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Texas Instruments TLC69651QRTWRQ1
- Part No.:
- TLC69651QRTWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69651QRTWRQ1.pdf
- Description:
- AUTOMOTIVE LOCAL DIMMING MINI-LE
- Quantity:
- Payment:
- Shipping:
Inventory:1,028
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Product details
Overview
TLC69651QRTWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive 16-channel constant-current LED sink driver optimized for local dimming backlight systems, delivering 30mA per channel at up to 50V compliance voltage, ±2% channel-to-channel current matching, and 15-bit brightness resolution for high-contrast LCD displays in vehicle instrument clusters.
For engineers reviewing the TLC69651QRTWRQ1 datasheet, TLC69651QRTWRQ1 pinout, TLC69651QRTWRQ1 application, or TLC69651QRTWRQ1 equivalent, this page provides verified technical context, validated package mapping (WQFN-24), confirmed daisy-chain interface behavior, functional safety documentation support, and real-world diagnostic capabilities including per-zone LED open/short detection and thermal shutdown reporting via UART/INT or SOUT/CLK_O.
Technical Context
The TLC69651QRTWRQ1 implements adaptive headroom voltage control (AHVC) to dynamically regulate DC/DC feedback using only the FB pin of the last device in a daisy chain-enabling simplified layout across up to 1024 devices (16,000 zones). Its SRAM-based brightness storage supports black insertion and variable refresh rate (VRR) features to enhance display quality.
It integrates three dedicated diagnostics: LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD), with programmable readback through either UART + interrupt pin or two-wire CLK_O/SOUT outputs-both configurable via register settings without hardware reconfiguration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 independent constant-current sinks for precise local dimming zone control |
| Max Output Current / Voltage | 30mA per channel with 50V compliance voltage-supports high-Vf LED strings in automotive displays |
| Current Matching | ±2% (typ.) channel-to-channel error ensures uniform luminance across dimming zones |
| Brightness Resolution | Up to 15-bit PWM/hybrid dimming enables smooth grayscale transitions and reduced flicker |
| Daisy-Chain Speed | Up to 20MHz data transfer rate with 1.8V/3.3V I/O compatibility for scalable multi-device systems |
| Power Consumption | ≤200μA standby current and ≤3.5mA normal-mode ICC minimize system-level power overhead |
| Operating Temp Range | –40°C to +125°C ambient (Grade 1)-qualified per AEC-Q100 for under-hood and dashboard mounting |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm wettable flank, 0.5mm pitch, exposed thermal pad (Pin 25) requiring PCB solder connection for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | 3V–5.5V logic and internal regulator input; decoupling required near pin |
| GND | Ground reference | System ground return for analog/digital domains and thermal pad connection point |
| CLK_I | Serial clock input | Asynchronous master clock for daisy-chain data latching; accepts 1.8V/3.3V logic levels |
| SIN | Serial data input | CMOS-compatible input accepting 16-bit command/data frames for configuration and dimming |
| SOUT | Serial data output | Readback path for diagnostics (LOD/LSD/TSD) in two-wire mode; driven only when enabled |
| CLK_O | Serial clock output | Pass-through clock for cascading to next device; synchronized with SOUT timing |
| FB | DC/DC feedback input | Only used on final device in chain; connects to DC/DC converter feedback node for AHVC |
| OUT0–OUT15 | Constant-current outputs | 16 high-side referenced current sinks; each drives cathode of LED string to GND |
| INT | Interrupt output | Open-drain active-low signal asserting on LOD, LSD, or TSD event; requires pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces power loss by dynamically adjusting DC/DC output to match minimum required VLED + margin across all zones |
| Programmable EMI Reduction | Four integrated phase-shifting schemes and adjustable drive strength lower radiated emissions without external filters |
| Per-Zone Diagnostics | Detects open-circuit and short-circuit faults on each of 16 outputs independently-no external sensing components needed |
| Flexible Dimming Architecture | Global 8-bit max-current setting + per-channel 15-bit brightness control enables hybrid PWM/analog dimming for low-frequency flicker suppression |
| Functional Safety Support | Documentation package available for ISO 26262 ASIL-B system integration-including FIT rates, failure modes, and diagnostic coverage analysis |
Applications
| Automotive Instrument Cluster Display | Automotive Central Infotainment Display |
|---|---|
Use Scenario: High-brightness, high-contrast TFT-LCD backlighting in digital gauge clusters with dynamic content and night/day mode switching. IC Role / Device Role / Timing Role: 16-channel local dimming controller managing individual LED zones behind segmented LCD areas to enhance contrast ratio and reduce glare. Use Value: Enables >10,000:1 contrast in daylight while maintaining deep blacks at night-meeting OEM requirements for readability and driver focus. |
Use Scenario: Large-format center-stack display with HDR video playback and navigation overlays requiring precise luminance control across wide viewing angles. IC Role / Device Role / Timing Role: Constant-current sink driver coordinating with host MCU over daisy-chain interface to execute frame-synchronized dimming updates. Use Value: Supports black insertion and VRR features to eliminate motion blur and judder during fast UI transitions-critical for safety-critical infotainment response. |
| Automotive Heads-Up Display (HUD) | Automotive Rear Seat Entertainment (RSE) |
Use Scenario: Compact projection-based HUD requiring ultra-low latency brightness updates and minimal thermal footprint in confined dashboard space. IC Role / Device Role / Timing Role: Local dimming driver operating in low-power standby (≤200μA) between image frames, activated synchronously with DMD/LCoS controller timing. Use Value: Achieves <100μs brightness update latency and thermal shutdown protection-ensuring safe operation within sealed HUD enclosures. |
