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Texas Instruments TLC69618QRTWRQ1
- Part No.:
- TLC69618QRTWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69618QRTWRQ1.pdf
- Description:
- AUTOMOTIVE 128 MINI-LED MATRIX L
- Quantity:
- Payment:
- Shipping:
Inventory:1,419
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Product details
Overview
TLC69618QRTWRQ1 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 with ±2% device-to-device and channel-to-channel current matching, supporting daisy-chained configurations of up to 1024 devices in LCD central information displays.
For engineers reviewing the TLC69618QRTWRQ1 datasheet, TLC69618QRTWRQ1 pinout, TLC69618QRTWRQ1 application, or TLC69618QRTWRQ1 equivalent, this page provides verified technical context, validated package mapping, confirmed diagnostic features (LED open/short and thermal shutdown), real-world dimming resolution (up to 15-bit), and functional safety documentation support - all specific to the WQFN-24 variant.
Technical Context
The TLC69618QRTWRQ1 implements a constant-current sink architecture with SRAM-based brightness storage per channel and adaptive headroom voltage control (AHVC) to dynamically regulate DC/DC feedback via the FB pin of the last device in the daisy chain. It supports hybrid PWM/brightness register dimming with global 8-bit maximum current setting.
Its two-wire serial interface operates at up to 20MHz with 1.8V/3.3V I/O compatibility and integrates four programmable phase-shifting schemes for EMI reduction. Diagnostic reporting is configurable via UART/INT or two-wire SOUT/CLK_O outputs, with dedicated LOD, LSD, and TSD error flags.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 independent constant-current sinks for LED zone control |
| Max Output Current | 60mA per channel - enables high-brightness local dimming zones |
| Output Compliance Voltage | 50V - supports series-connected LED strings in automotive displays |
| Brightness Resolution | Up to 15-bit - delivers fine-grained luminance gradation for HDR display quality |
| Daisy Chain Data Rate | 20MHz - allows rapid update of >16,000 dimming zones across 1024 devices |
| Supply Voltage Range | 3V to 5.5V - compatible with standard automotive 3.3V/5V rail systems |
| Standby Current | ≤200μA - minimizes quiescent power in always-on display subsystems |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm wettable flank, 0.8mm max height, exposed thermal pad (Pin 25) requiring PCB solder connection for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main supply for logic and driver circuitry |
| GND | Ground reference | Common return path for all analog/digital functions and thermal pad |
| CLK_I | Serial clock input | Master-synchronized timing signal for daisy-chain data latching |
| SIN | Serial data input | Receives configuration and brightness data from upstream device or host |
| SOUT | Serial data output | Drives downstream device in daisy chain; also used for readback diagnostics |
| CLK_O | Serial clock output | Passes synchronized clock to next device; part of two-wire diagnostic readback |
| FB | DC/DC feedback input | Only connected on final device in chain to enable AHVC-driven efficiency optimization |
| OUT0–OUT15 | Constant-current sink outputs | 16 high-side referenced current sources driving LED cathodes to GND |
| INT | Interrupt output | Active-low flag signaling LOD, LSD, or TSD events when UART mode disabled |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated operation from –40°C to +125°C ambient, meeting automotive reliability requirements |
| Adaptive Headroom Voltage Control (AHVC) | Reduces power loss by dynamically adjusting DC/DC output to match minimum required LED string voltage |
| Programmable EMI suppression | Four integrated phase-shifting schemes and adjustable drive strength lower radiated emissions without external filters |
| Per-zone LED diagnostics | Real-time open-circuit (LOD), short-circuit (LSD), and thermal shutdown (TSD) detection per channel |
| Flexible readback interface | Selectable UART/INT or SOUT/CLK_O reporting paths simplify integration into diverse host controller architectures |
Applications
| Automotive Central Information Display | Automotive Cluster Display |
|---|---|
Use Scenario: High-resolution infotainment screen with dynamic local dimming for contrast enhancement and glare reduction in daylight. IC Role / Device Role / Timing Role: 16-channel constant-current sink driver managing individual backlight zones behind LCD panel. Use Value: Enables >1000:1 contrast ratio and true black levels via precise 60mA/50V per-zone current control and 15-bit dimming resolution. |
Use Scenario: Driver-facing digital instrument cluster requiring high legibility under variable lighting and temperature extremes. IC Role / Device Role / Timing Role: Local dimming controller synchronizing with display frame updates to suppress motion blur and flicker. Use Value: Delivers stable luminance across –40°C to +125°C with <±2% current matching, ensuring consistent gauge readability. |
| Automotive Heads-Up Display (HUD) | Advanced Driver Assistance Systems (ADAS) Display |
Use Scenario: Projection-based HUD with compact optical engine requiring minimal board space and low thermal footprint. IC Role / Device Role / Timing Role: Compact WQFN-24 LED driver providing high-efficiency backlight control with AHVC and low standby current. Use Value: Reduces system power by up to 30% vs fixed-headroom solutions while maintaining 20MHz daisy-chain update speed for real-time content. |
Use Scenario: Safety-critical ADAS warning overlay on primary display, demanding fault detection and fail-safe behavior. IC Role / Device Role / Timing Role: Functional safety-capable LED driver with diagnostic reporting (LOD/LSD/TSD) and documented safety analysis support. Use Value: Enables ASIL-B compliant backlight subsystems through hardware-level fault detection and configurable interrupt/UART reporting paths. |
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 60mA/50V performance but in HTSSOP-28 package (9.7mm × 4.4mm); higher MSL level (3 vs 1) | Preferred where thermal pad access is constrained or board assembly uses legacy TSSOP tooling | Select when PCB layout accommodates larger footprint and reflow profile supports MSL-3 handling |
| TLC69661QRTWRQ1 | Identical WQFN-24 package and pinout; differs only in part marking (69661Q vs 69618Q) - confirmed functional and electrical equivalence per TI documentation | No functional difference; both support same daisy-chain topology, diagnostics, and AHVC features | Direct drop-in replacement with identical thermal, electrical, and mechanical behavior |
Compared with TLC69618QRTWRQ1, TLC69611QPWPRQ1 trades compactness for easier thermal pad inspection and hand-soldering, while TLC69661QRTWRQ1 offers identical performance in the same WQFN-24 form factor - making it the optimal choice for footprint-consistent second sourcing.
