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Texas Instruments TPS92682QRHBRQ1
- Part No.:
- TPS92682QRHBRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS92682QRHBRQ1.pdf
- Description:
- IC LED DRIVER CTRLR PWM 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
TPS92682QRHBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual-channel peak-current-mode controller for automotive LED lighting, supporting both constant-voltage (CV) and constant-current (CC) operation with ±4% LED current accuracy over –40°C to 150°C, 4.5 V to 65 V input range, and up to 1-MHz programmable switching frequency.
For engineers reviewing the TPS92682QRHBRQ1 datasheet, TPS92682QRHBRQ1 pinout, TPS92682QRHBRQ1 application, or TPS92682QRHBRQ1 equivalent, key selection considerations include SPI-programmable CV/CC mode configuration, dual-channel independent dimming (analog + 10-bit PWM), wettable-flank VQFN-32 packaging, and comprehensive fault protection including cycle-by-cycle current limit and open-drain per-channel fault flags.
Technical Context
The TPS92682QRHBRQ1 implements fixed-frequency peak-current-mode (PCM) control per channel, enabling fast transient response in boost, buck-boost, SEPIC, and boost-to-battery topologies. Each channel features independent analog-dimming via 8-bit DAC (28:1 range) and SPI-configurable 10-bit PWM dimming (over 1000:1 range).
Its SPI interface supports full register-level control of spread spectrum, soft-start timing, output voltage/current setpoints, fault timers, phase configuration (single/dual), and limp-home (LH) mode activation. The device integrates two rail-to-rail low-offset current sense amplifiers (±4% accuracy), dual gate drivers (GATE1/GATE2), and dual P-channel FET drivers (PDRV1/PDRV2) for external series switch control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports cold-crank (4.5 V) and load-dump conditions in automotive 12 V/24 V systems. |
| LED Current Accuracy | ±4% over –40°C to 150°C junction - enables stable illumination without thermal recalibration in headlamp modules. |
| Switching Frequency | Programmable 100 kHz to 1 MHz via RT resistor - allows EMI optimization and inductor size reduction. |
| Dimming Range | Analog: 28:1; PWM: >1000:1 - meets stringent automotive dynamic contrast requirements for adaptive driving beams. |
| Fault Protection | Cycle-by-cycle current limit, OVP/UVP, ILED overcurrent, thermal warning - ensures robust operation in safety-critical forward lighting. |
| Package | VQFN-32 (5.0 mm × 5.0 mm) with wettable flanks - supports automated optical inspection (AOI) and high-reliability solder joint formation. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C ambient) - certified for under-hood and exterior lighting applications. |
Pinout & Package
VQFN-32 (RHB) package with 5.0 mm × 5.0 mm body and exposed thermal pad. Wettable flank leads enable reliable solder-joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input | Accepts 4.5–65 V supply; powers internal LDOs and gate drivers - connects directly to battery or DC-DC pre-regulator. |
| GATE1 / GATE2 | N-channel FET gate driver outputs | Drive external high-side N-FETs in boost/buck-boost topologies; 500 mA peak sink/source capability. |
| PDRV1 / PDRV2 | P-channel series FET gate drivers | Control external P-FETs for PWM dimming; support >1000:1 dimming ratio with integrated level shift. |
| ISP1/ISN1, ISP2/ISN2 | High-side current sense inputs | Enable accurate LED current sensing across wide common-mode range (0–60 V); rail-to-rail input capability. |
| FB1/OV1 / FB2/OV2 | Output voltage feedback / overvoltage sense | Set CV output voltage or OVP threshold via resistor divider; SPI-programmable 8-bit DAC adjusts threshold in 2.5% steps. |
| FLT1 / FLT2/SYNC | Per-channel fault flag / SYNC input | Open-drain outputs indicate channel faults; FLT2 pin configurable as SYNC input for multi-device clock synchronization. |
| SCK / MOSI / MISO / SSN | SPI interface signals | Full-duplex SPI (up to 10 MHz) for real-time register access, diagnostics, and configuration updates during operation. |
