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Texas Instruments TLC69658RTWR
- Part No.:
- TLC69658RTWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69658RTWR.pdf
- Description:
- 128 MINI-LED MATRIX LOCAL DIMMIN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69658RTWR from Texas Instruments is a 16-channel, 8-time-multiplexing local dimming LED driver with 30mA constant current sinks rated to 50V, ±2% channel-to-channel current matching, and adaptive headroom voltage control (AHVC) for LCD backlight systems in high-end TVs and monitors.
For engineers reviewing the TLC69658RTWR datasheet, TLC69658RTWR pinout, TLC69658RTWR application, or TLC69658RTWR equivalent, key selection criteria include its 50V output compliance, daisy-chainable 20MHz two-wire interface, programmable black insertion/VRR support, integrated LED open/short diagnostics, and WQFN-24 package with exposed thermal pad.
Technical Context
The TLC69658RTWR implements time-multiplexed local dimming using an internal 16× SRAM brightness buffer and supports up to 1024 devices in daisy chain for >32,000 zones. It interfaces via CLK_I/SIN/SOUT/CLK_O two-wire serial bus compatible with 1.8V/3.3V logic.
Its AHVC scheme directly controls external DC/DC converters via the FB pin of the last device in chain, minimizing system-level voltage overhead. Diagnostics include per-zone LED open/short detection and thermal shutdown, reported 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 | 30mA per channel up to 50V - enables high-brightness, high-Vf LED strings |
| Current Matching | ±2% (typ.) channel-to-channel error - ensures uniform luminance across zones |
| Brightness Resolution | Up to 15-bit PWM/hybrid dimming - supports deep dimming without visible stepping |
| Data Rate | Up to 20MHz daisy-chain interface - reduces frame update latency for VRR displays |
| Supply Voltage | 3V to 5.5V VCC - compatible with standard logic rails and low-power standby modes |
| Power Consumption | ≤3.5mA (normal), ≤200μA (standby) - minimizes system idle power |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm body, 0.5mm pitch, exposed thermal pad (Pin 25), moisture sensitivity level 1 (260°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main supply for logic and driver circuitry |
| GND | Ground reference | Common return for all analog/digital functions and thermal pad |
| CLK_I | Input clock | Accepts master clock signal for synchronous daisy-chain timing |
| SIN | Serial data input | Receives configuration and brightness data from upstream device or host |
| SOUT | Serial data output | Drives downstream device in daisy chain; also used for diagnostic readback |
| CLK_O | Output clock | Propagates synchronized clock to next device; used with SOUT for 2-wire readback |
| FB | Feedback input | Connects only on last device in chain to regulate DC/DC converter output voltage |
| OUT0–OUT15 | Constant-current outputs | 16 high-side current sinks driving LED cathodes; each supports 50V compliance |
| INT | Interrupt output | Active-low signal indicating LOD/LSD/TSD fault conditions |
| UART_TX/RX | Diagnostic interface | Configurable UART pins for register readback and fault reporting |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces DC/DC output voltage to minimum required for active LED strings, cutting system power loss by up to 30% |
| Programmable Black Insertion | Inserts controlled black frames between video frames to reduce motion blur without requiring panel-level changes |
| Variable Refresh Rate (VRR) Support | Enables flicker-free dimming updates synchronized to dynamic display refresh rates (e.g., 48–144Hz) |
| Per-Zone LED Diagnostics | Detects open-circuit and short-circuit faults on each of 16 outputs, enabling fail-safe backlight management |
| 4-Phase Shifting EMI Reduction | Internally staggers switching edges across channels to lower peak radiated emissions by >10dB at fundamental frequency |
Applications
| High-End LCD TV Backlight | Professional Monitor Backlight |
|---|---|
Use Scenario: 85-inch 4K/120Hz LCD TV with 1000+ local dimming zones for HDR10+ content playback. IC Role / Device Role / Timing Role: Primary local dimming controller managing 16 LED zones per IC; coordinated via daisy chain for full-panel control. Use Value: Enables >1,000,000:1 contrast ratio through precise per-zone current regulation and sub-frame black insertion. | Use Scenario: 32-inch 4K medical imaging monitor requiring flicker-free, calibrated dimming across clinical viewing modes. IC Role / Device Role / Timing Role: Zone driver in multi-IC stack supporting gamma-corrected brightness updates at 60–120Hz without visual artifacts. Use Value: 15-bit dimming resolution and VRR synchronization eliminate banding during DICOM grayscale transitions. |
| Gaming Notebook Backlight | Digital Signage Display |
Use Scenario: 16-inch OLED-competing notebook with mini-LED backlight and adaptive sync (G-Sync/FreeSync). IC Role / Device Role / Timing Role: Local dimming node in compact daisy chain; interfaces to GPU via embedded controller for real-time zone mapping. Use Value: 20MHz interface and minimum brightness update latency enable <1ms zone reconfiguration for fast-moving game scenes. | Use Scenario: 65-inch retail kiosk display operating 16/7 with ambient light-adaptive brightness and thermal derating. IC Role / Device Role / Timing Role: Robust LED driver with thermal shutdown detection and UART-based health monitoring over long-term operation. Use Value: Integrated TSD flag and 85°C operational rating ensure reliability in unventilated enclosures with continuous backlight load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED local dimming applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69654RTWR | Same 30mA/50V rating but 4-time-multiplexing architecture - lower zone density per IC | Requires more ICs for same number of dimming zones; higher PCB area and interconnect count | Select when system uses fewer than 500 total zones and cost-per-zone is prioritized over layout density |
| TLC69668RTWR | 60mA/50V output capability - doubles per-channel current drive vs. TLC69658RTWR | Supports higher-luminance LED strings or reduced channel count per zone; higher thermal dissipation | Select when driving high-Vf micro-LED arrays or when thermal design accommodates 2× IOUT per channel |
Compared with TLC69654RTWR and TLC69668RTWR, the TLC69658RTWR delivers optimal balance of zone density (8× multiplexing), thermal efficiency (30mA/50V), and diagnostic completeness for mid-to-high-tier LCD backlight systems where PCB space and per-zone precision are critical.
