SG3548DW

Power Supply Controllers, Monitors Overview

The SG3548DW is a fixed-frequency switching regulator controller manufactured by Microchip Technology in a 16-pin SOIC package. It features an internal oscillator with timing capacitor control, error amplifiers, and a PWM comparator. The device includes a soft-start circuit, under-voltage lockout, and a shutdown pin for system protection. Key electrical parameters include a maximum supply voltage of 40 V, a reset delay time of 25 ms, and a threshold voltage of 2.5 V. It operates within a temperature range of 0°C to +85°C and utilizes open-collector outputs.

Power Supply Controllers, Monitors Feature Summary

• Integrated soft-start capability to limit inrush current during power-up sequences
• Built-in under-voltage lockout mechanism ensuring stable operation at low supply voltages
• Dedicated shutdown input pin for remote system control and fault management

Power Supply Controllers, Monitors Applications

• DC-DC converter designs requiring fixed-frequency regulation
• Power supply units with over-current and thermal protection requirements
• Industrial control systems utilizing robust switching regulator topologies

Power Supply Controllers, Monitors Procurement Notes

Verify the specific manufacturer datasheet revision and ordering suffixes to ensure compatibility with required packaging and temperature grades. Confirm that the SOIC-16 footprint matches the target PCB layout constraints. Cross-reference the component marking codes against official Microchip identification guides to authenticate the source and prevent counterfeit components from entering the supply chain.

Power Supply Controllers, Monitors Selection Notes

Select this controller when a fixed-frequency PWM architecture is preferred over variable frequency schemes. Ensure the external timing components support the desired switching frequency range. Verify that the open-collector output configuration aligns with the gate drive requirements of the selected power MOSFETs or IGBTs in the application circuit.

Power Supply Controllers, Monitors Part Context

This component belongs to the family of switching regulator controllers designed for versatile power conversion applications. It provides essential control functions including error amplification, pulse-width modulation, and system protection features. The design supports various transformer-coupled and non-isolated converter topologies commonly used in commercial and industrial electronics.

Power Supply Controllers, Monitors Replacement Considerations

Consult official Microchip documentation for direct cross-reference part numbers. Verify pin-to-pin compatibility and parameter equivalence before substituting.