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Product Detailed Parameters
- Description：IC LED DRV RGLTR PWM 1A TSOT23-6
- 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)：15V
- Voltage - Output：13.5V
- Current - Output / Channel：1A
- Frequency：1.6MHz
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-6 Thin, TSOT-23-6
- Supplier Device Package：TSOT-23-6
- Grade：-
- Qualification：-
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Overview
The LM3405XMK/NOPB is a constant-current buck LED driver IC from Texas Instruments, designed for high-brightness LED applications. It operates with an input voltage range of 3V to 22V and delivers a regulated output current of 1A. The device features an integrated power switch and supports PWM dimming for brightness control. It utilizes a TSOT-23-6 package and functions within a junction temperature range of -40°C to +125°C. The switching frequency is typically 1.6MHz, allowing for compact external component designs suitable for space-constrained lighting solutions.
Feature Summary
- Integrates a high-side N-channel power switch to minimize external component count
- Supports precise PWM dimming for adjustable LED brightness control
- Includes thermal shutdown protection to safeguard against overheating
- Features enable/shutdown capability for system power management
Applications
- Automotive interior and exterior lighting systems
- Portable battery-powered LED flashlights
- General illumination LED modules
- Backlighting for displays and indicators
Procurement Notes
Verify the exact suffix configuration against the manufacturer's latest datasheet to ensure compatibility with specific packaging or environmental requirements. Confirm RoHS compliance status as indicated in official documentation. Cross-reference the ordering part number with authorized distributors to avoid counterfeit components. Check for any recent product change notifications that may affect pinout or electrical characteristics before finalizing procurement.
Selection Notes
Select this component when a compact, single-output constant-current solution is required for buck topology LED drivers. Ensure the input voltage range aligns with the available power supply rails. Consider the TSOT-23-6 package constraints for thermal dissipation in enclosed spaces. Verify that the required dimming frequency falls within the operational limits of the internal circuitry. Evaluate board space availability against the small form factor benefits.
Part Context
This part belongs to the LM3405 family of LED drivers, which are widely used in automotive and portable lighting. The XMK variant specifically denotes the TSOT-23-6 thin package option. It serves as a direct replacement for older non-NOPB versions in many designs, offering improved environmental compliance while maintaining identical electrical performance and pinout compatibility.
Replacement Considerations
The LM3405XMK/NOPB is the lead-free, RoHS-compliant version of the discontinued LM3405XMK. Designers transitioning from the original LM3405XMK should verify that no additional solder mask or reflow profile adjustments are needed, as the functional specifications remain unchanged.
