مدار مجتمع (آی سی) آی سی‌کاربرد ویژه

Product Attributes

Introduction

When AC voltage is applied, CAP300DG blocks current fow in the X capacitor safety discharge resistors, reducing the power loss to less than 5 mW, or essentially zero at 230 VAC. When AC voltage is disconnected, CAP300DG automatically discharges the X capacitor by connecting the series discharge resistors. This operation allows total fexibility in the choice of the X capacitor to optimize diferential mode EMI fltering and reduce inductor costs, with no change in power consumption. Designing with CAP300DG is simply a matter of selecting the appropriate external resistor values for the X capacitor value being used to achieve the necessary time constant. The simplicity and ruggedness of the two terminal CAP300DG IC makes it an ideal choice in systems designed to meet ErP Lot 6 requirements.

Features

• Provides lossless ZC (Zero Crossing) signal to system MCU
• Meets IEC 60335 X capacitor discharge of < 34 V in < 1 sec
• One part to cover X capacitor values up to 6 μF
• Blocks current through X capacitor discharge resistors when AC voltage is connected
• Automatically discharges X capacitors through discharge resistors when AC is disconnected
• Simplifes EMI flter design – larger X capacitor allows smaller inductive components with no change in consumption
• Only two terminals – meets safety standards for use before or after system input fuse > 4 mm creepage on package and PCB
• Self supplied – no external bias required
• High common mode surge immunity – no external ground connection
• High diferential surge withstand – 1000 V internal MOSFETs
• NEMKO and CB certifcation
• < 5 mW consumption at 230 VAC for all X capacitor values

Applications

• All AC-DC converters with X capacitors of 100 nF up to 6 μF
• Appliances requiring ErP Lot 6 compliance
• Adapters requiring ultra low no-load consumption
• All converters requiring very low standby power
• Lossless generation of zero crossing signal