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Texas Instruments TPS92518HVQPWPTQ1
- Part No.:
- TPS92518HVQPWPTQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92518HVQPWPTQ1.pdf
- Description:
- IC LED DRIVER CTRLR PWM 24HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:479
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Product details
Overview
TPS92518HVQPWPTQ1 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 matrix headlamps requiring high-precision current regulation and shunt FET dimming.
For engineers reviewing the TPS92518HVQPWPTQ1 datasheet, TPS92518HVQPWPTQ1 pinout, TPS92518HVQPWPTQ1 application, or TPS92518HVQPWPTQ1 equivalent, key selection criteria include its 65 V max VIN rating, 10,000:1 PWM dimming range, dual-channel independent off-time programming, thermal shutdown at 175°C, and HTSSOP-24 package with exposed thermal pad for automotive LED driver modules.
Technical Context
The TPS92518HVQPWPTQ1 implements a quasi-hysteretic, constant off-time (µs·V) control architecture where each channel's off-time scales inversely with VLEDx to maintain fixed peak-to-peak inductor ripple - enabling stable operation across wide output voltage ranges (1 V to 60 V) without loop compensation. It integrates dual high-side current sense comparators with programmable 10-bit peak threshold DACs (0–255 code), cycle-by-cycle current limiting, and leading-edge blanking (165–235 ns).
SPI interface provides full register access to configure peak current, off-time, maximum off-time, LED enable states, fault reporting (thermal, UVLO, overcurrent), and ADC readings for VLEDx and die temperature. The device supports both hardware PWM dimming (via dedicated PWM1/PWM2 pins) and high-frequency shunt FET dimming via software-controlled maximum off-time override.
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 in automotive lighting. |
| Peak Current Threshold | Programmable 0–255 DAC code; 10 mV to 265 mV differential sense - enables precise LED current setting from mA to >2 A with external Rsense. |
| PWM Dimming Range | 10,000:1 - allows ultra-low-brightness control down to 0.01% duty cycle without color shift in automotive DRL/position lamps. |
| Switching Frequency Range | 1 kHz to 2 MHz - dynamically adjusts with VLED and programmed off-time; supports EMI optimization and compact magnetics. |
| Thermal Shutdown | 175°C with 10°C hysteresis - protects against sustained overload in enclosed headlamp housings. |
| Operating Ambient Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and headlamp module placement. |
| VCC Regulator Output | 7.5 V ±0.75 V at ≤500 µA - powers gate drivers and external bias circuits; includes undervoltage lockout (5.9 V typical). |
Pinout & Package
TPS92518HVQPWPTQ1 is housed in a thermally enhanced 24-pin HTSSOP (PWP) package (7.7 mm × 4.4 mm, 0.65 mm pitch) with exposed thermal pad connected to GND for PCB-level heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power supply input | Accepts 6.5–65 V; powers internal regulators and gate drivers; must be decoupled near pin 1. |
| CSP1 / CSN1 CSP2 / CSN2 | Differential high-side current sense inputs | Monitor LED string current via external sense resistor; support 10 mV–265 mV programmable threshold with 0.4–1.5 µA bias. |
| GATE1 / GATE2 | High-side N-channel MOSFET gate drivers | Drive external high-side buck switches; 2.8 Ω low-side RDS(on), 7.3 Ω high-side RDS(on); require bootstrap circuitry (BOOTx/SWx). |
| BOOT1 / BOOT2 | Bootstrap capacitor supply | Provides floating gate drive voltage for high-side FETs; UVLO triggers at 4.4 V falling with 200 mV hysteresis. |
| VLED1 / VLED2 | LED string output voltage sense | Analog input scaling off-time and enabling VLED-compensated ripple control; supports 1–60 V range with 12-bit ADC readback. |
| PWM1 / PWM2 | Hardware PWM dimming inputs | Direct TTL-compatible dimming control; 68–105 ns propagation delay; no external components required. |
| EN/UV | Enable / UVLO override pin | Enables device when >1.24 V; bypasses SPI at >23.4 V to load default registers; provides hysteresis for stable startup. |
| SCK / MOSI / MISO / SSN | SPI serial interface | 4-wire full-duplex interface; 2 MHz max clock; supports configuration, calibration, fault reporting, and real-time ADC reads. |
| GND | System ground reference | Common return for power, analog, and digital sections; exposed thermal pad must be soldered to GND plane with ≥4 vias. |
