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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Texas Instruments TPS92512DGQT

Name: TPS92512DGQT
Brand: Texas Instruments
SKU: TPS92512DGQT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS92512DGQT

Manufacturer:: Texas Instruments

Category:: LED Drivers

Package:: 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: TPS92512DGQT.pdf

Description:: IC LED DRVR RGLTR PWM 10HVSSOP

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Product details

Overview

TPS92512DGQT from Texas Instruments is a 2.5A synchronous buck LED driver IC with integrated 200-mΩ high-side MOSFET, 4.5–42 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 TPS92512DGQT datasheet, TPS92512DGQT pinout, TPS92512DGQT application, or TPS92512DGQT equivalent, key selection considerations include analog/PWM dual dimming support, RT/CLK synchronization capability, thermal shutdown at 165°C, and HVSSOP-10 PowerPAD™ package thermal performance (R_θJA = 66.7°C/W).

Technical Context

The TPS92512DGQT implements peak-current mode control with fixed-frequency operation, enabling precise line/load regulation and simplified compensation. Its error amplifier features 331 µA/V transconductance gain and 2.7 MHz bandwidth, supporting fast transient response in LED current regulation loops.

It integrates dual dimming control: IADJ pin accepts 0–1.8 V analog signal to set ISENSE reference (VIADJ/6), while PDIM accepts 100 Hz–1 kHz PWM with 1.34 V logic-high threshold. The RT/CLK pin supports both resistor-programmed frequency (100 kHz–2 MHz) and external clock synchronization (300 kHz–2 MHz) via PLL lock-in within 100 µs.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5 V to 42 V - supports wide-range DC supplies including 12 V, 24 V, and 36 V industrial bus rails
Max Output Current	2.5 A - drives high-brightness LED strings up to 7 LEDs in series at 1.5 A (V_OUT = 23 V)
LED Current Accuracy	±5% - ensures consistent luminance across multiple fixtures without per-unit calibration
Switching Frequency	100 kHz to 2 MHz - enables optimization of inductor size vs. efficiency; minimum on-time 140 ns limits max input voltage
Efficiency	Up to 97.5% - measured at 24 V input, 1.5 A output, 7-LED string; peaks near 40–50 V input
Thermal Shutdown	165°C with 20°C hysteresis - protects against sustained overloads or poor PCB heatsinking
Package	HVSSOP-10 with PowerPAD™ - 5.00 mm × 3.00 mm footprint; exposed pad requires direct GND connection for thermal conduction

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
BOOT	Bootstrap supply node	Drives high-side MOSFET gate; requires 0.1 µF ceramic capacitor between BOOT and PH
VIN	Main power input	Supplies internal regulators and high-side switch; 4.5–42 V operating range
UVLO	Enable/disable control	Resistor-divider input sets start/stop voltage; 1.22 V rising threshold with hysteresis
PDIM	PWM dimming input	Directly gates internal driver; 0.79 V low / 1.45 V high logic thresholds; supports >100:1 contrast
RT/CLK	Frequency programming/sync	Resistor-to-GND sets f_SW; external clock >300 kHz synchronizes via PLL with 100 µs lock time
PH	Switch node	Source of integrated high-side MOSFET; connects to inductor and LED cathode
GND	Signal and power return	Reference for all analog circuitry; must tie to exposed PowerPAD™ pad
COMP	Error amplifier output	Connects to RC compensation network; 0.1 µF to GND recommended for stability
ISENSE	Current sense input	Inverting input of g_m amplifier; monitors R_SENSE voltage for LED current regulation
IADJ	Analog dimming reference	Sets ISENSE target voltage as V_IADJ/6; 0–1.8 V range yields 0–300 mV ISENSE setpoint

Key Features

Feature	Design Value
Dual independent dimming	Simultaneous analog (IADJ) and PWM (PDIM) control enables >10:1 and >100:1 dimming ratios respectively
Integrated high-side MOSFET	200-mΩ R_DS(on) at 25°C reduces external component count and improves thermal efficiency
Programmable UVLO with hysteresis	Adjustable start/stop via UVLO pin resistor divider prevents brown-out oscillation during supply sag
Cycle-by-cycle overcurrent protection	6 A current limit triggers before thermal shutdown, protecting against shorted LED strings or sense resistors
External clock synchronization	RT/CLK pin accepts 300 kHz–2 MHz square wave to eliminate beat frequencies in multi-channel LED systems

