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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 16ETSSOP
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR)
- Type：DC DC Controller
- Topology：Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：-
- Voltage - Supply (Max)：75V
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：100kHz ~ 1MHz
- Dimming：Analog, PWM
- Applications：-
- Operating Temperature：-
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：16-eTSSOP
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The IS32LT3957-ZLA3-TR is a high-voltage LED lighting controller from Lumissil Microsystems, designed for general lighting applications. It operates as a DC-DC controller supporting SEPIC, Buck, and Boost topologies with PWM dimming capabilities. The device features an input voltage range of 5V to 75V and supports switching frequencies between 100kHz and 1MHz. Packaged in a 16-pin eTSSOP (4.40mm wide) with exposed pad, it is qualified to AEC-Q100 standards for automotive use. Operating temperature ranges from -40°C to 125°C (TA), ensuring reliability in demanding environments.
Feature Summary
- Supports multiple converter topologies including SEPIC, buck, and boost for flexible LED drive configurations.
- Integrated fault protection mechanisms enhance system reliability and longevity.
- Capable of analog dimming down to 10% for precise brightness control.
- Automotive-grade qualification ensures compliance with rigorous industry standards.
Applications
- Commercial general lighting systems
- Residential LED lighting fixtures
- Automotive interior and exterior illumination
Procurement Notes
Verify the specific suffix ZLA3 against the manufacturer's latest datasheet to confirm package dimensions and tape/reel specifications. Ensure compatibility with the target PCB footprint for the 16-eTSSOP package. Confirm that the design accounts for the thermal requirements associated with the exposed pad configuration. Cross-reference the part number with authorized distributors to avoid counterfeit components.
Selection Notes
Select this component when a single-channel solution is required for high-voltage LED strings. It is suitable for designs needing flexibility between buck, boost, or SEPIC operations. Consider the 100kHz to 1MHz frequency range for inductor size optimization. Verify that the 75V maximum rating aligns with the peak LED string voltage under all operating conditions.
Part Context
This part belongs to the IS32LT3957 family of high-voltage LED drivers. It shares functional similarities with other members like the IS32LT3961 but may differ in specific pinouts or internal parameters. The family targets both commercial and automotive markets, offering integrated power solutions. Development tools such as the IS32LT3957-GRLA3-EB are available for evaluation.
Replacement Considerations
The IS32LT3961-ZLA3-TR is a related dual-channel variant within the same product family. Direct substitution requires verifying channel count differences and pinout compatibility. Other single-channel controllers may require significant circuit redesign due to topology or control interface differences.
