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Texas Instruments TPS92515QDGQRQ1
- Part No.:
- TPS92515QDGQRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS92515QDGQRQ1.pdf
- Description:
- IC LED DRV RGLTR PWM 2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS92515QDGQRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified automotive buck LED driver with integrated 290-mΩ N-channel FET, high-side current sensing, and shunt FET PWM dimming capability. It delivers constant average LED current up to 2 A across 5.5 V–42 V input, supports 10,000:1 shunt PWM dimming, and operates in continuous or discontinuous conduction mode without loop compensation - used in adaptive front lighting systems (AFS) and DRL modules.
For engineers reviewing the TPS92515QDGQRQ1 datasheet, TPS92515QDGQRQ1 pinout, TPS92515QDGQRQ1 application, or TPS92515QDGQRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed dimming performance metrics, thermal shutdown behavior at 175°C, and real-world automotive lighting implementation constraints including VIN UVLO hysteresis (150–225 mV) and COFF-based off-time control.
Technical Context
The TPS92515QDGQRQ1 uses constant off-time (COT), peak-current control with a low-offset high-side comparator for precise LED current regulation. Its hysteretic architecture enables high bandwidth and inherent cycle-by-cycle current limiting without external compensation.
It implements dual-path off-time generation: COFF pin voltage ramps from VOUT (for constant ripple during normal operation) or VCC (during shunt-FET dimming when output is shorted), ensuring linear dimming response across full 10,000:1 range. The internal 290-mΩ N-FET and integrated BOOT charge circuit support efficient high-side switching up to 2 A average current.
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 VIN UVLO falling threshold for cold-crank resilience. |
| Max Output Current | 2 A average - sustained under thermal management; limited by junction temperature (150°C max operating, 175°C shutdown). |
| Shunt PWM Dimming Ratio | 10,000:1 - enables ultra-fine brightness control in matrix LED headlamps without external FETs or timing ICs. |
| Current Sense Threshold | 220–251 mV (typ 240 mV) - adjustable via IADJ pin; enables analog dimming over 200:1 range with 0.1 V/V gain scaling. |
| Off-Time Control | COFF pin sets off-time via RC network; 1.00 V threshold with 68–120 ns delay - ensures stable CCM/DCM transition and ripple linearity. |
| Thermal Protection | 175°C shutdown with 10°C hysteresis - protects against thermal runaway in enclosed headlamp housings. |
| FET RDS(on) | 290 mΩ (typ) at 25°C, 5 V BOOT - defines conduction loss and dropout margin; rises to 600 mΩ at 150°C. |
Pinout & Package
TPS92515QDGQRQ1 is housed in a thermally enhanced HVSSOP-10 package (3 mm × 3 mm) with exposed thermal pad connected to GND. The 10-pin layout supports high-current routing and PCB-level thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - COFF | Off-time timing input | RC network sets converter off-time; connects to VOUT (normal) or VCC (shunt dimming) to maintain constant inductor ripple. |
| 2 - VCC | 5-V regulated output | Supplies internal logic and gate driver; requires ≥1 µF ceramic decoupling to GND; UVLO at 4.0–4.4 V. |
| 3 - GND | Power and signal reference | Common return for current sense, PWM, and thermal pad; must be low-impedance connection to minimize noise coupling. |
| 4 - BOOT | High-side gate drive supply | Charged via diode from VCC to SW; powers internal N-FET driver; UVLO at 2.0–3.5 V disables gate drive. |
| 5 - SW | Internal FET source node | Switching node connecting to output inductor; carries high di/dt; requires tight layout with minimal parasitic inductance. |
| 6 - DRN | Internal FET drain | Connected internally to CSN node; forms high-side current sense path with external sense resistor between VIN and CSN. |
| 7 - CSN | Current sense negative input | Kelvin-connected to sense resistor; low bias current (±5 µA) and 75–130 ns falling delay impact current accuracy. |
