TOP257PG

AC DC Converters, Offline Switchers Overview

The TOP257PG is an AC-DC converter from the TOPSwitch-HX family by Power Integrations. It integrates a 700 V power MOSFET, high-voltage switching current source, PWM controller, oscillator, thermal shutdown circuit, and fault protection on a single monolithic chip. The device features frequency jittering to reduce EMI and EcoSmart® technology for low standby/empty load power consumption. It operates with a switching frequency of 66 kHz and supports a maximum duty cycle of 78%. Rated for 41 W output power, it functions within a temperature range of -40 °C to 150 °C TJ.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with high-voltage switching current source and PWM controller
• Includes built-in thermal shutdown circuit and comprehensive fault protection mechanisms
• Features frequency jittering capability to minimize electromagnetic interference emissions
• Utilizes EcoSmart® technology to achieve ultra-low standby and empty load power consumption

AC DC Converters, Offline Switchers Applications

• Universal input offline switcher designs
• Adapters and chargers requiring low height profiles
• General purpose AC-DC conversion systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix against official documentation to confirm package type and pin configuration. Ensure the selected variant matches the required thermal and electrical specifications for the target application environment. Cross-reference datasheet parameters with design requirements before procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring integrated off-line switching with advanced protection features. Consider the 700 V breakdown voltage and 41 W power rating for suitable load requirements. Evaluate the DIP-8 or eSIP package options based on thermal management needs and board space constraints.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TOPSwitch-HX family, which offers enhanced EcoSmart™ performance and extended power ranges. The family provides multi-mode operation to maximize efficiency across all loads. It includes new eSIP packages designed for low thermal impedance and simple mounting solutions.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution lists for verified alternatives. Generic replacements may not match the integrated feature set or thermal characteristics.