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Texas Instruments TLC69664YBHR
- Part No.:
- TLC69664YBHR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-BGA, DSBGA
- Datasheet:
-
TLC69664YBHR.pdf
- Description:
- 64 MINI-LED MATRIX LOCAL DIMMING
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69664YBHR from Texas Instruments is a 16-channel constant-current LED driver for LCD local dimming backlight systems, supporting 4-time multiplexing with 60mA per channel at up to 50V compliance voltage, ±2% device-to-device and channel-to-channel current matching, and adaptive headroom voltage control (AHVC) for high-efficiency DC/DC integration in TV and monitor backlight units.
For engineers reviewing the TLC69664YBHR datasheet, TLC69664YBHR pinout, TLC69664YBHR application, or TLC69664YBHR equivalent, key selection criteria include its 60mA/50V sink capability, daisy-chain interface up to 20MHz, programmable black insertion and VRR support, UART/interrupt or two-wire readback diagnostics, and DSBGA-24 package with 1.58mm × 2.43mm footprint for ultra-dense local dimming zone layouts.
Technical Context
The TLC69664YBHR implements time-multiplexed local dimming using 16 independent constant-current sinks, each programmable via internal SRAM for brightness storage and controlled through a high-speed two-wire daisy-chain interface supporting up to 1024 devices. Its AHVC scheme dynamically adjusts the DC/DC feedback reference using only the FB pin of the last device in the chain.
Diagnostics include per-zone LED open/short detection and thermal shutdown reporting via either UART/INT or CLK_O/SOUT outputs. The device supports hybrid PWM/brightness register dimming with up to 15-bit resolution and features integrated 4-phase-shifting to reduce EMI without external components.
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 with 50V compliance voltage - enables high-brightness, high-Vf LED strings |
| Current accuracy | ±2% device-to-device and channel-to-channel error - ensures uniform luminance across zones |
| Brightness resolution | Up to 15-bit - supports fine-grained dimming steps for smooth grayscale transitions |
| Data rate | Up to 20MHz daisy-chain interface - allows rapid update of >32,000 zones in large displays |
| Power consumption | ≤3.5mA in normal mode; ≤200μA in standby - minimizes system-level power overhead |
| Operating voltage | 3V to 5.5V VCC - compatible with standard logic supply rails |
Pinout & Package
Package: DSBGA-24 (YBH), 1.58mm × 2.43mm body size, 0.4mm pitch, 0.4mm max height, ball grid array with exposed thermal pad (ball 25).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | 3V–5.5V logic and bias rail for internal circuitry |
| GND | Ground reference | Common return path for all analog/digital functions and current sinks |
| CLK_I | Serial clock input | Master-synchronized timing signal for 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 daisy chain; also used for diagnostic readback |
| CLK_O | Serial clock output | Passes synchronized clock to next device; used with SOUT for two-wire diagnostics |
| FB | Feedback input | Connects only on last device in chain to regulate DC/DC output voltage via AHVC |
| OUT0–OUT15 | Constant-current outputs | 16 high-side referenced current sinks driving LED cathodes to GND |
| INT | Interrupt output | Active-low open-drain flag signaling LOD, LSD, or TSD events |
| UART_TX/RX | Diagnostic serial interface | Configurable UART pins for register-based fault reporting and configuration |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces DC/DC output voltage to minimum required for all active LED strings, cutting power loss by up to 30% vs fixed-headroom designs |
| Programmable black insertion | Inserts precise black frames between video frames to eliminate motion blur without requiring panel-level changes |
| Variable refresh rate (VRR) support | Maintains flicker-free operation during dynamic frame rate switching by synchronizing dimming updates to display controller timing |
| Per-zone LED open/short detection | Identifies failed LEDs or wiring faults in real time, enabling graceful degradation and system-level fault logging |
| 4-phase-shifting EMI reduction | Staggers switching edges across multiple devices to lower peak radiated emissions without added filtering components |
Applications
| TV Backlight Systems | Professional Monitor Backlights |
|---|---|
Use Scenario: High-end 4K/8K LCD TVs with >1000 local dimming zones for HDR contrast enhancement. IC Role / Device Role / Timing Role: Primary local dimming controller managing 16 LED zones per IC, daisy-chained across full display edge. Use Value: Enables 1,000,000:1 dynamic contrast ratio via precise per-zone current control and sub-frame black insertion. | Use Scenario: Color-critical medical and broadcast monitors requiring uniform luminance and zero flicker. IC Role / Device Role / Timing Role: Zone driver synchronized to display controller's VSYNC and pixel clock for artifact-free dimming updates. Use Value: Eliminates motion blur and flicker during fast UI navigation or video playback using VRR-aligned dimming. |
| Notebook Display Backlights | Tablet & Portable Display Modules |
Use Scenario: Slim-profile ultrabooks with edge-lit local dimming for battery-efficient HDR viewing. IC Role / Device Role / Timing Role: Compact DSBGA-24 implementation driving dual-edge LED strings with minimal PCB area. Use Value: Achieves >700 nits peak brightness and >10,000:1 contrast within 3mm bezel height constraint. | Use Scenario: 10–13" tablets using direct-lit local dimming for improved outdoor visibility and battery life. IC Role / Device Role / Timing Role: Low-quiescent-current driver (≤200μA standby) enabling instant-on dimming after sleep mode. Use Value: Extends battery runtime by 18% vs non-AHVC drivers through optimized DC/DC headroom management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69664RTWR | Same electrical specs but WQFN-24 (4mm × 4mm) package with exposed thermal pad; higher thermal mass and easier rework | Preferred for prototyping, thermal-limited designs, or where DSBGA assembly infrastructure is unavailable | Select when board-level thermal dissipation >1.2W or manual rework is required |
| TLC69662YBHR | Same DSBGA-24 package but rated for 60mA/20V - lower compliance voltage limits string count and Vf headroom | Suitable for low-Vf LED arrays (e.g., red/green/blue direct-lit modules) where 50V is unnecessary | Select when total LED forward voltage per string <18V and cost optimization is prioritized over headroom margin |
Compared with TLC69664RTWR, the TLC69664YBHR saves >60% PCB area and enables finer zone density; compared with TLC69662YBHR, it delivers 2.5× higher compliance voltage for longer LED strings and wider color gamut support.
