Texas Instruments TPS92411PDBVT

Overview

TPS92411PDBVT from Texas Instruments is a 100-V floating MOSFET switch IC designed for offline AC linear LED drivers in phase-dimmable luminaires. It integrates a 2-Ω R_DS(on) switch, supports 7.5–94 V input range, delivers ≤200 µA quiescent current, and enables low-ripple LED current without inductors. It operates with discrete linear regulators or the TPS92410 to achieve >0.9 power factor in 120 VAC lamp designs.

For engineers reviewing the TPS92411PDBVT datasheet, TPS92411PDBVT pinout, TPS92411PDBVT application, or TPS92411PDBVT equivalent, key selection criteria include its floating VS-referenced architecture, OVP-enabled protection (TPS92411P variant), slew-controlled switching for EMI reduction, and compatibility with multi-stack LED topologies up to 70 W.

Technical Context

The TPS92411PDBVT implements a floating high-side switch topology where all terminals-VIN, RSET, RSNS, DRAIN, and VS-are referenced to the device's internal floating ground (VS). Its functional modes include UVLO activation at 6.5 V, RSET-threshold–controlled switch turn-off (1.25 V reference), and RSNS-threshold–triggered turn-on (−4 µA sensing current).

Unlike self-contained controllers, the TPS92411PDBVT requires external current regulation-either via the companion TPS92410 or a discrete linear regulator-and relies on external RC networks to set precise voltage trip points (e.g., VRSET ≈ V_LED + 6–10 V, VRSNS = 4–6 V) for synchronized stack switching across rectified AC waveforms.

Key Specifications

Pinout & Package

TPS92411PDBVT uses the SO PowerPAD (DDA) 8-pin package (4.89 mm × 3.90 mm) with exposed thermal pad connected to VS. The package supports higher power dissipation than SOT-23-5 and enables luminaires ≥70 W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar floating high-side switch applications.

Compared with TPS92411DBVR, the TPS92411PDBVT offers higher power capability and integrated OVP but requires larger board area; compared with NCP3066DR2G, it eliminates inductors and feedback complexity but cannot provide isolation or wide-input-range DC-DC conversion.

Availability

TPS92411PDBVT is available at Aetrix Electronics and suitable for LED lamps, downlights, commercial luminaires, and phase-dimmable troffer fixtures requiring stable component supply across long production lifecycles.

Supply support for TPS92411PDBVT 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 specializing in analog, embedded processing, and power management technologies, with decades of experience in lighting control ICs and high-reliability power solutions.

The TPS92411 product line delivers floating high-voltage switches for AC-linear LED drivers-designed specifically to replace magnetic-based topologies in cost- and size-sensitive residential and commercial lighting applications.

FAQ

What is the primary function of the TPS92411PDBVT in an LED driver circuit?

The TPS92411PDBVT acts as a floating high-side MOSFET switch that shunts LED current during portions of the AC cycle, enabling linear regulation without inductors. It does not regulate current directly but sequences conduction and bypass phases using RSET and RSNS thresholds-working with external linear regulators like the TPS92410 or discrete FETs to achieve low-ripple, high-PF LED drive. Its VS-referenced architecture simplifies integration into multi-stack topologies.

Does the TPS92411PDBVT include overvoltage protection, and how does it differ from the standard TPS92411?

Yes, the TPS92411PDBVT includes integrated overvoltage protection (OVP) that activates at ~100 V (V_VIN – V_VS) to close the internal switch and protect LEDs and capacitors during open-circuit failures. This feature is exclusive to the "P" suffix variant; the base TPS92411 lacks OVP and relies on external clamping. The TPS92411PDBVT's OVP threshold has ±2 V tolerance over temperature, and LED stack voltages should remain ≤94 V to ensure safe margin below the 105 V absolute maximum rating.

How is the switching timing controlled in the TPS92411PDBVT?

Switching timing in the TPS92411PDBVT is controlled by two independent analog comparators: one monitors the RSET pin voltage against a 1.25 V internal reference to trigger switch turn-off (LED conduction phase), and another monitors RSNS current (−4 µA threshold) to trigger turn-on (capacitor discharge phase). External resistors set precise trip points-e.g., VRSET ≈ V_LED + 6–10 V and VRSNS = 4–6 V-enabling synchronized multi-stack operation across rectified AC waveforms without microcontroller intervention.

Can the TPS92411PDBVT be used with 230 VAC inputs?

Yes, the TPS92411PDBVT supports 230 VAC inputs when used in properly designed phase-dimmable linear drivers. The datasheet provides validated 230 VAC reference designs (e.g., 16 W input) using stacked LED configurations (e.g., 40 V / 80 V / 160 V) and adjusted RSET/RSNS thresholds (6 V RSNS, +9 V headroom for RSET). Critical considerations include using ≥200 V blocking diodes, ≥400 V-rated capacitors, and ensuring peak line voltage (≈325 V) remains within the 105 V absolute maximum rating of VIN–VS via proper voltage division and clamping.

What thermal management guidance applies to the TPS92411PDBVT in high-power designs?

The TPS92411PDBVT uses an SO PowerPAD (DDA) package with θ_JA = 58.6°C/W and θ_JC(bot) = 15°C/W. For ≥70 W luminaires, the exposed thermal pad must be soldered directly to a large copper pour tied to VS-no thermal vias to inner layers are required, but ≥6 thermal vias (0.3 mm diameter) beneath the pad improve heat transfer. Junction temperature must stay ≤150°C; at 100 mA drain current and 2 Ω R_DS(on), power dissipation is ~20 mW-making thermal design manageable even in enclosed troffer fixtures with 55°C ambient.