Applications

Street Lighting	Emergency/Exit Lighting
Use Scenario: Outdoor LED luminaires powered from 24–48 V DC distribution lines with ambient temperature extremes from –40°C to +85°C. IC Role / Device Role / Timing Role: Constant-current buck regulator controlling 3–7 series white LEDs; provides analog dimming for dusk-to-dawn control and PWM for emergency strobe signaling. Use Value: ±5% current accuracy maintains uniform lumen output across fixture population; 165°C thermal shutdown prevents field failures in enclosed pole-top housings.	Use Scenario: Battery-backed exit signs requiring fail-safe illumination during AC mains loss, operating from 12 V sealed lead-acid or LiFePO₄ packs. IC Role / Device Role / Timing Role: Primary LED driver during battery mode; UVLO disables device when battery drops below 10.5 V to preserve capacity. Use Value: 4.5 V minimum input allows full brightness down to near-end-of-discharge; PDIM pin enables synchronized flashing without microcontroller intervention.
Retail Lighting	Transportation Lighting
Use Scenario: Adjustable-track LED spotlights in commercial stores where color consistency and smooth dimming are critical for merchandise presentation. IC Role / Device Role / Timing Role: High-accuracy current source for COB LEDs; IADJ pin driven by 0–10 V DALI interface for analog dimming; RT/CLK synchronized to building-wide 500 kHz clock. Use Value: 0.18–1.8 V IADJ range enables 10:1 analog dimming with <1% current variation; synchronized switching eliminates audible beat tones in dense fixture arrays.	Use Scenario: Interior cabin lighting in buses and railcars using 24 V nominal vehicle batteries subject to load dump transients up to 60 V. IC Role / Device Role / Timing Role: Robust LED driver tolerant of 42 V abs max rating; UVLO configured for 18 V start/15 V stop to ride through cranking dips. Use Value: Integrated 200-mΩ MOSFET withstands repeated 6 A current limit events; PowerPAD™ package dissipates heat in confined ceiling cavities without heatsinks.

Street Lighting

Emergency/Exit Lighting

Use Scenario: Outdoor LED luminaires powered from 24–48 V DC distribution lines with ambient temperature extremes from –40°C to +85°C.

IC Role / Device Role / Timing Role: Constant-current buck regulator controlling 3–7 series white LEDs; provides analog dimming for dusk-to-dawn control and PWM for emergency strobe signaling.

Use Value: ±5% current accuracy maintains uniform lumen output across fixture population; 165°C thermal shutdown prevents field failures in enclosed pole-top housings.

Use Scenario: Battery-backed exit signs requiring fail-safe illumination during AC mains loss, operating from 12 V sealed lead-acid or LiFePO₄ packs.

IC Role / Device Role / Timing Role: Primary LED driver during battery mode; UVLO disables device when battery drops below 10.5 V to preserve capacity.

Use Value: 4.5 V minimum input allows full brightness down to near-end-of-discharge; PDIM pin enables synchronized flashing without microcontroller intervention.

Retail Lighting

Transportation Lighting

Use Scenario: Adjustable-track LED spotlights in commercial stores where color consistency and smooth dimming are critical for merchandise presentation.

IC Role / Device Role / Timing Role: High-accuracy current source for COB LEDs; IADJ pin driven by 0–10 V DALI interface for analog dimming; RT/CLK synchronized to building-wide 500 kHz clock.

Use Value: 0.18–1.8 V IADJ range enables 10:1 analog dimming with <1% current variation; synchronized switching eliminates audible beat tones in dense fixture arrays.

Use Scenario: Interior cabin lighting in buses and railcars using 24 V nominal vehicle batteries subject to load dump transients up to 60 V.

IC Role / Device Role / Timing Role: Robust LED driver tolerant of 42 V abs max rating; UVLO configured for 18 V start/15 V stop to ride through cranking dips.

Use Value: Integrated 200-mΩ MOSFET withstands repeated 6 A current limit events; PowerPAD™ package dissipates heat in confined ceiling cavities without heatsinks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM3409HVMM/NOPB	4.5–75 V input, 1.25 A max, no integrated MOSFET - requires external FET and gate driver	Higher voltage tolerance but lower current; suited for single-LED or low-current strings	Select when >42 V input or discrete FET control is required; not drop-in due to different pinout and external component needs
MPQ4425AGU-AEC1-P	3.3–60 V input, 2.5 A, AEC-Q100 qualified, 500 kHz fixed f_SW, no IADJ pin	Automotive-grade reliability; lacks analog dimming - PWM-only dimming support	Choose for automotive interior lighting where AEC-Q100 compliance is mandatory; no analog dimming capability limits architectural flexibility

Compared with LM3409HVMM/NOPB and MPQ4425AGU-AEC1-P, the TPS92512DGQT uniquely combines integrated 2.5 A MOSFET, dual analog/PWM dimming, and programmable frequency in HVSSOP-10 - enabling compact, high-accuracy LED drivers without external FETs or complex compensation networks.

