TOP245GN

AC DC Converters, Offline Switchers Overview

The TOP245GN is a high-voltage integrated switcher from the TOPSwitch-GX family, manufactured by Power Integrations. It combines a 700V MOSFET with a PWM controller and protection circuits in an SMD-8B package. The device supports universal AC input (85-265 VAC) and operates at a switching frequency of 132 kHz. It delivers up to 23 W output power for adapter applications and 33 W for open-frame designs at 230 VAC. Key electrical parameters include a maximum duty cycle of 83% and a quiescent supply current of 1.6 mA.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700V MOSFET with advanced PWM control and fault protection circuitry on a single silicon chip.
• Features EcoSmart technology for extremely low no-load power consumption in remote off modes.
• Includes fully integrated soft-start to minimize component stress and output voltage overshoot.
• Utilizes frequency jittering to reduce electromagnetic interference (EMI) and filtering costs.

AC DC Converters, Offline Switchers Applications

• Universal input AC/DC adapters
• Open-frame general-purpose power supplies
• Battery chargers for consumer electronics

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (e.g., TL) against the manufacturer's official datasheet to confirm tape-and-reel packaging requirements. Ensure the selected variant matches the required thermal performance and pinout configuration for the target PCB layout. Cross-reference RoHS compliance status with the latest product change notices.

AC DC Converters, Offline Switchers Selection Notes

Select the TOP245GN when designing flyback converters requiring outputs between 13 W and 33 W with universal input ranges. This SMD package is suitable for automated assembly processes where space constraints preclude through-hole options. Consider thermal dissipation requirements, as heatsink usage may be necessary above specific power thresholds depending on ambient conditions.

AC DC Converters, Offline Switchers Part Context

The TOP245GN belongs to the TOPSwitch-GX series, representing an evolution of the original TOPSwitch architecture. This family focuses on extending power capabilities while maintaining high integration levels. The GN designation specifically identifies the surface-mount SOIC-style package variant within the broader lineup that includes through-hole options like the YN and GN packages.

AC DC Converters, Offline Switchers Replacement Considerations

TOP245YN: Offers identical electrical functionality but utilizes a TO-220 through-hole package instead of the SMD format. Verify thermal management strategies differ due to package construction changes.