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Texas Instruments TPS92518HVQPWPRQ1
- Part No.:
- TPS92518HVQPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92518HVQPWPRQ1.pdf
- Description:
- IC LED DRIVER CTRLR PWM 24HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS92518HVQPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive dual-channel buck LED controller with SPI interface, supporting 6.5 V to 65 V input, quasi-hysteretic control, and independent PWM/analog dimming per channel - used in adaptive front lighting systems (AFS) and switched matrix headlamps.
For engineers reviewing the TPS92518HVQPWPRQ1 datasheet, TPS92518HVQPWPRQ1 pinout, TPS92518HVQPWPRQ1 application, or TPS92518HVQPWPRQ1 equivalent, key selection criteria include its 10,000:1 PWM dimming range, programmable peak current threshold (255-step DAC), controlled off-time architecture (µs·V scaling), and dual-channel thermal/fault reporting via SPI.
Technical Context
The TPS92518HVQPWPRQ1 implements a quasi-hysteretic, constant off-time (COT) control architecture where off-time scales linearly with VLEDx voltage (µs·V mode), enabling stable regulation across wide output voltage ranges (up to 60 V per channel) without external compensation. Each channel features independent 8-bit DAC-programmable peak current threshold (VCSTx), off-time (tOFF), and maximum off-time (tMAXOFF).
Its SPI interface supports full register access for real-time fault monitoring (thermal shutdown at 175°C, BOOT UVLO, CSP UVLO), digital calibration, and dynamic reconfiguration of dimming parameters - critical for platform-based lighting driver modules requiring software-defined LED current profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5 V to 65 V - supports direct battery connection (12 V/24 V/48 V systems) and boost-fed inputs without external pre-regulation. |
| Peak Current Threshold | 10 mV to 265 mV (DAC-controlled) - enables precise LED current setting from low-power indicators to high-brightness headlamp channels. |
| PWM Dimming Range | 10,000:1 - allows ultra-fine brightness control in safety-critical automotive lighting without visible flicker at low duty cycles. |
| Switching Frequency Range | 1 kHz to 2 MHz - selectable via tOFF DAC and VLEDx; higher frequencies reduce inductor size, lower frequencies improve efficiency at light loads. |
| Thermal Shutdown | 175°C with 10°C hysteresis - protects against sustained overtemperature in enclosed headlamp housings. |
| SPI Interface Speed | 2 MHz max clock (500 ns period) - enables fast configuration updates during runtime dimming transitions or fault recovery. |
| Ambient Operating Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and headlamp module placement. |
Pinout & Package
TPS92518HVQPWPRQ1 is housed in a thermally enhanced 24-pin HTSSOP (PWP) package (7.7 mm × 4.4 mm) with exposed thermal pad connected to GND for junction-to-board thermal resistance of 15.7°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power supply input | Accepts 6.5–65 V; powers internal LDOs and gate drivers; must be decoupled near pin. |
| CSP1 / CSN1 CSP2 / CSN2 | Differential high-side current sense inputs | Measure LED string current via external sense resistor; 10:1 internal divider enables low-loss sensing. |
| GATE1 / GATE2 | High-side N-channel MOSFET gate drivers | Drive external high-side buck switches; integrated PFET/NFET with RDS(on) = 7.3 Ω / 2.8 Ω. |
| SW1 / SW2 | Switch node connections | Connect to buck inductor and high-side FET source; require low-inductance layout for EMI control. |
| BOOT1 / BOOT2 | Bootstrap voltage inputs | Supply gate drive for high-side FETs; monitored for UVLO (4.4 V typical falling threshold). |
| VLED1 / VLED2 | LED string output voltage sense | Set off-time scaling factor (µs·V); also used for open-load detection and overvoltage protection. |
| PWM1 / PWM2 | Dedicated hardware PWM dimming inputs | Direct cycle-by-cycle control of LED current; 68–105 ns propagation delay ensures tight timing alignment. |
| EN/UV | Enable / UVLO override input | Two-mode operation: <1.3 V enables SPI-configured mode; >23.6 V bypasses SPI and loads default registers. |
| SCK / MOSI / MISO / SSN | SPI serial interface | Full-duplex 4-wire interface; supports daisy-chaining multiple controllers on shared bus. |
