Texas Instruments TPS92023D

Overview

TPS92023D 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 enables zero-voltage switching in high-efficiency LED drivers for street and stadium lighting.

For engineers reviewing the TPS92023D datasheet, TPS92023D pinout, TPS92023D application, or TPS92023D equivalent, key selection criteria include dead-time programmability via DT pin, RT-pin-based frequency control with ±4% oscillator accuracy, overcurrent/overtemperature protection thresholds, SOIC-8 thermal performance (θJA = 117.3°C/W), and soft-start timing via SS capacitor.

Technical Context

The TPS92023D implements Pulse Frequency Modulation (PFM) to regulate output voltage by dynamically adjusting switching frequency across the resonant tank-enabling ZVS over wide input and load ranges. Its internal oscillator sets minimum frequency (40.04–43.36 kHz) with 4% tolerance and supports clamp-mode operation up to 380 kHz.

Dead time is precisely controlled via a resistor on the DT pin referenced to an internal 2.25-V source, ensuring shoot-through prevention with a hard 120-ns minimum. The OC pin provides dual-threshold overcurrent protection (1 V trip, 2 V latch), while thermal shutdown activates at 160°C with 20°C hysteresis.

Key Specifications

Pinout & Package

TPS92023D is housed in an 8-pin SOIC package (body width 3.9 mm, lead pitch 1.27 mm) with GND-connected exposed pad not present-thermal dissipation relies on PCB copper area under the package body.

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 TPS92023D uniquely combines programmable dead time, variable-frequency PFM, and full protection integration in SOIC-8-making it optimal for cost-sensitive, thermally constrained LED drivers requiring wide-input regulation.

Availability

TPS92023D is available at Aetrix Electronics and suitable for commercial LED lighting, industrial high-bay systems, and outdoor street lighting requiring stable component supply and long-term manufacturability.

Supply support for TPS92023D 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 and embedded processing technologies, with decades of expertise in power management and LED driver innovation.

The TPS92023D belongs to TI's high-performance LED lighting controller product line, designed specifically for resonant topologies in high-efficiency, high-reliability solid-state lighting systems operating from universal AC inputs.

FAQ

What is the primary function of the TPS92023D in an LED lighting system?

The TPS92023D serves as an LLC resonant-switching driver controller that manages half-bridge MOSFETs to deliver regulated constant current to LED strings. It achieves high efficiency (>94%) through zero-voltage switching enabled by variable-frequency PFM control and programmable dead time. In every TPS92023D implementation, this function replaces discrete timing and gate-drive circuitry, reducing component count and improving thermal performance in commercial and industrial LED drivers.

How does the DT pin on the TPS92023D affect system efficiency?

The DT pin on the TPS92023D sets dead time between high-side and low-side gate drive signals using an external resistor. Proper dead-time selection-typically 390–450 ns with R_DT = 16.9 kΩ-minimizes circulating current while ensuring zero-voltage switching across load and temperature. Incorrect dead time causes either shoot-through losses (too short) or excessive magnetizing current (too long). Every TPS92023D design must validate DT resistor value against measured ZVS margin to maximize full-load efficiency.

Can the TPS92023D operate with both fixed and variable switching frequencies?

The TPS92023D supports variable switching frequency only-it does not offer fixed-frequency mode. Its oscillator is inherently current-controlled via the RT pin, enabling PFM-based regulation essential for maintaining ZVS during line and load transients. While minimum frequency is stabilized at ~40 kHz, the TPS92023D cannot be forced into fixed-frequency operation like some legacy controllers. This architecture makes the TPS92023D especially effective in applications such as street lighting where input voltage varies significantly.

What protection features are integrated into the TPS92023D?

The TPS92023D integrates UVLO (9.5–10.5 V), overvoltage protection (18–22 V), overcurrent protection (1 V trip / 2 V latch on OC pin), and overtemperature shutdown (160°C with 20°C hysteresis). These protections act independently and concurrently-e.g., OC latch overrides soft-start if triggered during startup. All fault conditions force GD1/GD2 low and require clearing (e.g., VCC cycle or OC voltage decay) before resuming operation. This comprehensive protection suite is built into every TPS92023D die and requires no external components to activate.

How is soft-start implemented on the TPS92023D, and can it be used for ON/OFF control?

Soft-start on the TPS92023D is implemented via the SS pin: a capacitor to ground sets ramp time, while pulling SS below 1 V disables the controller entirely. During startup, SS charges from internal current sources (175 μA to 1.2 V, then 5 μA to 4 V), controlling frequency ramp from ~125 kHz to final operating point. This dual-role design means every TPS92023D application can use the same SS network for both inrush limiting and system-level enable/disable-eliminating need for separate logic circuitry in smart lighting controls.