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Texas Instruments TLC69650RTWR
- Part No.:
- TLC69650RTWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
TLC69650RTWR.pdf
- Description:
- 8-SCAN MOSFET CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLC69650RTWR from Texas Instruments is a 24-pin WQFN scan MOSFET controller for LCD local dimming backlight systems, delivering 30mA drive current at up to 50V sustaining voltage, 8-bit global/individual channel current control, and 20MHz daisy-chain interface compatibility with 1.8V/3.3V I/O levels.
For engineers reviewing the TLC69650RTWR datasheet, TLC69650RTWR pinout, TLC69650RTWR application, or TLC69650RTWR equivalent, key selection criteria include its 50V P-MOSFET driving capability, adaptive headroom voltage control for DC/DC optimization, ghost-cancellation function, and UART/INT or SOUT/CLK_O diagnostic readback options.
Technical Context
The TLC69650RTWR implements a 16-channel constant-current sink architecture synchronized with external TLC696x2/4/8 current-sink drivers to enable 2×/4×/8× time-multiplexed scan control of LED backlight arrays. It integrates adaptive headroom voltage control that uses only the FB pin from the last device in the serial chain to regulate DC/DC output.
Diagnostic functionality includes three dedicated error flags-LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD)-with two programmable readback paths: UART + INT pin or differential CLK_O/SOUT outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3V to 5.5V - supports direct connection to standard logic supply rails without LDO overhead |
| Max Driving Current / Sustaining Voltage | 30mA / 50V - enables direct control of high-voltage P-MOSFETs in large-area local dimming zones |
| Daisy-Chain Data Rate | Up to 20MHz - allows rapid brightness updates across multi-device chains for flicker-free VRR operation |
| Current Control Resolution | 8-bit global MC + 8-bit per-channel CC - provides fine-grained dimming uniformity and zone-specific calibration |
| I/O Voltage Compatibility | 1.8V / 3.3V - interoperable with low-voltage FPGAs, microcontrollers, and display timing controllers |
| Thermal Protection | Integrated thermal shutdown detection - halts operation above safe junction temperature to prevent damage |
| Diagnostic Readback Options | UART + INT pin OR CLK_O + SOUT - selectable interface mode simplifies system-level fault logging integration |
Pinout & Package
Package: WQFN-24 (RTW), 4mm × 4mm body, 0.8mm max height, exposed thermal pad (Pin 25), RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | 3V–5.5V main supply for internal logic and interface drivers |
| GND | Ground reference | Common return path for power, logic, and analog sections |
| CLK_I | Input clock | Accepts master clock signal for synchronous daisy-chain data transfer |
| SIN | Serial data input | Receives configuration and brightness data from upstream controller or host |
| SOUT | Serial data output | Drives downstream device in daisy chain; also used for diagnostic readback (dual-mode) |
| CLK_O | Output clock | Provides synchronized clock to next device; paired with SOUT for 2-wire diagnostics |
| FB | Feedback input | Connects only from last device in chain to DC/DC converter for adaptive headroom control |
| INT | Interrupt output | Active-low open-drain flag signaling LOD/LSD/TSD events when UART mode selected |
| G0–Gn | Gate drive outputs | 16 dedicated gate-control signals for external P-MOSFETs (nominally G0–G7 per datasheet schematic) |
| D0–Dn | Current sink outputs | 16 constant-current sinks tied to TLC696x2/4/8 drivers for LED string control |
| EXPOSED PAD | Thermal ground | Must be soldered to PCB thermal plane for reliable 85°C ambient operation |
Key Features
| Feature | Design Value |
|---|---|
| Ghost-cancellation circuitry | Eliminates upside ghosting artifacts in time-multiplexed local dimming by synchronizing gate and current sink timing |
| Adaptive headroom voltage control | Reduces power loss in DC/DC stage by dynamically adjusting output voltage to match minimum required LED forward voltage |
| Programmable black insertion | Inserts precise black frames between refresh cycles to enhance contrast ratio without introducing motion blur |
| Variable refresh rate (VRR) support | Maintains stable LED current during dynamic frame-rate changes to prevent visible flicker or brightness modulation |
| Minimum brightness update latency | Enables sub-frame brightness adjustments critical for HDR tone mapping and real-time local dimming response |
Applications
| TV Local Dimming | Monitor Backlight Control |
|---|---|
Use Scenario: High-end 4K/8K LCD TVs requiring >1000-zone local dimming for HDR10+ and Dolby Vision compliance. IC Role / Device Role / Timing Role: Scan controller coordinating gate timing and current sink sequencing across cascaded TLC696x2/4/8 drivers. Use Value: Enables 50V sustain capability to drive wide-Vf LED strings while maintaining <10µs brightness update latency for smooth scene transitions. | Use Scenario: Professional-grade monitors with factory-calibrated grayscale and wide color gamut (DCI-P3). IC Role / Device Role / Timing Role: Centralized dimming sequencer managing 2×/4× multiplexing to reduce channel count and PCB layer count. Use Value: Ghost-cancellation ensures accurate luminance reproduction at edge zones; VRR support eliminates flicker during GPU-driven variable frame rates. |
| Notebook Display Dimming | Tablet Backlight System |
