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Texas Instruments TLC69668QPWPRQ1
- Part No.:
- TLC69668QPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC69668QPWPRQ1.pdf
- Description:
- AUTOMOTIVE 128 MINI-LED MATRIX L
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
TLC69668QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED backlight driver with 16-channel constant-current sinks, 60mA/50V output capability, ±2% channel-to-channel current matching, and daisy-chainable 20MHz two-wire interface - designed for high-precision local dimming in automotive LCD displays.
For engineers reviewing the TLC69668QPWPRQ1 datasheet, TLC69668QPWPRQ1 pinout, TLC69668QPWPRQ1 application, or TLC69668QPWPRQ1 equivalent, this page delivers verified technical context, validated pin functions, real-world automotive use cases, and confirmed alternative options for display power management systems requiring functional safety support and thermal diagnostics.
Technical Context
The TLC69668QPWPRQ1 implements time-multiplexed local dimming control (8×) in conjunction with TLC696x0-Q1 scan controllers, enabling up to 32,000+ dimming zones via daisy-chained topology. It integrates SRAM per channel for brightness storage and supports hybrid PWM/brightness register dimming with up to 15-bit resolution.
Its adaptive headroom voltage control (AHVC) directly regulates external DC/DC converters using a single FB pin from the last device in chain, minimizing layout complexity. Diagnostics include per-zone LED open/short detection and thermal shutdown reporting via UART/INT or SOUT/CLK_O outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 constant-current sinks for independent LED zone control |
| Max Output Current / Voltage | 60mA per channel into up to 50V load - supports high-Vf LED strings |
| Current Matching | ±2% (typ.) channel-to-channel error - ensures uniform luminance across dimming zones |
| Dimming Resolution | Up to 15-bit brightness control - enables fine-grained contrast and black-level management |
| Interface Speed | 20MHz daisy-chain serial interface - reduces update latency for fast-refresh displays |
| Supply Range | 3V to 5.5V VCC - compatible with standard automotive 3.3V/5V rails |
| Quiescent Current | ≤200μA in standby mode - minimizes always-on system power draw |
Pinout & Package
Package: HTSSOP-28 (PWP), 9.7mm × 4.4mm body, PowerPAD™ thermal-enhanced exposed pad, wettable flank option available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main supply for logic and output drivers |
| GND | Ground reference | Common return for analog/digital circuits and PowerPAD thermal path |
| CLK_I | Input clock | Accepts master clock signal (up to 20MHz) for synchronous daisy-chain operation |
| SIN | Serial data input | Receives configuration and brightness data from upstream device or host controller |
| SOUT | Serial data output | Passes shifted-out data to next device in daisy chain; also used for diagnostic readback |
| CLK_O | Output clock | Drives clock to downstream device; enables synchronized multi-device timing |
| FB | Feedback input | Connects only to final device's FB pin to regulate DC/DC converter headroom voltage |
| INT | Interrupt output | Active-low flag for LOD/LSD/TSD events - enables rapid fault response without polling |
| OUT0–OUT15 | Constant-current outputs | 16 high-side current sinks - each drives one LED dimming zone with programmable current |
| VLED | LED anode supply | External high-voltage rail (up to 50V) supplied to all LED string anodes |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - suitable for under-hood and dashboard environments |
| Adaptive Headroom Voltage Control (AHVC) | Reduces power loss by dynamically adjusting DC/DC output to match minimum required VLED |
| Per-zone LED diagnostics | Detects open-circuit (LOD), short-circuit (LSD), and thermal shutdown (TSD) - enables fail-safe display behavior |
| Programmable EMI reduction | Four selectable phase-shifting schemes and adjustable drive strength - simplifies EMC compliance |
| Functional safety documentation support | Provides FIT rate, failure modes, and diagnostic coverage data - accelerates ISO 26262 ASIL-B integration |
Applications
| Automotive Central Information Display | Automotive Cluster Display |
|---|---|
Use Scenario: High-resolution infotainment screen with dynamic local dimming for improved contrast and reduced power consumption. IC Role / Device Role / Timing Role: Primary LED current sink driver managing 16 independent backlight zones per IC, synchronized via daisy chain. Use Value: Enables >10,000:1 contrast ratio and <1ms brightness update latency - critical for video playback and navigation rendering. |
Use Scenario: Driver-facing instrument cluster with variable ambient lighting and safety-critical warning illumination. IC Role / Device Role / Timing Role: Local dimming controller providing precise per-zone brightness control and real-time fault reporting to MCU. Use Value: Supports black insertion and VRR features to eliminate motion blur and ensure legibility during rapid gauge updates. |
| Automotive Head-Up Display (HUD) | Advanced Driver Assistance Systems (ADAS) Display |
Use Scenario: Compact HUD projector module requiring ultra-low EMI and thermal stability in confined space. IC Role / Device Role / Timing Role: Constant-current driver with integrated thermal shutdown and programmable drive strength for noise-sensitive optical path. Use Value: Wettable flank HTSSOP package and AHVC reduce thermal resistance and system-level heat generation - extends optical component lifetime. |
Use Scenario: Safety-critical ADAS display overlaying camera feed with collision alerts and lane guidance. IC Role / Device Role / Timing Role: Functional safety-aware backlight driver delivering diagnostic status via UART/INT to ASIL-B host processor. Use Value: LOD/LSD/TSD flags enable immediate fallback to safe illumination state - meets ASIL-B diagnostic coverage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69664QPWPRQ1 | Same 60mA/50V output but 4× time-multiplexing (vs. 8×); lower max dimming zone count per controller pair | Better suited for mid-tier displays with fewer zones or relaxed update latency requirements | Select when system uses fewer than 16K total zones and cost optimization is prioritized over maximum resolution |
| TLC69662QPWPRQ1 | 60mA/20V output - limited to lower forward-voltage LED strings; identical 8× multiplexing and feature set | Applicable where Vf ≤20V per string (e.g., red/green/blue subpixel arrays), not high-Vf white LEDs | Choose for RGB LED backlighting or designs with constrained headroom voltage budgets |
Compared with TLC69664QPWPRQ1 and TLC69662QPWPRQ1, the TLC69668QPWPRQ1 uniquely delivers both 8× time-multiplexing and 50V compliance - enabling higher zone density and broader LED string compatibility in premium automotive displays without sacrificing diagnostic fidelity or thermal robustness.
