NSI50350AST3G

Current Regulation/Management Overview

The NSI50350AST3G is a single-channel LED lighting driver IC from onsemi, designed for constant current regulation in boost and buck topologies. It supports an input voltage of up to 50 V and delivers a fixed output current of 350 mA. The device operates within a frequency range of 100 Hz to 100 kHz and features adjustable output voltage capabilities. Packaged in an SMC-2 surface-mount format, it functions across an extended temperature range from -55 °C to +175 °C. Key electrical specifications include a maximum power dissipation of 3.11 W and a maximum supply current of 385 mA.

Current Regulation/Management Feature Summary

• Supports PWM dimming operations for brightness control
• Integrated protection against overvoltage and thermal overload
• Capable of driving LEDs in both boost and buck configurations

Current Regulation/Management Applications

• General solid-state lighting fixtures
• LED backlighting systems
• Automotive interior illumination modules

Current Regulation/Management Procurement Notes

Verify the specific suffix 'AST3G' to confirm the tape-and-reel packaging configuration and lead-free compliance status. Ensure the ordering part number matches the required package variant and environmental certifications such as RoHS and REACH before finalizing procurement orders.

Current Regulation/Management Selection Notes

Select this component when a single-channel constant current solution with high operating temperature tolerance is required. The SMC-2 package suits space-constrained designs, while the 50 V input rating accommodates various LED string voltages in both step-up and step-down applications.

Current Regulation/Management Part Context

This device belongs to the NSI50350AS series of LED drivers. It is manufactured by onsemi and falls under the category of LED Lighting Drivers. The product is AEC-Q101 qualified, indicating suitability for automotive environments alongside general industrial lighting applications.

Current Regulation/Management Replacement Considerations

Consult official substitution guides for compatible alternatives within the same series or family. Verify pin compatibility and electrical parameters before replacing the component in existing designs.