SC441CTETRT

Overview

The SC441CTETRT is a DC-DC regulator designed for LED backlight applications, manufactured by Semtech. It operates within a supply voltage range of 4.5V to 21V and delivers up to 36V output. The device features four independent channels, each capable of sourcing 150mA. Operating at a fixed frequency of 700kHz, it supports both analog and PWM dimming methods. Packaged in a 20-TSSOP with an exposed pad, this component is part of the automotive AEC-Q100 qualified series, ensuring reliability for demanding environments.

Feature Summary

• Integrates four independent boost converters for multi-zone LED control
• Supports precise brightness adjustment via analog or PWM dimming signals
• Includes internal power switches to minimize external component count
• Qualified for automotive applications under AEC-Q100 standards

Applications

• Automotive LCD backlight systems
• Multi-zone LED lighting arrays
• High-reliability industrial display backlights

Procurement Notes

Verify the specific suffix 'C' against official Semtech documentation to confirm exact electrical tolerances and temperature grades, as suffixes often denote specific variants. Confirm package availability and lead times directly with authorized distributors. Ensure compatibility with existing PCB footprints for the 20-TSSOP-EP package before procurement.

Selection Notes

Select this component when designing systems requiring four independent LED channels from a single controller. It is suitable for applications needing high efficiency and compact size due to integrated switches. Consider the 700kHz switching frequency for inductor sizing trade-offs. Verify that the input voltage range of 4.5V to 21V matches the system power supply architecture.

Part Context

This part belongs to the SC441 family of LED drivers, which are specialized for automotive and industrial backlighting. The family is characterized by its ability to drive multiple LEDs in series or parallel configurations with individual channel control. It addresses the need for uniform brightness and fault tolerance in complex lighting setups.

Replacement Considerations

Check Semtech's official substitution guide for direct pin-compatible alternatives. Verify if other suffixes like 'A' or 'T' offer identical functionality with different packaging or temperature ranges. Do not assume cross-compatibility with non-Semtech LED drivers without detailed parameter matching.