CAP300DG-TL

Specialized ICS Overview

The CAP300DG-TL is a CapZero™-3 family automatic X capacitor rapid discharge IC manufactured by Power Integrations. It features a 1000 V breakdown voltage and supports total X capacitance from 200 nF to 6 mF with a minimum series resistance of 54 kW. The device operates in an SO-8 package (D Package) with a width of 3.90 mm, providing over 4 mm creepage distance. It consumes less than 5 mW at 230 VAC when AC is present and automatically discharges capacitors below 34 V upon AC removal. Operating temperature ranges from -20 °C to 105 °C.

Specialized ICS Feature Summary

• Automatic X capacitor discharge with <5 mW consumption at 230 VAC
• 1000 V internal MOSFET breakdown voltage for high surge withstand
• Supports X capacitance values from 200 nF up to 6 mF
• SO-8 package provides >4 mm creepage clearance

Specialized ICS Applications

• AC-DC converters requiring ErP Lot 6 compliance
• Adapters requiring ultra-low no-load consumption
• Systems needing lossless zero crossing signal generation

Specialized ICS Procurement Notes

Verify the component matches the CapZero™-3 family specifications, specifically the 1000 V rating and 200 nF to 6 mF capacitance range. Confirm the package is the standard SO-8 (D Package) and that the suffix TL indicates Tape & Reel packaging containing 2.5 k pieces. Ensure RoHS compliance and halogen-free status are required for the application.

Specialized ICS Selection Notes

Select external resistors R1 and R2 such that their total value is equal to or greater than 54 kW to meet safety discharge requirements. Distribute power dissipation across multiple discrete resistors if necessary during fault conditions. Ensure the MOV placement aligns with the system's differential surge voltage specifications, ideally using MOVPOS1 for surges exceeding 1.5 kV.

Specialized ICS Part Context

The CAP300DG belongs to the CapZero™-3 series, designed to eliminate standby power loss associated with traditional X capacitor discharge resistors. Unlike previous generations, it blocks current flow during AC operation while maintaining safety standards. The device simplifies design by removing the need for external bias supplies and offering high common-mode surge immunity without an external ground connection.

Specialized ICS Replacement Considerations

Direct replacements within the CapZero™-3 family include CAP200DG (800 V), CAP100DG (600 V), and CAP002/004/005/016/018 variants (825 V or 1000 V). Selection depends on matching the specific X capacitance range and required breakdown voltage for the target EMI filter configuration.