| 8 - VIN | Input voltage & sense positive | Primary power input (5.5–42 V); also serves as high-side current sense reference; UVLO hysteresis 150–225 mV. |
| 9 - PWM | PWM dimming enable | Active-high digital input; 0.95–1.05 V threshold with 50–150 mV hysteresis; pulls down SW when low for forced off. |
| 10 - IADJ | Analog current setpoint | Adjusts peak current threshold (220–251 mV range) via external divider or reference; 0.1 V/V gain enables 200:1 analog dimming. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures from –40°C to +125°C - suitable for under-hood and headlamp module deployment. |
| Integrated N-channel FET | 290-mΩ (typ) RDS(on) eliminates external switch and reduces BOM count - enables compact 2 A LED driver designs. |
| High-side current sensing | Low-offset comparator with 220–251 mV threshold - avoids ground-referenced sense errors and supports floating LED strings. |
| Shunt FET PWM dimming | 10,000:1 dimming ratio with linear response - enables pixel-level control in switched-matrix AFS without external dimming controllers. |
| No loop compensation required | Constant off-time architecture - simplifies design, improves transient response, and eliminates stability analysis for production lighting systems. |
Applications
| Adaptive Front Lighting System (AFS) | Daytime Running Light (DRL) Module |
|---|---|
|
Use Scenario: Dynamic beam shaping using individually addressable LED segments in automotive headlamps. IC Role / Device Role / Timing Role: Constant-current buck regulator controlling per-segment LED current while synchronizing shunt-FET dimming with matrix controller signals. Use Value: Enables 10,000:1 brightness resolution per segment for glare-free high-beam assist and cornering functions. |
Use Scenario: High-reliability, thermally constrained DRL assembly mounted behind headlamp lens. IC Role / Device Role / Timing Role: Primary LED current regulator with integrated thermal shutdown and VIN UVLO for battery voltage transients. Use Value: Maintains ±5% current accuracy across –40°C to +125°C ambient with no external compensation components. |
| Rear Combination Lamp | Turn Signal Flasher Driver |
|
Use Scenario: Multi-function rear lamp integrating brake, tail, and reverse lighting on shared PCB. IC Role / Device Role / Timing Role: Single-chip solution delivering programmable current levels per function via IADJ and PWM inputs. Use Value: Reduces component count by eliminating discrete current sources and enables fast PWM dimming for dynamic signature effects. |
Use Scenario: Automotive turn signal with variable flash rate and brightness modulation for hazard or sequential indicators. IC Role / Device Role / Timing Role: High-bandwidth current regulator synchronized to vehicle CAN/LIN command timing. Use Value: Supports >1 kHz PWM dimming frequency without audible noise - critical for flicker-free sequential turn signals. |
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 driver; 75 V max input; constant off-time control; no integrated FET. | Requires external high-side switch and gate driver; suited for higher-voltage LED strings (>42 V) or higher-power thermal partitioning. | Select when system needs >42 V input or discrete FET selection for thermal/power optimization. |
| TPS92692QPWPRQ1 | Two-channel, current-sense amplifier-based controller; supports analog/PWM dimming; no integrated FET; 65 V input. | Designed for multi-string configurations; requires external MOSFETs and current-sense amplifiers; offers channel-to-channel matching. | Select for dual independent LED strings or when tighter current matching (<1%) across channels is required. |
Compared with LM3409HV-Q1 and TPS92692QPWPRQ1, the TPS92515QDGQRQ1 provides lowest BOM count and smallest footprint for single-string 2 A automotive LED drivers, but lacks multi-string support or >42 V input capability - making it optimal for cost- and space-constrained DRL and AFS segment drivers.
Availability
TPS92515QDGQRQ1 is available at Aetrix Electronics and suitable for automotive lighting, industrial safety illumination, and high-reliability embedded LED systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle continuity.
