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Texas Instruments TLC69608YBHR
- Part No.:
- TLC69608YBHR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-BGA, DSBGA
- Datasheet:
-
TLC69608YBHR.pdf
- Description:
- 128 MINI-LED MATRIX LOCAL DIMMIN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69608YBHR from Texas Instruments is a 16-channel constant-current LED driver for LCD local dimming backlight systems, supporting 8-time-multiplexing operation with 30mA/20V per channel, ±2% device-to-device and channel-to-channel current matching, and adaptive headroom voltage control (AHVC) for DC/DC optimization in TV and monitor applications.
For engineers reviewing the TLC69608YBHR datasheet, TLC69608YBHR pinout, TLC69608YBHR application, or TLC69608YBHR equivalent, key selection criteria include its DSBGA-24 package size (1.58mm × 2.43mm), 15-bit brightness resolution, UART/interrupt or two-wire (CLK_O/SOUT) diagnostic readback, and support for variable refresh rate (VRR) without flicker in high-end display systems.
Technical Context
The TLC69608YBHR implements time-multiplexed local dimming using internal SRAM per channel to store brightness data and supports daisy-chained two-wire serial interface up to 1024 devices. Its AHVC scheme directly controls external DC/DC converters via the FB pin of the last device in chain, minimizing layout complexity.
Diagnostics include per-zone LED open/short detection and thermal shutdown, with configurable reporting via UART/INT or CLK_O/SOUT outputs. The device operates across 3V–5.5V VCC and supports 1.8V/3.3V I/O logic levels at up to 20MHz data rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3V to 5.5V - Enables direct compatibility with standard logic supply rails and low-dropout regulators in display power domains. |
| Output Current / Voltage | 30mA / 20V - Sustains full-brightness operation for mid-power LED strings in edge-lit or direct-lit LCD backlights. |
| Current Matching | ±2% (typ.) device-to-device and channel-to-channel - Ensures uniform luminance across dimming zones without software calibration. |
| Brightness Resolution | Up to 15-bit - Delivers >32,768 grayscale steps for smooth dimming transitions and elimination of contouring artifacts. |
| Data Rate | Up to 20MHz - Supports rapid zone updates required for VRR and black insertion features in 120Hz+ displays. |
| Power Consumption | ≤3.5mA (normal), ≤200μA (standby) - Minimizes system-level power overhead during active and idle states. |
| Diagnostic Reporting | UART/INT or CLK_O/SOUT - Provides flexible integration paths for host MCU firmware to handle LED fault recovery and thermal management. |
Pinout & Package
Package: DSBGA-24 (YBH), body size 1.58mm × 2.43mm, 0.4mm pitch, SNAGCU ball finish, MSL Level-1, -40°C to +85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | Primary power rail for internal logic and output drivers; decoupling required near pin. |
| GND | Ground reference | Common return path for all analog/digital circuits; must be low-impedance connection to PCB ground plane. |
| CLK_I | Serial clock input | Master-synchronized timing signal for daisy-chain data latching; accepts 1.8V/3.3V logic levels. |
| SIN | Serial data input | Receives configuration and brightness data from upstream device or host controller. |
| SOUT | Serial data output | Drives downstream device in daisy chain; also used for diagnostic readback in two-wire mode. |
| CLK_O | Serial clock output | Propagates synchronized clock to next device; enables precise inter-device timing alignment. |
| FB | Feedback input | Connects only to last device's FB pin to regulate DC/DC output voltage based on worst-case headroom demand. |
| INT | Interrupt output | Active-low open-drain signal indicating LOD, LSD, or TSD events; requires external pull-up. |
| OUT0–OUT15 | Constant-current sinks | 16 individually controlled LED current outputs; each connects to cathode of LED string in local dimming zone. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces DC/DC output voltage to minimum required by highest-VF LED string in chain, cutting power loss and heat generation. |
| Programmable Black Insertion | Inserts precise dark frames between video frames to enhance perceived contrast and reduce motion blur in fast-moving content. |
| Variable Refresh Rate (VRR) Support | Maintains stable LED current and timing during dynamic frame-rate changes, eliminating flicker and brightness instability. |
| Minimum Brightness Update Latency | Enables sub-frame LED reconfiguration for real-time local dimming adaptation to moving content blocks. |
| Per-Zone LED Open/Short Detection | Identifies failed LEDs or wiring faults per channel without requiring external sensing circuitry or MCU polling overhead. |
Applications
| TV Local Dimming | Monitor Backlight Control |
|---|---|
Use Scenario: High-end 4K/8K LCD TVs implementing full-array local dimming with >1000 zones. IC Role / Device Role / Timing Role: Primary constant-current sink driver enabling per-zone brightness modulation synchronized to video frame timing. Use Value: Achieves >1,000,000:1 effective contrast ratio through precise 30mA/20V current regulation and 15-bit dimming resolution. | Use Scenario: Professional-grade monitors requiring flicker-free VRR and HDR compliance. IC Role / Device Role / Timing Role: Time-multiplexed LED driver coordinating with GPU timing signals to maintain consistent luminance during dynamic refresh rate shifts. Use Value: Eliminates visible flicker and brightness jumps during VRR transitions via hardware-synchronized PWM and black insertion. |
| Notebook Display Backlight | Tablet Local Dimming System |
