Texas Instruments TPS92411PDDA

Overview

TPS92411PDDA from Texas Instruments is a 100-V floating MOSFET switch for offline AC linear LED drivers, functioning as a controlled shunt switch in conjunction with an external linear regulator to achieve >0.9 power factor, <5% current ripple, and phase-dimmable operation up to 70 W. It operates across 7.5–94 V input, features 2-Ω R_DS(on), 200 µA quiescent current, and integrated overvoltage protection (OVP) at ~100 V.

For engineers reviewing the TPS92411PDDA datasheet, TPS92411PDDA pinout, TPS92411PDDA application, or TPS92411PDDA equivalent, this page delivers verified functional context, validated SO PowerPAD-8 pin mapping, confirmed OVP/UVLO thresholds, real-world dimmable luminaire design constraints, and two rigorously cross-checked alternative parts for linear AC/DC LED driver architectures.

Technical Context

The TPS92411PDDA implements a slew-controlled, low-frequency floating switch architecture that monitors VIN vs. VS to dynamically route AC line current either through the LED stack (switch OFF) or around it via the internal MOSFET (switch ON), enabling capacitor-fed LED conduction during zero-crossing intervals. Its dual-threshold control-RSET sets turn-off voltage (~1.25 V reference), RSNS sets turn-on voltage (–4 µA threshold current)-enables precise timing of shunt action without inductive components.

This device requires external blocking diodes and LED-stack capacitors, operates only with discrete or TPS92410-based linear regulators, and relies on system-level thermal management due to its 58.6 °C/W θ_JA in SO PowerPAD-8. The exposed thermal pad must be connected directly to VS for safe junction temperature control up to 150 °C.

Key Specifications

Pinout & Package

TPS92411PDDA uses the SO PowerPAD (8-pin) package (4.89 mm × 3.90 mm), with an exposed thermal pad electrically tied to VS and requiring direct PCB copper connection for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar floating shunt switch applications.

Compared with TPS92411PDDA, TPS92411DDA removes OVP functionality while retaining identical thermal and switching performance, whereas NCP3066DR2G shifts to a fundamentally different inductive topology requiring full schematic and layout rework - making TPS92411PDDA the sole drop-in solution for OVP-enabled linear AC/DC LED drivers.

Availability

TPS92411PDDA is available at Aetrix Electronics and suitable for phase-dimmable LED bulbs, commercial downlights, and outdoor streetlight modules requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial lighting OEMs.

Supply support for TPS92411PDDA 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 ICs, with decades of leadership in LED driver innovation and automotive-grade reliability validation.

TPS92411PDDA belongs to TI's offline LED driver product line, engineered specifically for high-power-factor, low-ripple, inductorless AC/DC linear LED solutions targeting retrofit lamps and commercial luminaires.

FAQ

What is the primary function of the TPS92411PDDA in an LED driver circuit?

The TPS92411PDDA acts as a floating, slew-controlled MOSFET shunt switch that routes AC line current either through the LED stack (when OFF) or around it (when ON), enabling capacitor-fed LED conduction during zero-crossing intervals. It does not regulate current directly but coordinates with an external linear regulator to achieve low-ripple, high-PF operation. This function is intrinsic to the TPS92411PDDA architecture and requires no firmware or digital control.

Does the TPS92411PDDA require external components to operate, and which ones are mandatory?

Yes - the TPS92411PDDA requires four mandatory external components: (1) an RSET resistor between VIN and RSET pins to set turn-off voltage, (2) an RSNS resistor from RSNS to system ground to set turn-on threshold, (3) a blocking diode (200 V rated) between DRAIN and LED anode, and (4) an LED-stack capacitor sized per SLVC516/SLVC517 calculators. These are non-optional per TI's application guidance for TPS92411PDDA.

How does the overvoltage protection (OVP) in the TPS92411PDDA differ from the standard TPS92411DDA?

The TPS92411PDDA integrates OVP that triggers at ~100 V (VIN–VS), closing the internal switch to protect LEDs and capacitors during open-string faults. The TPS92411DDA lacks this feature entirely - it has only UVLO and relies on external circuitry for overvoltage safety. This OVP distinction is explicitly documented in TI's SLUSBQ6B datasheet Section 7.3.1 and defines the "P" suffix in TPS92411PDDA.

Can multiple TPS92411PDDA devices be stacked for higher-voltage LED strings, and what is the maximum supported configuration?

Yes - TPS92411PDDA supports series stacking using its floating VS node architecture. In 230 V_RMS designs, TI validates configurations up to three stacked devices driving 160 V LED strings with cascode FETs. Each device must have independent RSET/RSNS networks and blocking diodes; the exposed thermal pad of each TPS92411PDDA must connect to its local VS node, not system ground.

What thermal design considerations are critical for reliable operation of the TPS92411PDDA in high-power luminaires?

Reliable operation of the TPS92411PDDA requires direct copper connection of its exposed thermal pad to VS, with ≥200 mm² of 2-oz copper pour beneath the SO PowerPAD-8 package. TI specifies θ_JC(bot) = 15 °C/W - meaning junction-to-PCB thermal resistance depends entirely on this pad connection. Without it, θ_JA degrades from 58.6 to >100 °C/W, risking thermal shutdown above 70 °C ambient in 50 W+ designs. This requirement is non-negotiable for TPS92411PDDA.