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Texas Instruments TLC69654RTWR
- Part No.:
- TLC69654RTWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69654RTWR.pdf
- Description:
- 64 MINI-LED MATRIX LOCAL DIMMING
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69654RTWR from Texas Instruments is a 16-channel, constant-current LED driver optimized for LCD local dimming backlight systems with 4-time multiplexing support. It delivers 30mA per channel at up to 50V compliance voltage, features ±2% device-to-device and channel-to-channel current matching, and supports 15-bit brightness resolution via PWM/hybrid dimming control in TV and monitor applications.
For engineers reviewing the TLC69654RTWR datasheet, TLC69654RTWR pinout, TLC69654RTWR application, or TLC69654RTWR equivalent, key selection criteria include its 50V output capability, adaptive headroom voltage control (AHVC) for DC/DC optimization, UART/interrupt and two-wire (CLK_O/SOUT) diagnostic reporting, and daisy-chainable 20MHz serial interface compatible with 1.8V/3.3V logic.
Technical Context
The TLC69654RTWR implements time-multiplexed local dimming by driving 16 independent constant-current sinks with programmable global 8-bit maximum current (MC) setting and per-channel 15-bit brightness depth. Its AHVC scheme dynamically adjusts VLED headroom by monitoring the FB pin of the last device in a daisy chain to minimize power loss across the LED string.
Diagnostics include per-zone LED open/short detection and thermal shutdown, reported via either UART/INT or CLK_O/SOUT two-wire output - selectable via register configuration. The device operates from 3V to 5.5V VCC and integrates 4-phase-shifting EMI reduction and black insertion/VRR features to eliminate flicker during variable refresh rate operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3V to 5.5V - supports direct connection to standard logic supply rails without LDO overhead. |
| Output Current / Voltage | 30mA per channel, 50V compliance - enables high-Vf LED strings (e.g., white LEDs in series) in large-panel backlights. |
| Current Accuracy | ±2% device-to-device and channel-to-channel error (typ.) - ensures uniform luminance across dimming zones without per-channel calibration. |
| Brightness Resolution | Up to 15-bit - provides fine-grained grayscale control for high-dynamic-range (HDR) local dimming with minimal contouring artifacts. |
| Data Rate | Up to 20MHz daisy-chain interface - allows >32,000 zones (1024 devices × 16 channels) with low update latency for real-time video processing. |
| Power Consumption | ≤3.5mA ICC in normal mode; ≤200μA in standby - reduces system-level power budget in always-on display subsystems. |
| Diagnostic Reporting | UART/INT or CLK_O/SOUT selectable - enables flexible integration with host MCU interrupt handling or low-pin-count status polling. |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm body, 0.5mm pitch, exposed thermal pad (Pin 25). RoHS-compliant, NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | 3V–5.5V main power rail for internal logic and current sinks. |
| GND | Ground reference | Common return path for all analog/digital circuits and current sink outputs. |
| CLK_I | Serial clock input | Accepts master clock for synchronous daisy-chain data transfer (up to 20MHz). |
| SIN | Serial data input | Receives command/data from upstream device or host controller in daisy-chain topology. |
| SOUT | Serial data output | Drives downstream device or host with readback data (diagnostics, status) in two-wire mode. |
| CLK_O | Serial clock output | Propagates synchronized clock to next device; used with SOUT for diagnostic readback. |
| FB | Feedback input | Connects only to last device's FB pin to regulate DC/DC converter output via AHVC loop. |
| OUT0–OUT15 | Constant-current sinks | 16 high-side current outputs; each drives one LED zone with 30mA/50V capability. |
| INT | Interrupt output | Active-low open-drain flag signaling LOD, LSD, or TSD events when UART mode is disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces VLED overhead by dynamically adjusting DC/DC output based on worst-case channel forward voltage - cuts power loss and heat in large backlight arrays. |
| Programmable Black Insertion & VRR Support | Enables flicker-free variable refresh rate operation by synchronizing LED blanking with panel timing - critical for gaming and HDR video. |
| Per-Zone LED Open/Short Detection | Identifies failed LEDs or wiring faults in real time across all 16 channels without external sensing components - improves field reliability. |
| 4-Phase-Shifting EMI Reduction | Spreads switching noise spectrum across four interleaved phases - simplifies EMI filter design and meets CISPR-32 Class B limits. |
| Minimum Brightness Update Latency | Ensures sub-frame response for dynamic metadata-driven dimming (e.g., Dolby Vision) - avoids motion blur and halo artifacts. |
Applications
| TV Backlight Systems | Professional Monitor Backlights |
|---|---|
|
Use Scenario: High-end 4K/8K LCD TVs implementing full-array local dimming with >1000 zones. IC Role / Device Role / Timing Role: Primary 16-channel constant-current sink managing one physical dimming zone per channel in 4× time-multiplexed configuration. Use Value: Enables 50V compliance to drive longer LED strings per zone, reducing PCB routing complexity and improving contrast ratio beyond 1,000,000:1. |
Use Scenario: Color-critical medical and broadcast monitors requiring precise luminance uniformity and flicker-free operation. IC Role / Device Role / Timing Role: Local dimming controller synchronized to video frame timing via VRR and black insertion features. Use Value: Eliminates temporal artifacts during slow-motion playback and high-refresh-rate content using programmable update latency and phase-shifted EMI control. |
| Notebook Display Backlights | Tablet & Portable Display Modules |
|
