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Texas Instruments TPS92515DGQT
- Part No.:
- TPS92515DGQT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS92515DGQT.pdf
- Description:
- IC LED DRV RGLTR PWM 2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:514
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Product details
Overview
TPS92515DGQT from Texas Instruments is a monolithic buck LED driver IC with integrated 290-mΩ N-channel MOSFET, high-side current sensing, and shunt FET PWM dimming capability. It delivers up to 2 A constant average LED current, operates from 5.5 V to 42 V input, and supports 10,000:1 shunt PWM dimming range for automotive headlamp matrix applications.
For engineers reviewing the TPS92515DGQT datasheet, TPS92515DGQT pinout, TPS92515DGQT application, or TPS92515DGQT equivalent, this device is selected for high-bandwidth, thermally robust LED current regulation in safety-critical lighting where cycle-by-cycle current limiting, no loop compensation, and linear shunt dimming response are required.
Technical Context
The TPS92515DGQT uses constant off-time (COT), peak-current control with hysteric operation-enabling high bandwidth and inherent cycle-by-cycle current limiting without external compensation. Its high-side current sense comparator features 240 mV typical threshold with ±16 mV variation and 75–130 ns falling delay.
Dimming is implemented via three independent methods: analog adjustment through IADJ (0.1–2.2 V), PWM input (0.95–1.05 V threshold), and external shunt FET control synchronized to COFF-derived off-time. The internal N-FET's RDS(on) is 290 mΩ at 25°C and 5 V gate drive, rising to 600 mΩ at 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5 V to 42 V - supports 12 V/24 V automotive battery rails with 5.15 V UVLO fallback after startup. |
| Max Output Current | 2 A average - sustained under thermal management; limited by junction temperature (150°C max) and package RθJA = 56.2°C/W. |
| Current Sense Threshold | 240 mV typ (VIADJ = VCC) - enables precise analog dimming with 10:1 IADJ-to-threshold gain and low-loss milliohm sensing. |
| Shunt PWM Dimming Range | 10,000:1 - achieved via dedicated COFF timing and optimized shunt FET control path, preserving linearity across full range. |
| Thermal Protection | 175°C shutdown with 10°C hysteresis - integrated sensor placed adjacent to internal FET ensures accurate junction monitoring. |
| Package | HVSSOP-10 with exposed thermal pad - 3 mm × 3 mm footprint; bottom thermal pad must be soldered to PCB ground for RθJB = 32.1°C/W. |
| Control Architecture | Constant off-time, peak-current mode - eliminates need for loop compensation; frequency varies with VIN/VLED to maintain constant inductor ripple. |
Pinout & Package
HVSSOP-10 package with exposed thermal pad (3 mm × 3 mm); thermal pad must be connected to PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - COFF | Off-time timer input | Resistor-capacitor network sets OFF-time; voltage ramp derived from VOUT or VCC to maintain constant inductor ripple during shunt dimming. |
| 2 - VCC | Internal 5-V regulator output | Supplies internal logic and gate driver; requires ≥1 µF ceramic decoupling to GND; UVLO at 4.2 V (±0.2 V). |
| 3 - GND | Power and signal reference | Common return for all circuits; thermal pad must be electrically and thermally tied to this node. |
| 4 - BOOT | High-side gate driver supply | Connected between BOOT–SW via ceramic capacitor; diode from VCC to BOOT enables bootstrap charging for N-FET gate drive. |
| 5 - SW | Switch node | Drain of internal N-FET; connects to inductor; carries high di/dt switching current - requires tight layout and Kelvin routing. |
| 6 - DRN | Internal FET drain terminal | Internally connected to CSN node; not externally accessible - used only for high-side current sense path integrity. |
| 7 - CSN | Current sense negative input | Kelvin connection point for sense resistor; low bias current (0 µA typ) and 75 ns delay enable high-accuracy, low-noise sensing. |
| 8 - VIN | Input voltage & sense positive | Primary power input (5.5–42 V); also serves as high-side current sense reference - must be routed with low-inductance path. |
| 9 - PWM | PWM dimming control input | 0.95–1.05 V threshold; 50–150 mV hysteresis prevents noise-induced toggling; pulls down SW when low. |
| 10 - IADJ | Analog current adjust input | 0.1–2.2 V input sets peak current threshold via 10:1 gain; enables 200:1 analog dimming without external DAC. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated N-channel FET | 290-mΩ RDS(on) at 25°C enables >90% efficiency at 2 A with minimal external components. |
| High-side current sensing | Low-offset comparator (240 mV typ) with 75 ns delay supports accurate, noise-immune LED current regulation. |
| Shunt FET PWM dimming | 10,000:1 dimming range with linear response maintained via COFF-controlled off-time ramping during output shorting. |
| No loop compensation required | Constant off-time architecture eliminates external compensation network - reduces BOM count and design iteration time. |
| Thermally enhanced HVSSOP | Exposed thermal pad and RθJB = 32.1°C/W allow 2 A operation in compact 3 mm × 3 mm footprint without heatsink. |
Applications
| Automotive Adaptive Front Lighting | Industrial Machine Vision Illumination |
|---|---|
|
Use Scenario: Dynamic LED matrix headlamps adjusting beam pattern in real time based on vehicle speed and steering angle. IC Role / Device Role / Timing Role: Primary constant-current buck controller regulating individual LED strings; synchronizes shunt FET dimming for pixel-level brightness control. Use Value: Enables 10,000:1 dimming resolution and <200 ns current response for flicker-free, high-contrast adaptive beams. |
Use Scenario: High-intensity strobed lighting for high-speed camera capture in factory automation inspection systems. IC Role / Device Role / Timing Role: Fast-transient LED driver delivering precise 2 A pulses synchronized to camera trigger signals via PWM input. Use Value: Delivers sub-microsecond current rise/fall times and stable 2 A amplitude across 10 kHz–100 kHz strobe frequencies. |
| Agricultural LED Grow Light Arrays | Medical Endoscopic Light Sources |
