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Texas Instruments TLC69661QPWPRQ1
- Part No.:
- TLC69661QPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC69661QPWPRQ1.pdf
- Description:
- AUTOMOTIVE MINI-LED LOCAL DIMMIN
- Quantity:
- Payment:
- Shipping:
Inventory:1,751
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Product details
Overview
TLC69661QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive 16-channel constant-current LED sink driver optimized for local dimming backlight systems, delivering 60mA per channel at up to 50V compliance voltage, ±2% channel-to-channel current matching, and 15-bit brightness resolution in automotive central displays, clusters, and HUDs.
For engineers reviewing the TLC69661QPWPRQ1 datasheet, TLC69661QPWPRQ1 pinout, TLC69661QPWPRQ1 application, or TLC69661QPWPRQ1 equivalent, key selection criteria include its 60mA/50V output capability, daisy-chainable 20MHz two-wire interface, adaptive headroom voltage control (AHVC), UART/interrupt and SOUT/CLK_O diagnostic readback options, and HTSSOP-28 wettable flank package with PowerPAD™ thermal pad.
Technical Context
The TLC69661QPWPRQ1 implements a daisy-chainable two-wire serial interface supporting up to 1024 devices for 16,000-zone local dimming, with programmable interface drive strength and four integrated phase-shifting schemes to reduce EMI. Its adaptive headroom voltage control (AHVC) directly regulates external DC/DC converters via a single FB pin from the last device in chain.
Diagnostics include per-channel LED open/short detection (LOD/LSD), thermal shutdown (TSD), and dual readback paths-configurable UART/INT or two-wire SOUT/CLK_O-enabling real-time fault reporting without interrupting PWM dimming operation.
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 with 50V compliance voltage - supports high-Vf LED strings in automotive displays |
| Current Matching | ±2% (typ.) channel-to-channel error - ensures uniform luminance across display zones |
| Brightness Resolution | Up to 15-bit PWM + 8-bit global max-current setting - enables fine-grained contrast and black-level control |
| Interface Speed | Up to 20MHz daisy-chain data rate - minimizes update latency for VRR and black insertion features |
| Supply Range | 3V to 5.5V VCC - compatible with standard automotive 3.3V/5V rails |
| Quiescent Current | ≤200μA in standby mode - reduces system power during display sleep states |
Pinout & Package
HTSSOP-28 (PWP) package with exposed thermal PowerPAD™, 9.7mm × 4.4mm body size, wettable flank leads for automated optical inspection (AOI), and moisture sensitivity level 3 (260°C peak reflow).
| 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 | Common return for logic, analog, and output current paths; connects to thermal pad |
| CLK_I | Serial clock input | Accepts 1.8V/3.3V-compatible clock for daisy-chain 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 SOUT/CLK_O mode |
| CLK_O | Serial clock output | Propagates synchronized clock to next device; used with SOUT for diagnostic readback |
| FB | Feedback input | Connects only from final device in chain to DC/DC converter for adaptive headroom control |
| 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; configurable via register |
| R1, R2 | Reference resistors | Set global current scale; R1 defines full-scale current, R2 adjusts fine-tuning range |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces power loss by dynamically adjusting DC/DC output to minimum required LED forward voltage plus margin |
| Programmable EMI reduction | Four selectable phase-shifting schemes + adjustable drive strength lower radiated emissions without external filters |
| Dual diagnostic readback | UART/INT and SOUT/CLK_O modes allow flexible integration into safety-critical display controllers with minimal pin count |
| Black insertion & VRR support | Minimizes motion blur and flicker in high-refresh-rate automotive displays via synchronized low-latency brightness updates |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ESD Level 2 and CDM Level C4B robustness |
Applications
| Automotive Central Information Display | Automotive Cluster Display |
|---|---|
Use Scenario: High-resolution LCD dashboard with dynamic local dimming for improved contrast and reduced glare under varying ambient light. IC Role / Device Role / Timing Role: 16-channel constant-current sink driving individual LED backlight zones; synchronized via daisy-chain interface to host timing controller. Use Value: Enables >10,000:1 contrast ratio and true black levels while maintaining AEC-Q100 reliability and functional safety readiness. |
Use Scenario: Driver-facing instrument cluster requiring high legibility, low power consumption, and thermal resilience in confined space. IC Role / Device Role / Timing Role: Local dimming controller managing segmented LED backlight zones behind TFT glass; operates in standby mode ≤200μA. Use Value: Delivers uniform brightness and zero-pixel bloom at temperature extremes, supported by per-zone open/short diagnostics. |
| Automotive Heads-Up Display (HUD) | Advanced Driver Assistance System (ADAS) Display |
Use Scenario: Compact projection-based HUD with high-brightness requirements and strict EMI limits in proximity to radar/sensors. IC Role / Device Role / Timing Role: LED driver implementing phase-shifted daisy-chain communication and AHVC to minimize conducted/radiated noise. Use Value: Meets CISPR 25 Class 5 emission limits while sustaining 60mA per channel at 50V for high-luminance projection optics. |
