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Product Detailed Parameters
- Description：IC LED DRVR LIN 75.5MA 24TSSOP
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tube
- 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：24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：24-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The A6279ELP-T is a linear LED driver IC manufactured by Allegro MicroSystems, designed for high-precision illumination control. It features sixteen independent constant-current outputs capable of delivering up to 75.5mA per channel. The device operates on a supply voltage range of 3V to 5.5V and utilizes a 28-pin QFN (5x5mm) package with an exposed pad for thermal management. It integrates a shift register topology for serial data input and supports PWM dimming frequencies up to 25MHz. The component is rated for an ambient operating temperature range of -40°C to 85°C.
Feature Summary
- Integrates sixteen individually addressable constant-current channels for precise multi-zone LED control
- Supports high-frequency pulse-width modulation dimming for flicker-free brightness adjustment
- Includes internal protection mechanisms against over-temperature conditions and output faults
Applications
- Automotive interior lighting systems including reading lamps and dome lights
- Industrial LED panel illumination requiring uniform current distribution
- Consumer electronics backlighting applications demanding compact form factors
Procurement Notes
Verify the specific suffix 'ELP' against the official datasheet to confirm the 28-QFN package variant. Confirm RoHS compliance status and moisture sensitivity level prior to assembly planning. Check for obsolescence notices or lifecycle changes from Allegro MicroSystems as this component may have discontinued status in certain regions.
Selection Notes
Select this component when a high channel count is required within a small surface-mount footprint. Ensure the host system provides a stable 3V to 5.5V supply rail compatible with the linear regulation architecture. Verify that the thermal design accommodates the power dissipation inherent to linear drivers at maximum load currents.
Part Context
This part belongs to the A6279 family of LED drivers from Allegro MicroSystems, which focuses on linear regulation solutions. The family shares core functionalities such as shift-register control and PWM dimming capabilities across various package options like SOIC and QFN variants.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Allegro MicroSystems application engineering for qualified alternatives if this specific package variant is unavailable.