|
Use Scenario: Multi-channel spectral-tuned lighting for vertical farming, requiring independent dimming per wavelength band. IC Role / Device Role / Timing Role: Constant-current regulator for red/blue/white LED strings; analog dimming via IADJ enables smooth CCT tuning. Use Value: 200:1 analog dimming range and 5.5–42 V input support simplify multi-rail power architecture across large arrays. |
Use Scenario: Compact, low-EMI illumination module inside endoscope handle requiring stable, quiet LED current. IC Role / Device Role / Timing Role: Buck LED driver with integrated FET and high-side sensing - eliminates external switch and improves EMI profile. Use Value: Integrated solution reduces board area by 40% vs discrete FET + controller; thermal pad ensures reliability in confined space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409HV-Q1 | External P-channel FET; 75 V max input; constant off-time control; no integrated current sense amplifier. | Requires external high-side sense and gate driver; suited for higher-voltage (>42 V), lower-current (<1.5 A) designs. | Choose LM3409HV-Q1 when input exceeds 42 V or when discrete FET selection is needed for thermal partitioning. |
| TPS92515HV | Same pinout and architecture; 65 V max input; identical 290-mΩ FET and dimming features. | Direct upgrade path for 48 V industrial or 60 V battery systems; shares same PCB layout but requires HV-rated passives. | Choose TPS92515HV when system VIN may reach 65 V - no redesign needed beyond input capacitor and inductor voltage rating. |
Compared with LM3409HV-Q1, TPS92515DGQT integrates the FET and high-side sense, reducing component count and layout complexity; versus TPS92515HV, it trades 65 V capability for tighter 42 V compliance - ideal for cost-sensitive 12/24 V automotive modules.
Availability
TPS92515DGQT is available at Aetrix Electronics and suitable for automotive headlamp systems, industrial machine vision illuminators, and medical endoscopic light sources requiring stable component supply, AEC-Q100 Grade 1 compliance, and production-ready thermal performance.
Supply support for TPS92515DGQT 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 and embedded processing technologies, with leadership in power management, signal chain, and automotive ICs.
The TPS92515DGQT belongs to TI's high-performance LED driver product line, designed specifically for automotive-grade, high-brightness LED lighting with integrated FET, high-side sensing, and advanced dimming for adaptive and safety-critical applications.
FAQ
What is the maximum continuous output current supported by the TPS92515DGQT?
The TPS92515DGQT supports up to 2 A average LED current continuously when operated within its thermal limits - specifically with junction temperature ≤150°C, ambient ≤125°C, and proper PCB thermal design (HVSSOP thermal pad soldered to ground plane). At 2 A, efficiency exceeds 90% with typical 24 V input and 18 V LED string, assuming optimal inductor and sense resistor selection.
How does the TPS92515DGQT achieve 10,000:1 shunt PWM dimming without color shift?
The TPS92515DGQT achieves 10,000:1 shunt PWM dimming by maintaining constant inductor current ripple during both active and shunted states - using VCC as an alternate COFF ramp source when the output is shorted. This preserves linear current response and avoids LED forward voltage drift, eliminating perceptible color shift across the full dimming range.
Can the TPS92515DGQT operate below 5.5 V input after startup?
Yes - the TPS92515DGQT has a post-startup undervoltage lockout (UVLO) threshold of 5.15 V (±0.25 V), allowing continued operation down to 5.15 V once powered. However, startup requires ≥5.5 V on VIN, and operation below 5.15 V triggers shutdown to protect regulation accuracy and FET gate drive integrity.
What is the purpose of the DRN pin on the TPS92515DGQT?
The DRN pin on the TPS92515DGQT is the internal N-channel FET drain terminal, internally connected to the CSN node. It is not intended for external connection - its role is to complete the high-side current sense path between VIN and CSN, ensuring accurate sensing without parasitic trace resistance affecting measurement precision.
Is the TPS92515DGQT AEC-Q100 qualified?
No - the TPS92515DGQT is the commercial-grade variant. AEC-Q100 Grade 1 qualification applies only to the TPS92515-Q1 and TPS92515HV-Q1 variants. The TPS92515DGQT shares identical electrical specifications and pinout but is characterized for industrial temperature range (–40°C to 125°C ambient) and lacks automotive qualification documentation and stress testing.
TPS92515DGQT 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):
- 5.5V
- Voltage - Supply (Max):
- 42V
- Voltage - Output:
- -
- Current - Output / Channel:
- 2A
- Frequency:
- -
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
TPS92515DGQT FAQ
1.How can I place an order for TPS92515DGQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92515DGQT 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 TPS92515DGQT reliable?
The price and inventory of TPS92515DGQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92515DGQT is usually 5 days.
3.What payment methods are accepted for TPS92515DGQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92515DGQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92515DGQT?
TPS92515DGQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92515DGQT 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 TPS92515DGQT?
For technical support, including TPS92515DGQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92515DGQT requirements.
6.How does Aetrix verify that TPS92515DGQT is sourced from the original manufacturer or authorized distributors?
All TPS92515DGQT 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 TPS92515DGQT meets industry standards.
7.What is the process for return or replacement of TPS92515DGQT?
All TPS92515DGQT units undergo pre-shipment inspection (PSI). If there is an issue with TPS92515DGQT, 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 TPS92515DGQT part is unused and in its original packaging.
Return procedure for TPS92515DGQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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