FSD210B

AC DC Converters, Offline Switchers Overview

The FSD210B is a high-performance integrated Pulse Width Modulator (PWM) and Sense FET designed for off-line Switch Mode Power Supplies (SMPS). It combines a 700V LDMOS power switch with a voltage-mode PWM control block. Key electrical parameters include a fixed operating frequency of 134 kHz, an input voltage range supported by Under Voltage Lock Out (UVLO), and a thermal shutdown threshold. The device features internal soft start, pulse-by-pulse current limit, and auto-restart capabilities. It supports advanced burst-mode operation to minimize no-load power consumption below 0.1W at 265Vac.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700V Sense FET with a voltage-mode PWM controller on a single chip.
• Features advanced burst-mode operation for ultra-low no-load power consumption.
• Includes comprehensive protection mechanisms such as thermal shutdown and current limiting.

AC DC Converters, Offline Switchers Applications

• Flyback converters for offline power supplies
• Adapters and chargers
• Consumer electronics power systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'B' against the official onsemi datasheet to confirm pinout compatibility and electrical tolerances. Ensure the component meets the required automotive or industrial qualification standards if applicable. Cross-reference the marking code with the manufacturer's latest marking specification document to prevent counterfeit parts. Confirm package integrity upon receipt.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring minimal external components in flyback topologies. It eliminates the need for an auxiliary bias winding, reducing system complexity. Consider the 134 kHz fixed frequency for EMI filtering requirements. Evaluate the burst-mode efficiency benefits for applications demanding strict no-load power regulations.

AC DC Converters, Offline Switchers Part Context

The FSD210B belongs to the FSD200/FSD210 family of monolithic high-voltage power switching regulators. These devices are engineered to replace discrete MOSFET and controller solutions, offering reduced board space and improved reliability. The family is widely used in cost-effective SMPS designs where high integration and robust protection are critical.

AC DC Converters, Offline Switchers Replacement Considerations

The FSD200 is a compatible alternative within the same family but lacks the advanced burst-mode feature found in the FSD210 series. Verify that the absence of burst-mode operation aligns with your no-load power consumption requirements before substituting.