Texas Instruments TPS92023DR

Overview

TPS92023DR from Texas Instruments is an LLC resonant-switching driver controller IC for multi-string LED lighting systems, implementing half-bridge topology with programmable dead time (390–450 ns), variable switching frequency (30–380 kHz), and integrated 0.4-A source / 0.8-A sink gate drivers. It operates across –40°C to 125°C and targets high-efficiency commercial/industrial LED drivers.

For engineers reviewing the TPS92023DR datasheet, TPS92023DR pinout, TPS92023DR application, or TPS92023DR equivalent, key selection considerations include its resonant-frequency control via RT pin current, soft-start timing via SS capacitor, overcurrent protection using OC pin voltage thresholds (1 V trip, 2 V latch), and SOIC-8 package compatibility with thermal design constraints (θJA = 117.3°C/W).

Technical Context

The TPS92023DR implements Pulse Frequency Modulation (PFM) for output regulation in LLC resonant converters, where switching frequency is dynamically adjusted based on feedback from the RT pin current to maintain ZVS across input and load variations. Its oscillator supports 30–380 kHz operation with ±4% tolerance at nominal conditions.

Dead time is precisely set via a resistor to the DT pin (2.25-V internal reference), ensuring shoot-through prevention while enabling zero-voltage switching with minimum magnetizing current. The device integrates dual gate drivers with <50 ns on-time mismatch and active low-side pull-down during UVLO/OVP/OTP faults.

Key Specifications

Pinout & Package

TPS92023DR is housed in an SOIC-8 package (body size 3.91 mm × 4.90 mm, 1.75 mm height), with GND on Pin 6 and exposed pad not present. Thermal resistance θJA = 117.3°C/W under JEDEC-standard high-K board conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LLC resonant controller applications.

Compared with UCC28810DR and IRS27951SPBF, the TPS92023DR uniquely combines variable-frequency PFM control, dual-level OC protection, and programmable dead time in SOIC-8-enabling optimal efficiency, safety, and design flexibility for mid-to-high-power LED drivers without added components.

Availability

TPS92023DR is available at Aetrix Electronics and suitable for commercial LED high-bay lighting, industrial area lighting, and street lighting applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS92023DR 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 expertise in LED driver innovation and automotive-grade reliability validation.

The TPS92023DR belongs to TI's LED lighting controller product line, engineered specifically for high-efficiency, thermally robust, and dimmable resonant LED drivers targeting commercial and industrial solid-state lighting infrastructure.

FAQ

What is the primary topology supported by the TPS92023DR?

The TPS92023DR is designed exclusively for LLC resonant half-bridge topologies. It uses Pulse Frequency Modulation (PFM) to regulate output by varying switching frequency in response to feedback, enabling zero-voltage switching (ZVS) across wide input and load ranges. It does not support flyback, buck-boost, or hard-switched half-bridge configurations. The TPS92023DR achieves this through dedicated RT and DT pins that directly interface with resonant tank control networks.

How does the TPS92023DR implement overcurrent protection?

The TPS92023DR provides two-tier overcurrent protection via the OC pin: a 1.0 V threshold triggers immediate gate-driver disable with automatic soft-start recovery when voltage falls below 0.6 V; a 2.0 V threshold causes latched shutdown requiring VCC to drop below UVLO (9.5 V) to reset. This dual-level scheme prevents nuisance tripping during transients while ensuring fail-safe response to hard shorts. The TPS92023DR relies on external sensing networks-typically resistive dividers across the resonant capacitor-to convert tank current into OC pin voltage.

Can the TPS92023DR operate with fixed switching frequency?

No-the TPS92023DR does not support true fixed-frequency operation. Its oscillator is inherently variable and tied to RT pin current, which changes with feedback. While minimum frequency can be clamped (e.g., 30 kHz) using a resistor to ground on RT, the device always adjusts frequency dynamically during regulation. For fixed-frequency LLC control, TI recommends alternatives like the UCC28810DR. The TPS92023DR's architecture prioritizes efficiency optimization over frequency stability, making it unsuitable for EMI-critical applications requiring narrow-band spectral content.

What is the role of the DT pin on the TPS92023DR?

The DT pin on the TPS92023DR sets the dead time between GD1 and GD2 gate drive signals using an external resistor to ground. An internal 2.25-V reference generates current through the resistor, determining dead time (390–450 ns typical). This prevents shoot-through in the half-bridge power stage by enforcing non-overlapping drive pulses. If the DT pin is shorted to ground, the TPS92023DR defaults to a safe minimum dead time of 120 ns. No external capacitor or active circuitry is required-only a single precision resistor.

Does the TPS92023DR require an external gate driver transformer?

Yes-the TPS92023DR's GD1 and GD2 outputs are designed to drive the primary winding of a gate-driver transformer, not MOSFET gates directly. Its 0.4-A source / 0.8-A sink capability matches typical transformer primary impedance requirements. Direct gate connection would exceed safe operating area due to lack of level-shifting and isolation. The TPS92023DR relies on transformer coupling to provide high-side drive, eliminate bootstrap complexity, and inherently prevent shoot-through-making external transformer use mandatory for functional and reliable operation.