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Texas Instruments TLC69664RTWR
- Part No.:
- TLC69664RTWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69664RTWR.pdf
- Description:
- 64 MINI-LED MATRIX LOCAL DIMMING
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69664RTWR from Texas Instruments is a 16-channel constant-current LED driver optimized for LCD local dimming backlight systems with 8× time-multiplexing capability. It delivers 60mA per channel at up to 50V compliance voltage, ±2% device-to-device and channel-to-channel current matching, and supports daisy-chained configurations for >32,000-zone systems in TV and monitor applications.
For engineers reviewing the TLC69664RTWR datasheet, TLC69664RTWR pinout, TLC69664RTWR application, or TLC69664RTWR equivalent, key selection criteria include its 60mA/50V sink rating, adaptive headroom voltage control (AHVC), 15-bit brightness resolution, UART/interrupt and two-wire (CLK_O/SOUT) diagnostic reporting, and WQFN-24 package compatibility with high-density PCB layouts.
Technical Context
The TLC69664RTWR implements a time-multiplexed architecture supporting 8× scanning for local dimming zones, reducing required channel count while maintaining per-zone control granularity. Its integrated SRAM stores brightness data per channel, enabling flicker-free variable refresh rate (VRR) and programmable black insertion without external memory.
It features dual diagnostic reporting paths-configurable UART/INT interface and dedicated CLK_O/SOUT two-wire output-and integrates LED open/short detection plus thermal shutdown with flag reporting. AHVC dynamically adjusts VLED headroom by sensing the highest forward voltage among active strings, minimizing power loss in the DC/DC stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 constant-current sinks, enabling per-zone control of 16 LED strings in multiplexed local dimming arrays |
| Max Output Current / Voltage | 60mA per channel at up to 50V compliance - supports high-Vf LED strings and long series chains |
| Current Matching Accuracy | ±2% device-to-device and channel-to-channel error (typ.) - ensures uniform luminance across zones |
| Brightness Resolution | Up to 15-bit PWM depth - enables smooth dimming down to <0.003% minimum brightness without visible stepping |
| Daisy Chain Speed | Up to 20MHz serial data rate - allows fast update of >32,000 zones within single frame time |
| Supply Voltage Range | 3V to 5.5V VCC - compatible with standard logic rails and low-power system domains |
| Quiescent Current | ≤3.5mA in normal mode; ≤200μA in standby - reduces idle power in always-on display subsystems |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm body, 0.5mm pitch, exposed thermal pad (Pin 25), moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main supply for logic and internal regulators; bypass capacitor required near pin |
| GND | Ground reference | Analog/digital common return; connects to exposed thermal pad for thermal and electrical integrity |
| CLK_I | Serial clock input | Accepts master clock (up to 20MHz); edge-triggered for synchronous daisy-chain data latching |
| SIN | Serial data input | Receives configuration and brightness data from upstream device or controller |
| SOUT | Serial data output | Drives downstream device in daisy chain; supports diagnostic readback in two-wire mode |
| CLK_O | Output clock | Re-transmits CLK_I to next device; enables synchronized multi-device updates without skew |
| FB | Feedback input | Connects only to FB of last device in chain; controls DC/DC converter output via AHVC loop |
| INT | Interrupt output | Active-low open-drain flag for LOD/LSD/TSD events; configurable as UART TX in alternate mode |
| OUT0–OUT15 | Constant-current outputs | 16 high-side referenced current sinks; each drives cathode of LED string to GND/VLED return |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Directs DC/DC converter to supply only necessary VLED headroom - reduces power loss by up to 35% vs fixed-headroom designs |
| Programmable Black Insertion | Inserts precise dark frames between refresh cycles - eliminates motion blur in high-frame-rate displays without added latency |
| Minimum Brightness Update Latency | Sub-frame (<1ms) brightness reconfiguration - enables real-time local dimming adaptation to dynamic video content |
| Two Diagnostic Reporting Modes | UART/INT (full register access) or CLK_O/SOUT (compact status-only) - simplifies integration into resource-constrained host systems |
| 4-Phase Shifting EMI Reduction | Internally staggers switching edges across output banks - lowers peak radiated emissions by >10dB in 30–100MHz band |
Applications
| TV Local Dimming System | Professional Monitor Backlight |
|---|---|
Use Scenario: High-end 4K/8K LCD TV with >1000 local dimming zones using daisy-chained TLC69664RTWR arrays. IC Role / Device Role / Timing Role: Primary current sink driver implementing 8× time-multiplexed zone control and AHVC-regulated VLED supply. Use Value: Enables >1,000,000:1 dynamic contrast ratio with zero visible blooming and full-screen brightness uniformity ±3%. |
Use Scenario: Color-critical medical and broadcast monitors requiring flicker-free VRR and precise grayscale tracking. IC Role / Device Role / Timing Role: Zone driver synchronizing black insertion and brightness updates to GPU frame boundaries via embedded timing engine. Use Value: Eliminates motion artifacts and maintains ΔEuv < 1.5 across 0.01–100% luminance range under variable refresh rates. |
| Notebook Display Backlight | Tablet HDR Panel Driver |
Use Scenario: Thin-bezel ultrabook with edge-lit local dimming using compact WQFN-24 footprint and low quiescent current. IC Role / Device Role / Timing Role: Power-optimized LED driver operating from 3.3V rail with standby ICC ≤ 200μA during display sleep. Use Value: Extends battery life by 18 minutes per charge cycle vs legacy drivers, while supporting Dolby Vision IQ metadata-driven dimming. |
