SG1845J-883B

Overview

The SG1845J-883B is a high-reliability current mode PWM controller designed for isolated switching regulators. Manufactured by Microchip Technology, it operates within an extended temperature range of -55°C to 125°C and supports input voltages from 8.4 Volts. The component utilizes a 14-CDIP package with dimensions of 0.300 inches (7.62mm). It features a maximum duty cycle of 48% and provides one output. This device is classified as non-RoHS compliant and is intended for off-line applications requiring robust performance in demanding environments.

Feature Summary

• Current mode PWM control architecture for isolated switching regulators
• High-reliability design suitable for harsh operating conditions
• Extended temperature operation ranging from -55°C to 125°C

Applications

• Off-line power supply systems
• Isolated switching regulator designs
• High-reliability industrial electronics

Procurement Notes

Verify the specific ordering suffix and compliance status before procurement, as this part is identified as non-RoHS. Confirm that the 14-CDIP package matches your assembly requirements. Check for factory special order status or availability constraints directly with the manufacturer. Ensure the voltage and temperature specifications align with your system's operational limits. Request official documentation to confirm the exact electrical characteristics and pinout configuration.

Selection Notes

Select this component when designing isolated converters requiring current mode PWM control. Consider its wide temperature range for applications exposed to extreme thermal variations. Evaluate the 48% maximum duty cycle against your transformer design needs. Verify compatibility with the 8.4V minimum input voltage. Assess the need for high-reliability certification if used in critical infrastructure or aerospace contexts.

Part Context

This part belongs to the SG1845 series of current mode PWM controllers produced by Microchip Technology. It is distinct from other variants like the SG1846J, which may offer different output configurations. The SG1845J-883B specifically targets high-reliability markets, often associated with military or aerospace standards given its packaging and temperature rating. It serves as a core control element in offline power conversion topologies.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data. Consult Microchip Technology for direct equivalents or updated revisions. Verify pin-to-pin compatibility if considering alternative current mode PWM controllers. Review datasheet differences regarding input voltage ranges and duty cycle limitations before substitution.