NSIC2050JBT3G

Current Regulation/Management Overview

The NSIC2050JBT3G is a linear constant current regulator designed for LED lighting applications. It operates with an AC line input of 120V and provides a regulated output current of 50mA with a tolerance of +/-15%. The device utilizes self-biased transistor (SBT) technology to maintain stable current regulation across a wide voltage range. It features a negative temperature coefficient to prevent thermal runaway in LEDs. The component is housed in a DO-214AA (SMB) surface-mount package, rated for power dissipation up to 3W, and supports PWM dimming operations.

Current Regulation/Management Feature Summary

• Utilizes self-biased transistor technology for precise current regulation without external components
• Provides immediate turn-on capability at low anode-cathode voltage
• Features negative temperature coefficient to protect LEDs from thermal runaway
• Capable of withstanding high peak voltages and surges common in AC offline environments

Current Regulation/Management Applications

• Automotive side mirror markers
• Instrument cluster backlighting
• High-mounted stop lamp (CHMSL)
• Commercial signage

Current Regulation/Management Procurement Notes

Verify the specific suffix JBT3G corresponds to the required tape and reel packaging configuration. Confirm that the 50mA nominal current rating aligns with the target LED string design. Ensure the SMB package footprint matches the PCB layout constraints. Check for AEC-Q101 certification requirements if the application involves automotive systems, as standard versions may differ from NSV prefixed variants.

Current Regulation/Management Selection Notes

Select this component when a simple, cost-effective linear solution is preferred over complex switching drivers. It is suitable for applications requiring fixed current regulation where dimming is achieved via PWM control rather than analog adjustment. Consider the 3W power rating and thermal management needs for the SMB package. Compare against NSIC2020JBT3G or NSIC2030JB if different current levels are required.

Current Regulation/Management Part Context

This part belongs to the NSIC20xxJB series of linear constant current regulators from onsemi. The series includes variants such as NSIC2020JBT3G (20mA) and NSIC2030JB (30mA). These devices share the same core SBT technology and package style but differ in their nominal regulated current outputs. The series is designed for direct replacement of constant current diodes in various lighting architectures.

Current Regulation/Management Replacement Considerations

NSIC2020JBT3G offers 20mA regulation; NSIC2030JB offers 30mA regulation. Both share the same package and technology. Verify current requirements before substitution. Automotive-grade alternatives include parts with the NSV prefix, which carry AEC-Q101 certification.