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Texas Instruments TLC69611QRTWRQ1
- Part No.:
- TLC69611QRTWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69611QRTWRQ1.pdf
- Description:
- AUTOMOTIVE MINI-LED LOCAL DIMMIN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TLC69611QRTWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) 16-channel automotive LED driver IC designed for local dimming backlight control in LCD displays. It delivers 60mA per channel at up to 20V output compliance, with ±2% device-to-device and channel-to-channel current matching, and supports daisy-chained configurations for up to 16,000 zones in central infotainment displays.
For engineers reviewing the TLC69611QRTWRQ1 datasheet, TLC69611QRTWRQ1 pinout, TLC69611QRTWRQ1 application, or TLC69611QRTWRQ1 equivalent, key selection criteria include its 60mA/20V constant-current sink capability, adaptive headroom voltage control (AHVC), 15-bit brightness resolution, UART/interrupt or two-wire diagnostic readback, and wettable-flank WQFN-24 package for automotive thermal and reliability requirements.
Technical Context
The TLC69611QRTWRQ1 implements a daisy-chainable two-wire serial interface supporting up to 20MHz data transfer and interoperability with 1.8V/3.3V host logic. Its SRAM-based brightness storage enables zone-specific PWM/hybrid dimming with black insertion and variable refresh rate (VRR) support to enhance display contrast and motion clarity.
Integrated diagnostics include per-channel LED open/short detection (LOD/LSD), thermal shutdown (TSD), and dual readback paths-programmable UART/INT or CLK_O/SOUT-enabling real-time fault reporting without interrupting display operation in safety-critical automotive clusters and HUDs.
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 | 60mA per channel at up to 20V compliance - supports high-brightness LED strings in automotive displays |
| Current Matching Accuracy | ±2% (typ.) device-to-device and channel-to-channel - ensures uniform luminance across display zones |
| Brightness Resolution | Up to 15-bit - enables fine-grained dimming steps for smooth gradient rendering and reduced contouring |
| Supply Voltage Range | 3V to 5.5V VCC - compatible with standard automotive 3.3V/5V rail systems |
| Diagnostic Readback | Dual-mode: UART/INT or CLK_O/SOUT - allows flexible integration with host MCU interrupt or polling architecture |
| Power Consumption | ≤200μA standby, ≤3.5mA normal mode - minimizes system-level power budget impact in always-on displays |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm, wettable flank, exposed thermal pad, 0.5mm pitch, MSL Level-1 (UNLIM).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main supply for internal logic and gate drivers; bypass capacitor required |
| GND | Ground reference | Common return for analog/digital circuits and thermal pad connection point |
| CLK_I | Serial clock input | Accepts host-generated clock for synchronous daisy-chain data latching |
| 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; also used for diagnostic readback in two-wire mode |
| CLK_O | Serial clock output | Passes synchronized clock to next device; enables deterministic timing across long chains |
| FB | DC/DC feedback input | Connects only to last device's FB pin to enable adaptive headroom voltage control of external DC/DC converter |
| OUT0–OUT15 | Constant-current sink outputs | 16 high-side referenced current sources driving LED cathodes; each supports 60mA/20V |
| INT | Interrupt output | Active-low open-drain flag signaling LOD, LSD, or TSD events to host MCU |
| R1, R2 | Reference resistor inputs | Set global current scale via external precision resistors; determine full-scale 60mA output |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Directly regulates external DC/DC converter via single FB pin on last device - reduces power loss and heat generation in LED string supplies |
| Programmable EMI Reduction | Four integrated phase-shifting schemes and configurable drive strength - lowers radiated emissions without external filters |
| 15-Bit Hybrid Dimming | Combines global 8-bit max-current setting with per-channel PWM depth - achieves >32,000 brightness levels while minimizing flicker |
| Black Insertion & VRR Support | Hardware-accelerated frame blanking and variable refresh rate synchronization - improves motion clarity and reduces ghosting in HUDs/clusters |
| AEC-Q100 Grade 1 Qualification | Validated for –40°C to +125°C ambient operation with HBM Class 2 / CDM Class C4B ESD robustness - meets automotive electronics reliability standards |
Applications
| Automotive Central Infotainment Display | Automotive Digital Cluster Display |
|---|---|
Use Scenario: High-resolution LCD panel with localized dimming zones behind TFT glass in center console units. IC Role / Device Role / Timing Role: 16-channel constant-current sink managing individual LED zones; synchronizes dimming updates with display frame timing via AHVC and VRR signals. Use Value: Enables >10,000:1 contrast ratio and true black levels while maintaining low power draw and thermal stability under continuous operation. |
Use Scenario: Compact, high-brightness instrument cluster with dynamic gauge lighting and warning indicators. IC Role / Device Role / Timing Role: Drives segmented LED backlights with per-zone brightness control; uses black insertion to eliminate motion blur during rapid needle sweeps. Use Value: Delivers crisp, jitter-free graphics with minimal latency and no visible PWM artifacts at wide temperature ranges. |
| Automotive Heads-Up Display (HUD) | Advanced Driver Assistance System (ADAS) Display Overlay |
Use Scenario: Projection-based HUD requiring ultra-high contrast and zero-motion ghosting for critical speed/navigation data. IC Role / Device Role / Timing Role: Controls micro-LED or high-efficiency edge-lit backlight zones with sub-frame update capability and diagnostic reporting via INT pin. Use Value: Supports <5ms brightness update latency and real-time open/short detection - essential for functional safety compliance (ISO 26262 ASIL-B readiness). |
Use Scenario: Transparent combiner display overlaying ADAS alerts (e.g., lane departure, forward collision) onto windshield view. IC Role / Device Role / Timing Role: Provides independent dimming of alert zones versus background illumination; interfaces with camera- or radar-triggered MCU via UART readback. Use Value: Ensures alert visibility under direct sunlight while suppressing glare in low-light conditions through precise 15-bit luminance control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69611QPWPRQ1 | Same electrical specs, but HTSSOP-28 package (9.7mm × 4.4mm) with PowerPAD thermal enhancement | Better thermal dissipation in high-power, non-space-constrained modules; requires larger PCB footprint | Select when board layout allows larger package and thermal performance outweighs size constraints |
| TPS61196RGER | 16-channel, 50mA/40V, I²C interface, no daisy chain; lacks AHVC and VRR support | Targeted at non-automotive industrial displays; no AEC-Q100 qualification or diagnostic readback options | Consider only for cost-sensitive, non-safety-critical applications where daisy chaining and automotive qualification are not required |
Compared with TLC69611QPWPRQ1, the TLC69611QRTWRQ1 offers identical functionality in a smaller, wettable-flank WQFN-24 package optimized for automated optical inspection and high-reliability automotive reflow; versus TPS61196RGER, it provides superior automotive qualification, daisy-chain scalability, and integrated display-enhancing features like black insertion and VRR.