Use Scenario: Safety-critical ADAS display overlay requiring real-time fault detection and fail-safe dimming behavior. IC Role / Device Role / Timing Role: Functional safety-capable LED driver providing LOD/LSD/TSD flags via UART or INT pin for ASIL-B system monitoring. Use Value: Supports ISO 26262 diagnostic coverage with documented safety analysis and dual-path readback for redundancy validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69651QPWPRQ1 | Same 16-channel architecture but rated for 30mA/50V output - 50% lower per-channel current capacity | Suitable for lower-brightness or smaller-area displays where thermal budget limits total LED power | Select when system requires 50V compliance but <60mA/channel; retains identical pinout, interface, and diagnostics |
| TLC69611QPWPRQ1 | 60mA/20V rating - halved compliance voltage versus TLC69661QPWPRQ1's 50V capability | Applicable to short LED strings (e.g., 3–4 LEDs in series) in cost-sensitive entry-level automotive displays | Choose for 60mA performance where Vf <20V; shares same HTSSOP-28 footprint and register map but lacks 50V robustness |
Compared with TLC69651QPWPRQ1 and TLC69611QPWPRQ1, the TLC69661QPWPRQ1 uniquely delivers both high current (60mA) and high voltage (50V) in one package - enabling fewer drivers per display, simplified thermal design, and support for longer LED strings without external boost stages.
Availability
TLC69661QPWPRQ1 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 TLC69661QPWPRQ1 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 systems, integrating precision current control, daisy-chain scalability, functional safety features, and EMI-optimized interfaces to meet stringent vehicle display requirements.
FAQ
What is the maximum LED string voltage supported by the TLC69661QPWPRQ1?
The TLC69661QPWPRQ1 supports up to 50V compliance voltage per channel, enabling direct drive of longer LED strings (e.g., 10–12 white LEDs in series at typical forward voltage). This eliminates need for external boost converters in many automotive display designs and simplifies power architecture compared to 20V-rated alternatives like the TLC69611QPWPRQ1.
Does the TLC69661QPWPRQ1 support functional safety certification?
Yes, the TLC69661QPWPRQ1 is functional safety-capable with documentation available to aid ISO 26262 system-level design. It provides diagnostic coverage including LED open/short detection, thermal shutdown reporting, and dual readback paths (UART/INT and SOUT/CLK_O), supporting ASIL-B implementation in automotive display modules.
How does the adaptive headroom voltage control (AHVC) work in the TLC69661QPWPRQ1?
The TLC69661QPWPRQ1's AHVC monitors actual LED forward voltage across all channels and dynamically adjusts the external DC/DC converter output via a single FB pin on the last device in the daisy chain. This minimizes power dissipation in the driver while maintaining optimal headroom - reducing system heat and improving efficiency by up to 30% versus fixed-headroom designs.
Can multiple TLC69661QPWPRQ1 devices be connected in series, and what is the maximum chain length?
Yes, the TLC69661QPWPRQ1 supports daisy-chain topology using CLK_I/SIN inputs and CLK_O/SOUT outputs. Up to 1024 devices can be cascaded, enabling control of 16,000 local dimming zones. Data transfer runs at up to 20MHz, ensuring sub-millisecond update latency even in full-chain configurations for VRR and black insertion timing.
What package options are available for the TLC69661QPWPRQ1, and which is recommended for automotive thermal performance?
The TLC69661QPWPRQ1 is offered in HTSSOP-28 (PWP) and WQFN-24 (RTW) packages. For automotive applications requiring robust thermal management, the HTSSOP-28 with PowerPAD™ thermal pad is recommended - it provides superior heat dissipation via PCB copper area and supports AOI-compatible wettable flank leads for reliable solder joint inspection.
TLC69661QPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- 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
- Supplier Device Package:
- 28-HTSSOP
TLC69661QPWPRQ1 FAQ
1.How can I place an order for TLC69661QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69661QPWPRQ1 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 TLC69661QPWPRQ1 reliable?
The price and inventory of TLC69661QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69661QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TLC69661QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69661QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69661QPWPRQ1?
TLC69661QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69661QPWPRQ1 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 TLC69661QPWPRQ1?
For technical support, including TLC69661QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69661QPWPRQ1 requirements.
6.How does Aetrix verify that TLC69661QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC69661QPWPRQ1 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 TLC69661QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TLC69661QPWPRQ1?
All TLC69661QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC69661QPWPRQ1, 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 TLC69661QPWPRQ1 part is unused and in its original packaging.
Return procedure for TLC69661QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69661QPWPRQ1 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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