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Product Detailed Parameters
- Description：IC LED DRVR LINEAR 75.5MA 28QFN
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Shift Register
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：75.5mA
- Frequency：25MHz
- Dimming：-
- Applications：-
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-VFQFN Exposed Pad
- Supplier Device Package：28-QFN (5x5)
- Grade：-
- Qualification：-
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Overview
The A6279EETTR-T is a linear LED driver IC manufactured by Allegro MicroSystems, designed for high-performance lighting applications. It features sixteen independent outputs with an internal shift register topology for simplified serial control. The device supports a supply voltage range from 3V to 5.5V and delivers up to 75.5mA per channel. Operating at a frequency of 25MHz, it accommodates ambient temperatures between -40°C and 85°C. Packaged in a compact 28-QFN (5x5mm) surface-mount format, this component integrates internal switches for efficient power management.
Feature Summary
- Integrates a 16-channel linear output architecture controlled via a serial shift register interface for streamlined data input.
- Supports PWM dimming capabilities to adjust LED brightness levels while maintaining constant current regulation.
- Features internal switching mechanisms that simplify external circuit design by reducing the need for additional discrete components.
Applications
- Automotive interior illumination systems
- Industrial LED lighting arrays
- Consumer electronic backlighting modules
Procurement Notes
Verify part authenticity through official Allegro MicroSystems channels or authorized distributors. Confirm package integrity and RoHS compliance status prior to integration. Check for obsolescence notices as product availability may be limited. Ensure ESD protection protocols are followed during handling. Validate pinout compatibility with existing PCB layouts before finalizing procurement orders.
Selection Notes
Select this component when designing circuits requiring multiple independently controllable LED channels within a low-voltage environment. The linear topology suits applications where precise current regulation is prioritized over efficiency gains offered by switching regulators. Consider the 28-QFN footprint constraints and thermal dissipation requirements relative to the target enclosure design.
Part Context
This model belongs to the A6279 series of LED drivers, which are engineered for multi-channel lighting control. The series emphasizes ease of use through serial interfaces and robust performance across varying temperature ranges. It complements Allegro's portfolio of power management solutions tailored for automotive and industrial sectors.
Replacement Considerations
Public confirmed substitute part numbers: None identified in available documentation.
FAQ
What is the maximum supply voltage for the A6279EETTR-T?
The maximum supply voltage is 5.5V.
Does the A6279EETTR-T support PWM dimming?
Yes, the device supports PWM dimming functionality for brightness control.
