Texas Instruments TPS92512HVDGQT

Overview

TPS92512HVDGQT from Texas Instruments is a 2.5 A, 4.5–60 V input, fixed-frequency peak-current-mode buck LED driver with integrated 200 mΩ high-side MOSFET, ±5% LED current accuracy, and dual dimming (analog IADJ + PWM PDIM) for street lighting and industrial illumination systems.

For engineers reviewing the TPS92512HVDGQT datasheet, TPS92512HVDGQT pinout, TPS92512HVDGQT application, or TPS92512HVDGQT equivalent, key selection criteria include its 100 kHz–2 MHz programmable switching frequency, 0–300 mV adjustable ISENSE reference via IADJ, UVLO hysteresis configuration capability, thermal shutdown at 165°C, and HVSSOP-10 PowerPAD™ package with exposed thermal pad.

Technical Context

The TPS92512HVDGQT implements constant-frequency peak-current-mode control with cycle-by-cycle overcurrent protection and internal transconductance error amplifier (g_M = 331 µA/V). Its RT/CLK pin supports both resistor-programmed frequency (100–2000 kHz) and external clock synchronization (300–2000 kHz) via PLL lock-in within 100 µs.

It features dedicated analog dimming via IADJ (0–1.8 V input → 0–300 mV ISENSE setpoint, scaled 1:6) and independent PWM dimming on PDIM with 100 Hz–1 kHz support and fast recovery using COMP clamping and sample-and-hold. The device operates in continuous conduction mode (CCM) for highest analog dimming accuracy and includes BOOT-PH under-voltage lockout (1.99–2.40 V falling threshold).

Key Specifications

Pinout & Package

HVSSOP-10 PowerPAD™ package (5.00 mm × 3.00 mm) with exposed thermal pad electrically connected to GND for enhanced thermal dissipation in high-power LED applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM3409HVMM/NOPB and MPQ4425AGU-AEC1-P, the TPS92512HVDGQT uniquely combines 60 V input, integrated 200 mΩ MOSFET, ±5% current accuracy, and dual analog+PWM dimming in HVSSOP-10-making it optimal for industrial and commercial LED systems requiring simplicity, precision, and flexible brightness control.

Availability

TPS92512HVDGQT is available at Aetrix Electronics and suitable for street lighting, emergency/exit lighting, and retail illumination requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS92512HVDGQT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TPS92512HVDGQT belongs to TI's high-voltage LED driver product line, engineered specifically for efficient, accurate, and reliable constant-current regulation in outdoor and commercial solid-state lighting applications.

FAQ

What is the maximum input voltage rating for the TPS92512HVDGQT?

The TPS92512HVDGQT has an absolute maximum input voltage rating of 65 V on the VIN pin, with recommended operation up to 60 V. This 60 V upper limit distinguishes it from the standard TPS92512 (42 V max) and enables use in 48 V DC systems with transient headroom. Exceeding 65 V risks permanent damage per the Absolute Maximum Ratings table in the SLVSCT1B datasheet.

How does the IADJ pin function in the TPS92512HVDGQT?

The IADJ pin on the TPS92512HVDGQT sets the LED current regulation point by defining the target voltage at the ISENSE pin: V_ISENSE = V_IADJ/6. With an input range of 0–1.8 V, it yields a 0–300 mV ISENSE reference, supporting analog dimming down to ~10% of full scale. For highest accuracy, TI specifies optimal performance between 180–1800 mV on IADJ, and recommends decoupling with a 10 nF capacitor to ground.

Can the TPS92512HVDGQT synchronize to an external clock, and what are the timing requirements?

Yes, the TPS92512HVDGQT can synchronize to an external clock via the RT/CLK pin. The input must swing below 0.63 V (low threshold) and above 1.81 V (high threshold), with minimum pulse widths of 51 ns (on) and 100 ns (off). Synchronization range is 300–2000 kHz, and PLL lock-in completes within 100 µs. AC coupling via 470 pF capacitor and 4 kΩ series resistor is required to suppress jitter and ensure robust operation.

What thermal considerations apply to the TPS92512HVDGQT in continuous operation?

The TPS92512HVDGQT features thermal shutdown at 165°C with 20°C hysteresis, and its HVSSOP-10 PowerPAD™ package achieves 37.5°C/W junction-to-board thermal resistance. To maintain reliability, the PCB must connect the exposed pad directly to a large copper pour tied to GND. At 2.5 A output and 24 V input, typical power dissipation is ~1.2 W; proper thermal layout keeps junction temperature below 125°C under worst-case ambient conditions.

Does the TPS92512HVDGQT support both analog and PWM dimming simultaneously?

Yes, the TPS92512HVDGQT supports simultaneous analog dimming via the IADJ pin and PWM dimming via the PDIM pin-enabling hybrid dimming strategies. Analog dimming adjusts the baseline current setpoint (0–300 mV ISENSE), while PWM dimming rapidly enables/disables the switch to modulate average current. This combination achieves >10:1 analog range plus >100:1 PWM contrast without color shift or audible noise, as confirmed in Figures 5 and 6 of the SLVSCT1B datasheet.