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Texas Instruments TLC69651QPWPRQ1
- Part No.:
- TLC69651QPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC69651QPWPRQ1.pdf
- Description:
- AUTOMOTIVE LOCAL DIMMING MINI-LE
- Quantity:
- Payment:
- Shipping:
Inventory:1,540
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Product details
Overview
TLC69651QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED driver IC for local dimming backlight systems, delivering 30mA per channel into up to 50V LED strings with ±2% device-to-device and channel-to-channel current matching, 15-bit brightness resolution, and adaptive headroom voltage control (AHVC) for optimized DC/DC efficiency in central infotainment displays.
For engineers reviewing the TLC69651QPWPRQ1 datasheet, TLC69651QPWPRQ1 pinout, TLC69651QPWPRQ1 application, or TLC69651QPWPRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive diagnostics (LED open/short, thermal shutdown), daisy-chain interface timing, and real-world design implications of AHVC and hybrid PWM control.
Technical Context
The TLC69651QPWPRQ1 implements a 16-channel constant-current sink architecture with integrated SRAM for per-channel brightness storage and supports daisy-chained two-wire serial topology (CLK_I/SIN/SOUT/CLK_O) at up to 20MHz for scalable local dimming zones. It uses adaptive headroom voltage control (AHVC) to dynamically adjust DC/DC feedback via the FB pin of the last device in chain, minimizing power loss across the LED string.
Diagnostics include per-zone LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD), with readback options via UART/INT or two-wire SOUT/CLK_O outputs. The device operates from 3V to 5.5V VCC and supports 1.8V/3.3V I/O logic levels for host interface compatibility.
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 | 30mA per channel into 50V LED strings - enables high-brightness, high-contrast automotive LCD backlights |
| Current accuracy | ±2% (typ.) device-to-device and channel-to-channel error - ensures uniform luminance across display zones |
| Brightness resolution | Up to 15-bit - supports fine-grained dimming for HDR and black-level fidelity |
| Daisy-chain data rate | Up to 20MHz - reduces update latency for fast-refresh displays and VRR support |
| Supply voltage range | 3V to 5.5V VCC - compatible with standard automotive 3.3V/5V rails and low-dropout regulators |
| 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 pad, wettable flank option available. RoHS-compliant, NIPDAU lead finish, MSL Level-3 (260°C, 168 hrs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main supply for internal logic and current sinks; decoupling required near pin |
| GND | Ground reference | Analog/digital ground return; tied to exposed thermal pad for thermal and EMI performance |
| CLK_I | Serial clock input | Master clock for daisy-chain interface; accepts 1.8V/3.3V logic; synchronizes data latching |
| SIN | Serial data input | Input for command/data stream to first device in chain; LSB-first, MSB-first configurable |
| SOUT | Serial data output | Pass-through output for daisy-chain; carries processed data to next device |
| CLK_O | Serial clock output | Re-driven clock for downstream devices; maintains signal integrity across long chains |
| FB | DC/DC feedback input | Only connected on final device in chain; used by AHVC to regulate headroom voltage |
| OUT0–OUT15 | Constant-current sink outputs | 16 high-voltage (50V) current sources; each drives one LED string cathode to GND |
| INT | Interrupt output | Open-drain diagnostic alert (LOD/LSD/TSD); requires external pull-up for host notification |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces power dissipation by dynamically adjusting DC/DC output to match minimum required LED forward voltage across all active zones |
| Programmable interface drive strength | Configurable slew rate and current drive for CLK_I/SIN to suppress EMI in noisy automotive environments |
| Integrated 4-phase shifting schemes | Minimizes peak current demand and conducted emissions during simultaneous channel updates |
| UART + INT or SOUT/CLK_O readback | Two mutually exclusive diagnostic reporting paths - UART enables full register access; SOUT/CLK_O supports minimal pin-count fault flagging |
| Black insertion & VRR support | Hardware-accelerated timing features to reduce motion blur and synchronize backlight dimming with variable refresh rate panels |
Applications
| Automotive Central Infotainment Display | Automotive Cluster Display |
|---|---|
Use Scenario: High-resolution LCD panel in center console requiring localized contrast enhancement and dynamic dimming zones. IC Role / Device Role / Timing Role: 16-channel constant-current sink driver managing individual LED backlight segments under microcontroller control via daisy-chain interface. Use Value: Enables >1000:1 contrast ratio and reduced power consumption through AHVC, meeting ISO 16750-2 transient immunity requirements. |
Use Scenario: Compact instrument cluster with segmented LCD needing precise luminance uniformity and fast response to driver alerts. IC Role / Device Role / Timing Role: Local dimming controller providing synchronized brightness updates across 16 zones with ≤100μs latency for warning indicators. Use Value: Achieves grade-specific luminance consistency (±5% across temperature) and supports black insertion for motion clarity during speed changes. |
| Automotive Heads-Up Display (HUD) | Advanced Driver Assistance Systems (ADAS) Display |
Use Scenario: Projection-based HUD requiring ultra-low latency backlight modulation to align with image rendering and eye-tracking signals. IC Role / Device Role / Timing Role: High-speed LED driver executing 15-bit dimming commands over 20MHz daisy chain with hardware VRR synchronization. Use Value: Delivers sub-frame update capability (<1ms) and eliminates flicker artifacts during rapid scene transitions in AR navigation overlays. |
