Texas Instruments TPS92512HVDGQR

Overview

TPS92512HVDGQR from Texas Instruments is a 2.5A step-down (buck) LED driver IC with integrated 200-mΩ high-side MOSFET, 4.5–60 V input range, ±5% LED current accuracy, and 100 kHz–2 MHz programmable switching frequency. It delivers stable constant-current drive for multi-LED strings in street lighting and industrial illumination systems.

For engineers reviewing the TPS92512HVDGQR datasheet, TPS92512HVDGQR pinout, TPS92512HVDGQR application, or TPS92512HVDGQR equivalent, key selection criteria include its HVSSOP-10 PowerPAD™ package, dual dimming support (analog IADJ + PWM PDIM), adjustable UVLO, cycle-by-cycle overcurrent protection, and thermal shutdown at 165°C.

Technical Context

The TPS92512HVDGQR implements peak-current mode control with fixed-frequency operation, enabling excellent line and load regulation while minimizing output capacitance requirements. Its internal oscillator supports resistor-programmed (RT/CLK) or external clock synchronization (300 kHz–2 MHz), reducing beat frequencies in multi-converter systems.

It features a transconductance error amplifier (g_M = 331 µA/V, bandwidth = 2.7 MHz) driving a current-sense comparator, with dedicated analog current adjust (IADJ → ISENSE scaling at 1/6) and independent PWM dimming logic that preserves COMP voltage during off-time via sample-and-hold.

Key Specifications

Pinout & Package

HVSSOP-10 package with exposed PowerPAD™ thermal pad (5.00 mm × 3.00 mm); requires direct PCB copper connection to GND for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM3410XMYX/NOPB and MPQ4425AGU-AEC1-P, the TPS92512HVDGQR uniquely combines 60 V input rating, integrated IADJ scaling, HVSSOP PowerPAD™ thermal management, and dual-dimming architecture-making it optimal for high-reliability, high-voltage industrial LED systems where board space and thermal headroom are constrained.

Availability

TPS92512HVDGQR is available at Aetrix Electronics and suitable for street lighting, emergency/exit lighting, and transportation lighting requiring stable component supply, long lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS92512HVDGQR 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 LED driver innovation and automotive-grade reliability.

The TPS92512HVDGQR belongs to TI's high-voltage buck LED driver product line, designed specifically for industrial, commercial, and transportation lighting systems demanding robust input voltage range, accurate current regulation, and flexible dimming control.

FAQ

What is the maximum input voltage rating for the TPS92512HVDGQR?

The TPS92512HVDGQR has an absolute maximum input voltage rating of 65 V, with recommended operating range from 4.5 V to 60 V. This 60 V upper limit distinguishes it from the standard TPS92512 (42 V max) and enables compatibility with 48 V DC systems including transient surges and load-dump conditions commonly found in industrial and transportation applications. The device remains functional and protected within this range when proper PCB layout and thermal management are applied.

How does the IADJ pin control LED current in the TPS92512HVDGQR?

The IADJ pin on the TPS92512HVDGQR sets the target voltage at the ISENSE pin using a precise 1:6 scaling ratio - V_ISENSE = V_IADJ/6. With IADJ voltage adjustable from 0.18 V to 1.8 V, this yields an ISENSE range of 30 mV to 300 mV, corresponding to full-scale LED currents up to 2.5 A depending on the external sense resistor value. The relationship is linear and monotonic, enabling accurate analog dimming with minimal drift over temperature.

Can the TPS92512HVDGQR synchronize its switching frequency to an external clock?

Yes, the TPS92512HVDGQR supports external clock synchronization via the RT/CLK pin. When driven with a square wave transitioning below 0.63 V and above 1.81 V (with ≥51 ns pulse width), the internal PLL locks to the external signal within 100 µs. The synchronization range is 300 kHz to 2 MHz. This feature eliminates beat frequencies in multi-driver systems and simplifies EMI filter design by ensuring all converters operate at a common frequency.

What thermal management considerations apply to the TPS92512HVDGQR?

The TPS92512HVDGQR uses an HVSSOP-10 package with an exposed PowerPAD™ thermal pad that must be soldered directly to a large PCB copper area tied to GND. Thermal resistance from junction to board (R_θJB) is 37.5°C/W. To maintain safe operation at 2.5 A, designers should ensure adequate copper area (≥250 mm² recommended), minimize trace resistance to GND, and avoid thermal isolation. Junction temperature must stay ≤125°C for continuous operation and ≤165°C before thermal shutdown activates.

Does the TPS92512HVDGQR support both analog and PWM dimming simultaneously?

Yes, the TPS92512HVDGQR supports concurrent analog and PWM dimming: IADJ sets the maximum current level (e.g., 1.5 A), while PDIM modulates the average output current via duty cycle (e.g., 50% duty → 0.75 A average). The two controls are independent - PWM dimming preserves the analog-set current amplitude during ON periods, enabling >100:1 total dimming range without color shift or regulation instability.