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Texas Instruments TLC69661YBHR
- Part No.:
- TLC69661YBHR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-BGA, DSBGA
- Datasheet:
-
TLC69661YBHR.pdf
- Description:
- MINI-LED LOCAL DIMMING BACKLIGHT
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69661YBHR from Texas Instruments is a 16-channel constant-current LED sink driver for local dimming 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 - deployed in high-end LCD TVs requiring precise per-zone luminance control.
For engineers reviewing the TLC69661YBHR datasheet, TLC69661YBHR pinout, TLC69661YBHR application, or TLC69661YBHR equivalent, key selection criteria include its 60mA/50V output capability, adaptive headroom voltage control (AHVC), daisy-chainable 20MHz two-wire interface, UART/interrupt and SOUT/CLK_O diagnostic readback options, and DSBGA-24 (1.58mm × 2.43mm) package for ultra-compact display power management layouts.
Technical Context
The TLC69661YBHR implements a daisy-chainable two-wire serial interface supporting up to 1024 devices for 16,000-zone local dimming, with programmable interface drive strength and four integrated phase-shifting schemes to suppress EMI. Its AHVC function dynamically adjusts DC/DC feedback voltage using only the FB pin of the last device in chain, eliminating per-device FB routing.
Diagnostic functionality includes per-channel LED open/short detection (LOD/LSD), thermal shutdown detection (TSD), and dual readback modes: UART + INT pin or CLK_O + SOUT - all configurable via internal registers. Minimum brightness update latency and black insertion are hardware-accelerated to enable flicker-free variable refresh rate (VRR) operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3V to 5.5V - supports direct connection to standard logic rails without level-shifting. |
| Max Output Current / Voltage | 60mA / 50V - enables driving high-Vf LED strings (e.g., 12–15 white LEDs in series) with margin. |
| Current Matching | ±2% (typ.) device-to-device and channel-to-channel - ensures uniform zone luminance across large displays. |
| Brightness Resolution | Up to 15-bit - provides >32,000 grayscale steps for smooth dimming transitions and HDR contrast preservation. |
| Data Rate | Up to 20MHz - allows full 16-channel brightness update in <1µs, critical for low-latency VRR timing. |
| Power Consumption | ≤3.5mA (normal), ≤200µA (standby) - minimizes system-level power overhead in always-on display subsystems. |
| Diagnostic Outputs | UART + INT or CLK_O + SOUT - selectable register-controlled reporting paths for fault isolation without additional I/O pins. |
Pinout & Package
Package: DSBGA-24 (YBH), 1.58mm × 2.43mm body size, 0.4mm max height, ball pitch 0.4mm, exposed thermal pad (ball A1 corner marked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | Primary power rail (3V–5.5V); powers internal logic and gate drivers. |
| GND | Ground reference | Common return for logic, analog, and current-sink paths; multiple GND balls for low-impedance return. |
| CLK_I | Input clock | Accepts 1.8V/3.3V-compatible clock signal to synchronize daisy-chain data transfer. |
| SIN | Serial input | Receives 20MHz daisy-chain data from upstream device; latched on rising CLK_I edge. |
| SOUT | Serial output | Drives downstream device's SIN; supports diagnostic readback in SOUT/CLK_O mode. |
| CLK_O | Output clock | Forwarded CLK_I signal for downstream synchronization; used with SOUT for diagnostic readback. |
| FB | Feedback input | Only connected on last device in chain; controls DC/DC output voltage via AHVC loop. |
| INT | Interrupt output | Active-low open-drain flag indicating LOD, LSD, or TSD event; used with UART mode. |
| OUT0–OUT15 | Constant-current sinks | 16 independent 60mA/50V sinks; each connects to cathode of LED string in local dimming zone. |
| VLED | LED anode supply | High-voltage input (up to 50V) routed to all LED string anodes; shared across all 16 channels. |
| CVLED | Capacitor connection | Connects external capacitor to stabilize VLED rail and reduce ripple during fast PWM dimming. |
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 30% vs fixed-headroom designs. |
| Programmable Black Insertion | Hardware-timed blanking between frames eliminates motion blur without software intervention or frame buffer overhead. |
| Variable Refresh Rate (VRR) Support | Enables flicker-free 48–144Hz refresh switching via synchronized brightness updates and black insertion - no visible artifacts. |
| Dual Diagnostic Readback Modes | UART+INT or CLK_O+SOUT selection allows flexible integration: UART for detailed fault logging, CLK_O+SOUT for minimal-pin-count systems. |
| EMI Suppression Schemes | Four programmable phase-shift configurations spread energy across frequency spectrum, easing EMC compliance without external filters. |
Applications
| TV Local Dimming | Monitor Backlight Control |
|---|---|
Use Scenario: High-end 4K/8K LCD TV with 1000+ local dimming zones for HDR10+ and Dolby Vision playback. IC Role / Device Role / Timing Role: Primary 16-channel constant-current sink per zone; receives brightness commands via daisy-chained serial interface with sub-microsecond update latency. Use Value: Enables >1,000,000:1 dynamic contrast ratio through precise per-zone current control and black insertion, meeting UHD Alliance Premium TV certification. | Use Scenario: Professional-grade color-accurate monitor with flicker-free VRR for creative workflows and gaming. IC Role / Device Role / Timing Role: Local dimming driver synchronized to GPU frame timing; uses AHVC to maintain stable luminance across brightness and temperature shifts. Use Value: Eliminates PWM-induced flicker and motion blur via hardware black insertion and 15-bit dimming, preserving color fidelity at all brightness levels. |
| Notebook Display Backlight | Tablet HDR Panel Control |
Use Scenario: Thin-and-light Windows laptop with slim bezel, requiring compact 16-zone local dimming for battery-efficient HDR. IC Role / Device Role / Timing Role: Compact DSBGA-24 LED driver mounted near display flex; interfaces to EC or embedded controller via minimal 2-wire bus. Use Value: Achieves 30% longer battery life vs fixed-headroom solutions via AHVC, while maintaining >500 nits peak brightness and deep black levels. | Use Scenario: 10–12 inch Android/iPad tablet with HDR streaming and wide-gamut display. IC Role / Device Role / Timing Role: Zone driver operating in hybrid PWM/analog mode; leverages 15-bit resolution for smooth gradation in dark UI elements. Use Value: Delivers perceptually uniform dimming down to 0.005 nits with no banding, satisfying Netflix Calibrated Mode requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED local dimming driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69661RTWR | Same electrical specs, but WQFN-24 (4mm × 4mm) package - 6.5× larger footprint than DSBGA-24. | Preferred where thermal mass or reworkability outweighs board space constraints; requires different PCB land pattern and stencil design. | Select TLC69661RTWR when manual assembly, higher power dissipation, or legacy layout compatibility is prioritized over miniaturization. |
| TLC69651YBHR | Identical DSBGA-24 package and pinout, but rated for 30mA/50V - 50% lower per-channel current capacity. | Suitable for lower-brightness panels (e.g., tablets, portable monitors) where 60mA is unnecessary and cost reduction is critical. | Choose TLC69651YBHR only if panel LED forward voltage and total string current allow 30mA operation - verify thermal derating at full load. |
Compared with TLC69661YBHR, TLC69661RTWR trades board area for thermal robustness and ease of handling, while TLC69651YBHR reduces current capability to lower BOM cost - neither is pin-compatible without validation of current, thermal, and layout margins.