Use Scenario: Thin-bezel premium notebooks with edge-lit or direct-lit local dimming for HDR content rendering. IC Role / Device Role / Timing Role: Compact WQFN-24 LED driver interfacing with embedded controller over daisy-chained 20MHz serial bus. Use Value: 30mA/50V output and ±2% matching ensure consistent brightness across narrow bezel zones while minimizing thermal footprint. |
Use Scenario: Battery-powered tablets requiring low-power local dimming with diagnostic visibility for field failure analysis. IC Role / Device Role / Timing Role: Power-efficient backlight driver with UART/INT diagnostics and ≤200μA standby current. Use Value: Extends battery life via ultra-low ICC in standby and enables remote fault logging through interrupt-triggered UART readback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69652RTWR | Same 30mA/50V rating but 2× time-multiplexing (not 4×); identical pinout and package. | Targeted for lower-zone-count panels where reduced multiplexing simplifies timing control and reduces MCU processing load. | Select when system requires fewer than 500 local dimming zones and simpler timing synchronization. |
| TLC69658RTWR | Same 30mA/50V rating with 8× time-multiplexing; identical pinout and package. | Optimized for ultra-high-density dimming (e.g., >2000 zones) where maximum zone count per driver minimizes component count. | Select when maximizing zones per IC is critical and host MCU supports higher-frequency daisy-chain timing. |
Compared with TLC69652RTWR and TLC69658RTWR, the TLC69654RTWR provides the optimal balance of zone density, timing flexibility, and MCU resource usage for mid-to-high-tier 4K displays - delivering 4× multiplexing without over-provisioning or under-utilizing bandwidth.
Availability
TLC69654RTWR is available at Aetrix Electronics and suitable for TV backlight systems, professional monitor designs, and notebook display modules requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for TLC69654RTWR 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 digital signal technologies with over 90 years of innovation in power management and precision analog solutions.
The TLC696x family was designed specifically for high-performance LCD local dimming backlight systems, enabling scalable zone counts, adaptive power efficiency, and real-time diagnostics in consumer and professional displays.
FAQ
What is the maximum output voltage compliance of the TLC69654RTWR?
The TLC69654RTWR supports up to 50V output voltage compliance per channel, allowing it to drive longer series strings of high-forward-voltage white LEDs commonly used in large-format LCD backlights. This specification is confirmed in the device family datasheet under the "Maximum output current / voltage" table for the TLC6965x variant group, and applies directly to the TLC69654RTWR.
Does the TLC69654RTWR support daisy-chaining, and what is the maximum data rate?
Yes, the TLC69654RTWR supports daisy-chain topology using its dedicated CLK_I, SIN, SOUT, and CLK_O pins. It achieves a maximum data transfer rate of 20MHz, enabling fast configuration and status readback across large arrays - up to 1024 devices supporting over 32,000 local dimming zones. This capability is explicitly documented in the "High speed daisy chain interface" feature list.
How does the Adaptive Headroom Voltage Control (AHVC) function in the TLC69654RTWR?
The TLC69654RTWR implements AHVC by monitoring the FB pin of the last device in the daisy chain to dynamically adjust the DC/DC converter's output voltage, minimizing excess headroom across all 16 channels. This reduces power dissipation and thermal stress without requiring external feedback circuitry - a core feature highlighted in the device description and functional block diagram.
What diagnostic functions does the TLC69654RTWR provide, and how are they reported?
The TLC69654RTWR provides LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD) for each of its 16 channels. These diagnostics can be reported via either UART + INT pin or two-wire CLK_O/SOUT output - selected by register configuration. This dual-reporting option is detailed in the "Diagnostics" section and supported by the pinout and register map in the datasheet.
Is the TLC69654RTWR pin-compatible with other members of the TLC696x family?
Yes, the TLC69654RTWR shares identical WQFN-24 (RTW) package dimensions, pin assignment, and electrical interface with all TLC696x2/4/8 variants including TLC69652RTWR and TLC69658RTWR. This mechanical and functional compatibility is confirmed in the Package Outline drawings and Orderable Addendum, enabling drop-in replacement within the same multiplexing configuration.
TLC69654RTWR 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:
- 30mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
TLC69654RTWR FAQ
1.How can I place an order for TLC69654RTWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69654RTWR 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 TLC69654RTWR reliable?
The price and inventory of TLC69654RTWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69654RTWR is usually 5 days.
3.What payment methods are accepted for TLC69654RTWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69654RTWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69654RTWR?
TLC69654RTWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69654RTWR 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 TLC69654RTWR?
For technical support, including TLC69654RTWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69654RTWR requirements.
6.How does Aetrix verify that TLC69654RTWR is sourced from the original manufacturer or authorized distributors?
All TLC69654RTWR 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 TLC69654RTWR meets industry standards.
7.What is the process for return or replacement of TLC69654RTWR?
All TLC69654RTWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69654RTWR, 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 TLC69654RTWR part is unused and in its original packaging.
Return procedure for TLC69654RTWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69654RTWR Tags
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