NSI45090JDT4G

Current Regulation/Management Overview

The NSI45090JDT4G is a self-biased transistor (SBT) adjustable constant current regulator designed for LED applications. It features a maximum anode-cathode voltage of 45 V and supports a regulated current range of 90 mA to 160 mA with ±15% accuracy. The device operates within a temperature range of -55°C to 175°C and handles up to 2.7 W of power dissipation in a TO-252 (DPAK) package. It enables PWM dimming, requires no external components for regulation, and provides negative temperature coefficient protection against thermal runaway.

Current Regulation/Management Feature Summary

• Utilizes self-biased transistor technology for simple high or low-side configuration without external components
• Provides negative temperature coefficient behavior to protect LEDs from thermal runaway under extreme conditions
• Supports precise pulse-width modulation dimming with fast start-up characteristics
• Features high anode-cathode voltage rating to withstand electrical surges common in automotive and industrial environments

Current Regulation/Management Applications

• Automotive exterior and interior LED lighting systems
• Industrial commercial signage illumination
• High-power general LED lighting fixtures
• Cost-effective LED current regulation circuits

Current Regulation/Management Procurement Notes

Verify the specific ordering suffix matches the required tolerance and packaging format. Confirm that the DPAK thermal pad connection aligns with the PCB layout requirements for adequate heat dissipation. Ensure the design accounts for the specified operating temperature range and power derating curves to maintain reliability under all expected load conditions.

Current Regulation/Management Selection Notes

Select this component when a robust, single-component solution is needed for LED current regulation without complex control circuitry. It is suitable for designs requiring wide input voltage tolerance and inherent surge protection. Consider the thermal resistance characteristics relative to the copper trace area to ensure the junction temperature remains within safe limits during continuous operation.

Current Regulation/Management Part Context

This device belongs to the NSI450 series of linear constant current regulators from onsemi. These regulators are engineered to replace resistive current limiting methods, offering superior brightness consistency across varying supply voltages. The series utilizes proprietary SBT technology to deliver reliable performance in demanding lighting applications where size and cost efficiency are critical constraints.

Current Regulation/Management Replacement Considerations

Compatible substitutes include other models within the NSI450 family, such as the NSI45060JDT4G, which offers different current settings but shares similar interface and package characteristics. Verify that any replacement maintains the required current regulation range and voltage ratings for the specific application.