TOP258GN

AC DC Converters, Offline Switchers Overview

The TOP258GN is an integrated AC-DC converter from the TopSwitch-HX family, designed for off-line power supplies. 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 supports multi-mode operation to maximize efficiency across all load ranges. Key electrical parameters include a maximum output power of 48 W, a switching frequency of 132 kHz, and a maximum duty cycle of 78%. It operates within a temperature range of -40 °C to +150 °C and features EcoSmart technology for low standby power consumption.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with high-voltage switching current source and PWM control circuitry on a single chip.
• Features multi-mode operation to maintain high efficiency at both light and heavy loads.
• Includes built-in thermal shutdown and fault protection mechanisms for enhanced reliability.
• Utilizes EcoSmart technology to achieve very low no-load power consumption.

AC DC Converters, Offline Switchers Applications

• Universal input AC-DC adapters
• Low-power offline switchers
• Consumer electronics power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix against official Power Integrations documentation to confirm package type and tape/reel specifications. Ensure the component matches the required RoHS compliance status and lead-free standards for your assembly process. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm current production status and availability constraints.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring a highly integrated solution with minimal external components. The 132 kHz switching frequency allows for smaller magnetic components compared to lower-frequency alternatives. Consider the thermal performance requirements given the integration density and ensure adequate heatsinking or PCB copper area for the chosen operating conditions.

AC DC Converters, Offline Switchers Part Context

The TOP258GN belongs to the TopSwitch-HX series by Power Integrations. This series is engineered for cost-effective, high-reliability power supplies. The GN suffix typically denotes a surface-mount package variant, specifically SMD-8C, distinguishing it from through-hole DIP or TO-220 packages found in other members of the same functional family.

AC DC Converters, Offline Switchers FAQ

What is the switching frequency of the TOP258GN?

The TOP258GN operates at a fixed switching frequency of 132 kHz.

Does the TOP258GN support multi-mode operation?

Yes, the device utilizes multi-mode operation to optimize efficiency across varying load conditions.