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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：Step-Up (Boost)
- Internal Switch(s)：No
- Number of Outputs：3
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：36V
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：1MHz
- Dimming：Analog, PWM
- Applications：Backlight
- 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：Automotive
- Qualification：AEC-Q100
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Overview
The LM3431QMH/NOPB is a three-channel constant current LED driver IC manufactured by Texas Instruments. It utilizes a boost topology to drive LEDs with an output current capability of 200 mA per channel. The device operates within an input voltage range of 5 V to 36 V and supports an adjustable switching frequency between 200 kHz and 1 MHz. It is housed in an HTSSOP-28 package and is designed for operation across a temperature range of -40°C to +125°C.
Feature Summary
- Provides three independent constant current outputs for multi-string LED applications
- Supports both analog and PWM dimming control methods
- Includes integrated thermal shutdown protection for enhanced reliability
Applications
- Automotive exterior lighting systems
- General solid-state lighting fixtures
- Industrial LED illumination modules
Procurement Notes
Verify the specific suffix against official manufacturer documentation to confirm automotive qualification status and pinout compatibility. Ensure the ordering part number matches the exact package variant required for your PCB layout. Cross-reference the datasheet revision date to validate all electrical specifications before finalizing component selection.
Selection Notes
Select this component when designing circuits requiring three separate LED channels from a single controller. The wide input voltage range accommodates various power supply configurations. Consider the thermal performance requirements given the operating temperature limits and ensure adequate heat dissipation for the HTSSOP-28 package in enclosed environments.
Part Context
This part belongs to the LM3431 series of LED drivers, which are engineered for high-efficiency lighting solutions. The 'Q' designation typically indicates automotive-grade qualification, aligning with AEC-Q100 standards for ruggedness. It serves as a specialized solution for replacing discrete LED driver designs with a consolidated integrated circuit approach.
Replacement Considerations
Consult official substitution guides for compatible alternatives. Verify that any replacement maintains the same HTSSOP-28 footprint and electrical characteristics.
