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Texas Instruments TPS92682QRHMRQ1
- Part No.:
- TPS92682QRHMRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS92682QRHMRQ1.pdf
- Description:
- IC LED DRIVER CTRLR PWM 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,898
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Product details
Overview
TPS92682QRHMRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual-channel peak-current-mode LED controller supporting both constant-voltage (CV) and constant-current (CC) operation, with ±4% LED current accuracy across –40°C to 150°C junction temperature, 4.5 V to 65 V input range, and SPI-programmable 1-MHz switching frequency - deployed in automotive forward lighting systems requiring functional safety compliance.
For engineers reviewing the TPS92682QRHMRQ1 datasheet, TPS92682QRHMRQ1 pinout, TPS92682QRHMRQ1 application, or TPS92682QRHMRQ1 equivalent, key selection considerations include dual-channel independent CV/CC mode configuration, rail-to-rail high-side current sense amplifier performance, SPI-controlled spread spectrum and soft-start timing, and P-channel series FET PWM dimming support with >1000:1 dimming range.
Technical Context
The TPS92682QRHMRQ1 implements fixed-frequency peak-current-mode control per channel, enabling boost, buck-boost, SEPIC, or boost-to-battery topologies. Each channel supports independent configuration via SPI registers for CV (voltage regulation via external resistor divider + 8-bit DAC) or CC (LED current regulation via programmable 8-bit IADJ DAC + 10-bit PWM counter) operation.
Functional safety capability is embedded through cycle-by-cycle current limit, output overvoltage/undervoltage protection, ILED overcurrent detection, thermal warning, and open-drain per-channel fault flags. The LH (limp home) pin enables fail-operational mode using a separate SPI register set.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports wide automotive battery crank (4.5 V) and load-dump conditions without external pre-regulation. |
| LED Current Accuracy | ±4% over –40°C to 150°C - ensures stable luminance in under-hood headlamp modules without recalibration. |
| Switching Frequency | Programmable up to 1 MHz - enables compact magnetics and EMI optimization via spread-spectrum modulation. |
| PWM Dimming Range | >1000:1 - achieved via external P-channel FET gate drive (PDRV1/PDRV2) and internal 10-bit PWM counter. |
| Analog Dimming Range | >28:1 - enabled by SPI-programmable 8-bit IADJ DAC controlling current sense reference voltage. |
| Fault Protection | Cycle-by-cycle current limit, OVP/UVP, thermal warning, open-drain FLT1/FLT2 - provides autonomous channel-level fault isolation. |
| Package | VQFN-32 (5.0 mm × 5.0 mm, wettable flank) - supports automated optical inspection (AOI) and high thermal reliability in automotive PCBs. |
Pinout & Package
VQFN-32 package with exposed thermal pad (RHB/RHM suffix); 5.0 mm × 5.0 mm body size; wettable flank for solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input supply | Accepts 4.5–65 V directly; powers internal 7.5-V VCC and 5-V VDD LDOs. |
| GATE1 / GATE2 | N-channel FET gate drivers | Drive external power switches in boost/buck-boost topologies; 500-mA peak sink/source. |
| ISP1/ISN1 / ISP2/ISN2 | High-side current sense inputs | Rail-to-rail, low-offset inputs for accurate switch current sensing in CC mode. |
| PDRV1 / PDRV2 | P-channel series FET drivers | Enable high-ratio PWM dimming (>1000:1) by driving external high-side P-FETs. |
| FB1/OV1 / FB2/OV2 | Output voltage feedback / OVP sense | Configurable as CV setpoint (resistor divider) or OVP threshold (SPI DAC-adjusted). |
| FLT1 / FLT2/SYNC | Per-channel fault flag / sync input | Open-drain outputs; FLT2 pin configurable as SYNC input for multi-device clock alignment. |
| SCK / MOSI / MISO / SSN | SPI interface signals | Full-duplex SPI (4-wire) for real-time register access, diagnostics, and configuration updates. |
| LH | Limp-home mode enable | Digital input that activates fail-operational register set for degraded-mode operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent CV/CC channel control | Each channel programmable via SPI for boost, buck-boost, or SEPIC topology - eliminates need for separate controllers in multi-string headlamps. |
