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Texas Instruments TPS92682QDAPRQ1
- Part No.:
- TPS92682QDAPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Datasheet:
-
TPS92682QDAPRQ1.pdf
- Description:
- IC LED DRIVER CTRLR PWM 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,825
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Product details
Overview
TPS92682QDAPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual-channel peak-current-mode controller for automotive LED lighting, supporting independent constant-voltage (CV) or constant-current (CC) operation per channel, ±4% LED current accuracy over –40°C to 150°C, up to 1-MHz programmable switching frequency, and SPI interface with spread-spectrum EMI reduction - deployed in forward lighting systems requiring functional safety compliance.
For engineers reviewing the TPS92682QDAPRQ1 datasheet, TPS92682QDAPRQ1 pinout, TPS92682QDAPRQ1 application, or TPS92682QDAPRQ1 equivalent, key selection considerations include dual-channel CV/CC mode configurability, rail-to-rail high-side current sense amplifier performance, P-channel series FET PWM dimming support (>1000:1 range), fault-flag per channel, and wettable-flank VQFN-32 packaging for automated optical inspection.
Technical Context
The TPS92682QDAPRQ1 implements fixed-frequency peak-current-mode (PCM) control with independent channel configuration for boost, buck-boost, SEPIC, or boost-to-battery topologies. Each channel features a low-input-offset rail-to-rail current sense amplifier (±4% ILED accuracy across –40°C to 150°C) and programmable cycle-by-cycle current limit, overvoltage, undervoltage, and thermal warning protection.
SPI programmability enables real-time configuration of soft-start timing, ILED/output voltage settings, current limit thresholds, single/dual-phase operation, and CV/CC mode selection. The device supports external clock synchronization, analog dimming (28:1 range via 8-bit DAC), and two PWM dimming methods: direct external PWM input or SPI-programmable 10-bit counter (up to 1-MHz).
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 12 V/24 V automotive systems. |
| LED Current Accuracy | ±4% over –40°C to 150°C junction temperature - ensures stable luminance in under-hood and headlamp environments. |
| Switching Frequency | Programmable 100 kHz to 1 MHz via RT resistor - enables EMI optimization and compact magnetics design. |
| PWM Dimming Range | >1000:1 - achieved via external P-channel FET driver (PDRV1/PDRV2) with integrated gate interface. |
| Current Sense Architecture | High-side rail-to-rail amplifier with ±0.3 V CSP–CSN common-mode range - supports accurate sensing in high-side switch configurations. |
| Fault Protection | Cycle-by-cycle current limit, output overvoltage/undervoltage, ILED overcurrent, thermal warning - each with dedicated open-drain FLT1/FLT2 outputs. |
| SPI Interface | Full-duplex, 4-wire (SCK/MOSI/MISO/SSN), 100 ns timing margins - enables real-time diagnostics and reconfiguration without interrupting operation. |
Pinout & Package
TPS92682QDAPRQ1 is packaged in a wettable-flank VQFN-32 (RHB) package measuring 5.0 mm × 5.0 mm with exposed thermal pad. This RoHS-compliant, AEC-Q100 qualified package supports automated optical inspection (AOI) and enhanced thermal dissipation (RθJA = 31.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input supply | Accepts 4.5–65 V battery input; powers internal LDOs and gate drivers. |
| GATE1 / GATE2 | N-channel FET gate drive outputs | Drive external high-side N-FETs in boost/buck-boost topologies; 500 mA sink/source capability. |
| PDRV1 / PDRV2 | P-channel series FET gate drivers | Directly drive external P-FETs for high-ratio PWM dimming; 29 mA sink, 83.5 Ω pull-up resistance. |
| ISP1/ISN1 / ISP2/ISN2 | High-side current sense inputs | Differential inputs for switch current sensing; rail-to-rail common-mode range (0–60 V). |
| CSP1/CSN1 / CSP2/CSN2 | LED current sense amplifier inputs | High-precision differential inputs for LED string current measurement; ±4% accuracy maintained across temp. |
| FB1/OV1 / FB2/OV2 | Output voltage feedback / OVP threshold | Configurable via resistor divider; sets both regulated output voltage (CV mode) and overvoltage protection threshold. |
| FLT1 / FLT2/SYNC | Fault flag outputs (open-drain) | Per-channel fault indication; FLT2 pin configurable as SYNC input for multi-device clock alignment. |
| LH | Limp-home mode enable | Hardware-initiated fail-safe mode using separate SPI register set for degraded operation. |
