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Texas Instruments TLC69668YBHR
- Part No.:
- TLC69668YBHR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-BGA, DSBGA
- Datasheet:
-
TLC69668YBHR.pdf
- Description:
- 128 MINI-LED MATRIX LOCAL DIMMIN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69668YBHR from Texas Instruments is a 16-channel, 8-time-multiplexing local dimming LED driver IC for LCD backlight systems, delivering 60mA per channel at up to 50V compliance voltage, ±2% device-to-device and channel-to-channel current matching, and 15-bit brightness resolution in hybrid PWM control mode.
For engineers reviewing the TLC69668YBHR datasheet, TLC69668YBHR pinout, TLC69668YBHR application, or TLC69668YBHR equivalent, this device supports high-density daisy-chained local dimming zones (up to 32,000+), adaptive headroom voltage control (AHVC) for DC/DC optimization, UART/interrupt and two-wire readback diagnostics, and VRR/flicker-free display operation.
Technical Context
The TLC69668YBHR implements time-multiplexed local dimming with 8× scan ratio, integrating 16 constant-current sinks, on-chip SRAM for per-zone brightness storage, and programmable black insertion and minimum latency update timing to eliminate motion artifacts. It operates in conjunction with the TLC696x0 scan MOSFET controller.
Its daisy-chain interface supports 20MHz data transfer with 1.8V/3.3V I/O compatibility, while diagnostics include per-zone LED open/short detection and thermal shutdown reporting via UART/INT or CLK_O/SOUT outputs. AHVC dynamically adjusts VLED headroom by sensing the last device's FB pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 constant-current sinks for independent LED zone control |
| Max output current / voltage | 60mA per channel at 50V compliance - supports high-brightness, high-Vf LED strings |
| Current accuracy | ±2% (typ.) device-to-device and channel-to-channel error - enables uniform luminance across large displays |
| Brightness resolution | Up to 15-bit - allows fine-grained dimming steps for HDR content rendering |
| Daisy-chain speed | Up to 20MHz serial data rate - minimizes frame update latency for >1000-device chains |
| Power consumption | ≤3.5mA (normal mode), ≤200μA (standby) - reduces system-level power overhead |
| Diagnostic reporting | LED open/short (LOD/LSD) and thermal shutdown (TSD) flags with UART/INT or CLK_O/SOUT readback - enables real-time fault isolation |
Pinout & Package
Package: DSBGA-24 (YBH), 1.58mm × 2.43mm, 0.4mm pitch, ball grid array with exposed thermal pad (Ball 25). RoHS-compliant, SnAgCu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | 3V–5.5V main power rail for logic and analog circuitry |
| GND | Ground reference | Common return path for all currents; connects to thermal pad for heat dissipation |
| CLK_I | Serial clock input | Accepts master clock for synchronous daisy-chain data latching |
| SIN | Serial data input | Receives configuration and brightness data from upstream device or host |
| SOUT | Serial data output | Drives downstream device in chain; supports diagnostic readback in two-wire mode |
| CLK_O | Serial clock output | Propagates synchronized clock to next device; used with SOUT for readback |
| FB | Feedback input | Connects only on last device in chain to regulate DC/DC output voltage via AHVC |
| OUT0–OUT15 | Constant-current outputs | 16 sinking terminals driving LED cathodes; each rated for 60mA/50V |
| INT | Interrupt output | Active-low open-drain flag signaling LOD, LSD, or TSD events |
| VLED | LED anode supply | High-side connection point for LED string anodes; decoupled externally |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Directs external DC/DC converter using FB pin of final device - eliminates per-device VLED regulation and simplifies PCB layout |
| Programmable black insertion | Inserts controlled black frames between refresh cycles - suppresses motion blur without requiring panel-level changes |
| Variable Refresh Rate (VRR) support | Maintains flicker-free dimming during dynamic frame rate switching - critical for gaming and adaptive sync displays |
| 4-phase-shifting EMI reduction | Staggered internal switching phases lower peak radiated emissions - eases EMC compliance in compact TV/monitor designs |
| Minimum brightness update latency | Reduces time between brightness register write and LED current change - preserves temporal fidelity in fast-changing HDR scenes |
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 LED current sink driver coordinating with TLC696x0 scan controller for 8× time-multiplexed zone addressing. Use Value: Enables deep black levels and >1,000,000:1 contrast ratio via precise per-zone 60mA/50V drive and 15-bit dimming resolution. |
Use Scenario: Professional-grade monitors requiring flicker-free VRR, low-latency HDR tone mapping, and uniform edge-lit backlighting. IC Role / Device Role / Timing Role: Local dimming engine managing 16 independent edge-lit LED zones with black insertion and AHVC-regulated VLED. Use Value: Eliminates motion blur and backlight strobing while reducing system power via adaptive headroom and <200μA standby current. |
| Notebook Display Backlight | Tablet HDR Backlight System |
|
Use Scenario: Thin-bezel ultrabooks using compact edge-lit local dimming with minimal board area. IC Role / Device Role / Timing Role: Space-constrained 16-channel LED driver in DSBGA-24 package, interfacing via 20MHz daisy chain to reduce routing layers. Use Value: Achieves 1.58mm × 2.43mm footprint and 0.4mm pitch - fits tight mechanical envelopes while supporting 15-bit brightness for Dolby Vision playback. |