Availability

TPS92512DGQT is available at Aetrix Electronics and suitable for street lighting, emergency signage, and retail illumination requiring stable component supply, long-term BOM continuity, and industrial temperature grade (-40°C to +125°C).

Supply support for TPS92512DGQT 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 company specializing in analog, embedded processing, and power management ICs, with leadership in high-reliability LED driver solutions.

The TPS92512DGQT belongs to TI's high-voltage buck LED driver product line, designed specifically for constant-current driving of medium-to-high power LED strings in outdoor, industrial, and transportation lighting where precision dimming and thermal robustness are essential.

FAQ

What is the maximum LED string voltage supported by the TPS92512DGQT?

The TPS92512DGQT does not specify a maximum output voltage directly, but its PH pin absolute maximum rating is 45 V. With typical forward voltages of 3.0–3.6 V per white LED, this supports up to 12–15 LEDs in series at room temperature. Derating is required at elevated junction temperatures due to reduced R_DS(on) headroom and thermal limits. Always verify V_PH = V_IN – V_{LED_STRING} remains within safe operating area per datasheet Section 7.1.

How does the TPS92512DGQT achieve ±5% LED current accuracy?

The TPS92512DGQT achieves ±5% LED current accuracy through factory-trimmed internal reference and matched current-sense amplifier architecture. The ISENSE pin compares voltage across an external sense resistor to a precision reference derived from the IADJ pin (V_IADJ/6). This architecture minimizes drift over temperature (±210 mV typical ISENSE at 125°C) and rejects VIN variations, ensuring stable current regulation across 4.5–42 V input range without external calibration.

Can the TPS92512DGQT synchronize to an external clock while maintaining analog dimming control?

Yes, the TPS92512DGQT fully supports concurrent external clock synchronization and analog dimming. The RT/CLK pin handles clock input independently of the IADJ pin, which controls the ISENSE reference voltage. When synchronized to an external 500 kHz clock, the device maintains full 0–1.8 V analog dimming range on IADJ and preserves ±5% current accuracy. No timing interaction occurs between synchronization and analog control paths.

What is the minimum recommended ISENSE sense resistor value for the TPS92512DGQT?

The minimum recommended ISENSE sense resistor value for the TPS92512DGQT is determined by the 300 mV maximum ISENSE voltage and desired LED current. For 2.5 A output, R_SENSE = 300 mV / 2.5 A = 120 mΩ. However, TI recommends ≥200 mΩ to maintain accuracy under temperature drift and noise. Using 200 mΩ yields 1.5 A max current at full IADJ (1.8 V → 300 mV), aligning with typical application curves. Lower values increase power loss and reduce noise margin.

Does the TPS92512DGQT require external compensation components?

Yes, the TPS92512DGQT requires an external capacitor from COMP to GND for loop stability. A 0.1 µF ceramic capacitor is recommended for most applications; values as low as 0.01 µF may be used for faster transient response if stability is verified. No series resistor or additional capacitor is needed - the internal transconductance amplifier and peak-current mode control simplify compensation versus voltage-mode controllers. The COMP pin must not be left floating.

TPS92512DGQT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Down (Buck)

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 4.5V

Voltage - Supply (Max):: 42V

Voltage - Output:: 45V

Current - Output / Channel:: 2.5A (Switch)

Frequency:: 2MHz

Dimming:: PWM

Applications:: Lighting

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-HVSSOP

TPS92512DGQT FAQ

1.How can I place an order for TPS92512DGQT through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS92512DGQT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TPS92512DGQT reliable?

The price and inventory of TPS92512DGQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92512DGQT is usually 5 days.

3.What payment methods are accepted for TPS92512DGQT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92512DGQT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS92512DGQT?

TPS92512DGQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS92512DGQT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TPS92512DGQT?

For technical support, including TPS92512DGQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92512DGQT requirements.

6.How does Aetrix verify that TPS92512DGQT is sourced from the original manufacturer or authorized distributors?

All TPS92512DGQT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS92512DGQT meets industry standards.

7.What is the process for return or replacement of TPS92512DGQT?

All TPS92512DGQT units undergo pre-shipment inspection (PSI). If there is an issue with TPS92512DGQT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TPS92512DGQT part is unused and in its original packaging.

Return procedure for TPS92512DGQT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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