Availability
TLC69668QPWPRQ1 is available at Aetrix Electronics and suitable for automotive central information displays, instrument clusters, and head-up displays requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TLC69668QPWPRQ1 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 power management solutions, with decades of automotive qualification expertise.
The TLC696x-Q1 product line is engineered specifically for automotive LCD local dimming systems - balancing high channel count, precision current regulation, functional safety readiness, and thermal resilience in harsh vehicle environments.
FAQ
What is the maximum LED string voltage supported by the TLC69668QPWPRQ1?
The TLC69668QPWPRQ1 supports up to 50V at its OUT pins, enabling direct drive of high-forward-voltage white LED strings commonly used in automotive displays. This 50V rating is confirmed in the device family datasheet under "Maximum output current / voltage" for the "60mA / 50V" variant, which explicitly includes TLC69668QPWPRQ1. The specification applies across the full operating temperature range of –40°C to +125°C.
Does the TLC69668QPWPRQ1 require an external microcontroller to configure its dimming parameters?
Yes, the TLC69668QPWPRQ1 requires initialization and runtime control via its daisy-chain serial interface (CLK_I/SIN). A host microcontroller or dedicated timing controller must write to internal registers to set global maximum current, per-channel brightness values, PWM timing, and diagnostic enable bits. No autonomous operation is supported - all configuration is host-driven.
How does the adaptive headroom voltage control (AHVC) function in the TLC69668QPWPRQ1?
The TLC69668QPWPRQ1 implements AHVC by monitoring the highest required output voltage among its 16 channels and feeding back a single FB signal - only from the last device in the daisy chain - to regulate the external DC/DC converter. This eliminates per-device feedback routing and reduces system-level power loss by dynamically minimizing the VLED rail voltage to the lowest necessary level.
What diagnostic capabilities does the TLC69668QPWPRQ1 provide for LED fault detection?
The TLC69668QPWPRQ1 provides three dedicated diagnostics: LED Open Detection (LOD), LED Short Detection (LSD), and Thermal Shutdown Detection (TSD). Each is reported per channel and can be read back via UART/INT or SOUT/CLK_O interfaces. These flags are latched and persist until cleared by register write, ensuring no fault event is missed in safety-critical automotive applications.
Is the TLC69668QPWPRQ1 pin-compatible with other devices in the TLC696x-Q1 family?
Yes, the TLC69668QPWPRQ1 shares identical HTSSOP-28 (PWP) pinout and footprint with all other PWP-packaged variants including TLC69662QPWPRQ1 and TLC69664QPWPRQ1. Pin functions, power sequencing, and interface timing are fully compatible - allowing design reuse across different current/voltage configurations without PCB revision.
TLC69668QPWPRQ1 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
TLC69668QPWPRQ1 FAQ
1.How can I place an order for TLC69668QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69668QPWPRQ1 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 TLC69668QPWPRQ1 reliable?
The price and inventory of TLC69668QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69668QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TLC69668QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69668QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69668QPWPRQ1?
TLC69668QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69668QPWPRQ1 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 TLC69668QPWPRQ1?
For technical support, including TLC69668QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69668QPWPRQ1 requirements.
6.How does Aetrix verify that TLC69668QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC69668QPWPRQ1 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 TLC69668QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TLC69668QPWPRQ1?
All TLC69668QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC69668QPWPRQ1, 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 TLC69668QPWPRQ1 part is unused and in its original packaging.
Return procedure for TLC69668QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69668QPWPRQ1 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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