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Texas Instruments TLC69651YBHR
- Part No.:
- TLC69651YBHR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-BGA, DSBGA
- Datasheet:
-
TLC69651YBHR.pdf
- Description:
- LOCAL DIMMING MINI-LED BACKLIGHT
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69651YBHR from Texas Instruments is a 16-channel constant-current LED sink driver optimized for LCD local dimming backlight systems, delivering 30mA per channel with 50V compliance, ±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 TLC69651YBHR datasheet, TLC69651YBHR pinout, TLC69651YBHR application, or TLC69651YBHR equivalent, this page provides verified technical context, daisy-chain interface timing, diagnostic reporting options (UART/INT or SOUT/CLK_O), black insertion/VRR support, and package-specific layout guidance for DSBGA-24.
Technical Context
The TLC69651YBHR implements a 16-bit brightness resolution with hybrid PWM/current control, enabling precise local dimming zone management across up to 1024 daisy-chained devices. Its AHVC scheme dynamically adjusts VLED headroom by monitoring the FB pin of the last device in the chain, reducing power loss in the DC/DC stage.
It integrates three independent diagnostics-LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD)-with programmable readback via either UART + INT pin or two-wire SOUT/CLK_O output, supporting real-time fault isolation in high-reliability display systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3V to 5.5V - supports direct connection to standard logic supply rails without level-shifting. |
| Max Output Current / Voltage | 30mA / 50V - enables driving high-Vf LED strings (e.g., white LEDs in edge-lit TVs) with margin for aging and temperature drift. |
| Current Matching | ±2% (typ.) device-to-device and channel-to-channel - ensures uniform luminance across dimming zones without per-channel calibration. |
| Daisy-Chain Speed | Up to 20MHz - allows full 16-bit brightness update for 1024 devices in <1ms, critical for flicker-free variable refresh rate (VRR). |
| Power Consumption | ≤3.5mA (normal), ≤200μA (standby) - minimizes system standby power and thermal load in always-on displays. |
| Diagnostic Reporting | UART + INT or SOUT + CLK_O - provides flexible integration with host microcontrollers lacking dedicated UART peripherals. |
| Operating Temperature | –40°C to +85°C - qualified for consumer and industrial display environments including enclosed monitor enclosures. |
Pinout & Package
Package: DSBGA-24 (YBH), 1.58mm × 2.43mm, 0.4mm pitch, ball grid array with exposed thermal pad (ball 25). Compatible with standard reflow profiles (MSL Level-1, 260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | Primary power rail for internal logic and gate drivers; decoupling required within 2mm of pin. |
| GND | Ground reference | Common return for analog/digital circuits and thermal pad; must be low-impedance plane connection. |
| CLK_I | Input clock | Accepts 1.8V/3.3V-compatible serial clock up to 20MHz; synchronizes daisy-chain data transfer. |
| SIN | Serial data input | Receives 16-bit command + 16-bit data frame from upstream device or host controller. |
| SOUT | Serial data output | Drives next device in daisy chain; supports UART-style readback when configured as diagnostic output. |
| CLK_O | Output clock | Repeats CLK_I for downstream synchronization; used with SOUT for two-wire diagnostic reporting. |
| FB | Feedback input | Connects only to last device's FB pin in chain; controls DC/DC output voltage to minimize VLED headroom. |
| OUT0–OUT15 | Constant-current sinks | 16 high-side referenced outputs; each drives cathode of LED string with 30mA max and 50V compliance. |
| INT | Interrupt output | Active-low open-drain flag indicating LOD/LSD/TSD event; requires external pull-up for host polling. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces DC/DC output voltage to minimum required for all active LED strings, cutting system power loss by up to 35% vs fixed-headroom designs. |
| 15-bit Brightness Resolution | Enables smooth grayscale transitions down to 0.003% luminance, eliminating visible banding in dark scenes. |
| Programmable Black Insertion | Inserts configurable black frames between video frames to reduce motion blur without requiring panel-level hardware changes. |
| Variable Refresh Rate (VRR) Support | Maintains stable dimming during dynamic frame-rate switching (e.g., 48Hz–120Hz), preventing flicker and brightness instability. |
| Per-Zone LED Open/Short Detection | Identifies failed LEDs at individual channel level within 100μs, enabling graceful degradation instead of full-zone blackout. |
Applications
| TV Local Dimming | Monitor Backlight Control |
|---|---|
Use Scenario: High-end 4K/8K LCD TVs with >1000 local dimming zones for HDR contrast enhancement. IC Role / Device Role / Timing Role: Constant-current sink driver managing individual LED strings behind LCD panel; synchronized via daisy-chain clock for sub-millisecond zone updates. Use Value: Enables peak brightness >1000 nits and black levels <0.001 nits by precisely controlling 30mA/50V LED currents with ±2% matching across all zones. |
Use Scenario: Professional-grade monitors requiring flicker-free operation and accurate grayscale tracking across brightness levels. IC Role / Device Role / Timing Role: Local dimming controller interfacing with MCU over UART or interrupt-driven SOUT/CLK_O for real-time fault reporting. Use Value: Supports VRR and black insertion features to eliminate motion artifacts during fast-paced content, while AHVC reduces thermal load on monitor power supplies. |
| Notebook Display Backlight | Tablet HDR Implementation |
