SR MOSFET and lowers its bias supply current to 110µA to further reduce overall system standby power consumption. The wide VDD operating range for the controller allows direct bias from the converter output for fixed or variable output voltage designs. This eliminates the need for an auxilliary winding on the main transformer, which simplifies the circuit design and reduces the cost.
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 | UCC24636 Synchronous Rectifier (SR) Controller With Ultra-Low Standby Current datasheet (Rev. A) | PDF | HTML | 2016/3/11 | ||
| 應用說明 | UCC24630 and UCC24636 SR-Control Configurations Guide | 2017/12/18 | ||||
| 應用說明 | Design UCC28704 With UCC24636 (PSR+SR) | 2017/1/12 | ||||
| 技術文章 | Biasing an SR controller IC in USB smartphone charging applications | PDF | HTML | 2016/12/8 | |||
| 技術文章 | USB chargers then and now: Type-C meets energy efficiency standards | PDF | HTML | 2016/9/23 | |||
| 類比設計期刊 | Agency requirements for stand-by power consumption w/ offline and PoL converters | 2016/1/26 |
設計與開發
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UCC24636EVM — UCC24636 同步整流器子板/評估模組
SLUC604 — UCC24636 Design Calculator
許多 TI 參考設計包含 UCC24636
使用我們的參考設計選擇工具，以檢視並找出最適合您的應用和參數的設計。
| 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
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。