Key Features
| Feature | Design Value |
|---|---|
| Quasi-hysteretic µs·V off-time control | Maintains constant peak-to-peak inductor ripple across varying VLED, eliminating need for external compensation and enabling CCM/DCM seamless transition. |
| Dual independent 10-bit DACs per channel | Allows separate programming of peak current threshold (LEDx_PKTH_DAC), off-time (LEDx_TOFF_DAC), and maximum off-time (LEDx_MAXOFF_DAC) for flexible multi-string tuning. |
| Integrated shunt FET dimming support | Configurable maximum off-time timer enables precise, high-frequency shunt switching without external timing components - critical for AFS pixel control. |
| Automotive-grade fault monitoring | Real-time detection and SPI-reporting of thermal shutdown, CSP/CSN UVLO, BOOT UVLO, EN/UV faults, and SPI communication errors. |
| On-chip temperature and VLED ADC | 12-bit die temperature sensor (–40°C to +150°C) and dual VLED monitors provide closed-loop thermal derating and output voltage validation. |
Applications
| Adaptive Front Lighting System (AFS) | Matrix LED Headlamp |
|---|---|
Use Scenario: Dynamic beam shaping using individually addressable LED segments to avoid glare while illuminating road signs, pedestrians, and curves. IC Role / Device Role / Timing Role: Dual-channel TPS92518HVQPWPTQ1 controls two independent LED strings with synchronized PWM dimming and shunt FET timing for pixel-level brightness modulation. Use Value: Enables <100 µs shunt FET response time and 10,000:1 dimming resolution - meeting UNECE R149 requirements for adaptive beam cutoff precision. | Use Scenario: High-resolution headlamp with 256+ individually controllable LEDs arranged in horizontal/vertical arrays for selective darkening and spotlighting. IC Role / Device Role / Timing Role: TPS92518HVQPWPTQ1 serves as primary current controller per sub-string; SPI configures per-pixel current and off-time to match optical intensity profiles. Use Value: Programmable µs·V off-time ensures consistent ripple across variable VLED (3–58 V) during dynamic beam steering - maintaining luminous uniformity without recalibration. |
| Daytime Running Light (DRL) | Automotive Position & Turn Signal |
Use Scenario: High-brightness, thermally stable DRL module operating continuously at ambient temperatures up to +125°C in sealed headlamp enclosures. IC Role / Device Role / Timing Role: TPS92518HVQPWPTQ1 regulates constant current to parallel LED strings while monitoring die temperature and adjusting output via SPI-based thermal foldback. Use Value: Integrated 175°C thermal shutdown with 10°C hysteresis prevents thermal runaway; HTSSOP-24 exposed pad sustains >2.5 W dissipation in constrained space. | Use Scenario: Combined position lamp and amber turn signal sharing same optical path, requiring rapid on/off transitions and color-consistent dimming. IC Role / Device Role / Timing Role: TPS92518HVQPWPTQ1 drives white position LEDs and amber turn LEDs on separate channels, with independent PWM dimming inputs for simultaneous fade and flash control. Use Value: Hardware PWM1/PWM2 pins deliver <100 ns edge alignment - ensuring zero phase skew between position and turn functions for regulatory compliance (SAE J583). |
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 |
|---|---|---|---|
| TPS92518QPWPTQ1 | Lower 42 V max VIN rating; identical pinout, SPI register map, and feature set. | Suitable only for 12 V/24 V systems without boost stage; not rated for 48 V battery architectures or boost-fed inputs. | Select when input voltage remains ≤42 V and cost sensitivity outweighs future 48 V platform readiness. |
| LM3492-Q1 | Single-channel synchronous buck controller; no SPI interface; analog-only dimming; no shunt FET support. | Lacks dual-channel independence, digital configurability, and high-resolution dimming - limited to basic constant-current LED drivers. | Choose only for cost-constrained single-string designs where programmability and AFS features are unnecessary. |
Compared with TPS92518QPWPTQ1, the TPS92518HVQPWPTQ1 adds 23 V headroom for 48 V battery compatibility and boost-fed topologies, while LM3492-Q1 sacrifices channel count, digital control, and dimming fidelity for BOM simplicity - making TPS92518HVQPWPTQ1 the sole option for scalable, SPI-configurable matrix headlamp platforms.