| SCK / MOSI / MISO / SSN | SPI interface signals | Full-duplex serial communication; supports diagnostics, register read/write, and real-time parameter updates. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent CV/CC channel control | Each channel configurable as constant-voltage regulator (e.g., boost for auxiliary supplies) or constant-current source (e.g., LED string driver), enabling mixed-load power management in single-package solutions. |
| SPI-programmable spread spectrum | Reduces peak EMI by modulating switching frequency (0.1–10 kHz modulation), easing compliance with CISPR 25 Class 5 requirements in automotive lighting modules. |
| Wettable-flank VQFN-32 package | Enables reliable AOI solder-joint inspection on production lines - critical for zero-defect manufacturing in safety-critical automotive applications. |
| Functional safety documentation support | Includes FIT rate data, failure mode analysis, and diagnostic coverage metrics aligned with ISO 26262 ASIL-B system-level development. |
| 1000:1 PWM dimming via PDRV | Integrated P-channel gate drivers eliminate need for external level-shifters or discrete drivers, reducing BOM count and PCB area in high-dynamic-range headlamp designs. |
Applications
| Automotive Forward Lighting | Emergency Vehicle Warning Lights |
|---|---|
|
Use Scenario: Adaptive driving beam (ADB) and matrix LED headlamps requiring independent per-segment current regulation and fast PWM dimming. IC Role / Device Role / Timing Role: Dual-channel CC controller managing two LED strings with synchronized or independent dimming; SPI enables real-time beam pattern updates. Use Value: ±4% current accuracy ensures consistent lumen output across temperature; >1000:1 PWM range enables precise glare-free pixel control. |
Use Scenario: High-intensity rotating/strobing warning lights on police, fire, and ambulance vehicles operating across wide ambient temperatures. IC Role / Device Role / Timing Role: Dual-channel CV/CC controller powering red/blue LED arrays and auxiliary signage LEDs from 12 V/24 V vehicle bus. Use Value: 65 V input rating withstands load dump transients; limp-home (LH) mode maintains partial functionality during fault conditions. |
| Commercial Vehicle Daytime Running Lights (DRL) | Off-Road & Agricultural Equipment Lighting |
|
Use Scenario: Long-life, thermally robust DRL modules mounted on truck grilles and trailer assemblies subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: Dual-channel CV controller regulating boost converters for white LED strings; analog dimming adjusts brightness based on ambient light sensor input. Use Value: AEC-Q100 Grade 1 qualification (–40°C to 150°C) ensures reliability in under-hood mounting; wettable flank package supports IPC-A-610 Class 3 inspection. |
Use Scenario: Sealed LED work lights and beacon systems on tractors, harvesters, and construction equipment exposed to dust, moisture, and wide voltage swings. IC Role / Device Role / Timing Role: Dual-channel CC controller driving multiple LED strings in buck-boost topology; fault flags trigger CAN bus alerts for predictive maintenance. Use Value: Comprehensive fault protection (OVP/UVP/OTP) prevents field failures; HTSSOP-32 variant offers alternative layout flexibility for ruggedized PCBs. |
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 |
|---|---|---|---|
| TPS92682QRHBRQ1 | VQFN-32 (RHB) package with identical pinout and electrical specs; differs only in tape-and-reel packaging and reel size (3000 vs 2500 units). | No functional difference; used interchangeably in automated SMT lines where reel quantity aligns with production batch size. | Select when standard reel size (3000 pcs) matches pick-and-place feeder requirements and inventory planning cycles. |
| LM3492QMH/NOPB | Single-channel, non-SPI, analog-controlled buck-boost LED driver; no CV mode, no dual-channel sync, no limp-home feature. | Suitable only for cost-sensitive, lower-complexity lighting where independent channel control and diagnostics are not required. | Choose only for legacy designs lacking functional safety or multi-string coordination needs - not a drop-in replacement. |
Compared with TPS92682QDAPRQ1, the TPS92682QRHBRQ1 offers identical performance in a functionally equivalent package optimized for different logistics handling, while the LM3492QMH/NOPB lacks SPI programmability, dual-channel independence, and automotive safety features - limiting its use to simpler, non-safety-critical applications.