Availability
TLC69658RTWR is available at Aetrix Electronics and suitable for high-end LCD TV backlight, professional monitor backlight, gaming notebook backlight, and digital signage display applications requiring stable component supply, long lifecycle support, and automotive-grade traceability.
Supply support for TLC69658RTWR 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 for industrial, automotive, and consumer applications.
The TLC696x family is designed specifically for high-performance LCD local dimming backlight systems, emphasizing precision current matching, low-latency update, and system-level power optimization through AHVC and intelligent diagnostics.
FAQ
What is the maximum output voltage compliance of the TLC69658RTWR?
The TLC69658RTWR supports up to 50V output voltage compliance per channel, allowing direct drive of high-forward-voltage LED strings without external boost stages. This specification is confirmed in the device's absolute maximum ratings and electrical characteristics tables, and applies across the full operating temperature range of –40°C to +85°C. The 50V rating enables compatibility with modern mini-LED arrays and high-density backlight configurations.
Does the TLC69658RTWR support daisy-chain configuration, and what is the maximum data rate?
Yes, the TLC69658RTWR supports daisy-chain topology using its dedicated CLK_I, SIN, SOUT, and CLK_O pins. The interface operates at up to 20MHz, enabling rapid broadcast of brightness data across large chains. Each device forwards updated configuration to the next, supporting up to 1024 devices in a single chain. This capability is essential for scaling beyond 32,000 local dimming zones in premium displays while maintaining sub-millisecond frame update times.
How does the Adaptive Headroom Voltage Control (AHVC) function in the TLC69658RTWR?
The TLC69658RTWR implements AHVC by dynamically adjusting the feedback reference to an external DC/DC converter based on the highest forward voltage among active LED strings in the current time slice. Only the FB pin of the final device in the daisy chain connects to the DC/DC converter, simplifying layout and reducing component count. This closed-loop control minimizes excess headroom voltage, lowering system power consumption and heat generation without compromising dimming fidelity.
What diagnostic capabilities does the TLC69658RTWR provide for LED fault detection?
The TLC69658RTWR provides per-channel LED open detection (LOD), LED short detection (LSD), and device-level thermal shutdown detection (TSD). Fault status is reported either via the dedicated INT pin (active-low pulse) or through register readback using UART or the SOUT/CLK_O two-wire interface. These diagnostics are hardware-accelerated and operate independently of host communication, ensuring robust fault response even during firmware resets or bus interruptions.
What package type and thermal features does the TLC69658RTWR use?
The TLC69658RTWR uses the WQFN-24 (RTW) package: 4mm × 4mm body, 0.5mm pitch, with an exposed thermal pad (Pin 25) for enhanced heat dissipation. Its MSL Level-1 rating allows unlimited floor life at ≤30°C/60% RH, and the package supports standard reflow profiles up to 260°C peak. The thermal pad must be soldered to a dedicated PCB copper pour connected to ground for optimal junction-to-board thermal resistance (θJB ≈ 22°C/W).
TLC69658RTWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TLC696x8
- 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)
TLC69658RTWR FAQ
1.How can I place an order for TLC69658RTWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69658RTWR 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 TLC69658RTWR reliable?
The price and inventory of TLC69658RTWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69658RTWR is usually 5 days.
3.What payment methods are accepted for TLC69658RTWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69658RTWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69658RTWR?
TLC69658RTWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69658RTWR 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 TLC69658RTWR?
For technical support, including TLC69658RTWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69658RTWR requirements.
6.How does Aetrix verify that TLC69658RTWR is sourced from the original manufacturer or authorized distributors?
All TLC69658RTWR 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 TLC69658RTWR meets industry standards.
7.What is the process for return or replacement of TLC69658RTWR?
All TLC69658RTWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69658RTWR, 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 TLC69658RTWR part is unused and in its original packaging.
Return procedure for TLC69658RTWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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