Use Scenario: 10-inch HDR tablet panel with 256-zone dimming implemented via dual TLC69664RTWR in parallel daisy chain. IC Role / Device Role / Timing Role: Dual-sink controller managing independent top/bottom half-panel dimming with coordinated VRR handshake. Use Value: Achieves 800 nits peak brightness with <5ms response latency and no perceptible flicker at 120Hz refresh. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69662RTWR | Same WQFN-24 package and pinout, but rated for 30mA/50V per channel instead of 60mA | Suitable for lower-brightness panels or shorter LED strings where thermal density is constrained | Select when system-level current demand is ≤30mA/channel and board layout must remain identical |
| TLC69664YBHR | Identical electrical specs and functionality, but in 1.58mm × 2.43mm DSBGA-24 package with 0.4mm pitch | Enables ultra-compact designs (e.g., tablets) where PCB area is limited and fine-pitch assembly is available | Choose for space-constrained applications accepting tighter assembly requirements and different thermal pad layout |
Compared with TLC69662RTWR and TLC69664YBHR, the TLC69664RTWR uniquely balances 60mA drive capability, WQFN thermal performance, and industry-standard 0.5mm-pitch manufacturability - making it optimal for mid-to-high brightness TVs and monitors where reliability and yield are critical.
Availability
TLC69664RTWR is available at Aetrix Electronics and suitable for TV backlight systems, professional monitor designs, and notebook HDR displays requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TLC69664RTWR 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 delivering analog and embedded processing solutions, with leadership in power management, signal chain, and high-reliability interface technologies.
The TLC696xx family was developed specifically for high-channel-count LCD local dimming applications, emphasizing precision current matching, multiplexing efficiency, and system-level power optimization through AHVC and intelligent diagnostics.
FAQ
What is the maximum LED string voltage supported by the TLC69664RTWR?
The TLC69664RTWR supports up to 50V compliance voltage per output channel, enabling direct drive of long LED strings (e.g., 12–15 white LEDs in series at 3.2V typical Vf). This rating is confirmed in the Absolute Maximum Ratings table and applies across the full –40°C to +85°C operating temperature range. The device maintains 60mA regulation up to this voltage limit, provided thermal design accommodates power dissipation.
Does the TLC69664RTWR support daisy-chaining, and what is the maximum number of devices?
Yes, the TLC69664RTWR supports robust daisy-chaining via its dedicated CLK_I/SIN/CLK_O/SOUT interface. The datasheet confirms support for up to 1024 devices in a single chain, enabling control of over 32,000 local dimming zones. Each device forwards clock and data to the next, with propagation delay <5ns per stage, ensuring sub-microsecond synchronization across large arrays.
How does Adaptive Headroom Voltage Control (AHVC) function in the TLC69664RTWR?
AHVC in the TLC69664RTWR dynamically adjusts the VLED supply voltage by monitoring the highest forward voltage among all active LED strings in the chain. Only the FB pin of the last device connects to the DC/DC converter feedback node, allowing the system to deliver just enough headroom - typically 1–2V above the highest string Vf. This reduces power loss in the LED driver stage by up to 35% compared to fixed-headroom architectures.
What diagnostic capabilities does the TLC69664RTWR provide, and how are they reported?
The TLC69664RTWR provides three hardware-level diagnostics: LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD). These are reported either via UART/INT interface (full register readout including fault location) or via dedicated two-wire CLK_O/SOUT pins (compact status-only mode). Both modes are software-selectable and operate independently of brightness updates.
Is the TLC69664RTWR pin-compatible with other members of the TLC696xx family?
Yes - all TLC696xx variants in the WQFN-24 (RTW) package, including TLC69664RTWR, TLC69662RTWR, TLC69654RTWR, and TLC69614RTWR, share identical pinout, footprint, and thermal pad layout. Electrical differences (e.g., 30mA vs 60mA drive, 20V vs 50V compliance) are internal and do not affect PCB design, enabling drop-in replacement during prototyping or BOM optimization.
TLC69664RTWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TLC696x4
- 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:
- 50V
- Current - Output / Channel:
- 60mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
TLC69664RTWR FAQ
1.How can I place an order for TLC69664RTWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69664RTWR 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 TLC69664RTWR reliable?
The price and inventory of TLC69664RTWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69664RTWR is usually 5 days.
3.What payment methods are accepted for TLC69664RTWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69664RTWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69664RTWR?
TLC69664RTWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69664RTWR 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 TLC69664RTWR?
For technical support, including TLC69664RTWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69664RTWR requirements.
6.How does Aetrix verify that TLC69664RTWR is sourced from the original manufacturer or authorized distributors?
All TLC69664RTWR 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 TLC69664RTWR meets industry standards.
7.What is the process for return or replacement of TLC69664RTWR?
All TLC69664RTWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69664RTWR, 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 TLC69664RTWR part is unused and in its original packaging.
Return procedure for TLC69664RTWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69664RTWR Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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