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Product Detailed Parameters
- Description：IC LED DRIVER LIN DIM
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：-
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：5V
- Voltage - Supply (Max)：40V
- Voltage - Output：40V
- Current - Output / Channel：200mA
- 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：-
- Qualification：-
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Overview
The IS31LT3177-GRLS4-TR is a linear constant-current LED driver IC manufactured by Lumissil Microsystems. It provides an adjustable output current ranging from 10 mA to 200 mA with integrated 1 kHz PWM dimming capability via a dedicated pin. The device operates within a supply voltage range of 2.9 V to 5.5 V and features excellent temperature stability for reliable performance. Packaged in an 8-SOP-EP (LSSOP) format measuring 4.9 mm x 6.0 mm, it includes internal protection mechanisms designed to ensure extended operational life in general lighting applications.
Feature Summary
- Adjustable linear constant current output suitable for precise LED brightness control
- Integrated hardware PWM dimming interface supporting 1 kHz frequency operation
- Monolithic design with built-in power MOSFET for simplified circuit implementation
- Enhanced thermal stability characteristics across the operating temperature range
Applications
- General commercial and residential LED lighting fixtures
- Automotive interior and exterior illumination systems
- Battery-powered portable lighting devices requiring efficient regulation
Procurement Notes
Verify the specific suffix GRLS4-TR against official Lumissil documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with your PCB footprint for the 8-SOP-EP configuration. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and check for any recent product change notices or lifecycle status updates prior to finalizing procurement orders.
Selection Notes
Select this component when designing circuits requiring a single-channel linear LED driver with integrated PWM dimming. It is appropriate for applications where cost-effective monolithic solutions are preferred over controller-based architectures with external MOSFETs. Consider the 2.9 V to 5.5 V input range and the 10 mA to 200 mA current adjustability to match specific LED string requirements and system voltage constraints.
Part Context
This device belongs to the Lumissil IS31LT31xx series of high-brightness LED drivers. The series offers a portfolio of monolithic solutions featuring integrated power MOSFETs and various protection features. These drivers are engineered to address diverse lighting needs in commercial, residential, and automotive markets, providing flexibility in design while ensuring extended life operation through robust internal protections.
Replacement Considerations
The IS31LT3178-GRLS4-TR is a confirmed substitute within the same family, offering similar linear driving capabilities. Verify pinout compatibility and electrical parameter alignment before substitution.
