Texas Instruments LM3410XMYX/NOPB

Overview

LM3410XMYX/NOPB from Texas Instruments is a 1.6-MHz constant-current boost/SEPIC LED driver IC with internal NMOS switch (170 mΩ), 190-mV feedback reference, and PWM dimming capability. It delivers up to 2.8-A peak switch current, supports 2.7–5.5-V input and 3–24-V output, and targets high-brightness LED backlighting in handheld and automotive displays.

For engineers reviewing the LM3410XMYX/NOPB datasheet, LM3410XMYX/NOPB pinout, LM3410XMYX/NOPB application, or LM3410XMYX/NOPB equivalent, key selection criteria include switching frequency (1.6 MHz), internal compensation, thermal shutdown (165°C), cycle-by-cycle current limit, and compatibility with ceramic input/output capacitors in space-constrained designs.

Technical Context

The LM3410XMYX/NOPB implements current-mode PWM control with fixed 1.6-MHz oscillator, enabling stable regulation of LED current via external sense resistor and 190-mV internal reference. Its internal 170-mΩ NMOS switch and cycle-by-cycle current limiting (2.1–2.8 A) support efficient high-current boost operation without external current-sense amplifiers.

It integrates soft-start, undervoltage lockout (2.3–2.65 V rising), and thermal shutdown (165°C trip, ~150°C recovery). The DIM pin accepts 0–100% PWM duty cycle (1 Hz–25 kHz) for analog-equivalent brightness control while maintaining constant-current regulation during active cycles.

Key Specifications

Pinout & Package

LM3410XMYX/NOPB is packaged in a 5-pin SOT-23 (DBV) with 3.00 mm × 3.00 mm body size and exposed die attach pad (DAP) connected to GND for thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar constant-current LED driver applications.

Compared with LM3410YMYX/NOPB, LM3410XMYX/NOPB trades slightly reduced maximum duty cycle (92% vs. 95%) for 3× higher switching frequency-enabling smaller passives and faster transient response. Against TPS61061DRVR, it offers higher current drive, integrated compensation, and tighter feedback reference-reducing bill-of-materials and layout risk in production LED systems.

Availability

LM3410XMYX/NOPB is available at Aetrix Electronics and suitable for LED backlighting, automotive display drivers, handheld flash modules, and portable HB-LED lighting requiring stable component supply and long-term manufacturability.

Supply support for LM3410XMYX/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and digital signal processing technologies with focus on reliability, energy efficiency, and system integration.

The LM3410 product line was designed specifically for high-efficiency, space-constrained constant-current LED driving in portable and automotive applications-emphasizing internal integration, thermal robustness, and simplified layout.

FAQ

What is the recommended inductor value for LM3410XMYX/NOPB in a 350-mA, 12-V output boost configuration?

For 350-mA LED current, 5-V input, and 12-V output, TI recommends a 2.2-µH inductor with ≥1.8-A saturation current. This value balances ripple current (~30% of I_LED), physical size, and efficiency. The LM3410XMYX/NOPB's 1.6-MHz operation allows this small inductance while maintaining stability due to internal compensation and current-mode control.

Does LM3410XMYX/NOPB support SEPIC topology, and what modifications are required?

Yes, LM3410XMYX/NOPB supports SEPIC operation per TI's Application Report SNVA213. Required changes include adding a second inductor (L2), coupling capacitor (C2), and reconfiguring feedback to sense output current. No IC-level changes are needed-the same LM3410XMYX/NOPB device operates in both boost and SEPIC modes with appropriate external component selection.

How does the DIM pin function in LM3410XMYX/NOPB, and what PWM frequencies are supported?

The DIM pin on LM3410XMYX/NOPB serves dual functions: logic enable (high = on, low = shutdown) and analog-equivalent PWM dimming. It accepts 1 Hz–25 kHz PWM signals; for best linearity and minimal flicker, 200 Hz–1 kHz is recommended. At 100% duty, LM3410XMYX/NOPB delivers full regulated LED current; at 0%, it enters 80-nA shutdown mode.

What is the purpose of the 190-mV internal reference in LM3410XMYX/NOPB, and how does it affect current accuracy?

The 190-mV internal reference in LM3410XMYX/NOPB defines the target voltage across the external sense resistor (R_SET). Since I_LED = 0.19 V / R_SET, reference accuracy (±12 mV) directly determines current tolerance. Combined with 0.5% R_SET, LM3410XMYX/NOPB achieves ±2% total LED current accuracy-critical for uniform brightness in multi-string displays.

Can LM3410XMYX/NOPB drive more than one LED string, and what layout considerations apply?

LM3410XMYX/NOPB is designed for single-string constant-current operation. Driving multiple strings requires individual current-setting resistors per string and careful thermal management-TI does not recommend parallel strings due to mismatch-induced current imbalance. Layout must minimize SW node loop area, place R_SET adjacent to GND, and connect DAP to solid ground plane via ≥4 vias to maintain thermal performance.