Availability
TPS92518HVQPWPTQ1 is available at Aetrix Electronics and suitable for automotive LED lighting, adaptive front lighting systems (AFS), and matrix headlamp modules requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TPS92518HVQPWPTQ1 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 delivering AEC-Q100-qualified power management solutions.
The TPS92518HVQPWPTQ1 belongs to TI's automotive LED driver portfolio, engineered specifically for adaptive and matrix headlamp systems requiring high-voltage operation, dual-channel independence, and SPI-based system-level integration.
FAQ
What is the maximum input voltage supported by the TPS92518HVQPWPTQ1?
The TPS92518HVQPWPTQ1 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 automotive 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 TPS92518HVQPWPTQ1 achieve constant LED current regulation without external compensation?
The TPS92518HVQPWPTQ1 uses quasi-hysteretic constant off-time (µs·V) control, where off-time scales inversely with VLED to maintain fixed peak-to-peak inductor ripple. This eliminates the need for external loop compensation components while providing inherent cycle-by-cycle current limiting and seamless CCM/DCM operation - confirmed in Section 8.3.1 of the SLUSCZ1 datasheet.
Can the TPS92518HVQPWPTQ1 drive shunt FETs for high-frequency dimming in matrix headlamps?
Yes - the TPS92518HVQPWPTQ1 includes a dedicated maximum off-time timer (LEDx_MAXOFF_DAC) that disables the main switch and enables external shunt FETs for precise, high-frequency dimming. This feature is explicitly documented in Section 8.3.1.3 and Figure 19 of the SLUSCZ1 datasheet, supporting AFS pixel-level control with sub-100 µs timing resolution.
What SPI interface capabilities does the TPS92518HVQPWPTQ1 provide for system integration?
The TPS92518HVQPWPTQ1 offers full-duplex 4-wire SPI (SCK/MOSI/MISO/SSN) supporting register read/write, real-time ADC reads (VLED, die temperature), fault status reporting (thermal, UVLO, SPI error), and digital calibration - all at up to 2 MHz clock rate. Timing parameters (tSS_SU, tSU, tH) are fully specified in Section 6.5 of SLUSCZ1.
Is the TPS92518HVQPWPTQ1 pin-compatible with other devices in the TPS92518-Q1 family?
Yes - the TPS92518HVQPWPTQ1 shares identical HTSSOP-24 (PWP) pinout, register map, and functional block diagram with TPS92518QPWPTQ1 and TPS92518HVPWPTQ1. Differences are limited to absolute maximum ratings (VIN, BOOTx) and internal trimming; no PCB layout changes are required when upgrading from the 42 V variant to the 65 V HV version.
TPS92518HVQPWPTQ1 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
TPS92518HVQPWPTQ1 FAQ
1.How can I place an order for TPS92518HVQPWPTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92518HVQPWPTQ1 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 TPS92518HVQPWPTQ1 reliable?
The price and inventory of TPS92518HVQPWPTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92518HVQPWPTQ1 is usually 5 days.
3.What payment methods are accepted for TPS92518HVQPWPTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92518HVQPWPTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92518HVQPWPTQ1?
TPS92518HVQPWPTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92518HVQPWPTQ1 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 TPS92518HVQPWPTQ1?
For technical support, including TPS92518HVQPWPTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92518HVQPWPTQ1 requirements.
6.How does Aetrix verify that TPS92518HVQPWPTQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92518HVQPWPTQ1 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 TPS92518HVQPWPTQ1 meets industry standards.
7.What is the process for return or replacement of TPS92518HVQPWPTQ1?
All TPS92518HVQPWPTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92518HVQPWPTQ1, 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 TPS92518HVQPWPTQ1 part is unused and in its original packaging.
Return procedure for TPS92518HVQPWPTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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