AS1109-BSSU-Z

Overview

The AS1109-BSSU-Z is a linear LED driver IC manufactured by ams-OSRAM USA INC. It features an internal shift register topology with eight output channels, each capable of delivering up to 100 mA. The device operates on a supply voltage range from 3.15 V to 5.5 V and supports output voltages up to 15 V. Designed for signage applications, it functions within a temperature range of -40°C to +85°C. The component is housed in a 16-SSOP package with a width of 3.90 mm and utilizes a 50 MHz frequency interface.

Feature Summary

• Integrates an internal shift register for serial data input control
• Provides eight independent constant current output channels
• Supports linear regulation topology for LED driving

Applications

• LED signage systems
• Display backlighting drivers
• General illumination control circuits

Procurement Notes

Verify the specific suffix 'Z' against the manufacturer's official documentation to confirm compliance with RoHS directives or halogen-free status, as suffixes often denote environmental packaging variations rather than functional changes. Confirm active status directly with ams-OSRAM, as distributor listings may reflect obsolete or limited stock conditions. Ensure the 16-SSOP footprint matches the target PCB design constraints before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring eight individually addressable LED channels with moderate current drive capabilities. The linear topology is suitable for applications where power dissipation can be managed effectively within the thermal limits of the 16-SSOP package. Verify that the system supply voltage remains within the 3.15 V to 5.5 V range to ensure proper operation of the internal shift register and output drivers.

Part Context

This part belongs to the AS1109 series of LED drivers from ams-OSRAM, designed primarily for display and signage applications. The series typically offers multi-channel solutions with serial interface capabilities. The BSSU variant specifically denotes the 16-SSOP surface mount package configuration, distinguishing it from other pin-out or package options available within the broader product family.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult ams-OSRAM technical support for verified cross-reference data.