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Texas Instruments TLC69601RTWR
- Part No.:
- TLC69601RTWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69601RTWR.pdf
- Description:
- LOCAL DIMMING MINI-LED BACKLIGHT
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
TLC69601RTWR from Texas Instruments is a 16-channel constant-current LED sink driver optimized for LCD local dimming backlight systems, delivering 30mA per channel at up to 20V output compliance, ±2% device-to-device and channel-to-channel current matching (typ.), and 15-bit brightness resolution in TV, monitor, and notebook displays.
For engineers reviewing the TLC69601RTWR datasheet, TLC69601RTWR pinout, TLC69601RTWR application, or TLC69601RTWR equivalent, key selection criteria include adaptive headroom voltage control (AHVC), daisy-chainable 20MHz two-wire interface, UART/INT and SOUT/CLK_O diagnostic readback options, and thermal/LED open/short fault reporting.
Technical Context
The TLC69601RTWR 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 SRAM-based brightness storage enables independent per-channel dimming control.
Adaptive headroom voltage control (AHVC) directly regulates external DC/DC converters via the FB pin of the last device in the chain, minimizing power loss. Diagnostics include LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD), reported via either UART/INT or SOUT/CLK_O outputs.
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 / 20V - sets maximum per-channel LED drive capability for mid-voltage backlight strings. |
| Current Matching | ±2% (typ.) device-to-device and channel-to-channel - ensures uniform luminance across dimming zones without per-channel calibration. |
| Brightness Resolution | Up to 15-bit - enables smooth grayscale transitions and eliminates visible contouring in high-dynamic-range displays. |
| Interface Speed | Up to 20MHz daisy-chain data rate - allows full 16-channel update within <1µs, critical for VRR and black insertion timing. |
| Power Consumption | ≤200μA standby, ≤3.5mA normal mode - reduces system-level quiescent power in always-on display subsystems. |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial display environments including edge-lit TVs and embedded monitors. |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm body, 0.5mm pitch, exposed thermal pad (Pin 25).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | Primary power rail for internal logic and gate drivers; decoupling required near package. |
| GND | Ground reference | Common return for analog/digital circuits and current sinks; connects to exposed thermal pad. |
| CLK_I | Input clock | Accepts master clock for synchronous daisy-chain operation; compatible with 1.8V/3.3V logic levels. |
| SIN | Serial data input | Receives configuration and brightness data from upstream device or controller. |
| SOUT | Serial data output | Drives downstream device in daisy chain; supports diagnostic readback when configured. |
| CLK_O | Output clock | Propagates synchronized clock to next device; used with SOUT for two-wire readback mode. |
| FB | Feedback input | Connects only to last device's FB pin to regulate DC/DC converter headroom voltage dynamically. |
| OUT0–OUT15 | Constant-current sinks | 16 dedicated high-side referenced current outputs; each drives one LED string cathode. |
| INT | Interrupt output | Active-low open-drain flag signaling LOD, LSD, or TSD events to host controller. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces DC/DC output voltage to minimum required for all active channels, cutting system power loss by up to 30% vs fixed-headroom designs. |
| Programmable Black Insertion | Inserts precise dark frames between video frames to eliminate motion blur without requiring panel-level hardware changes. |
| Variable Refresh Rate (VRR) Support | Maintains flicker-free dimming during dynamic frame-rate switching (e.g., gaming or video playback) via synchronized PWM timing. |
| Dual Diagnostic Readback Modes | UART/INT or SOUT/CLK_O selection allows flexible integration with existing host interfaces-no additional UART peripheral required if using SOUT/CLK_O. |
| EMI Suppression Schemes | Four programmable phase-shifting options reduce peak radiated emissions by spreading energy across frequency spectrum. |
Applications
| TV Local Dimming | Monitor Backlight Control |
|---|---|
Use Scenario: High-end 4K/8K LCD TVs implementing zone-based dimming for contrast enhancement and HDR rendering. IC Role / Device Role / Timing Role: Primary 16-channel constant-current sink managing individual LED string currents per local dimming zone. Use Value: Enables >1000:1 local contrast ratio with minimal power overhead via AHVC and 15-bit dimming resolution. |
Use Scenario: Professional-grade monitors requiring flicker-free, low-latency backlight response for CAD and video editing. IC Role / Device Role / Timing Role: Local dimming controller synchronizing brightness updates with GPU frame delivery for VRR compatibility. Use Value: Eliminates motion artifacts through sub-millisecond brightness update latency and black insertion timing control. |
| Notebook Display Backlight | Tablet Edge-Lit Backlight |
Use Scenario: Thin-profile notebooks where thermal and power efficiency constrain backlight driver selection. IC Role / Device Role / Timing Role: Compact 16-channel LED driver with integrated diagnostics reducing need for external fault monitoring circuitry. Use Value: Low 200μA standby current extends battery life; WQFN-24 package fits tight board space constraints. |
Use Scenario: Portable tablets requiring robust fault detection in compact, thermally constrained enclosures. IC Role / Device Role / Timing Role: Fault-aware LED driver performing real-time LED open/short and thermal shutdown detection per zone. Use Value: Prevents localized overheating or brightness failure via immediate INT assertion and UART/SOUT readback of fault source. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED local dimming applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69611RTWR | 60mA per channel (vs. 30mA), same 20V compliance and pinout | Supports higher-brightness LED strings or longer series chains without redesign | Select when driving >30mA LED loads; identical layout and firmware interface. |
| TLC69651RTWR | 30mA per channel with 50V output compliance (vs. 20V) | Enables longer LED strings (e.g., 12–15 LEDs) in high-voltage edge-lit configurations | Choose for high-string-count backlights where 20V compliance is insufficient. |
Compared with TLC69601RTWR, TLC69611RTWR delivers double the per-channel current for brighter zones without changing voltage headroom, while TLC69651RTWR maintains 30mA current but doubles output compliance to support longer LED strings-both retain identical daisy-chain protocol, diagnostics, and package footprint.
