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Texas Instruments TLC69618RTWR
- Part No.:
- TLC69618RTWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69618RTWR.pdf
- Description:
- 128 MINI-LED MATRIX LOCAL DIMMIN
- Quantity:
- Payment:
- Shipping:
Inventory:4,859
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Product details
Overview
TLC69618RTWR from Texas Instruments is a 16-channel, 8-time-multiplexing LED backlight driver for LCD local dimming, delivering 60mA constant current per channel at up to 50V compliance voltage, ±2% channel-to-channel current matching, and 15-bit brightness resolution in hybrid PWM control mode.
For engineers reviewing the TLC69618RTWR datasheet, TLC69618RTWR pinout, TLC69618RTWR application, or TLC69618RTWR equivalent, key selection criteria include its adaptive headroom voltage control (AHVC) for DC/DC optimization, UART/interrupt and two-wire SOUT/CLK_O diagnostic reporting, and support for variable refresh rate (VRR) without flicker in high-end display systems.
Technical Context
The TLC69618RTWR implements time-multiplexed local dimming with 8× scan ratio, integrating 16 constant-current sinks and on-chip SRAM for per-zone brightness storage. It operates in daisy-chain topology supporting >32,000 zones via up to 1024 devices.
Its adaptive headroom voltage control (AHVC) directly regulates external DC/DC converters using only the FB pin of the last device in chain, minimizing layout complexity. Diagnostics include per-zone LED open/short detection and thermal shutdown, reported via programmable UART/INT or CLK_O/SOUT interface.
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 Matching | ±2% channel-to-channel error (typ.) - ensures uniform luminance across dimming zones |
| Brightness Resolution | Up to 15-bit - enables fine-grained contrast control for HDR displays |
| Daisy-Chain Data Rate | Up to 20MHz - enables fast firmware updates and real-time dimming updates across large arrays |
| Supply Voltage Range | 3V to 5.5V - compatible with standard logic rails and low-power system designs |
| Power Consumption | ≤3.5mA in normal mode; ≤200μA in standby - reduces system-level power overhead |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm, 0.5mm pitch, exposed thermal pad (Pin 25). RoHS-compliant, NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main logic and bias rail; decoupling required near pin |
| GND | Ground reference | Common return for analog/digital circuits and thermal pad connection |
| CLK_I / CLK_O | Clock input/output | Enables synchronous daisy-chain timing; CLK_O drives next device's CLK_I |
| SIN / SOUT | Serial data in/out | Two-wire daisy-chain interface; SOUT transmits readback or status data |
| FB | Feedback input | Only last device's FB connects to DC/DC converter for AHVC - simplifies multi-device layout |
| INT | Interrupt output | Active-low open-drain flag for LOD/LSD/TSD events - enables interrupt-driven diagnostics |
| OUT0–OUT15 | Constant-current outputs | 16 high-side current sinks; each drives one LED string cathode to GND |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Headroom Voltage Control (AHVC) | Reduces power loss by dynamically adjusting DC/DC output to minimum required VLED + margin across all active zones |
| Programmable Black Insertion | Inserts controlled black frames between refresh cycles to improve perceived contrast and motion clarity |
| Variable Refresh Rate (VRR) Support | Maintains stable dimming and eliminates flicker during dynamic frame-rate changes (e.g., gaming, video playback) |
| Per-Zone LED Open/Short Detection | Identifies failed LEDs or shorts in real time without external sensing circuitry - enables fail-safe display operation |
| 4-Phase Shifting EMI Reduction | Staggered switching of output banks lowers peak current harmonics and eases EMI filter design |
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 16-channel LED sink driver operating in 8× time-multiplexed mode; coordinated via daisy-chained serial interface. Use Value: Enables deep black levels and >1,000,000:1 contrast ratio through precise per-zone current control and VRR-compatible dimming updates. | Use Scenario: Professional-grade monitors requiring flicker-free, HDR-capable backlighting with adaptive brightness. IC Role / Device Role / Timing Role: Constant-current driver managing multiple LED strings behind IPS/VA panels; synchronized via CLK_I/CLK_O chain. Use Value: Delivers 15-bit dimming resolution and black insertion to eliminate motion blur while maintaining color fidelity under dynamic content. |
| Notebook Display Backlight | Tablet HDR Backlight System |
Use Scenario: Thin-bezel ultrabooks with edge-lit or mini-LED backlights requiring low-power, high-precision dimming. IC Role / Device Role / Timing Role: Local dimming controller interfacing with host GPU or display engine via SPI-compatible daisy chain. Use Value: Achieves <200μA standby current and AHVC-driven efficiency - extends battery life without sacrificing contrast performance. | Use Scenario: Premium tablets using mini-LED arrays for HDR video playback and creative applications. IC Role / Device Role / Timing Role: Zone driver supporting hybrid PWM/global MC control; diagnostics routed via UART for system-level fault logging. Use Value: Combines ±2% current matching and per-zone short/open detection to ensure consistent brightness and field-replaceable reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69614RTWR | Same 16-channel, 8× multiplex architecture but rated for 60mA/20V - lower compliance voltage | Suitable for low-Vf LED strings (e.g., red/green phosphor-based); not viable for high-Vf blue/white mini-LEDs | Select when panel Vf max ≤ 20V and cost-sensitive BOM allows trade-off in voltage headroom |
| TLC69668RTWR | 60mA/50V rating like TLC69618RTWR but supports 2× time-multiplexing - higher per-frame update rate, lower zone count per device | Better suited for fast-refresh applications (e.g., VR/AR displays) where latency matters more than zone density | Choose when system prioritizes sub-1ms brightness update latency over maximum local dimming zone count per chain |
Compared with TLC69614RTWR and TLC69668RTWR, the TLC69618RTWR uniquely balances 50V compliance, 8× multiplexing, and diagnostic flexibility - making it optimal for mainstream high-zone-count TV and monitor designs where voltage margin and zone density are both critical.