Use Scenario: Safety-critical ADAS display overlaying camera feed with collision warnings, requiring guaranteed fault detection and fail-safe dimming behavior. IC Role / Device Role / Timing Role: Functional safety-capable LED driver performing continuous LOD/LSD/TSD diagnostics and reporting via INT pin or UART. Use Value: Supports ASIL-B decomposition via documented safety mechanisms and enables safe-degradation modes (e.g., reduced zone count on fault). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69661QPWPRQ1 | 60mA/50V output capability vs. 30mA/50V - higher current per channel, same package and interface | Required where higher LED string current or longer strings demand >30mA per zone | Select when driving high-luminance or multi-LED-per-zone configurations; shares identical pinout and register map |
| TLC69611QPWPRQ1 | 60mA/20V output - lower voltage rating but higher current; different VOUT clamp and thermal design point | Suitable for low-voltage LED arrays (e.g., edge-lit displays with <20V forward drop) where 50V headroom is unnecessary | Choose for cost-optimized designs with constrained board space and lower thermal load; not interchangeable without revalidation |
Compared with TLC69651QPWPRQ1, TLC69661QPWPRQ1 offers double the per-channel current for brighter zones without layout change, while TLC69611QPWPRQ1 trades voltage headroom for higher current density in thermally constrained applications - both require validation of LED string configuration and thermal management.
Availability
TLC69651QPWPRQ1 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 Grade 1 qualification, and functional safety documentation support.
Supply support for TLC69651QPWPRQ1 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, 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, emphasizing AEC-Q100 compliance, diagnostic robustness, and system-level efficiency via adaptive headroom control - targeting next-generation cockpit displays.
FAQ
What is the maximum LED string voltage supported by the TLC69651QPWPRQ1?
The TLC69651QPWPRQ1 supports up to 50V across its constant-current sink outputs (OUT0–OUT15), enabling direct drive of multi-LED series strings commonly used in automotive LCD backlights. This 50V rating is specified under worst-case conditions including temperature, process variation, and lifetime derating - no external voltage clamping is required for compliant LED configurations.
Does the TLC69651QPWPRQ1 support daisy-chaining, and how many devices can be cascaded?
Yes, the TLC69651QPWPRQ1 supports daisy-chaining via its two-wire serial interface (CLK_I/SIN/SOUT/CLK_O) and is designed to scale to up to 1024 devices in a single chain, supporting 16,000 local dimming zones. Each device passes through clock and data to the next, with only the final device's FB pin connected to the DC/DC converter for AHVC operation.
How does the Adaptive Headroom Voltage Control (AHVC) function in the TLC69651QPWPRQ1?
The TLC69651QPWPRQ1 implements AHVC by monitoring the highest forward voltage among active LED strings and feeding back only that value via the FB pin of the last device in the daisy chain. This allows the DC/DC converter to regulate precisely to the minimum required headroom, reducing power loss and heat generation compared to fixed-headroom designs.
What diagnostic capabilities does the TLC69651QPWPRQ1 provide, and how are they reported?
The TLC69651QPWPRQ1 provides LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD). These faults can be reported either through the open-drain INT pin (for interrupt-driven host response) or via serial readback using the UART interface or two-wire SOUT/CLK_O outputs - configuration is register-selectable.
Is the TLC69651QPWPRQ1 pin-compatible with other members of the TLC696x1-Q1 family?
Yes, the TLC69651QPWPRQ1 is pin-compatible with TLC69601QPWPRQ1, TLC69611QPWPRQ1, and TLC69661QPWPRQ1 in the HTSSOP-28 (PWP) package - all share identical pinout, footprint, and register map. Current and voltage ratings differ per variant, but PCB layout and firmware interface remain unchanged across the family.
TLC69651QPWPRQ1 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:
- 30mA
- 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
TLC69651QPWPRQ1 FAQ
1.How can I place an order for TLC69651QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69651QPWPRQ1 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 TLC69651QPWPRQ1 reliable?
The price and inventory of TLC69651QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69651QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TLC69651QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69651QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69651QPWPRQ1?
TLC69651QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69651QPWPRQ1 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 TLC69651QPWPRQ1?
For technical support, including TLC69651QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69651QPWPRQ1 requirements.
6.How does Aetrix verify that TLC69651QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC69651QPWPRQ1 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 TLC69651QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TLC69651QPWPRQ1?
All TLC69651QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC69651QPWPRQ1, 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 TLC69651QPWPRQ1 part is unused and in its original packaging.
Return procedure for TLC69651QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69651QPWPRQ1 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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