Use Scenario: Thin-bezel ultrabooks where space-constrained PCB layout demands minimal footprint and low standby power. IC Role / Device Role / Timing Role: Compact DSBGA-24 LED driver operating from 3.3V rail; leverages 200μA standby current to extend battery life during display sleep. Use Value: 1.58mm × 2.43mm package fits tight edge regions; 15-bit dimming resolves subtle ambient light adjustments without visible stepping. |
Use Scenario: HDR-capable tablets needing robust fault tolerance in portable form factor with limited thermal dissipation. IC Role / Device Role / Timing Role: Fault-aware backlight IC detecting LED opens/shorts per zone and reporting via INT pin to application processor. Use Value: Thermal shutdown detection prevents overheating in sealed tablet chassis; programmable diagnostics reduce need for external sense circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69651RTWR | Same electrical specs and register map, but in WQFN-24 (4mm × 4mm) package with exposed thermal pad. | Preferred for higher-power thermal management or legacy board layouts using QFN footprints. | Select TLC69651RTWR when PCB layout accommodates larger 4×4mm footprint and requires enhanced thermal conduction via exposed pad. |
| TLC69611YBHR | Identical DSBGA-24 package and pinout, but rated for 60mA/20V output instead of 30mA/50V. | Better suited for low-Vf LED strings (e.g., red/green/blue subpixels) where higher current matters more than high-voltage headroom. | Choose TLC69611YBHR when driving shorter LED strings with lower forward voltage and higher current demand, accepting reduced voltage margin. |
Compared with TLC69651YBHR, TLC69651RTWR offers superior thermal performance in space-permitting designs, while TLC69611YBHR trades 50V compliance for double the current drive-neither is pin-compatible without verifying layout clearance and thermal design.
Availability
TLC69651YBHR is available at Aetrix Electronics and suitable for TV backlight systems, professional monitor designs, and portable HDR display applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TLC69651YBHR 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 headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and consumer markets.
The TLC696x1 family was developed specifically for high-channel-count LCD local dimming systems, emphasizing precision current matching, daisy-chain scalability, and integrated display-quality enhancements like VRR and black insertion.
FAQ
What is the maximum number of TLC69651YBHR devices that can be daisy-chained?
The TLC69651YBHR supports up to 1024 devices in a single daisy chain, enabling control of 16,000 local dimming zones. This scalability is achieved through its 20MHz high-speed serial interface and SRAM-based brightness storage per device, eliminating host bandwidth bottlenecks in ultra-high-resolution displays.
Does the TLC69651YBHR require external current-setting resistors?
No, the TLC69651YBHR does not require external current-setting resistors. Its 30mA output current per channel is factory-trimmed and digitally adjustable via the global 8-bit Maximum Current (MC) register, ensuring ±2% matching without component tolerance dependencies or layout sensitivity.
How does Adaptive Headroom Voltage Control (AHVC) function in the TLC69651YBHR?
AHVC in the TLC69651YBHR dynamically adjusts the DC/DC converter output by monitoring the FB pin of the last device in the daisy chain. It sets VLED to the minimum voltage needed across all active channels, reducing power loss and heat generation without compromising LED string compliance.
What diagnostic reporting modes does the TLC69651YBHR support?
The TLC69651YBHR supports two diagnostic reporting modes: UART + INT pin for full register readback and event logging, or two-wire SOUT + CLK_O for compact interrupt-driven status flags. Mode selection is controlled via configuration registers, allowing flexibility for host MCU interface constraints.
Is the TLC69651YBHR pin-compatible with other TLC696x1 variants?
Yes, the TLC69651YBHR shares identical pinout and package (DSBGA-24) with TLC69601YBHR, TLC69611YBHR, and TLC69661YBHR. However, output current/voltage ratings differ-TLC69651YBHR is rated for 30mA/50V, so substituting other variants requires verification of LED string Vf and current requirements.
TLC69651YBHR 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:
- 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)
TLC69651YBHR FAQ
1.How can I place an order for TLC69651YBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69651YBHR 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 TLC69651YBHR reliable?
The price and inventory of TLC69651YBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69651YBHR is usually 5 days.
3.What payment methods are accepted for TLC69651YBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69651YBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69651YBHR?
TLC69651YBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69651YBHR 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 TLC69651YBHR?
For technical support, including TLC69651YBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69651YBHR requirements.
6.How does Aetrix verify that TLC69651YBHR is sourced from the original manufacturer or authorized distributors?
All TLC69651YBHR 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 TLC69651YBHR meets industry standards.
7.What is the process for return or replacement of TLC69651YBHR?
All TLC69651YBHR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69651YBHR, 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 TLC69651YBHR part is unused and in its original packaging.
Return procedure for TLC69651YBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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