SI9118DY-E3

DC DC Switching Controllers Overview

The SI9118DY-E3 is a programmable duty cycle switching controller manufactured by Vishay Siliconix. It supports Flyback, Forward, and Push-Pull topologies for isolated or non-isolated DC-DC conversion. The device operates with a fixed switching frequency of 1 MHz and features a maximum duty cycle of 80 percent. It accepts an operating supply voltage range from 10 V to 16.5 V. The component provides a regulated output voltage of 11.5 V and delivers an output current capability of 500 mA. It utilizes a SOIC-Narrow-16 surface-mount package and functions within a temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Supports multiple converter topologies including Flyback, Forward, and Push-Pull configurations.
• Features programmable duty cycle control with a maximum limit of 80 percent.
• Operates at a high switching frequency of 1 MHz for compact passive design.

DC DC Switching Controllers Applications

• Telecommunications power supplies
• Industrial point-of-load converters
• Isolated DC-DC conversion modules

DC DC Switching Controllers Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS compliance details via official documentation. Check regional availability restrictions as distribution may be limited. Validate package marking against datasheet specifications to prevent counterfeit substitution during procurement processes.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring flexible topology support such as Flyback or Forward converters. Ensure input voltage stays within the 10 V to 16.5 V operational range. Consider thermal management requirements given the SOIC-16 package constraints. Verify that the 1 MHz switching frequency aligns with electromagnetic interference limits in the target system design.

DC DC Switching Controllers Part Context

This component belongs to the Vishay Siliconix PMIC family focused on power management integrated circuits. It serves as a switching controller rather than a complete regulator, requiring external MOSFETs and magnetics. The part is designed for medium-power applications needing precise duty cycle control across various isolated and non-isolated architectures.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available. The component is listed as obsolete. Designers should evaluate newer Vishay switching controllers or alternative manufacturers offering compatible pinouts and electrical characteristics for direct replacement strategies.