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Product Detailed Parameters
- Description：1.5A DIMMABLE BUCK SWITCHING REG
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR)
- Type：DC DC Regulator
- Topology：Step-Down (Buck)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：38V
- Voltage - Output：-
- Current - Output / Channel：1.5A
- Frequency：-
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Supplier Device Package：8-SOP-EP
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The IS32LT3951-GRLA3-TR is a dimmable constant-current buck LED driver manufactured by Lumissil Microsystems. It integrates an N-channel MOSFET and controller-based external MOSFET solutions for flexible design. The device supports PWM dimming and includes output fault reporting capabilities. It operates within a voltage range of 4.5V to 40V and delivers up to 1.5A output current. The component is housed in an 8-SOP-EP package with a bare pad for thermal management.
Feature Summary
- Integrates an N-channel MOSFET for compact switching regulator design
- Supports PWM dimming for adjustable brightness control
- Includes built-in output fault reporting for system diagnostics
- Features AEC-Q100 automotive grade qualification for reliability
Applications
- Automotive lighting systems
- Commercial lighting fixtures
- Residential LED illumination
Procurement Notes
Verify the specific suffix GRLA3 against the manufacturer's latest datasheet to confirm pinout and thermal pad configuration. Ensure the ordering part number matches the required tape and reel quantity specifications. Cross-reference the AEC-Q100 certification status for automotive compliance requirements before finalizing procurement decisions.
Selection Notes
Select this component for applications requiring a single-output buck topology with integrated power switching. The 1.5A current rating suits medium-power LED strings. Consider the 8-SOP-EP package for thermal dissipation needs. Verify input voltage compatibility within the 4.5V to 40V range for the target circuit design.
Part Context
This part belongs to the IS32LT39xx series of high-brightness LED drivers from Lumissil Microsystems. These devices are designed for commercial, residential, and automotive markets. The series offers flexibility through integrated or controller-based MOSFET options. They provide extended-life operation with built-in protections against common failure modes.
Replacement Considerations
The IS32LT3952-GRLA3-TR is a documented substitute within the same family. Both parts share similar buck converter topologies and SOP-8-EP packaging. Verify if the specific current ratings and fault reporting features align with the original design requirements before substitution.
