SI9120DJ-E3

AC DC Converters, Offline Switchers Overview

The SI9120DJ-E3 is a universal input switching controller manufactured by Vishay Siliconix, designed for flyback, forward, and push-pull topologies. It operates with a fixed switching frequency of 1 MHz and supports a maximum duty cycle of 50%. The device features a single output capable of delivering 125 mA at 9.7 V. It functions within an operating temperature range of -40°C to +85°C and requires a supply voltage between 9.5 V and 13.5 V, drawing 1.5 mA of quiescent current. The component is housed in a PDIP-16 through-hole package.

AC DC Converters, Offline Switchers Feature Summary

• Supports multiple converter topologies including flyback, forward, and push-pull configurations.
• Features high-speed switching capabilities with specified rise and fall times.
• Designed for universal input applications with integrated control logic.

AC DC Converters, Offline Switchers Applications

• Flyback power supply designs
• Forward converter implementations
• Push-pull transformer driver circuits

AC DC Converters, Offline Switchers Procurement Notes

Verify the End of Life status before procurement, as this component may be discontinued. Confirm that the PDIP-16 through-hole package aligns with your PCB layout requirements. Ensure compatibility with the required 1 MHz switching frequency and 50% duty cycle limits. Validate that the 9.5 V to 13.5 V supply range meets your system's power constraints. Check for available alternative sources due to potential obsolescence.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications requiring a universal input solution with fixed frequency operation. Consider the PDIP-16 package if through-hole assembly is necessary. Evaluate the 125 mA output capability against load requirements. Verify thermal performance within the -40°C to +85°C operating range. Compare against other Vishay controllers if surface-mount options are preferred.

AC DC Converters, Offline Switchers Part Context

This part belongs to the Vishay Siliconix switching controller family, specifically engineered for isolated DC-DC conversion. It integrates essential control functions for managing power switches in various transformer-based topologies. The device is categorized under PMIC solutions, targeting efficient power management in industrial and consumer electronics.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official Vishay documentation for confirmed substitute part numbers. Verify pinout compatibility and electrical specifications before substitution. Check for updated versions within the same product line.