| VCC1 / VCC2 | Channel-specific LDO outputs | 7.5 V ±0.6 V, 500 µA max - powers external bias circuits or level-shifters; UVLO at 5.9 V. |
| GND | System ground reference | Common return for power, analog, and digital sections; exposed thermal pad must be soldered to GND plane. |
Key Features
| Feature | Design Value |
|---|---|
| Quasi-hysteretic COT control | Enables >1 MHz switching without loop compensation while maintaining cycle-by-cycle current limiting and fast transient response for matrix LED pixel control. |
| Software-programmable dimming | Independent 8-bit DACs per channel for peak current (255 steps), off-time (255 steps), and max off-time (255 steps) - eliminates hardware changes across LED load variants. |
| High-frequency shunt FET dimming | Configurable maximum off-time allows precise timing of external shunt FET activation - essential for flicker-free, high-contrast AFS beam shaping. |
| Dual-channel fault reporting | SPI-accessible registers report thermal warning, BOOT UVLO, CSP UVLO, and SPI communication errors - enables diagnostic logging and fail-safe system responses. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient, HBM ±2 kV, CDM ±750 V - meets automotive reliability requirements for front-end lighting modules. |
Applications
| Adaptive Front Lighting System (AFS) | Switched Matrix Headlamp |
|---|---|
Use Scenario: Dynamic beam steering and selective pixel blanking in response to vehicle speed, steering angle, and traffic conditions. IC Role / Device Role / Timing Role: Dual-channel buck controller synchronizing two independent LED strings with microsecond-level PWM timing alignment for seamless beam transitions. Use Value: Enables <100 µs inter-channel timing skew and 10,000:1 dimming resolution - critical for glare-free high-beam assist and cornering functions. | Use Scenario: Individual LED pixel control in high-resolution headlamp arrays using shunt FETs per segment. IC Role / Device Role / Timing Role: Generates precise off-time windows to trigger external shunt FETs, enabling per-pixel on/off control without affecting adjacent segments. Use Value: Achieves <5 µs shunt timing accuracy via programmable tMAXOFF - eliminates crosstalk and enables true black-level contrast in matrix beams. |
| Automotive DRL / Position Lamp | High/Low Beam Driver Module |
Use Scenario: Constant-current driving of white LED strings for daytime running lights with thermal derating and fault diagnostics. IC Role / Device Role / Timing Role: Primary current regulator with analog dimming (255:1 range) and SPI-monitored thermal feedback for closed-loop brightness stability. Use Value: Maintains ±3% LED current accuracy over temperature via DAC-calibrated VCSTx and integrated die temperature ADC. | Use Scenario: High-power buck conversion for main beam LEDs (≥1 A/channel) with overvoltage and open-load protection. IC Role / Device Role / Timing Role: Dual high-voltage buck controller managing up to 65 V input and 60 V LED string voltage per channel. Use Value: Supports direct 48 V battery input and handles 60 V VLED transients - reduces need for upstream DC/DC stages in next-gen EV architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel automotive LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92518QPWPRQ1 | Lower input voltage rating (6.5–42 V vs. 6.5–65 V); identical pinout, SPI register map, and feature set. | Suitable for 12 V/24 V systems only; not rated for 48 V battery architectures or boost-fed inputs above 42 V. | Select when system VIN never exceeds 42 V - offers same functionality at lower cost and smaller thermal footprint. |
| LM3492-Q1 | Single-channel, non-SPI synchronous buck controller; no programmable dimming, no fault reporting, no thermal ADC. | Requires external MCU for dimming control and diagnostics; limited to basic constant-current applications without adaptive features. | Choose only for cost-sensitive, single-string designs where software configurability and diagnostics are unnecessary. |
Compared with TPS92518QPWPRQ1, the TPS92518HVQPWPRQ1 adds 23 V headroom for 48 V EV platforms and boost-fed topologies, while LM3492-Q1 lacks SPI, dual-channel capability, and digital dimming - making it unsuitable for AFS or matrix headlamp use cases requiring coordinated multi-channel control.
