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Product Detailed Parameters
- Description：LOCAL DIMMING 244 MATRIX LED DRI
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Controller
- Topology：Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：55V
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：150kHz ~ 650kHz
- Dimming：Analog, PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-eTSSOP
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The IS32LT3959A-ZLA3-TR is an LED lighting driver IC designed for local dimming applications in a 244 matrix configuration. It operates within a supply voltage range of 4.5 V to 55 V and supports Boost, Buck, and Buck-Boost topologies. The device features a single channel with an open-drain output type, delivering up to 45 mA output current. Operating frequencies range from 360 kHz to 440 kHz, with PWM dimming capability. It is housed in an eTQFP48 package (7mm x 7mm) or TSSOP-28 variant, rated for temperatures between -40°C and +150°C, and holds AEC-Q100 automotive qualification.
Feature Summary
- Supports local dimming control for 244 matrix LED configurations
- Integrates Boost, Buck, and Buck-Boost DC/DC controller topologies
- Features PWM dimming interface with open-drain output
- Automotive grade qualification compliant with AEC-Q100 standards
Applications
- Automotive interior LED lighting systems requiring local dimming
- High-voltage LED matrix backlighting drivers
- Complex LED illumination networks with multiple zones
Procurement Notes
Verify the specific package variant required, as datasheets indicate both eTQFP48 and TSSOP-28 options for this part number. Confirm AEC-Q100 automotive qualification status matches project requirements. Ensure input voltage ranges align with system power rails. Check for recent Product Change Notifications regarding manufacturing updates.
Selection Notes
Select this component when a single-channel driver must manage high-voltage LED matrices with independent zone control. The integrated DC/DC controllers reduce external component count compared to discrete solutions. Verify thermal dissipation capabilities given the 3.99 W power rating. Ensure compatibility with existing PWM control signals and bus interfaces.
Part Context
This IC belongs to Lumissil's IS32LT series of LED lighting drivers. It complements other models like the IS32LT3957A by offering higher channel density support for matrix applications. The series focuses on automotive-grade reliability and flexible topology integration for complex lighting architectures.
Replacement Considerations
The IS32LT3959-ZLA3-TR is a related variant without the 'A' suffix. Verify if pinout and electrical specifications are identical before substitution. Cross-reference with IS32LT3957A for similar topology but different package constraints.