Availability
TLC69618RTWR is available at Aetrix Electronics and suitable for TV backlight systems, professional monitor designs, and notebook HDR display modules requiring stable component supply, long-term manufacturability, and automotive-qualified variants (TLC69618-Q1) for extended temperature support.
Supply support for TLC69618RTWR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, efficiency, and system-level integration.
The TLC696x family is engineered specifically for LCD local dimming backlight systems - optimizing power efficiency via AHVC, minimizing EMI through phase-shifting, and enabling high-fidelity HDR imaging through precise 15-bit dimming and VRR compatibility.
FAQ
What is the maximum LED string voltage supported by the TLC69618RTWR?
The TLC69618RTWR supports up to 50V compliance voltage per output channel, enabling direct drive of multi-LED white/blue strings common in mini-LED backlight designs. This 50V rating distinguishes it from lower-voltage variants like TLC69614RTWR (20V) and ensures compatibility with high-forward-voltage LED configurations without external level-shifting circuitry. The TLC69618RTWR maintains 60mA constant current across this full voltage range.
How does the adaptive headroom voltage control (AHVC) function in the TLC69618RTWR?
The TLC69618RTWR implements AHVC by monitoring the highest forward voltage among active LED strings and feeding back only the final device's FB pin to the external DC/DC converter. This closed-loop control minimizes excess headroom voltage, reducing power dissipation and heat generation. Unlike fixed-headroom designs, AHVC dynamically adapts per frame - a feature confirmed in the TLC69618RTWR datasheet Section 3 and functional block diagram.
Does the TLC69618RTWR support diagnostic reporting, and how is it implemented?
Yes, the TLC69618RTWR provides three hardware-diagnosed faults: LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD). Reporting is configurable via register settings to use either UART + INT pin or two-wire CLK_O/SOUT signals. This dual-path capability allows system designers to choose between interrupt-driven event handling or polled status reads - both fully supported and documented for the TLC69618RTWR in the "Diagnostics" section of its datasheet.
What package and thermal characteristics apply to the TLC69618RTWR?
The TLC69618RTWR uses the WQFN-24 (RTW) package: 4mm × 4mm body, 0.5mm pitch, 0.8mm max height, with an exposed thermal pad (Pin 25). Its MSL Level-1 rating permits unlimited floor life at ≤30°C/60% RH. Thermal resistance (θJA) is 42°C/W typical on 2-layer JEDEC board - verified in TI's RTW package characterization report for TLC69618RTWR. The exposed pad must be soldered to PCB ground plane for optimal thermal performance.
Can the TLC69618RTWR be used in automotive applications?
The standard TLC69618RTWR is qualified for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 certified. However, Texas Instruments offers the pin- and function-compatible TLC69618-Q1 variant, which meets AEC-Q100 Grade 2 (–40°C to +105°C) and includes enhanced reliability testing for automotive display systems. For automotive designs, specify TLC69618-Q1 - the TLC69618RTWR itself is intended for consumer and industrial displays only.
TLC69618RTWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Constant Current
- Internal Switch(s):
- -
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 20V
- 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-WQFN (4x4)
TLC69618RTWR FAQ
1.How can I place an order for TLC69618RTWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69618RTWR 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 TLC69618RTWR reliable?
The price and inventory of TLC69618RTWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69618RTWR is usually 5 days.
3.What payment methods are accepted for TLC69618RTWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69618RTWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69618RTWR?
TLC69618RTWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69618RTWR 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 TLC69618RTWR?
For technical support, including TLC69618RTWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69618RTWR requirements.
6.How does Aetrix verify that TLC69618RTWR is sourced from the original manufacturer or authorized distributors?
All TLC69618RTWR 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 TLC69618RTWR meets industry standards.
7.What is the process for return or replacement of TLC69618RTWR?
All TLC69618RTWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69618RTWR, 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 TLC69618RTWR part is unused and in its original packaging.
Return procedure for TLC69618RTWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC69618RTWR Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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