Texas Instruments TPS92200D2RXLR

Overview

TPS92200D2RXLR from Texas Instruments is a 1.5-A synchronous buck LED driver IC with 4-V to 30-V input range, integrated 150-mΩ high-side and 90-mΩ low-side NMOS FETs, 1-MHz switching frequency, 99% maximum duty cycle, and analog dimming controlled by PWM duty cycle (1%–100%). It delivers precise constant-current drive for IR/white LED arrays in facial recognition and surveillance lighting.

For engineers reviewing the TPS92200D2RXLR datasheet, TPS92200D2RXLR pinout, TPS92200D2RXLR application, or TPS92200D2RXLR equivalent, key selection considerations include its VQFN-HR (6) package, 99-mV ±3-mV FB reference voltage, ultra-low 1-μA shutdown current, thermal/auto-retry protection architecture, and dedicated TPS92200D2 analog-dimming-by-PWM-input functionality.

Technical Context

The TPS92200D2RXLR implements peak-current-mode control with full internal compensation-no external loop components required-and uses slope compensation to prevent subharmonic oscillation at high duty cycles. Its PWM dimming input is repurposed as an analog dimming control signal via internal duty-cycle-to-reference-voltage conversion.

Protection logic includes auto-retry hiccup mode triggered by LED open/short, sense-resistor fault, or thermal events (165°C shutdown with 15°C hysteresis), while internal soft-start (0.5 ms) and UVLO (3.5 V rising, 0.2 V hysteresis) ensure robust power-up behavior across industrial temperature ranges (–40°C to +125°C).

Key Specifications

Pinout & Package

VQFN-HR (6-pin) package: 1.50 mm × 2.00 mm, 0.4-mm pitch, wettable flank, thermally enhanced exposed pad (GND-connected). Designed for high-density LED driver layouts with minimal PCB area and improved thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS92200D2DDCR, the TPS92200D2RXLR offers better thermal performance in high-density layouts due to its VQFN-HR package's lower junction-to-board resistance (49.3°C/W vs 41.4°C/W) and wettable flanks, while LM3409HVMM/NOPB trades integration for design flexibility at the cost of BOM expansion and larger solution size.

Availability

TPS92200D2RXLR is available at Aetrix Electronics and suitable for video surveillance systems, facial recognition modules, architectural LED lighting, and medical UV disinfection equipment requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.

Supply support for TPS92200D2RXLR 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 high-reliability LED driver design.

The TPS92200 product line targets compact, high-efficiency constant-current LED drivers for security, biometrics, and industrial lighting-designed specifically for space-constrained, thermally demanding applications where integration, dimming precision, and fault resilience are critical.

FAQ

What dimming method does the TPS92200D2RXLR support?

The TPS92200D2RXLR supports analog dimming controlled by the duty cycle of a digital PWM signal applied to the DIM pin (20–200 kHz range), mapping 1%–100% duty cycle to corresponding LED current levels. Unlike the D1 variant, it does not support direct analog voltage input or separate PWM switching mode. This architecture enables high-resolution brightness control using only a microcontroller GPIO without external DACs or op-amps.

What is the function of the FB pin on the TPS92200D2RXLR?

The FB pin on the TPS92200D2RXLR is the current-sense feedback input that monitors voltage across an external sense resistor (R_SENSE) placed between LED cathode and GND. It regulates LED current by comparing this voltage to an internal 99-mV ±3-mV reference. The TPS92200D2RXLR's error amplifier drives the PWM comparator to maintain precise constant current, enabling tight current matching across multiple LED channels when used in parallel configurations.

Does the TPS92200D2RXLR require external compensation components?

No, the TPS92200D2RXLR features full internal compensation for its peak-current-mode control loop, eliminating the need for external RC networks or type-II/type-III compensators. This simplifies design, reduces bill-of-materials count, and improves layout robustness-especially in high-density LED driver applications where board space is constrained and stability across input/output variations must be guaranteed without tuning.

How does thermal protection work in the TPS92200D2RXLR?

The TPS92200D2RXLR incorporates thermal shutdown protection that disables both high-side and low-side FETs when junction temperature exceeds 165°C (typical), with automatic recovery once temperature falls below 150°C (15°C hysteresis). During overtemperature events, the device enters hiccup mode-shutting down for 60 ms before attempting restart-to prevent cumulative thermal damage while allowing safe cooldown in real-world enclosure environments.

What package type is used for the TPS92200D2RXLR?

The TPS92200D2RXLR uses the VQFN-HR (6) package: a 1.50 mm × 2.00 mm, 0.4-mm pitch, thermally enhanced QFN with wettable flanks and an exposed thermal pad tied to GND. This package delivers superior thermal performance (R_θJB = 49.3°C/W) compared to the SOT-23-THIN option and supports automated optical inspection (AOI) and reflow soldering in high-volume manufacturing.