TI UCC2871x系列50W马达驱动电源参考设计
TI公司的UCC2871x系列是反激电源控制器,不需要光耦就能提供隔离的输出恒压(CV)和恒流(CC)稳压器,精度±5%,内部集成了700V起动开关,动态控制工作状态,支持超低待机功耗,主要用于电动自行车和电动摩托车以及智能电表.本文介绍了UCC2871x系列主要特性,功能框图,应用电路图和5W USB适配器电路图,以及马达变速驱动拓扑图,50W马达驱动电源参考设计主要特性,电路图,材料清单和PCB设计图.
The UCC2871x family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.
An internal 700-V start-up switch, dynamically-controlled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response.
Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of 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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