Texas Instruments TPS92513DGQT

Overview

TPS92513DGQT from Texas Instruments is a 1.5A step-down LED driver IC with integrated 220-mΩ high-side MOSFET, 4.5–42 V input range, ±5% LED current accuracy, and 100 kHz–2 MHz adjustable switching frequency. It delivers stable current to high-brightness LED strings in street lighting and industrial illumination systems.

For engineers reviewing the TPS92513DGQT datasheet, TPS92513DGQT pinout, TPS92513DGQT application, or TPS92513DGQT equivalent, key selection considerations include analog/PWM dual dimming capability, RT/CLK synchronization support, UVLO hysteresis configuration, and thermal shutdown at 165°C with 20°C hysteresis.

Technical Context

The TPS92513DGQT implements peak-current mode control with fixed-frequency operation, enabling precise line/load regulation and simplified compensation design. Its transconductance error amplifier (331 µA/V gain, 2.7 MHz bandwidth) interfaces directly with the ISENSE and COMP pins for current-loop stability.

It supports two dimming modes: analog adjustment via IADJ (0–1.8 V → 0–300 mV ISENSE reference) and PWM dimming via PDIM (100 Hz–1 kHz, >100:1 contrast ratio). The RT/CLK pin operates in resistor-programmed mode (474–513 mV regulated voltage) or PLL-synchronized mode (300–2000 kHz), with automatic fallback to 150 kHz on clock loss.

Key Specifications

Pinout & Package

HVSSOP-10 (DGQ) package with exposed PowerPAD™ thermal pad (5.00 mm × 3.00 mm); requires solder connection of pad to PCB ground plane for thermal performance and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM3409HVMM/NOPB and MPQ4425AGU-AEC1-P, the TPS92513DGQT uniquely integrates dual-path dimming (IADJ + PDIM), PLL synchronization, and 1.5 A capability in an HVSSOP-10 package - making it optimal for industrial and commercial LED systems demanding flexibility, precision, and EMI control.

Availability

TPS92513DGQT 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 traceable sourcing.

Supply support for TPS92513DGQT 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 over 50 years of innovation in industrial and automotive electronics.

The TPS92513DGQT belongs to TI's high-performance LED driver product line, engineered specifically for constant-current regulation in high-reliability, thermally constrained solid-state lighting applications.

FAQ

What is the maximum input voltage rating for the TPS92513DGQT?

The TPS92513DGQT has an absolute maximum input voltage rating of 45 V on the VIN pin. Its recommended operating input range is 4.5 V to 42 V. Exceeding 45 V risks permanent damage. For designs requiring >42 V operation, the TPS92513HV variant (60 V rated) should be used instead of the TPS92513DGQT.

How does the IADJ pin function in the TPS92513DGQT?

The IADJ pin on the TPS92513DGQT sets the LED current reference by applying a voltage from 0 V to 1.8 V, which is internally divided by 6 to generate the ISENSE target voltage (0–300 mV). At 1.2 V on IADJ, the TPS92513DGQT regulates ISENSE to 200 mV, resulting in nominal LED current. The pin is clamped at 1.8 V and requires a 10 nF bypass capacitor for stability.

Can the TPS92513DGQT synchronize its switching frequency to an external clock?

Yes, the TPS92513DGQT 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 (≥51 ns pulse width), the device enters PLL mode and locks to frequencies from 300 kHz to 2 MHz. The internal oscillator resumes control if the external clock stops, defaulting to 150 kHz.

What thermal protection features does the TPS92513DGQT include?

The TPS92513DGQT incorporates thermal shutdown that activates at 165°C junction temperature, with 20°C hysteresis ensuring reliable restart after cooldown. Its HVSSOP-10 PowerPAD™ package achieves 66.7°C/W junction-to-ambient thermal resistance when properly soldered to a 2-in² copper area, enabling 1.5 A operation up to +125°C ambient with adequate PCB copper.

Is the TPS92513DGQT pin-compatible with other members of the TPS92513 family?

Yes, the TPS92513DGQT shares identical pinout and footprint with the TPS92513DRCT (WSON-10) and TPS92513HVDGQT (HV version), though voltage ratings differ. The TPS92513DGQT and TPS92513HVDGQT are electrically identical except for VIN/PH absolute maximum ratings (45 V vs. 65 V), allowing drop-in replacement in 42 V systems where HV margin is unnecessary.