UCC28730
- Enables Zero-Power (<5 mW) standby consumption
- Smart Wake-Up detection enables smallest output capacitance
- Primary-side regulation (PSR) eliminates optocoupler
- ±5% voltage regulation and current regulation across line and load
- 700-V start-up switch
- 83-kHz maximum switching frequency enables low stand-by power charger designs
- Resonant-ring valley-switching operation for highest overall efficiency
- Frequency-dither to ease EMI compliance
- Clamped gate-drive output for MOSFET
- Overvoltage, low-line, and overcurrent protection functions
- Programmable cable compensation
- SOIC-7 package
The UCC28730 isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler, and wake-up signal detection to improve transient response to large load steps. A minimum switching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. The wake-up monitoring works with a secondary-side alarm device such as the UCC24650 to deliver rapid response to heavy load steps using minimal output capacitance.
An internal 700-V start-up switch, dynamically- controlled operating states and a tailored modulation profile support ultra-low stand-by power without sacrificing start-up time or output transient response. Control algorithms in the UCC28730 allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) operation with valley-switching reduces switching losses. Modulation of the switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
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功能优于比较器件，可直接替换。
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | UCC28730 Zero-Power Standby PSR Flyback Controller With CVCC and Wake-Up Monitoring 数据表 (Rev. A) | PDF | HTML | 2017-5-30 | ||
| 应用简报 | Flyback Selection Guide | PDF | HTML | 2022-6-23 | |||
| 应用手册 | Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips | PDF | HTML | 2021-8-31 | |||
| 更多文献资料 | Achieving High Power Density and Ultra Low Standby Power in Flyback Converters | 2021-3-23 | ||||
| 应用手册 | Minimize Standby Consumption for UCC287XX Family | 2019-8-1 | ||||
| 技术文章 | Get smarter about ‘zero’ standby power in your next appliance design | PDF | HTML | 2018-8-27 | |||
| 应用手册 | Troubleshooting TI PSR controllers | 2016-10-3 | ||||
| 技术文章 | Keeping up with the standards: Efficiency and standby power requirements | PDF | HTML | 2016-5-12 | |||
| 技术文章 | USB Wall Chargers: Conveniences and Challenges | PDF | HTML | 2015-10-6 | |||
| 白皮书 | Control Challenges for Low Power AC/DC Converters | 2015-10-2 | ||||
| 白皮书 | Control Challenges for Low Power AC/DC Converters (PPT) | 2015-10-2 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
UCC28730EVM-552 — UCC28730 具有 UCC24650 二次侧唤醒功能的一次侧反激控制器
UCC28730EVM-552 评估模块是一种 10W 离线不连续模式 (DCM) 反激式转换器，无需使用光耦合器即可提供恒定电压 (CV) 和恒定电流 (CC) 输出调节。 初级侧控制器检测来自次级侧压降监测器 UCC24650 的唤醒信号，用于改善面对大型负载阶跃的瞬态响应。 此 EVM 展示了 UCC28730 如何凭借内部 700V 启动开关、动态控制的工作状态以及量身定制的调制模式来提供超低待机功耗，而无需牺牲启动时间或输出瞬态响应。
SLUC579 — UCC28730 Design Calculator
许多 TI 参考设计都包括 UCC28730
通过我们的参考设计选择工具来审查并确定最适用于您应用和参数的设计。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| SOIC (D) | 7 | Ultra Librarian |
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