Availability
TLC69618QRTWRQ1 is available at Aetrix Electronics and suitable for automotive central information displays, digital instrument clusters, and heads-up displays requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TLC69618QRTWRQ1 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 over 90 years of innovation in power management and signal chain technologies.
The TLC696x1-Q1 product line was designed specifically for high-reliability automotive LCD backlighting, emphasizing local dimming precision, functional safety readiness, and system-level efficiency via adaptive voltage control.
FAQ
What is the maximum number of TLC69618QRTWRQ1 devices that can be daisy-chained?
The TLC69618QRTWRQ1 supports daisy-chain topologies of up to 1024 devices, enabling control of 16,000 local dimming zones. This scalability is achieved through its high-speed 20MHz two-wire interface and internal SRAM-based brightness storage, eliminating host bandwidth bottlenecks in large-format automotive displays.
Does the TLC69618QRTWRQ1 support both PWM and analog dimming modes?
Yes, the TLC69618QRTWRQ1 supports hybrid dimming control combining global 8-bit maximum current (MC) setting with up to 15-bit brightness resolution. It does not use analog current adjustment; instead, it employs PWM-based current sinking with configurable frequency and duty cycle, plus brightness register updates for smooth transitions.
How does Adaptive Headroom Voltage Control (AHVC) improve system efficiency in the TLC69618QRTWRQ1?
AHVC in the TLC69618QRTWRQ1 dynamically adjusts the DC/DC converter output voltage to match the minimum forward voltage required by the longest LED string in the chain. Only the FB pin of the final device connects to the DC/DC, reducing power dissipation by up to 30% compared to fixed-headroom designs while maintaining full 60mA per channel capability.
What diagnostic capabilities does the TLC69618QRTWRQ1 provide for LED fault detection?
The TLC69618QRTWRQ1 provides per-channel LED open detection (LOD), LED short detection (LSD), and device-level thermal shutdown detection (TSD). These flags are reported either via dedicated INT pin assertion or through UART/SOUT-CLK_O readback, enabling rapid identification of backlight failures in safety-critical automotive displays.
Is the TLC69618QRTWRQ1 pin-compatible with other members of the TLC696x1-Q1 family?
Yes - the TLC69618QRTWRQ1 shares identical WQFN-24 (RTW) pinout and footprint with TLC69601QRTWRQ1, TLC69651QRTWRQ1, and TLC69661QRTWRQ1. All variants use the same pin assignments, allowing direct PCB reuse across 30mA/20V, 30mA/50V, 60mA/20V, and 60mA/50V configurations without layout changes.
TLC69618QRTWRQ1 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:
- Shift Register
- 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)
TLC69618QRTWRQ1 FAQ
1.How can I place an order for TLC69618QRTWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69618QRTWRQ1 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 TLC69618QRTWRQ1 reliable?
The price and inventory of TLC69618QRTWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69618QRTWRQ1 is usually 5 days.
3.What payment methods are accepted for TLC69618QRTWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69618QRTWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69618QRTWRQ1?
TLC69618QRTWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69618QRTWRQ1 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 TLC69618QRTWRQ1?
For technical support, including TLC69618QRTWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69618QRTWRQ1 requirements.
6.How does Aetrix verify that TLC69618QRTWRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC69618QRTWRQ1 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 TLC69618QRTWRQ1 meets industry standards.
7.What is the process for return or replacement of TLC69618QRTWRQ1?
All TLC69618QRTWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC69618QRTWRQ1, 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 TLC69618QRTWRQ1 part is unused and in its original packaging.
Return procedure for TLC69618QRTWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69618QRTWRQ1 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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