| SPI-programmable spread spectrum | Reduces peak EMI amplitude by spreading switching frequency over 0.1–10 kHz range - meets CISPR 25 Class 5 without added shielding. |
| Integrated P-channel gate drivers (PDRV1/PDRV2) | Drives external high-side P-FETs for PWM dimming - avoids external level-shifters and enables >1000:1 dimming ratio with minimal BOM cost. |
| Low-offset rail-to-rail current sense amplifier | Supports accurate current sensing down to 10 mV differential - enables use of low-value, high-power sense resistors for thermal robustness. |
| AEC-Q100 Grade 1 qualification | Validated for operation from –40°C to +150°C junction temperature - certified for engine compartment placement in automotive forward lighting. |
Applications
| Automotive Forward Lighting | Emergency Vehicle Lighting |
|---|---|
|
Use Scenario: High-beam/low-beam LED modules in ADAS-integrated headlamps requiring dynamic beam shaping and fail-operational redundancy. IC Role / Device Role / Timing Role: Dual-channel CC controller regulating two independent LED strings; LH pin enables limp-home mode during partial failure. Use Value: ±4% current accuracy ensures consistent lumen output across temperature; SPI programmability allows OTA firmware updates for beam pattern calibration. |
Use Scenario: Flashing beacon arrays on fire trucks and ambulances requiring high-contrast, high-reliability illumination under vibration and thermal stress. IC Role / Device Role / Timing Role: Dual-channel CV controller powering parallel LED strings in boost configuration; FLT1/FLT2 provide per-string fault reporting to vehicle CAN bus. Use Value: 65-V input tolerance withstands 24-V system load dumps; wettable flank VQFN ensures solder joint reliability in high-vibration environments. |
| Commercial Vehicle Lighting | Off-Road Equipment Lighting |
|
Use Scenario: Daytime running lights (DRL) and turn signal modules in heavy-duty trucks with wide input voltage variation (12–32 V nominal). IC Role / Device Role / Timing Role: Dual-channel CV/CC hybrid controller - one channel in CV for DRL string, second in CC for turn signal PWM modulation. Use Value: Independent channel configuration reduces component count; programmable soft-start prevents inrush current during cold cranking. |
Use Scenario: Work lamp systems on construction and agricultural machinery operating in extreme ambient temperatures (–40°C to +85°C ambient). IC Role / Device Role / Timing Role: Dual-channel CC controller with thermal warning and overtemperature shutdown - protects LEDs during prolonged high-power operation. Use Value: Junction temperature monitoring up to 150°C enables safe derating logic; RT pin allows precise switching frequency tuning for optimal efficiency at varying loads. |
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 |
|---|---|---|---|
| TPS92681QRHMRQ1 | Single-channel version; identical pinout and register map but only one functional channel. | Used where space or cost constraints eliminate need for dual-channel control; requires two units for dual-string designs. | Select when only one LED string is needed or when channel redundancy is not required. |
| LM3492-Q1 | Single-channel, non-SPI, analog-controlled buck-boost LED driver; no CV mode, no PDRV outputs, no limp-home feature. | Targeted at simpler, lower-cost lighting modules without diagnostics or advanced dimming requirements. | Select for cost-sensitive, non-safety-critical applications where SPI configurability and dual-channel operation are unnecessary. |
Compared with TPS92682QRHMRQ1, the TPS92681QRHMRQ1 offers identical functionality per channel but lacks dual-channel integration, increasing board area and BOM count; the LM3492-Q1 omits SPI, CV mode, and functional safety features, limiting its use to basic constant-current applications without diagnostics or reconfiguration capability.
Availability
TPS92682QRHMRQ1 is available at Aetrix Electronics and suitable for automotive forward lighting, emergency vehicle beacons, commercial vehicle DRL systems, off-road equipment work lamps, and functional safety–compliant LED driver designs requiring stable component supply across extended temperature and voltage ranges.
Supply support for TPS92682QRHMRQ1 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 and embedded processing technologies, with leadership in automotive-grade power management and LED driver ICs.