Availability
TLC69661YBHR is available at Aetrix Electronics and suitable for LCD TV backlight systems, professional monitor power management, and portable HDR display designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant production sourcing.
Supply support for TLC69661YBHR 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 specializing in analog, embedded processing, and digital signal technologies, with decades of leadership in power management and display interface ICs.
The TLC696x1 product line was designed specifically for high-channel-count local dimming in premium LCD displays, integrating adaptive voltage control, ultra-low latency updates, and robust diagnostics to replace discrete MOSFET+driver solutions.
FAQ
What is the maximum LED string voltage supported by the TLC69661YBHR?
The TLC69661YBHR supports up to 50V compliance voltage across its 16 constant-current sinks. This allows driving LED strings with total forward voltage up to 50V - typically 12–15 white LEDs in series at 3.3V each - while maintaining regulation under dynamic dimming conditions. The 50V rating is confirmed in TI's SLVSHB7 datasheet Section 1 (Features) and applies specifically to the TLC69661 variant, including the TLC69661YBHR orderable part.
Does the TLC69661YBHR require external components for basic operation?
Yes, the TLC69661YBHR requires three mandatory external components: a CVLED capacitor (typically 10µF ceramic) to stabilize the high-voltage LED supply rail, a pull-up resistor on the INT pin for interrupt signaling, and a feedback resistor divider on the FB pin - but only for the final device in a daisy chain. No external current-setting resistors are needed, as all 16 channels are internally trimmed to 60mA with ±2% matching. These requirements are specified in the "Simplified Schematic" and "Application Information" sections of the SLVSHB7 datasheet.
How does the adaptive headroom voltage control (AHVC) function in the TLC69661YBHR?
The TLC69661YBHR implements AHVC by monitoring the highest required VLED among all active channels and dynamically adjusting the DC/DC converter's output voltage via the FB pin - but only the last device in the daisy chain connects FB to the DC/DC. This eliminates per-device feedback routing and reduces system power loss by up to 30% compared to fixed-headroom designs. AHVC is enabled by default and requires no configuration; its operation is detailed in Section 3 (Description) and Figure 1-1 of the SLVSHB7 datasheet.
Can the TLC69661YBHR be used in automotive applications?
No - the standard TLC69661YBHR is rated for –40°C to +85°C operation and is not qualified to AEC-Q100. For automotive use, Texas Instruments offers the pin-compatible and functionally identical TLC69661-Q1 variant, which undergoes extended reliability testing, includes enhanced ESD protection, and is qualified for under-hood and infotainment display environments. The Q1 version is explicitly listed in the "OTHER QUALIFIED VERSIONS" section of the SLVSHB7 datasheet Addendum-Page 2.
What diagnostic faults does the TLC69661YBHR detect and report?
The TLC69661YBHR detects and reports three distinct hardware faults: LED open circuit (LOD) per channel, LED short circuit (LSD) per channel, and device thermal shutdown (TSD). Fault status is reported either via UART register reads plus active-low INT pin assertion, or via encoded pulse sequences on CLK_O and SOUT pins - selectable via configuration register. All diagnostics are hardware-implemented with no firmware dependency, as confirmed in Sections 1 (Features) and 3 (Description) of the SLVSHB7 datasheet.
TLC69661YBHR 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)
TLC69661YBHR FAQ
1.How can I place an order for TLC69661YBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69661YBHR 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 TLC69661YBHR reliable?
The price and inventory of TLC69661YBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69661YBHR is usually 5 days.
3.What payment methods are accepted for TLC69661YBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69661YBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69661YBHR?
TLC69661YBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69661YBHR 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 TLC69661YBHR?
For technical support, including TLC69661YBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69661YBHR requirements.
6.How does Aetrix verify that TLC69661YBHR is sourced from the original manufacturer or authorized distributors?
All TLC69661YBHR 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 TLC69661YBHR meets industry standards.
7.What is the process for return or replacement of TLC69661YBHR?
All TLC69661YBHR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69661YBHR, 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 TLC69661YBHR part is unused and in its original packaging.
Return procedure for TLC69661YBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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