Availability
TPS92682QDAPRQ1 is available at Aetrix Electronics and suitable for automotive forward lighting, emergency vehicle warning systems, and commercial vehicle DRL applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for TPS92682QDAPRQ1 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 was designed specifically for AEC-Q100 Grade 1 automotive exterior lighting, integrating functional safety support, dual-channel flexibility, and robust thermal performance into a single wettable-flank package.
FAQ
What is the maximum switching frequency supported by the TPS92682QDAPRQ1?
The TPS92682QDAPRQ1 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 input (FLT2/SYNC pin) allows alignment with external clocks for noise reduction in multi-controller systems.
Does the TPS92682QDAPRQ1 support both constant-current and constant-voltage modes simultaneously?
Yes - the TPS92682QDAPRQ1 supports independent configuration per channel: one channel can operate in constant-current (CC) mode for LED string regulation while the other runs in constant-voltage (CV) mode for auxiliary supply generation. Mode selection is SPI-programmable and does not require hardware changes.
What is the purpose of the LH (Limp-Home) pin on the TPS92682QDAPRQ1?
The LH pin on the TPS92682QDAPRQ1 initiates a fail-safe operational mode when pulled high. In LH mode, the device loads a separate set of SPI-programmed registers - enabling reduced functionality (e.g., fixed dimming, limited current) to maintain basic lighting output during fault conditions, supporting ASIL-B system-level safety goals.
Can the TPS92682QDAPRQ1 drive external P-channel MOSFETs for PWM dimming?
Yes - the TPS92682QDAPRQ1 integrates dedicated P-channel gate drivers (PDRV1 and PDRV2) capable of sinking 29 mA with 83.5 Ω pull-up resistance. These outputs directly drive external P-FETs in series with LED strings, enabling >1000:1 PWM dimming ratio without external level shifters or driver ICs.
Is the TPS92682QDAPRQ1 pin-compatible with other members of the TPS9268x-Q1 family?
Yes - the TPS92682QDAPRQ1 shares identical pinout and footprint with TPS92682QRHBRQ1 (same RHB VQFN-32 package) and TPS92682QPWPRQ1 (HTSSOP-32). Electrical behavior and register mapping are fully compatible; only package thermal metrics and reel packaging differ between variants.
TPS92682QDAPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 6.5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 100kHz ~ 700kHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HTSSOP
TPS92682QDAPRQ1 FAQ
1.How can I place an order for TPS92682QDAPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92682QDAPRQ1 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 TPS92682QDAPRQ1 reliable?
The price and inventory of TPS92682QDAPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92682QDAPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS92682QDAPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92682QDAPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92682QDAPRQ1?
TPS92682QDAPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92682QDAPRQ1 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 TPS92682QDAPRQ1?
For technical support, including TPS92682QDAPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92682QDAPRQ1 requirements.
6.How does Aetrix verify that TPS92682QDAPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92682QDAPRQ1 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 TPS92682QDAPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS92682QDAPRQ1?
All TPS92682QDAPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92682QDAPRQ1, 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 TPS92682QDAPRQ1 part is unused and in its original packaging.
Return procedure for TPS92682QDAPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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