PLC810PG Power Integrations

PLC810PG HiperPLC Family Continuous Mode PFC & LLC Controller with Integrated Half-bridge Drivers Product Highlights transformer. The PFC section of the PLC810PG is a universal input continuous current mode (CCM) design that does not Features require a sinusoidal input reference, thereby reducing system Highly integrated, eliminates external components cost and external components. Frequency and phase synchronized PFC and LLC Reduced noise and EMI The DC-DC controller drives an LLC resonant topology. This Ripple current reduction in PFC output capacitor variable frequency controller provides high efficiency by Edge collision-avoidance simplifies layout switching the power MOSFETs at zero voltage, eliminating most Comprehensive PFC and LLC fault handling and current limiting switching losses. The LLC controller is built around a current Proprietary continuous conduction mode PFC for high controlled oscillator with a control range selected to support efficiency with low component cost the traditional frequency of operation found in televisions. High efficiency Zero Voltage Switching (ZVS) LLC Off-time PFC control eliminates AC input sensing components To ensure zero voltage switching, the dead time of the LLC Configurable, precise dead time control and frequency limit switching in the PLC810PG is tightly toleranced and can be Prevents hard MOSFET switching adjusted with an external resistor. The highside/lowside duty Tight LLC duty cycle symmetry for balanced O/P diode currents cycle is also closely matched to provide balanced output Lead and halogen free Green package currents reducing output diode cost. Applications A typical PLC810PG LLC design operates at 100 kHz (under 32 to 60 LCD TV power supplies nominal conditions). Depending on the LLC circuit design, the Off-line 150 W to 600 W efficiency-optimized power supplies switching frequency can vary from half to three times the nominal LED street lighting operating frequency as a result of line and load changes. Description The PFC converter is frequency locked to the LLC to minimize The PLC810PG is a combined PFC and LLC off-line controller noise and electromagnetic interference. Increasing the PFC with integrated high voltage half-bridge drivers. Figure 1 shows frequency in synchronization with the LLC at light loads a simplified schematic of a PLC810PG based power supply reduces the current at which the PFC boost converter where the LLC resonant inductor is integrated into the Standby VCCHB GATEH Supply HB + AC VCCL IN DC VCC GATEL OUT ISP ISL FBP VREF PLC810PG PFC Gate GATEP Driver FMAX VCOMP FBL LLC Feedback Circuit GNDP GND GNDL Link PI-5044a-121708 Figure 1. Typical Application Circuit LCD TV Power Supply. www.powerint.com August 2009PLC810PG becomes discontinuous improving light load operation and reducing power line harmonics. PFC and LLC primary side fault management is provided. The phase of the PFC PWM output is dynamically adjusted relative to the LLC phase such that the switching edges do not coincide with noise sensitive events in the PWM and LLC timing circuits. This edge-collision avoidance technology simplifies power supply layout and improves performance. Phase synchronization reduces EMI spectral components and reduces ripple current in the PFC capacitor. 2 Rev. F 08/09 www.powerint.com