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Texas Instruments TLC69661QRTWRQ1
- Part No.:
- TLC69661QRTWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69661QRTWRQ1.pdf
- Description:
- AUTOMOTIVE MINI-LED LOCAL DIMMIN
- Quantity:
- Payment:
- Shipping:
Inventory:1,594
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Product details
Overview
TLC69661QRTWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) 16-channel automotive LED driver IC for local dimming backlight systems, delivering 60mA per channel at up to 50V output compliance, ±2% device-to-device and channel-to-channel current matching, and integrated UART/INT and SOUT/CLK_O diagnostic readback - deployed in central infotainment displays requiring precise per-zone brightness control.
For engineers reviewing the TLC69661QRTWRQ1 datasheet, TLC69661QRTWRQ1 pinout, TLC69661QRTWRQ1 application, or TLC69661QRTWRQ1 equivalent, this page delivers verified technical context, validated package mapping (WQFN-24), confirmed daisy-chain interface timing (20MHz), AHVC-based system efficiency optimization, and real-world diagnostic capability (LOD/LSD/TSD) for automotive display power architecture design.
Technical Context
The TLC69661QRTWRQ1 implements a constant-current sink architecture with SRAM-based brightness storage per channel, enabling up to 15-bit PWM/hybrid dimming resolution and black insertion/VRR support for high-fidelity LCD local dimming. Its adaptive headroom voltage control (AHVC) directly regulates external DC/DC via a single FB pin from the last device in daisy chain.
Diagnostics include per-channel LED open/short detection and thermal shutdown, reported through either UART/INT or two-wire SOUT/CLK_O - both programmable via register. The device supports 1.8V/3.3V I/O compatibility and scales to 1024 devices (16,000 zones) in serial topology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 independent constant-current sinks for per-zone LED driving |
| Max output current/voltage | 60mA per channel at up to 50V compliance - enables high-brightness, high-Vf LED strings |
| Current accuracy | ±2% (typ.) device-to-device and channel-to-channel matching - ensures uniform luminance across display zones |
| Dimming resolution | Up to 15-bit brightness control - supports fine-grained grayscale and HDR-compatible dimming profiles |
| Data rate | Up to 20MHz daisy-chain serial interface - minimizes update latency for dynamic local dimming |
| Supply voltage | 3V to 5.5V VCC - compatible with standard automotive 3.3V/5V rails |
| Quiescent current | ≤200μA in standby mode - reduces always-on system power draw |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm wettable flank, 0.8mm max height, exposed thermal pad (Pin 25) - optimized for automotive thermal cycling reliability and automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main supply for logic and output drivers; decoupling required near pin |
| GND | Ground reference | System ground return for analog/digital circuits and thermal pad connection |
| CLK_I | Serial clock input | Accepts 1.8V/3.3V-compatible clock for daisy-chain data synchronization |
| SIN | Serial data input | Receives configuration and brightness data from upstream device or host controller |
| SOUT | Serial data output | Drives downstream device in daisy chain; supports diagnostic readback in two-wire mode |
| CLK_O | Serial clock output | Passes synchronized clock to next device; used with SOUT for diagnostic reporting |
| FB | Feedback input | Connects only from final device in chain to DC/DC converter for AHVC regulation |
| OUT0–OUT15 | Constant-current outputs | 16 high-side referenced current sinks - each drives cathode of LED string to GND |
| INT | Interrupt output | Active-low open-drain flag signaling LOD, LSD, or TSD events to host MCU |
| NC | No connect | Pins 10, 11, 17, 22, 23 - reserved; must be left unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces power loss by dynamically adjusting DC/DC output to minimum required for all active LED strings |
| Programmable EMI reduction | Four integrated phase-shifting schemes and configurable drive strength lower radiated emissions in EMC-sensitive cabins |
| Dual diagnostic readback modes | UART/INT for full register access or compact SOUT/CLK_O for fault-only reporting - simplifies host firmware integration |
| Black insertion & VRR support | Hardware-accelerated frame-synchronized blanking and variable refresh rate coordination - improves motion clarity |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with HBM ESD Level 2 and CDM Level C4B - meets automotive reliability requirements |
Applications
| Automotive Central Infotainment Display | Automotive Digital Cluster Display |
|---|---|
Use Scenario: High-resolution TFT-LCD with 128+ local dimming zones for glare-free daytime visibility and deep-black contrast at night. IC Role / Device Role / Timing Role: Primary 16-channel constant-current sink driver managing per-zone LED current and brightness via daisy-chained serial interface. Use Value: Enables >100,000:1 dynamic contrast ratio while maintaining <±2% luminance uniformity across the display surface. |
Use Scenario: Compact instrument cluster with segmented backlight zones for speedometer, tachometer, and warning indicators. IC Role / Device Role / Timing Role: Local dimming controller coordinating with MCU over UART to adjust zone brightness based on ambient light and driver mode. Use Value: Reduces power consumption by 40% vs. fixed-brightness backlight while eliminating visual artifacts during rapid gauge transitions. |
| Automotive Heads-Up Display (HUD) | Advanced Driver Assistance System (ADAS) Display |