Availability
TPS92518HVQPWPRQ1 is available at Aetrix Electronics and suitable for automotive LED headlamp modules, adaptive front lighting systems (AFS), and switched matrix headlamp designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for TPS92518HVQPWPRQ1 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 automotive ICs, with decades of experience in high-reliability power management solutions.
The TPS92518-Q1 product line delivers digitally configurable, AEC-Q100-qualified LED controllers for next-generation automotive lighting - designed specifically for adaptive, matrix, and safety-critical headlamp applications demanding precision dimming, robust diagnostics, and wide-input flexibility.
FAQ
What is the maximum input voltage supported by the TPS92518HVQPWPRQ1?
The TPS92518HVQPWPRQ1 supports a maximum input voltage of 65 V, verified per Absolute Maximum Ratings in the datasheet (SLUSCZ1, Section 6.1). This high-voltage capability enables direct connection to 48 V battery systems and boost-stage outputs, distinguishing it from the standard TPS92518-Q1 variant rated for 42 V. Operation above 65 V risks permanent damage.
How does the TPS92518HVQPWPRQ1 achieve 10,000:1 PWM dimming?
The TPS92518HVQPWPRQ1 achieves 10,000:1 PWM dimming through dedicated hardware PWM inputs (PWM1/PWM2) with sub-100 ns propagation delay and internal timing circuitry that maintains precise duty-cycle fidelity across frequency ranges up to 2 MHz. This is independent of SPI configuration and enables flicker-free dimming even at very low duty cycles required for automotive AFS beam shaping.
Can the TPS92518HVQPWPRQ1 operate without SPI configuration?
Yes - the TPS92518HVQPWPRQ1 can operate without SPI by applying >23.6 V to the EN/UV pin, which bypasses SPI initialization and loads factory-default register values. In this mode, peak current, off-time, and dimming settings are fixed; SPI remains disabled until EN/UV falls below 23.4 V and the device is power-cycled.
What thermal protection features does the TPS92518HVQPWPRQ1 include?
The TPS92518HVQPWPRQ1 includes junction thermal shutdown at 175°C (with 10°C hysteresis) and an integrated die temperature ADC accessible via SPI (VTHERM register). It also monitors BOOTx UVLO and CSPx UVLO - all reported in real time through SPI status registers - enabling layered thermal management in sealed headlamp enclosures.
Is the TPS92518HVQPWPRQ1 pin-compatible with other devices in the TPS92518-Q1 family?
Yes - the TPS92518HVQPWPRQ1 is pin-compatible with the TPS92518QPWPRQ1 and shares identical 24-pin HTSSOP (PWP) packaging, pinout, and register map. The only functional difference is the extended 65 V input rating; all SPI commands, fault reporting, and dimming controls operate identically across both variants.
TPS92518HVQPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- No
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 6.5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- 62V
- Current - Output / Channel:
- -
- Frequency:
- 2MHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-HTSSOP
TPS92518HVQPWPRQ1 FAQ
1.How can I place an order for TPS92518HVQPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92518HVQPWPRQ1 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 TPS92518HVQPWPRQ1 reliable?
The price and inventory of TPS92518HVQPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92518HVQPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS92518HVQPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92518HVQPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92518HVQPWPRQ1?
TPS92518HVQPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92518HVQPWPRQ1 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 TPS92518HVQPWPRQ1?
For technical support, including TPS92518HVQPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92518HVQPWPRQ1 requirements.
6.How does Aetrix verify that TPS92518HVQPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92518HVQPWPRQ1 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 TPS92518HVQPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS92518HVQPWPRQ1?
All TPS92518HVQPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92518HVQPWPRQ1, 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 TPS92518HVQPWPRQ1 part is unused and in its original packaging.
Return procedure for TPS92518HVQPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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