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Product Detailed Parameters
- Description：IC LED DRVR RGLTR PWM 1A 8HVSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Step-Down (Buck)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：3V
- Voltage - Supply (Max)：22V
- Voltage - Output：-
- Current - Output / Channel：1A
- Frequency：1.6MHz
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-HVSSOP
- Grade：-
- Qualification：-
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Overview
The LM3405AXMY/NOPB is a constant current buck LED driver IC from Texas Instruments, housed in an MSOP-PowerPad-8 package. It operates with an input voltage range of 3 V to 22 V and delivers up to 1 A output current. The device features an adjustable switching frequency between 1.2 MHz and 1.9 MHz, typically set at 1.6 MHz. It supports PWM dimming and includes thermal shutdown protection. The component functions within a temperature range of -40 °C to +125 °C.
Feature Summary
- Integrates a high-side N-channel power switch for compact design
- Supports precise PWM dimming control for brightness adjustment
- Includes thermal shutdown protection to prevent overheating
Applications
- High-power high-brightness LED lighting systems
- Automotive exterior lighting applications
- General-purpose LED illumination circuits
Procurement Notes
Verify the exact suffix 'NOPB' confirms RoHS compliance and lead-free status. Confirm the 'XMY' designation matches the required MSOP-PowerPad-8 package variant. Ensure the order quantity aligns with manufacturer reel or cut-tape specifications. Cross-reference the datasheet revision date to confirm feature consistency.
Selection Notes
Select this component when a single-output constant current solution is required for high-brightness LEDs. The integrated switch eliminates external MOSFET requirements. Verify that the input voltage range of 3 V to 22 V suits the power supply design. Ensure the thermal performance of the MSOP-PowerPad-8 package meets the application's heat dissipation needs.
Part Context
This part belongs to the LM3405A series of LED drivers. It is distinct from the LM3405XMK variants which use a TSOT-23-6 package. The LM3405AEVAL/NOPB serves as the official evaluation board for this device family. It is designed for non-isolated buck converter topologies.
Replacement Considerations
The LM3405AXMK/NOPB offers identical electrical performance but utilizes a TSOT-23-6 package instead of MSOP-PowerPad-8. Pinout compatibility must be verified before substitution due to package differences.
