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Product Detailed Parameters
- Description：IC LED DRV LIN PWM 30MA 20ETSSOP
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：-
- Internal Switch(s)：No
- Number of Outputs：3
- Voltage - Supply (Min)：5V
- Voltage - Supply (Max)：42 V
- Voltage - Output：-
- Current - Output / Channel：30mA
- Frequency：-
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：20-eTSSOP
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The IS32LT3128A-ZLA3-TR is a three-channel linear LED driver IC designed for automotive lighting applications. It features two high-current channels capable of delivering up to 150 mA each, and one dedicated low-current channel providing 30 mA, suitable for button backlighting. The device operates within an input voltage range of 5 V to 42 V and supports PWM dimming with fade-on/fade-off functionality. It includes priority logic where button backlight control overrides other functions. Packaged in a 20-eTSSOP format, it is AEC-Q100 qualified and rated for operation between -40°C and +125°C.
Feature Summary
- Three-channel architecture with dual 150 mA outputs and one 30 mA dedicated output
- PWM dimming capability with integrated fade-on and fade-off timing controls
- Button backlight priority logic ensuring illumination override during active use
- Automotive-grade reliability with AEC-Q100 qualification
Applications
- Automotive exterior lighting systems
- Interior ambient lighting circuits
- Instrument panel button backlighting
- Daytime running light configurations
Procurement Notes
Verify the specific suffix ZLA3 against the manufacturer's latest datasheet to confirm package dimensions and tape/reel specifications. Ensure the design accommodates the 20-eTSSOP thermal requirements given the linear regulation nature. Confirm AEC-Q100 compliance documentation is available for your quality management system before finalizing component selection for production.
Selection Notes
Select this component when a mixed-current solution is required, combining high-power headlamps or DRLs with lower-power interior indicators. The integrated fade control simplifies software requirements for smooth lighting transitions. Consider the 42 V maximum input rating for robustness against automotive load dump conditions. The single 30 mA channel is optimized for small LEDs or LCD backlights without requiring additional current limiting components.
Part Context
This part belongs to Lumissil's IS32LT series of linear LED drivers, which are tailored for automotive environments. Unlike matrix drivers, these devices focus on constant current regulation for individual or grouped LED strings. The IS32LT3128A specifically addresses applications needing asymmetric current distribution across multiple channels within a single compact package.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with Lumissil's official replacement guide or contact the manufacturer directly for validated equivalents.
