SG1825CJ-883B

Overview

The SG1825CJ-883B is a high-reliability, hermetically sealed current-mode PWM controller manufactured by Microchip Technology. Designed for military and aerospace applications, it operates with a maximum switching frequency of 1500 kHz and provides a peak output drive current of 200 mA. The device utilizes a 16-pin ceramic dual in-line package (CDIP) to ensure environmental stability. It supports step-down and step-up/down topologies, featuring bipolar technology construction. Key electrical parameters include a wide operating temperature range and precise control capabilities suitable for isolated switching regulators.

Feature Summary

• Hermetically sealed ceramic packaging for extreme environmental reliability
• Current-mode pulse width modulation control architecture
• High-speed switching capability up to 1500 kHz
• Dedicated transistor driver output stage

Applications

• Military power supply systems
• Aerospace isolated switching regulators
• High-reliability DC-DC converters
• Harsh environment industrial electronics

Procurement Notes

Verify the specific manufacturer source, as listings may attribute this part to Microsemi or Microchip Technology due to corporate history. Confirm that the component meets strict military qualification standards required for your application. Ensure the CDIP-16 package matches your board layout constraints. Request full traceability documentation and test reports from authorized distributors to guarantee authenticity and performance consistency.

Selection Notes

Select this component when high-reliability current-mode control is required in space-constrained, hermetically sealed designs. It is appropriate for applications demanding stable operation under extreme thermal conditions. Consider the 200 mA drive limit when sizing external switching elements. Evaluate the 1500 kHz frequency against EMI requirements and transformer design constraints for optimal efficiency.

Part Context

This part belongs to the SG1825 series of high-reliability switching controllers. It shares functional similarities with other military-grade PWM controllers but is distinguished by its specific hermetic sealing and current-mode topology. It serves as a critical control element in ruggedized power conversion systems where standard commercial components would fail.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before considering alternative sources.