Use Scenario: Thin-bezel ultrabooks with edge-lit local dimming for improved battery life and contrast. IC Role / Device Role / Timing Role: Compact DSBGA-24 driver managing 16 LED segments along top/bottom bezel edges with minimal PCB area. Use Value: Reduces system power by 12–18% versus fixed-headroom solutions via AHVC, extending runtime without compromising peak brightness. | Use Scenario: Premium tablets using direct-lit local dimming for HDR video playback and creative applications. IC Role / Device Role / Timing Role: Daisy-chained node in multi-driver architecture supporting >256 zones with unified brightness control and fault reporting. Use Value: Enables real-time per-zone luminance correction using integrated diagnostics and low-latency update capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69608RTWR | Same electrical specs but WQFN-24 (4mm × 4mm) package; higher thermal mass, exposed thermal pad. | Better suited for high-power density designs where board space allows larger footprint and enhanced thermal dissipation. | Select when PCB layout permits 4×4mm area and thermal performance outweighs miniaturization needs. |
| TLC69604YBHR | Identical DSBGA-24 package and pinout, but supports only 4-time-multiplexing (vs. 8× for TLC69608YBHR). | Targeted at lower-zone-count displays (e.g., entry-level monitors) where reduced multiplexing simplifies timing and reduces MCU bandwidth. | Choose for cost-sensitive or lower-resolution local dimming systems where 4× multiplexing meets zone requirements. |
Compared with TLC69608RTWR and TLC69604YBHR, the TLC69608YBHR uniquely balances ultra-compact DSBGA packaging with 8× time-multiplexing capability-enabling higher zone counts in space-constrained portable displays without sacrificing diagnostic flexibility or VRR stability.
Availability
TLC69608YBHR is available at Aetrix Electronics and suitable for TV backlight systems, professional monitor designs, and premium notebook/tablet local dimming applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TLC69608YBHR 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 delivering analog, embedded processing, and connectivity solutions with focus on reliability, efficiency, and design enablement.
The TLC696x2/4/8 product line was engineered specifically for high-performance LCD local dimming backlight systems, emphasizing precision current matching, low-latency zone control, and seamless integration into daisy-chained display architectures.
FAQ
What is the maximum number of TLC69608YBHR devices that can be daisy-chained?
The TLC69608YBHR supports daisy chaining up to 1024 devices in a single two-wire serial chain, enabling control of over 32,000 independent local dimming zones. This scalability is achieved through dedicated CLK_O and SOUT pins that propagate timing and data without additional buffering, maintaining signal integrity at 20MHz data rates across the full chain length.
Does the TLC69608YBHR require external current-setting resistors?
No, the TLC69608YBHR does not require external current-setting resistors. It integrates precision internal current references and programmable global 8-bit maximum current (MC) control, delivering factory-trimmed 30mA output per channel with ±2% matching. External components are limited to VCC decoupling capacitors and optional pull-up on the INT pin.
How does Adaptive Headroom Voltage Control (AHVC) function in the TLC69608YBHR?
AHVC in the TLC69608YBHR dynamically adjusts the DC/DC converter output voltage by monitoring the forward voltage (VF) requirements of all 16 channels and feeding back only the highest needed headroom via the FB pin of the last device. This eliminates fixed-overhead voltage margins, reducing power loss and thermal stress while maintaining full LED brightness capability across all zones.
Can the TLC69608YBHR support both UART and two-wire diagnostic reporting simultaneously?
No, the TLC69608YBHR supports UART/INT or CLK_O/SOUT diagnostic reporting modes, but not both simultaneously. The mode is selected via configuration register settings during initialization. UART provides richer diagnostic data and command-response capability, while CLK_O/SOUT offers minimal pin count and deterministic timing for real-time fault flagging.
What is the operating temperature range and moisture sensitivity level (MSL) for the TLC69608YBHR?
The TLC69608YBHR is rated for operation from –40°C to +85°C and has a Moisture Sensitivity Level (MSL) rating of Level-1 at 260°C peak reflow, meaning it is not moisture-sensitive and may be stored indefinitely at ambient conditions without baking prior to assembly.
TLC69608YBHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TLC696x8
- Package/Case:
- 24-BGA, DSBGA
- 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:
- 20V
- 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-DSBGA (1.58x2.43)
TLC69608YBHR FAQ
1.How can I place an order for TLC69608YBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69608YBHR 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 TLC69608YBHR reliable?
The price and inventory of TLC69608YBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69608YBHR is usually 5 days.
3.What payment methods are accepted for TLC69608YBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69608YBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69608YBHR?
TLC69608YBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69608YBHR 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 TLC69608YBHR?
For technical support, including TLC69608YBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69608YBHR requirements.
6.How does Aetrix verify that TLC69608YBHR is sourced from the original manufacturer or authorized distributors?
All TLC69608YBHR 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 TLC69608YBHR meets industry standards.
7.What is the process for return or replacement of TLC69608YBHR?
All TLC69608YBHR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69608YBHR, 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 TLC69608YBHR part is unused and in its original packaging.
Return procedure for TLC69608YBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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