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Product Detailed Parameters
- Description：IC LED DRIVER RGLTR PWM 3A 8SOP
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：3A
- Frequency：-
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TA)
- 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 IS32LT3954-GRLA3-TR is a single-channel, dimmable constant current buck LED driver IC manufactured by Lumissil Microsystems. It operates within an input voltage range of 4.5V to 38V and delivers a regulated output current of 3.0A. The device features PWM dimming capabilities and incorporates spread spectrum technology for EMI reduction. It includes robust fault reporting mechanisms and is housed in an 8-SOP-EP package with exposed pad for thermal efficiency. The component is qualified to AEC-Q100 standards for automotive applications.
Feature Summary
- Integrates spread spectrum modulation to minimize electromagnetic interference during switching operations.
- Provides comprehensive fault reporting capabilities for system diagnostics and protection.
- Supports high-efficiency DC-to-DC step-down topology for constant current LED driving.
- Features internal PWM dimming control for precise brightness adjustment.
Applications
- Automotive exterior lighting systems
- High-power LED illumination modules
- Industrial lighting fixtures
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 qualification status with your project's reliability requirements before finalizing procurement.
Selection Notes
Select this component when a single-channel, high-current (3A) buck driver is required for automotive or industrial environments. It is suitable for designs needing integrated EMI mitigation via spread spectrum and detailed fault feedback. Compare against the IS32LT3952 if lower current (1.5A) is sufficient, or consider multi-channel alternatives for complex matrix arrays.
Part Context
This part belongs to the IS32LT395x series of LED lighting drivers from Lumissil Microsystems. The series focuses on providing robust, high-performance solutions for demanding lighting applications. The IS32LT3954 specifically targets higher power density requirements compared to lower-current variants in the same family, utilizing the SOP-8-EP package for thermal management.
Replacement Considerations
The IS32LT3952-GRLA3-TR is a related single-channel variant but offers only 1.5A output current. Direct substitution requires verifying that the load does not exceed 1.5A. No other direct pin-compatible replacements are confirmed in the provided documentation.
