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ES1J Datenblatt(PDF) 3 Page - Fairchild Semiconductor |
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ES1J Datenblatt(HTML) 3 Page - Fairchild Semiconductor |
3 / 30 page www.fairchildsemi.com © 2010 Fairchild Semiconductor Corporation 3 FEB279_FAN9611/12 • Rev. 0.0.2 The following user guide supports the FAN9611/12 400W evaluation board for interleaved boundary-conduction-mode power-factor-corrected supply. It should be used in conjunction with the FAN9611/12 datasheet as well as the Fairchild application note AN-6086 Design Considerations for Interleaved Boundary-Conduction Mode PFC using FAN9612. Although marked FAN9612, the evaluation board can be interchangeably used to evaluate either the FAN9611 (10V turn-on threshold) or FAN9612 controller (12.5V turn-on threshold). Please visit Fairchild’s website at www.fairchildsemi.com for additional information. 1. Overview of the Evaluation Board The FAN9611/12 interleaved dual Boundary-Conduction-Mode (BCM) Power-Factor- Correction (PFC) controllers operate two parallel-connected boost power trains 180º out of phase. Interleaving extends the maximum practical power level of the control technique from about 300W to greater than 800W. Unlike the continuous conduction mode (CCM) technique often used at higher power levels, BCM offers inherent zero- current switching of the boost diodes (no reverse-recovery losses), which permits the use of less expensive diodes without sacrificing efficiency. Furthermore, the input and output filters can be smaller due to ripple current cancellation between the power trains and doubling of effective switching frequency. The advanced line feedforward with peak detection circuit minimizes the output voltage variation during line transients. To guarantee stable operation with less switching loss at light load, the maximum switching frequency is clamped at 525kHz. Synchronization is maintained under all operating conditions. Protection functions include output over-voltage, over-current, open-feedback, under- voltage lockout, brownout, and redundant latching over-voltage protection. The FAN9611/12 is available in a lead-free 16-lead SOIC package. This FAN9611/12 evaluation board is a four-layer board designed for 400W (400V/1A) rated power. Thanks to the phase management, the efficiency is maintained above 96% at low-line and high-line, even down to 10% of the rated output power. Efficiency is 96.4% at line voltage 115VAC and 98.2% at 230VAC under full-load conditions. |
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