Availability
TLC69611QRTWRQ1 is available at Aetrix Electronics and suitable for automotive central infotainment displays, digital instrument clusters, and heads-up displays requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TLC69611QRTWRQ1 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 display interface solutions.
The TLC696x1-Q1 product line was engineered specifically for high-reliability automotive LCD local dimming, integrating diagnostics, adaptive power control, and display-quality enhancements to meet ASIL-ready system requirements.
FAQ
What is the maximum LED string voltage supported by the TLC69611QRTWRQ1?
The TLC69611QRTWRQ1 supports up to 20V output compliance per channel, enabling direct drive of multi-LED strings in automotive backlight applications. This 20V rating applies specifically to the TLC69611-Q1 variant - other family members (e.g., TLC69651-Q1) support 50V. The 20V limit is defined by the internal transistor breakdown voltage and must be respected to ensure long-term reliability under worst-case thermal conditions.
Does the TLC69611QRTWRQ1 require external current-setting resistors?
Yes, the TLC69611QRTWRQ1 uses two external precision resistors (R1 and R2) connected to dedicated pins to set the global current reference. These resistors determine the full-scale 60mA output per channel and directly impact accuracy - TI recommends 0.1% tolerance, 25ppm/°C drift metal-film types placed near the IC for thermal tracking. No internal DAC or trim is provided; calibration is resistor-dependent.
How does the adaptive headroom voltage control (AHVC) function in the TLC69611QRTWRQ1?
The TLC69611QRTWRQ1 implements AHVC by monitoring LED string voltage requirements across all 16 channels and dynamically adjusting the feedback (FB) signal sent to an external DC/DC converter. Only the FB pin of the last device in a daisy chain connects to the DC/DC converter, simplifying layout and ensuring optimal headroom - typically reducing power loss by 15–30% compared to fixed-voltage biasing.
Can the TLC69611QRTWRQ1 be used without daisy chaining?
Yes, the TLC69611QRTWRQ1 operates fully standalone with a single device. Its daisy-chain interface (CLK_I/SIN/SOUT/CLK_O) is optional - when unused, CLK_I and SIN connect to host MCU GPIOs, and SOUT/CLK_O remain unconnected. All core functions - current regulation, dimming, diagnostics - remain fully operational without chaining, making it suitable for compact 16-zone implementations.
What diagnostic faults does the TLC69611QRTWRQ1 report, and how are they signaled?
The TLC69611QRTWRQ1 reports three hardware-detected faults: LED open (LOD), LED short (LSD), and thermal shutdown (TSD). These are signaled either via active-low open-drain INT pin assertion or through register-read via UART/INT or CLK_O/SOUT two-wire interface. Each fault is latched and individually readable, enabling precise root-cause identification in automotive display systems without requiring continuous polling.
TLC69611QRTWRQ1 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:
- 20V
- 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)
TLC69611QRTWRQ1 FAQ
1.How can I place an order for TLC69611QRTWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69611QRTWRQ1 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 TLC69611QRTWRQ1 reliable?
The price and inventory of TLC69611QRTWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69611QRTWRQ1 is usually 5 days.
3.What payment methods are accepted for TLC69611QRTWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69611QRTWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69611QRTWRQ1?
TLC69611QRTWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69611QRTWRQ1 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 TLC69611QRTWRQ1?
For technical support, including TLC69611QRTWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69611QRTWRQ1 requirements.
6.How does Aetrix verify that TLC69611QRTWRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC69611QRTWRQ1 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 TLC69611QRTWRQ1 meets industry standards.
7.What is the process for return or replacement of TLC69611QRTWRQ1?
All TLC69611QRTWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC69611QRTWRQ1, 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 TLC69611QRTWRQ1 part is unused and in its original packaging.
Return procedure for TLC69611QRTWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69611QRTWRQ1 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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