TI UCC28730零待机功耗大功率AC－DC转换器解决方案
TI公司的UCC28730是提供恒压(CV)和恒流(CC)输出调整的隔离反激电源控制器,初级边调整(PSR)不需要光耦合器,而最低开关频率30Hz可使无负载的功耗小于5mW,电压和电流对火线电压和负载的调整度为±5%,700V起动开关,最大开关频率83kHz,主要用于智能手机,平板电脑的充电适配器,TV和监视器电源,家用电器和工业自动化开关电源(SMPS).本文介绍了UCC28730主要特性,功能框图,几种应用电路,以及评估板UCC28730EVM-552主要特性和指标,电路图,材料清单和PCB元件布局图.
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 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 monitoring works with a secondary-side alarm device such as the UCC24650 to deliver rapid response to heavy load steps using minimal output capacitance.
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