Texas Instruments UCC28730 零功耗待机 PSR 反激控制器
德州仪器 UCC28730 隔离式反激电源控制器无需使用光耦合器即可提供恒定电压 (CV) 和恒定电流 (CC) 输出稳压,并且具有唤醒信号检测功能,可改善大型负载阶跃瞬态相应。达 30Hz 的最小开关频率可促进实现低于 5mW 的无负载功耗。此器件可处理来自一次电源开关和一个二次反激式绕组的信息以实现对输出电压和电流的精确控制。唤醒监视功能可与 UCC24650 等二次侧报警器件搭配使用,只需最小输出电容即可快速响应大型负载阶跃。内部 700V 启动开关、动态控制的工作状态和一个定制的调制模式在不牺牲启动时间或输出瞬态响应的同时支持超低待机功耗。UCC28730 所使用的控制算法让运行效率达到或者超过适用标准。带有谷值开关的断续传导模式 (DCM) 降低了开关损耗。调制开关频率和初级侧峰值电流振幅(FM 和 AM)可在整个负载和线路范围内保持高转换效率。特性
- Enables Zero-Power (<5mW) 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
- 700V start-up switch
- 83kHz 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
应用
- Adapters and chargers for smartphones, tablets, and other consumer electronics
- TV and monitor power supplies
- SMPS for home appliances and industrial automation
- Standby and auxiliary power supplies
Functional Block Diagram
发布日期: 2015-03-10
| 更新日期: 2022-03-11