Supply support for TPS92515QDGQRQ1 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 automotive ICs, with leadership in power management and LED driver innovation.
The TPS92515QDGQRQ1 belongs to TI's automotive-grade LED driver product line, designed specifically for AEC-Q100-compliant headlamp, DRL, and signaling applications demanding high reliability, wide input range, and integrated dimming control.
FAQ
What is the maximum average LED current supported by the TPS92515QDGQRQ1?
The TPS92515QDGQRQ1 supports up to 2 A average LED current under proper thermal management. This rating assumes adequate PCB copper area, thermal pad soldering to GND, and ambient temperature ≤125°C. At 150°C junction temperature, thermal shutdown activates at 175°C with 10°C hysteresis. The actual achievable current depends on VIN–VLED differential, switching frequency, and heatsinking - typical designs sustain 1.5–2 A continuously in automotive headlamp modules.
How does the TPS92515QDGQRQ1 implement shunt FET PWM dimming with linear response?
The TPS92515QDGQRQ1 maintains linear shunt FET dimming by dynamically switching the COFF pin voltage source between VOUT (during normal operation) and VCC (during shunt-on periods). When the output is shorted by the external shunt FET, VOUT collapses below the 1.00 V COFF threshold; the device then uses VCC to sustain a linear ramp on COFF, preserving constant inductor ripple amplitude and enabling true 10,000:1 dimming linearity without added ICs or complex timing circuits.
What is the purpose of the IADJ pin on the TPS92515QDGQRQ1, and how is it used?
The IADJ pin on the TPS92515QDGQRQ1 sets the peak current threshold for the internal comparator via a 10:1 resistive divider, enabling analog dimming over a 200:1 range. Applying a voltage from 0.1 V to 2.2 V adjusts the VCST threshold from ~211 mV to ~251 mV. For example, tying IADJ to VCC (5 V) yields ~240 mV threshold, while a 2.2 V reference gives ~220 mV - allowing precise current scaling without changing the sense resistor value.
Does the TPS92515QDGQRQ1 require external loop compensation components?
No, the TPS92515QDGQRQ1 does not require external loop compensation components. Its constant off-time (COT), peak-current control architecture provides inherent stability across input/output voltage variations and load steps. This eliminates the need for compensation networks, simplifies PCB layout, and ensures fast transient response - critical for automotive lighting where rapid brightness changes must occur without oscillation or overshoot.
What are the absolute maximum ratings for VIN and SW pins on the TPS92515QDGQRQ1?
The absolute maximum rating for VIN and SW pins on the TPS92515QDGQRQ1 is 45.0 V (for TPS92515/TPS92515-Q1 variants). This limit applies across the full operating temperature range and defines the stress boundary beyond which permanent damage may occur. Operation above 42 V nominal input is not recommended; the device enters undervoltage lockout below 5.15 V VIN, and thermal shutdown activates at 175°C junction temperature to protect against overloads.
TPS92515QDGQRQ1 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
TPS92515QDGQRQ1 FAQ
1.How can I place an order for TPS92515QDGQRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92515QDGQRQ1 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 TPS92515QDGQRQ1 reliable?
The price and inventory of TPS92515QDGQRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92515QDGQRQ1 is usually 5 days.
3.What payment methods are accepted for TPS92515QDGQRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92515QDGQRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92515QDGQRQ1?
TPS92515QDGQRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92515QDGQRQ1 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 TPS92515QDGQRQ1?
For technical support, including TPS92515QDGQRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92515QDGQRQ1 requirements.
6.How does Aetrix verify that TPS92515QDGQRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92515QDGQRQ1 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 TPS92515QDGQRQ1 meets industry standards.
7.What is the process for return or replacement of TPS92515QDGQRQ1?
All TPS92515QDGQRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92515QDGQRQ1, 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 TPS92515QDGQRQ1 part is unused and in its original packaging.
Return procedure for TPS92515QDGQRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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