The TPS92682-Q1 belongs to TI's automotive LED controller product line, designed specifically for AEC-Q100 Grade 1 exterior lighting applications requiring functional safety support, high-accuracy current regulation, and flexible topology implementation.
FAQ
What is the maximum switching frequency supported by the TPS92682QRHMRQ1?
The TPS92682QRHMRQ1 supports a programmable switching frequency up to 1 MHz, set via the RT pin resistor value and SPI-configurable DIV bits. At RT = 50 kΩ and DIV = 4, typical frequency is 400 kHz; higher frequencies reduce magnetic component size but require careful layout to manage EMI and gate drive losses. The TPS92682QRHMRQ1 also supports external clock synchronization via the FLT2/SYNC pin for multi-device timing alignment.
How does the TPS92682QRHMRQ1 achieve >1000:1 PWM dimming?
The TPS92682QRHMRQ1 achieves >1000:1 PWM dimming through two complementary methods: (1) direct external PWM signal application to PWM1/PWM2 pins, and (2) internal 10-bit programmable PWM counter controlled via SPI. Additionally, integrated PDRV1 and PDRV2 outputs drive external P-channel series FETs, enabling high-side switching with minimal dead-time distortion - critical for maintaining dimming linearity at ultra-low duty cycles. This architecture is implemented in the TPS92682QRHMRQ1 to meet stringent automotive lighting requirements.
What is the role of the LH (Limp Home) pin on the TPS92682QRHMRQ1?
The LH pin on the TPS92682QRHMRQ1 is a digital input that, when pulled high, activates limp-home mode - a fail-operational state where the device uses a separate set of SPI-programmed registers to maintain reduced but safe illumination output during partial system faults. This feature is integral to ASIL-B/C-compliant lighting systems and is validated under AEC-Q100 Grade 1 conditions. The LH function is fully implemented in the TPS92682QRHMRQ1 silicon and documented in its register map.
Does the TPS92682QRHMRQ1 support both constant-voltage and constant-current modes on the same channel?
No - each channel of the TPS92682QRHMRQ1 operates exclusively in either constant-voltage (CV) or constant-current (CC) mode, selected via SPI configuration. In CV mode, the channel regulates output voltage using FBx/OVx feedback and an 8-bit DAC; in CC mode, it regulates LED current using the current sense amplifier (ISPx/ISNx) and IADJ DAC. The TPS92682QRHMRQ1 does not support simultaneous CV+CC operation per channel, but allows independent mode selection per channel for mixed-string applications.
What package options are available for the TPS92682QRHMRQ1?
TPS92682QRHMRQ1 is offered in two automotive-qualified packages: VQFN-32 (RHB/RHM suffix, 5.0 mm × 5.0 mm, wettable flank) and HTSSOP-32 (DAP suffix, 11.0 mm × 6.1 mm). The RHB variant is the standard offering referenced in the datasheet revision history and thermal tables; both packages share identical pinout and electrical specifications. The wettable flank feature on the VQFN package enables automated optical inspection of solder joints - a key requirement for automotive PCB assembly traceability. The TPS92682QRHMRQ1 orderable part number corresponds specifically to the VQFN-32 (RHB) variant.
TPS92682QRHMRQ1 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):
- 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, Wettable Flank
- Supplier Device Package:
- 32-VQFN (5x5)
TPS92682QRHMRQ1 FAQ
1.How can I place an order for TPS92682QRHMRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92682QRHMRQ1 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 TPS92682QRHMRQ1 reliable?
The price and inventory of TPS92682QRHMRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92682QRHMRQ1 is usually 5 days.
3.What payment methods are accepted for TPS92682QRHMRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92682QRHMRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92682QRHMRQ1?
TPS92682QRHMRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92682QRHMRQ1 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 TPS92682QRHMRQ1?
For technical support, including TPS92682QRHMRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92682QRHMRQ1 requirements.
6.How does Aetrix verify that TPS92682QRHMRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92682QRHMRQ1 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 TPS92682QRHMRQ1 meets industry standards.
7.What is the process for return or replacement of TPS92682QRHMRQ1?
All TPS92682QRHMRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92682QRHMRQ1, 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 TPS92682QRHMRQ1 part is unused and in its original packaging.
Return procedure for TPS92682QRHMRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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