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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 28HTSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：DC DC Controller
- Topology：-
- Internal Switch(s)：No
- Number of Outputs：4
- Voltage - Supply (Min)：12V
- Voltage - Supply (Max)：80V
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：-
- Dimming：Analog, PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-PowerTSSOP (0.173", 4.40mm Width)
- Supplier Device Package：28-HTSSOP
- Grade：-
- Qualification：-
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Overview
The LM3464MH/NOPB is a high-voltage LED driver IC from Texas Instruments featuring Dynamic Headroom Control (DHC). It supports boost and buck topologies with four independent constant current channels. The device operates on an input voltage range of 12 V to 80 V, delivering up to 4 A per channel. It utilizes a 28-pin HTSSOP package and supports both analog and PWM dimming methods. The integrated thermal foldback feature ensures reliable operation across temperatures from -40°C to +125°C.
Feature Summary
- Dynamic Headroom Control optimizes efficiency by adjusting the output voltage headroom dynamically.
- Four independent constant current channels allow for flexible multi-string LED configurations.
- Integrated thermal foldback protection reduces current to prevent overheating under fault conditions.
Applications
- High-power LED lighting systems
- Industrial LED illumination
- Automotive exterior lighting modules
Procurement Notes
Verify the specific suffix against the manufacturer's official datasheet to confirm pinout and electrical specifications. Ensure the ordering part number matches the required package variant and temperature grade. Cross-reference the RoHS status and compliance documentation directly with the supplier's certified product data sheet prior to procurement.
Selection Notes
Select this component for designs requiring high input voltage tolerance and multi-channel control. Evaluate the thermal management requirements given the 4 A per channel capability. Confirm that the application circuit supports the necessary boost or buck topology. Verify compatibility with the desired dimming interface, whether analog or PWM, before finalizing the design.
Part Context
This device belongs to the LM3464 series of LED drivers. It is designed for applications demanding high efficiency and precise current regulation in high-voltage environments. The integration of DHC distinguishes it from standard constant current drivers by actively managing power dissipation.
Replacement Considerations
Check for direct substitutes within the LM3464 family. Verify pin-to-pin compatibility and electrical parameter alignment with alternative TI part numbers before substitution.
