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Product Detailed Parameters
- Description：IC LED DRV RGLTR PWM 8SOPWRPAD
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：DC DC Regulator
- Topology：Step-Down (Buck)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：6V
- Voltage - Supply (Max)：75V
- Voltage - Output：73V
- Current - Output / Channel：1A
- Frequency：1MHz
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-PowerSOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO PowerPad
- Grade：Automotive
- Qualification：-
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Overview
The LM3404HVMR is a monolithic switching regulator designed to deliver constant currents to high power LEDs. It operates as a buck converter with an input voltage range of 6V to 75V DC and a maximum output voltage of 73V. The device provides a regulated output current of 1A, supporting up to 20 series-connected LEDs. It features PWM dimming capability and supports switching frequencies from 10 kHz to 1 MHz. The component is housed in an 8-pin HSOP (SO-PowerPad-8) package and functions within a temperature range of -40°C to +125°C.
Feature Summary
- Monolithic buck regulator topology for driving high-power LEDs
- Supports wide input voltage range up to 75V DC
- Enables precise LED brightness control via PWM dimming interface
Applications
- High power LED lighting systems
- LED backlighting applications
- General illumination circuits requiring constant current regulation
Procurement Notes
Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and thermal pad configuration. Ensure the selected variant matches the required operating temperature range and packaging style for your PCB layout. Cross-reference the ordering information directly with the manufacturer's datasheet to avoid discrepancies between distributor listings and official specifications.
Selection Notes
Select this component when a wide input voltage range up to 75V is required for driving multiple series LEDs. Consider the 1A constant current output for high-power applications. Evaluate the need for PWM dimming functionality and the specific switching frequency requirements between 10 kHz and 1 MHz. Confirm that the SO-PowerPad-8 package fits the thermal and spatial constraints of the design.
Part Context
The LM3404HVMR belongs to the LM3404HV family of constant current buck regulators. This series is engineered specifically for driving high-power LEDs where stable current regulation is critical. The HV designation indicates the higher voltage tolerance compared to standard variants, allowing for more series-connected LEDs in a single chain.
Replacement Considerations
The LM3404HVMR/NOPB is a verified equivalent part number representing the same functional device with RoHS compliance. Verify pin-to-pin compatibility and thermal characteristics before substitution.
