Onsemi FSL137MRIN: High-Performance GreenMode Power Switch for Efficient Low-Power SMPS Designs

The demand for energy-efficient, compact, and cost-effective power supplies continues to grow, particularly in applications such as auxiliary power for appliances, chargers, and industrial systems. Addressing this need, the onsemi FSL137MRIN integrates a high-voltage power MOSFET with a current-mode PWM controller and protection features into a single package. This integration simplifies design and reduces component count, making it an ideal solution for low-power switched-mode power supplies (SMPS).

A key feature of the FSL137MRIN is its GreenMode operation, which provides intermittent burst mode under light-load conditions. This technology significantly reduces standby power consumption, often bringing it below 100mW to meet stringent international energy efficiency standards. The device’s pulse-by-pulse current limiting ensures robust protection against overloads and short circuits, enhancing system reliability. Furthermore, built-in functions like over-temperature protection (OTP) and line under-voltage lockout (UVLO) safeguard the IC and the overall power supply from abnormal operating conditions.

The internal 700V avalanche-rugged MOSFET offers high durability against voltage spikes commonly encountered in universal mains applications (85VAC to 265VAC). This ruggedness minimizes the need for additional snubber circuits, contributing to a simpler and more economical bill of materials (BOM). The device operates at a fixed switching frequency with internal frequency jittering, which helps minimize electromagnetic interference (EMI) and eases compliance with regulatory standards.

Designers will appreciate the reduction in external components, which not only saves board space but also accelerates time-to-market. The FSL137MRIN is offered in a compact, electrically isolated package that improves thermal performance and simplifies safety certification.

ICGOOODFIND: The onsemi FSL137MRIN is a highly integrated, energy-efficient power switch that excels in simplifying the design of low-power SMPS. Its combination of high voltage capability, comprehensive protection features, and ultra-low standby consumption makes it a superior choice for modern green power applications.

Keywords:

GreenMode,

Low Power Consumption,

Integrated Power Switch,

SMPS Designs,

Burst Mode Operation