SC441TETRT

Overview

The SC441TETRT is a DC-DC regulator from Semtech, designed for LED backlight applications. It utilizes a step-up (boost) topology with an internal switch and four independent output channels. Each channel supports a maximum output current of 150mA, while the device handles supply voltages between 4.5V and 21V, delivering up to 36V at the outputs. Operating at a fixed frequency of 700kHz, it offers both analog and PWM dimming capabilities. The component is housed in a 20-TSSOP package with an exposed pad and is qualified under the AEC-Q100 automotive standard.

Feature Summary

• Four-channel constant current regulation for multi-zone LED arrays
• Integrated analog and pulse-width modulation dimming control
• Automotive-grade reliability compliant with AEC-Q100 standards

Applications

• Automotive LCD backlight systems
• Multi-zone LED lighting modules
• High-reliability industrial display drivers

Procurement Notes

Verify the specific suffix 'A' in the part number SC441ATETRT against official datasheets to confirm functional specifications, as ordering suffixes may indicate variations. Confirm availability status, as this component may be subject to last-time-buy notices or limited production runs. Ensure compatibility with the intended PCB footprint for the 20-TSSOP-EP package before finalizing procurement orders.

Selection Notes

Select this component when designing automotive or high-reliability displays requiring four independent LED channels. It is suitable for boost converter topologies where input voltages range from 4.5V to 21V. Consider the 700kHz switching frequency for inductor size trade-offs. Verify that the required dimming method aligns with the supported analog and PWM inputs. Ensure the thermal design accommodates the TSSOP package's thermal dissipation characteristics.

Part Context

This part belongs to Semtech's SC441 series of LED drivers, specifically engineered for automotive and industrial applications. The series focuses on providing regulated current for multiple LED strings in display backlights. The SC441 variant distinguishes itself through its four-channel architecture and robust automotive qualification, differentiating it from single-channel consumer-grade alternatives.

Replacement Considerations

Consult official cross-reference tools for parametrically similar parts. Verify pinout compatibility and electrical parameters such as output current and voltage ranges before substituting.