| LH | Limp-home mode enable | Digital input that activates fail-safe operating mode with preconfigured SPI registers - critical for ASIL-B/C system compliance. |
Key Features
| Feature | Design Value |
|---|---|
| SPI-programmable CV/CC mode | Each channel independently configured for constant-voltage (e.g., boost regulator) or constant-current (e.g., LED string driver) operation via register write. |
| Dual 10-bit PWM dimming counters | Independent programmable frequency and duty cycle per channel - eliminates need for external PWM generators in adaptive lighting systems. |
| Wettable flank VQFN-32 | Enables AOI-compatible solder joint inspection - reduces field failure risk in high-volume automotive manufacturing. |
| Limp-home (LH) mode | Hardware-activated fail-safe state using dedicated SPI register set - supports functional safety requirements per ISO 26262 ASIL B/C. |
| Spread-spectrum modulation | SPI-enabled EMI reduction by modulating switching frequency - simplifies compliance with CISPR 25 Class 5 radiated emissions limits. |
Applications
| Automotive Forward Lighting | Emergency Vehicle Lighting |
|---|---|
|
Use Scenario: High-beam adaptive driving beam (ADB) modules requiring precise dual-channel current control and rapid dimming. IC Role / Device Role / Timing Role: Dual-channel CC controller regulating two independent LED strings; provides synchronized or staggered PWM dimming with <100 ns inter-channel timing skew. Use Value: ±4% current accuracy ensures consistent lumen output across temperature; 1000:1 PWM range enables pixel-level beam shaping without visible flicker. |
Use Scenario: Flashing red/blue warning lights on police, fire, and ambulance vehicles with high reliability and thermal resilience. IC Role / Device Role / Timing Role: Dual-channel CV controller powering parallel LED arrays in boost topology; LH mode maintains partial illumination during fault conditions. Use Value: 65 V input rating withstands 24 V system load-dump transients; AEC-Q100 Grade 1 qualification ensures operation at 125°C ambient. |
| Commercial Vehicle Headlamps | Off-Road & Agricultural Lighting |
|
Use Scenario: Heavy-duty truck headlamps exposed to extreme vibration, dust, and wide temperature swings. IC Role / Device Role / Timing Role: Dual-channel CC controller with external P-FET dimming for high-power LED strings; uses CSP/CSN inputs for high-side sensing in grounded-cathode configurations. Use Value: Wettable flank VQFN-32 improves solder joint reliability under mechanical stress; –40°C to 150°C junction range covers under-hood thermal extremes. |
Use Scenario: LED work lights on tractors and construction equipment requiring robustness against voltage spikes and ESD. IC Role / Device Role / Timing Role: Dual-channel CV controller in SEPIC topology for stable output across 9–32 V battery input range; integrated OVP/UVP protects against alternator surges. Use Value: ±2000 V HBM ESD rating per AEC-Q100-002; programmable fault timers prevent nuisance shutdowns during transient overloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92682QPWPRQ1 | HTSSOP-32 package (11.0 mm × 6.1 mm); higher RθJB (9.7°C/W vs 11.7°C/W); no wettable flanks | Better suited for space-constrained PCB layouts where thermal pad accessibility is limited; less compatible with AOI | Select when board-level reflow constraints favor HTSSOP or when legacy layout reuse is required |
| LM3492-Q1 | Single-channel, non-SPI, fixed-frequency current-mode controller; no analog/PWM dimming; no limp-home mode | Lower-cost solution for basic constant-current LED drivers without diagnostics or functional safety support | Choose only for non-safety-critical, single-string applications where SPI configurability and dual-channel operation are unnecessary |
Compared with TPS92682QPWPRQ1, the TPS92682QRHBRQ1 offers superior manufacturability via wettable flanks and tighter thermal resistance (RθJB = 11.7°C/W), while LM3492-Q1 lacks SPI, dual-channel capability, and functional safety features - making it unsuitable for ADB or ASIL-compliant designs.