Use Scenario: Dual-screen RSE system with independent dimming zones for front/rear passengers and ambient light adaptation. IC Role / Device Role / Timing Role: Daisy-chained LED driver enabling coordinated zone control across multiple displays using single host interface. Use Value: Scales to 1024 devices (16,000 zones) with 20MHz daisy-chain throughput-supporting multi-display architectures without added routing complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69651QPWPRQ1 | Same electrical specs but HTSSOP-28 package (9.7mm × 4.4mm); higher MSL level (Level-3 vs Level-1); no wettable flanks | Better suited for manual inspection and rework; less compact than WQFN; requires larger PCB area and different thermal pad layout | Select when board assembly process favors leaded packages or thermal management relies on exposed leads rather than bottom thermal pad |
| TLC69611QRTWRQ1 | Same WQFN-24 package and pinout, but rated for 60mA/50V output-higher current capability with identical control interface and diagnostics | Applicable where higher LED string current is needed (e.g., brighter displays or longer strings), but requires verification of PCB trace current capacity and thermal design | Choose when upgrading luminance without changing layout-pin-compatible with TLC69651QRTWRQ1 but delivers double the per-channel current |
Compared with TLC69651QPWPRQ1, the TLC69651QRTWRQ1 offers superior thermal performance and space efficiency in automotive modules with tight form factors; versus TLC69611QRTWRQ1, it trades current headroom for tighter current regulation at 30mA-ideal for precision dimming where consistency outweighs peak output.
Availability
TLC69651QRTWRQ1 is available at Aetrix Electronics and suitable for automotive instrument cluster displays, central infotainment systems, and heads-up displays requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TLC69651QRTWRQ1 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-grade ICs, with decades of experience in high-reliability power management and display interface solutions.
The TLC696x1-Q1 product line was designed specifically for automotive LCD local dimming-integrating precision current control, daisy-chain scalability, functional safety support, and diagnostics into a single AEC-Q100 qualified package.
FAQ
What is the maximum LED string voltage supported by the TLC69651QRTWRQ1?
The TLC69651QRTWRQ1 supports up to 50V compliance voltage per output channel, enabling direct drive of multi-LED strings with high forward voltage drops-common in white LED arrays used in automotive displays. This rating is specified under continuous operation at TA = 125°C and applies to all 16 channels simultaneously when thermally managed per the WQFN-24 thermal pad guidelines.
Does the TLC69651QRTWRQ1 require external current-setting resistors?
No, the TLC69651QRTWRQ1 does not require external current-setting resistors. It uses internal precision current references and matched transistor arrays to deliver factory-trimmed 30mA per channel with ±2% channel-to-channel matching. The global 8-bit maximum current register allows software-adjustable scaling without hardware changes.
How does the daisy-chain interface handle error propagation across multiple TLC69651QRTWRQ1 devices?
The TLC69651QRTWRQ1 daisy-chain interface uses synchronous serial communication with built-in CRC checking per frame. If a device detects invalid data or timing violation, it holds SOUT in high-impedance state to prevent corruption downstream-allowing the host to isolate faulty units. No automatic retry or retransmission is implemented; error recovery is handled at the system firmware level.
Can the TLC69651QRTWRQ1 operate without connecting the FB pin?
Yes-the FB pin is only required on the final device in a daisy chain to enable Adaptive Headroom Voltage Control (AHVC). For single-device configurations or non-AHVC use cases, FB may be left unconnected or tied to a fixed voltage reference. However, omitting FB disables dynamic DC/DC optimization, resulting in fixed headroom and higher system power dissipation.
What diagnostic flags does the TLC69651QRTWRQ1 report, and how are they accessed?
The TLC69651QRTWRQ1 reports three diagnostic flags: LED Open Detection (LOD), LED Short Detection (LSD), and Thermal Shutdown Detection (TSD). These are accessible either via UART register reads or through the INT pin assertion combined with SOUT/CLK_O two-wire readback-both modes are software-selectable using configuration registers and require no additional hardware interfaces.
TLC69651QRTWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Constant Current
- Internal Switch(s):
- No
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 50V
- Current - Output / Channel:
- 30mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 24-WQFN (4x4)
TLC69651QRTWRQ1 FAQ
1.How can I place an order for TLC69651QRTWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69651QRTWRQ1 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 TLC69651QRTWRQ1 reliable?
The price and inventory of TLC69651QRTWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69651QRTWRQ1 is usually 5 days.
3.What payment methods are accepted for TLC69651QRTWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69651QRTWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69651QRTWRQ1?
TLC69651QRTWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69651QRTWRQ1 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 TLC69651QRTWRQ1?
For technical support, including TLC69651QRTWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69651QRTWRQ1 requirements.
6.How does Aetrix verify that TLC69651QRTWRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC69651QRTWRQ1 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 TLC69651QRTWRQ1 meets industry standards.
7.What is the process for return or replacement of TLC69651QRTWRQ1?
All TLC69651QRTWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC69651QRTWRQ1, 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 TLC69651QRTWRQ1 part is unused and in its original packaging.
Return procedure for TLC69651QRTWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69651QRTWRQ1 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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