Use Scenario: Projection-based HUD requiring ultra-fast dimming response to avoid ghosting during vehicle acceleration/deceleration. IC Role / Device Role / Timing Role: Low-latency LED driver with black insertion feature synchronizing LED off-time to image frame boundaries. Use Value: Achieves sub-1ms brightness update latency and eliminates motion blur in critical safety-critical projection paths. |
Use Scenario: Rear-seat entertainment or ADAS status display with dynamic content-driven dimming (e.g., camera feed overlay, navigation highlights). IC Role / Device Role / Timing Role: Zone-aware backlight controller receiving real-time video analysis metadata to modulate specific LED groups. Use Value: Enhances readability of safety alerts by increasing local contrast around warning icons without affecting overall display power budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-channel automotive LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69611QRTWRQ1 | Same WQFN-24 package and interface, but rated for 60mA/20V output - lower voltage headroom | Suitable for low-Vf LED arrays (<20V total string drop); not viable for 50V-capable high-luminance strings | Select when system uses ≤20V LED strings and requires identical footprint/functionality with reduced voltage margin |
| TLC69661QPWPRQ1 | Same electrical specs (60mA/50V), but HTSSOP-28 package (9.7mm × 4.4mm) with PowerPAD thermal pad | Better thermal dissipation in high-ambient environments; larger PCB footprint and different land pattern | Choose for thermally constrained designs where WQFN-24 thermal performance is insufficient, accepting larger layout area |
Compared with TLC69611QRTWRQ1 and TLC69661QPWPRQ1, the TLC69661QRTWRQ1 uniquely balances 50V output capability with compact 4mm × 4mm wettable flank packaging - making it optimal for space-constrained, high-voltage automotive display modules requiring AOI-compliant assembly.
Availability
TLC69661QRTWRQ1 is available at Aetrix Electronics and suitable for automotive central infotainment displays, digital instrument clusters, and heads-up displays requiring stable component supply under AEC-Q100 Grade 1 conditions and long-term production continuity.
Supply support for TLC69661QRTWRQ1 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 automotive qualification expertise and functional safety documentation support.
The TLC696x1-Q1 product line was designed specifically for high-reliability automotive LCD local dimming systems - integrating precision current control, daisy-chain scalability, and built-in diagnostics to replace discrete LED driver solutions in safety-critical displays.
FAQ
What is the maximum LED string voltage supported by the TLC69661QRTWRQ1?
The TLC69661QRTWRQ1 supports up to 50V output compliance per channel, enabling direct drive of multi-LED strings with combined forward voltage up to 50V - verified in TI's production test conditions and specified in the absolute maximum ratings table of the SNVSCK8 datasheet.
Does the TLC69661QRTWRQ1 require external components for thermal protection?
No - the TLC69661QRTWRQ1 integrates thermal shutdown detection (TSD) with automatic output disable and INT pin assertion. It does not require external thermal sensors or circuitry, though proper PCB thermal pad soldering per SLUA271 is mandatory for reliable operation at 125°C ambient.
Can the TLC69661QRTWRQ1 be used without adaptive headroom voltage control (AHVC)?
Yes - AHVC is optional. The TLC69661QRTWRQ1 operates with fixed DC/DC output voltage; however, disabling AHVC forfeits system-level efficiency gains. The FB pin remains unused unless AHVC is enabled, and no additional configuration is needed for basic constant-current operation.
How many TLC69661QRTWRQ1 devices can be daisy-chained reliably?
The TLC69661QRTWRQ1 supports up to 1024 devices in a single daisy chain, enabling 16,000 local dimming zones. This scalability is validated at 20MHz data rate with proper signal integrity design - including controlled impedance traces and termination as outlined in TI's layout guidelines for RTW packages.
Is the TLC69661QRTWRQ1 pin-compatible with other TLC696x1-Q1 variants in WQFN-24?
Yes - all WQFN-24 variants (TLC69601QRTWRQ1, TLC69611QRTWRQ1, TLC69651QRTWRQ1, TLC69661QRTWRQ1) share identical pinout, package dimensions, and land pattern. Only electrical specifications (current/voltage rating) differ; no PCB redesign is needed when upgrading within the same package family.
TLC69661QRTWRQ1 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:
- 60mA
- 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)
TLC69661QRTWRQ1 FAQ
1.How can I place an order for TLC69661QRTWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69661QRTWRQ1 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 TLC69661QRTWRQ1 reliable?
The price and inventory of TLC69661QRTWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69661QRTWRQ1 is usually 5 days.
3.What payment methods are accepted for TLC69661QRTWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69661QRTWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69661QRTWRQ1?
TLC69661QRTWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69661QRTWRQ1 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 TLC69661QRTWRQ1?
For technical support, including TLC69661QRTWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69661QRTWRQ1 requirements.
6.How does Aetrix verify that TLC69661QRTWRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC69661QRTWRQ1 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 TLC69661QRTWRQ1 meets industry standards.
7.What is the process for return or replacement of TLC69661QRTWRQ1?
All TLC69661QRTWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC69661QRTWRQ1, 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 TLC69661QRTWRQ1 part is unused and in its original packaging.
Return procedure for TLC69661QRTWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69661QRTWRQ1 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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