Poweint PLC810PG 150W LED街灯照明设计方案

Powerint 公司的PLC810PG 是集成了半桥驱动器的PFC和LLC离线控制器,其中的PFC部分是通用输入连续电流模式(CCM),不需要正弦输入参考,从而降低成本和外接元件.主要应用32-60吋LCD TV电源,150-600W电源和LED街灯照明.本文介绍PLC810PG主要特性, 方框图, 150W LED街灯照明设计DER-212主要特性和指标, PLC810PG LED 街灯照明电源输入电路和PFC功率级, PFC控制输入电路和LLC级以及所用材料清单(BOM).
DER-212:150 W Power Factor Corrected LLC Power Supply Using HiperPLC (PLC810PG)
The PLC810PG is a combined PFC and LLC off-line controller with integrated high voltage half-bridge drivers. Figure 1 shows a simplified schematic of a PLC810PG based power supply where the LLC resonant inductor is integrated into the transformer. The PFC section of the PLC810PG is a universal input continuous current mode (CCM) design that does not require a sinusoidal input reference, thereby reducing system cost and external components.
The DC-DC controller drives an LLC resonant topology. This variable frequency controller provides high efficiency by switching the power MOSFETs at zero voltage, eliminating most switching losses. The LLC controller is built around a current controlled oscillator with a control range selected to support the traditional frequency of operation found in televisions.
To ensure zero voltage switching, the dead time of the LLC switching in the PLC810PG is tightly toleranced and can be adjusted with an external resistor. The highside/lowside duty cycle is also closely matched to provide balanced output currents reducing output diode cost.
A typical PLC810PG LLC design operates at 100 kHz (under nominal conditions). Depending on the LLC circuit design, the switching frequency can vary from half to three times the nominal operating frequency as a result of line and load changes.
The PFC converter is frequency locked to the LLC to minimize noise and electromagnetic interference. Increasing the PFC frequency in synchronization with the LLC at light loads reduces the current at wh...