ADVANCED HIGH-POWER FACTOR PREREGULATOR

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TI

德州仪器

增强型高功率因数前置稳压器

The UC3854A/B products are pin compatibleenhanced versions of the UC3854. Like the UC3854, these products provide all of the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac input line current waveform to correspon • Controls Boost PWM to Near-Unity Power Factor\n• Limits Line Current Distortion To AC Offset (Eliminates External Resistor), 0 V to 5 V Multout Common-Mode Range\n• VREF GOOD Comparator\n• Faster and Improved Accuracy ENABLE Comparator \n• UVLO Options (16 V/10 V or 10.5 V/10 V)\n• 300-µA Start-Up;

TI

德州仪器