Availability
TLC69664YBHR is available at Aetrix Electronics and suitable for TV backlight systems, professional monitor designs, and portable display modules requiring stable component supply, high-reliability local dimming performance, and compact DSBGA packaging for space-constrained edge-lit architectures.
Supply support for TLC69664YBHR 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, with leadership in power management, signal chain, and high-reliability interface technologies.
The TLC696x2/4/8 product line was engineered specifically for high-channel-count LCD local dimming backlight systems, balancing precision current regulation, daisy-chain scalability, and system-level efficiency via adaptive voltage control.
FAQ
What is the maximum LED string voltage supported by the TLC69664YBHR?
The TLC69664YBHR supports up to 50V compliance voltage per output channel, allowing it to drive longer LED strings or higher-forward-voltage LEDs (e.g., blue/white phosphor combinations) without external boost stages. This specification is confirmed in the device family datasheet Section 1 (Features) and applies directly to the TLC69664YBHR variant.
Does the TLC69664YBHR require an external microcontroller to configure its dimming parameters?
No - the TLC69664YBHR contains internal SRAM for brightness storage and supports standalone operation once programmed. However, a host controller (e.g., display timing controller or SoC) is required for initial register writes and diagnostic polling. The TLC69664YBHR retains settings across power cycles and executes dimming autonomously thereafter.
How does the adaptive headroom voltage control (AHVC) function in the TLC69664YBHR?
AHVC in the TLC69664YBHR dynamically adjusts the DC/DC converter's output voltage based on the highest forward voltage among all active LED strings in the daisy chain. Only the FB pin of the final TLC69664YBHR in the chain connects to the DC/DC feedback node, minimizing routing complexity while ensuring optimal efficiency across varying dimming patterns.
Can the TLC69664YBHR detect individual LED failures in a multi-LED string per channel?
Yes - the TLC69664YBHR provides per-channel LED open detection (LOD) and LED short detection (LSD), identifying open-circuit or short-circuit conditions on any of its 16 outputs. These faults trigger the INT pin and can be read back via UART or two-wire interface, enabling real-time system-level failure isolation without additional sensing circuitry.
Is the TLC69664YBHR pin-compatible with other members of the TLC696x2/4/8 family?
Yes - all TLC696x2/4/8 variants, including TLC69664YBHR, share identical pinouts across both DSBGA-24 (YBH) and WQFN-24 (RTW) packages. This allows direct substitution between current/voltage variants (e.g., TLC69662YBHR ↔ TLC69664YBHR) without PCB layout changes, provided thermal and voltage margin requirements are verified.
TLC69664YBHR 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)
TLC69664YBHR FAQ
1.How can I place an order for TLC69664YBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69664YBHR 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 TLC69664YBHR reliable?
The price and inventory of TLC69664YBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69664YBHR is usually 5 days.
3.What payment methods are accepted for TLC69664YBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69664YBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69664YBHR?
TLC69664YBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69664YBHR 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 TLC69664YBHR?
For technical support, including TLC69664YBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69664YBHR requirements.
6.How does Aetrix verify that TLC69664YBHR is sourced from the original manufacturer or authorized distributors?
All TLC69664YBHR 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 TLC69664YBHR meets industry standards.
7.What is the process for return or replacement of TLC69664YBHR?
All TLC69664YBHR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69664YBHR, 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 TLC69664YBHR part is unused and in its original packaging.
Return procedure for TLC69664YBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69664YBHR Tags
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