Use Scenario: Premium tablets requiring battery-efficient, artifact-free HDR video playback with adaptive brightness scaling. IC Role / Device Role / Timing Role: Low-power local dimming controller with ≤3.5mA active current and UART-based diagnostics for field failure analysis. Use Value: Extends battery life via ultra-low ICC and enables OTA-updatable dimming profiles through embedded SRAM and flexible register interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69668RTWR | Same electrical specs and functionality, but in 4mm × 4mm WQFN-24 package with NIPDAU finish and different thermal pad layout. | Preferred for designs requiring higher thermal mass handling or standard QFN reflow profiles; less space-constrained than DSBGA. | Select TLC69668RTWR when board-level thermal management prioritizes exposed pad solderability over footprint size. |
| TLC69664YBHR | Identical DSBGA-24 package and pinout, but rated for 30mA/50V per channel instead of 60mA/50V. | Suitable for lower-brightness or lower-power LED strings where 30mA suffices; retains same 15-bit resolution and AHVC features. | Choose TLC69664YBHR for cost-sensitive or thermally limited designs where full 60mA capability is unnecessary. |
Compared with TLC69668RTWR and TLC69664YBHR, the TLC69668YBHR uniquely combines maximum 60mA/50V drive capability with the smallest available footprint (1.58mm × 2.43mm), making it optimal for ultra-thin, high-brightness portable and premium display applications where board area and thermal density are critical constraints.
Availability
TLC69668YBHR is available at Aetrix Electronics and suitable for TV, monitor, notebook, and tablet backlight systems requiring stable component supply, long-term production continuity, and automotive-qualified alternatives (e.g., TLC69668-Q1) for safety-critical implementations.
Supply support for TLC69668YBHR 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 high-reliability ICs, with decades of expertise in display power and timing solutions.
The TLC696x2/4/8 family is designed specifically for high-channel-count LCD local dimming systems, enabling scalable zone counts up to 32,000+ via daisy chaining while maintaining precision current matching and low-latency update performance.
FAQ
What is the maximum LED string voltage supported by TLC69668YBHR?
The TLC69668YBHR supports up to 50V compliance voltage per channel, allowing direct drive of multi-LED strings with forward voltages up to 50V. This enables fewer parallel strings and simplified thermal design in high-brightness TV and monitor backlights. The 60mA per-channel rating ensures sufficient current for modern high-efficiency LEDs without external amplification.
How does the Adaptive Headroom Voltage Control (AHVC) function in TLC69668YBHR?
AHVC in the TLC69668YBHR dynamically adjusts the VLED supply voltage by monitoring the FB pin of the last device in the daisy chain. This feedback loop minimizes excess headroom across all devices, reducing power loss and heat generation in the DC/DC converter. Only one FB connection is required - eliminating per-device sensing and simplifying system-level power architecture.
Can TLC69668YBHR be used in daisy-chain configurations exceeding 100 devices?
Yes, the TLC69668YBHR supports daisy-chain topologies of up to 1024 devices, enabling over 32,000 local dimming zones. Its 20MHz serial interface, 1.8V/3.3V I/O compatibility, and robust clock/data propagation ensure reliable communication even in long chains. Signal integrity is enhanced by programmable drive strength and integrated 4-phase EMI reduction.
What diagnostic capabilities does TLC69668YBHR provide for LED fault detection?
The TLC69668YBHR integrates per-channel LED open detection (LOD), LED short detection (LSD), and device thermal shutdown detection (TSD). Fault status is reported either via dedicated INT pin or through UART/INT and CLK_O/SOUT two-wire readback - enabling real-time system-level fault logging and graceful degradation without host processor intervention.
Is the TLC69668YBHR pin-compatible with other members of the TLC696x2/4/8 family?
Yes, all TLC696x2/4/8 variants - including TLC69668YBHR, TLC69664YBHR, and TLC69652YBHR - share identical DSBGA-24 (YBH) package dimensions, pinout, and interface protocol. This allows hardware reuse across brightness/voltage variants, with only firmware register settings needing adjustment to match the selected current/voltage grade.
TLC69668YBHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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:
- 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-DSBGA (1.58x2.43)
TLC69668YBHR FAQ
1.How can I place an order for TLC69668YBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69668YBHR 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 TLC69668YBHR reliable?
The price and inventory of TLC69668YBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69668YBHR is usually 5 days.
3.What payment methods are accepted for TLC69668YBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69668YBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69668YBHR?
TLC69668YBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69668YBHR 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 TLC69668YBHR?
For technical support, including TLC69668YBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69668YBHR requirements.
6.How does Aetrix verify that TLC69668YBHR is sourced from the original manufacturer or authorized distributors?
All TLC69668YBHR 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 TLC69668YBHR meets industry standards.
7.What is the process for return or replacement of TLC69668YBHR?
All TLC69668YBHR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69668YBHR, 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 TLC69668YBHR part is unused and in its original packaging.
Return procedure for TLC69668YBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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