Powerint LNK458KG 4.3W PFC LED驱动参考设计(DER297)
Powerint公司的4.3W PFC LED驱动器采用LinkSwitchTM-PL系列LNK458KG,主要用于B10替代灯. 115 VAC输入48V输出时的效率大于86%,115 VAC输入96V输出时的效率大于87%,功率因素大于0.95,THD小于15%,起动时间小于300ms.本文介绍了LED驱动参考设计主要优势以及输出48 V/90 mA, 48 V/ 60 mA和96 V/ 45 mA参考设计主要指标,电路图和相应的材料清单.
4.3 W Power Factor Corrected LED Driver (Non-Isolated Buck Boost) Using LinkSwitchTM-PL LNK458KG
This document is an engineering report describing a non-isolated LED driver (power supply) utilizing a LNK458KG from the LinkSwitch-PL family of devices.
The DER-297 provides a single constant current output with an output power of 4.5 W.
The board can be easily configured for output voltages from 35 V to 100 V as shown in the example table below.
The key design goals were high efficiency and small size, enabling the driver to fit into candelabra and B10 sized lamps and maximize efficacy.
The board was optimized to operate over the low AC input voltage range (85 VAC to 132 VAC, 47 Hz to 63 Hz). LinkSwitch-PL based designs provide a high power factor (>0.95) meeting current international requirements.
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