Availability
TPS92682QRHBRQ1 is available at Aetrix Electronics and suitable for automotive forward lighting, emergency vehicle lighting, and commercial vehicle headlamp designs requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for TPS92682QRHBRQ1 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 high-reliability solutions for safety-critical systems.
The TPS92682-Q1 product line targets ASIL-B/C compliant automotive exterior lighting, integrating functional safety features, SPI configurability, and thermal resilience to replace discrete controller + MCU combinations in headlamp ECUs.
FAQ
What is the maximum switching frequency supported by the TPS92682QRHBRQ1?
The TPS92682QRHBRQ1 supports a programmable switching frequency up to 1 MHz, set via an external RT resistor. At RT = 20 kΩ, typical fSW reaches 1 MHz; at RT = 50 kΩ, it operates at ~400 kHz. Frequency synchronization via the FLT2/SYNC pin allows multi-device phase alignment - essential for reducing input ripple in dual-channel systems.
Does the TPS92682QRHBRQ1 support both constant-current and constant-voltage modes simultaneously?
Yes, the TPS92682QRHBRQ1 supports independent mode selection per channel: Channel 1 can operate in constant-current (CC) mode for LED string regulation while Channel 2 runs in constant-voltage (CV) mode for auxiliary power rail generation. Mode configuration is performed via SPI register CHxMODE (bits [1:0]), enabling mixed-topology designs like boost + buck-boost in a single IC.
How does the limp-home (LH) mode function in the TPS92682QRHBRQ1?
When the LH pin is pulled high, the TPS92682QRHBRQ1 enters limp-home mode and loads a dedicated set of SPI-programmed registers - including reduced current limits, fixed dimming levels, and simplified fault responses. This hardware-activated fail-safe state maintains partial functionality during system faults, supporting ISO 26262 ASIL B/C requirements without software intervention.
What is the purpose of the PDRV1 and PDRV2 pins on the TPS92682QRHBRQ1?
The PDRV1 and PDRV2 pins on the TPS92682QRHBRQ1 drive external P-channel MOSFETs placed in series with LED strings to enable high-ratio PWM dimming (>1000:1). These outputs integrate level-shifting circuitry to handle high-side gate drive relative to CSP voltage, eliminating external level-shifters and reducing bill-of-materials cost in automotive lighting modules.
Can the TPS92682QRHBRQ1 be used in SEPIC topology?
Yes, the TPS92682QRHBRQ1 supports SEPIC topology in constant-current mode. Its dual-channel peak-current-mode architecture, high-side current sense inputs (ISP/ISN), and flexible gate drive outputs allow implementation of isolated or non-isolated SEPIC converters - ideal for 12 V/24 V automotive systems requiring wide input range and stable LED current despite battery voltage fluctuations.
TPS92682QRHBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 6.5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- 8.8V
- Current - Output / Channel:
- -
- Frequency:
- 100kHz ~ 700kHz
- Dimming:
- Analog, PWM, SPI
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-VQFN (5x5)
TPS92682QRHBRQ1 FAQ
1.How can I place an order for TPS92682QRHBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92682QRHBRQ1 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 TPS92682QRHBRQ1 reliable?
The price and inventory of TPS92682QRHBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92682QRHBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS92682QRHBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92682QRHBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92682QRHBRQ1?
TPS92682QRHBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92682QRHBRQ1 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 TPS92682QRHBRQ1?
For technical support, including TPS92682QRHBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92682QRHBRQ1 requirements.
6.How does Aetrix verify that TPS92682QRHBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92682QRHBRQ1 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 TPS92682QRHBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS92682QRHBRQ1?
All TPS92682QRHBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92682QRHBRQ1, 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 TPS92682QRHBRQ1 part is unused and in its original packaging.
Return procedure for TPS92682QRHBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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