Availability
TLC69601RTWR is available at Aetrix Electronics and suitable for TV backlight systems, professional monitor designs, and notebook display modules requiring stable component supply, long-term lifecycle support, and automotive-qualified alternatives (TLC69601-Q1) for future scalability.
Supply support for TLC69601RTWR 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 processing technologies, with over 90 years of innovation in power management and precision analog ICs.
The TLC696x1 product line was developed specifically for high-fidelity LCD local dimming in premium displays, integrating adaptive power control, ultra-low latency updates, and comprehensive fault diagnostics into a single-chip solution.
FAQ
What is the maximum number of TLC69601RTWR devices that can be daisy-chained?
The TLC69601RTWR supports daisy-chaining up to 1024 devices in a single two-wire serial chain, enabling control of up to 16,000 local dimming zones. This scalability is achieved through deterministic timing and register-based addressing, with no additional controller overhead beyond the initial configuration broadcast. The TLC69601RTWR itself requires no unique address programming-zone mapping is handled entirely by position in the chain and host software.
Does the TLC69601RTWR require an external microcontroller to configure its registers?
Yes, the TLC69601RTWR requires an external host controller (e.g., MCU or SoC) to initialize configuration registers, load brightness values into SRAM, and manage diagnostic reporting. It does not contain embedded firmware or boot ROM. All communication occurs via the daisy-chainable two-wire interface (CLK_I/SIN), and the host must implement the command protocol defined in the SLVSHB7 datasheet to write to or read from the TLC69601RTWR's internal registers.
How does Adaptive Headroom Voltage Control (AHVC) function in the TLC69601RTWR?
AHVC in the TLC69601RTWR dynamically adjusts the DC/DC converter's output voltage by monitoring the highest forward voltage among all active OUTx channels and adding minimal margin. Only the FB pin of the final device in the daisy chain connects to the DC/DC feedback node-intermediate devices ignore FB. This centralized regulation minimizes power dissipation across all TLC69601RTWR devices while maintaining sufficient headroom for worst-case LED string voltage variation.
Can the TLC69601RTWR operate in standalone mode without diagnostic reporting?
Yes, the TLC69601RTWR operates fully functional without diagnostic reporting enabled. LED open/short and thermal shutdown detection remain active internally, but fault flags (LOD/LSD/TSD) default to disabling the INT pin and suppressing SOUT/CLK_O readback unless explicitly enabled via configuration registers. Standalone operation requires only VCC, GND, CLK_I, SIN, and OUTx connections-no UART or interrupt routing is mandatory for basic dimming functionality.
What is the purpose of the exposed thermal pad (Pin 25) on the TLC69601RTWR WQFN package?
The exposed thermal pad (Pin 25) on the TLC69601RTWR WQFN package serves as the primary thermal conduction path from the die to the PCB, significantly lowering junction-to-board thermal resistance. It must be soldered to a solid copper pour connected to system ground for optimal thermal performance and reliability. TI specifies ≥78% solder paste coverage under the pad using a 0.125mm stencil; omitting this connection risks exceeding the 85°C max operating temperature during sustained 30mA per-channel operation.
TLC69601RTWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TLC696x1
- Package/Case:
- 24-WFQFN Exposed Pad
- 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-WQFN (4x4)
TLC69601RTWR FAQ
1.How can I place an order for TLC69601RTWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69601RTWR 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 TLC69601RTWR reliable?
The price and inventory of TLC69601RTWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69601RTWR is usually 5 days.
3.What payment methods are accepted for TLC69601RTWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69601RTWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69601RTWR?
TLC69601RTWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69601RTWR 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 TLC69601RTWR?
For technical support, including TLC69601RTWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69601RTWR requirements.
6.How does Aetrix verify that TLC69601RTWR is sourced from the original manufacturer or authorized distributors?
All TLC69601RTWR 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 TLC69601RTWR meets industry standards.
7.What is the process for return or replacement of TLC69601RTWR?
All TLC69601RTWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69601RTWR, 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 TLC69601RTWR part is unused and in its original packaging.
Return procedure for TLC69601RTWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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