Use Scenario: Thin-bezel ultrabooks with slim-profile edge-lit backlights and battery-life-sensitive power budgets. IC Role / Device Role / Timing Role: Low-power scan controller interfacing with 1.8V SoC GPIOs via daisy-chain, minimizing interconnect count. Use Value: 30mA/50V drive capability allows fewer parallel LED strings; adaptive headroom cuts DC/DC losses by up to 18% versus fixed-output designs. | Use Scenario: 10–12 inch tablets requiring uniform dimming across curved or asymmetric bezel geometries. IC Role / Device Role / Timing Role: Diagnostic-enabled controller using UART/INT readback to report LOD/LSD faults during automated production test. Use Value: Dual diagnostic modes simplify test fixture design; black insertion improves perceived contrast in ambient-lit handheld use cases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar scan MOSFET controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC69660RTWR | 60mA / 50V drive capability vs. TLC69650RTWR's 30mA - higher current for larger MOSFET gate capacitance or faster switching | Targets higher-power backlight modules with >1A total gate charge; not drop-in due to different thermal and layout requirements | Select TLC69660RTWR only when gate drive strength exceeds 30mA requirement; verify thermal margin with increased Idrive |
| TLC69610RTWR | 60mA / 20V drive capability - lower sustaining voltage but higher current than TLC69650RTWR | Suitable for low-Vf LED stacks or compact displays where 50V headroom is unnecessary | Choose TLC69610RTWR for cost-sensitive designs with ≤20V LED string requirements and no need for 50V robustness |
Compared with TLC69650RTWR, TLC69660RTWR offers higher gate drive current for demanding MOSFETs but requires greater PCB copper area for thermal management, while TLC69610RTWR reduces voltage rating to optimize cost and size in low-headroom applications - all share identical pinout, register map, and daisy-chain protocol.
Availability
TLC69650RTWR is available at Aetrix Electronics and suitable for TV local dimming, monitor backlight control, and notebook display systems requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant WQFN packaging.
Supply support for TLC69650RTWR 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 over 90 years of innovation in power management and precision analog ICs.
The TLC696x0 family was designed specifically for high-fidelity LCD local dimming backlight control, emphasizing timing accuracy, diagnostic reliability, and system-level power optimization in consumer and professional displays.
FAQ
What is the maximum sustaining voltage supported by the TLC69650RTWR?
The TLC69650RTWR supports a maximum sustaining voltage of 50V, enabling direct control of high-voltage P-MOSFETs used in large-area LCD backlight zones. This specification is confirmed in the official TI datasheet SNVSCJ8 and applies specifically to the TLC69650RTWR variant-not the TLC69600RTWR (20V) or TLC69610RTWR (20V). The 50V rating ensures robust operation under transient conditions and wide LED forward voltage variation across temperature and aging.
Does the TLC69650RTWR require external current-setting resistors?
No, the TLC69650RTWR does not require external current-setting resistors. It integrates both global 8-bit maximum current (MC) and individual 8-bit channel current (CC) DACs to digitally configure LED sink current per channel. These settings are programmed via the daisy-chain interface, eliminating component count, board space, and tolerance-related calibration drift associated with analog resistor networks - a key advantage over legacy analog dimming controllers.
How does the adaptive headroom voltage control work in the TLC69650RTWR?
The TLC69650RTWR implements adaptive headroom voltage control by monitoring the feedback (FB) pin only from the last device in the daisy chain, then dynamically adjusting the DC/DC converter output to match the minimum required forward voltage across all active LED strings. This reduces power dissipation in the DC/DC stage and improves overall system efficiency - especially beneficial in high-channel-count local dimming systems where headroom margins otherwise dominate losses.
Can the TLC69650RTWR be used without the TLC696x2/4/8 current-sink drivers?
No, the TLC69650RTWR is not a standalone LED driver and must be used with compatible TLC696x2/4/8 current-sink drivers. Its 16 D0–Dn outputs connect directly to the sink inputs of those drivers, while its G0–Gn pins control external P-MOSFETs for scan switching. The TLC69650RTWR provides timing, diagnostics, and interface logic - but relies entirely on the TLC696x2/4/8 family for actual constant-current regulation and LED string sinking.
What diagnostic readback interfaces does the TLC69650RTWR support?
The TLC69650RTWR supports two mutually exclusive diagnostic readback modes: (1) UART communication plus interrupt pin (INT) assertion for LOD/LSD/TSD events, or (2) two-wire differential output using CLK_O and SOUT pins. The mode is selected via configuration register at power-up. Both options deliver the same error flag status but differ in physical layer implementation - UART suits host MCU UART peripherals, while CLK_O/SOUT enables simpler GPIO-based polling in resource-constrained systems.
TLC69650RTWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TLC696x0
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- -
- 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:
- No
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
TLC69650RTWR FAQ
1.How can I place an order for TLC69650RTWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC69650RTWR 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 TLC69650RTWR reliable?
The price and inventory of TLC69650RTWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC69650RTWR is usually 5 days.
3.What payment methods are accepted for TLC69650RTWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC69650RTWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC69650RTWR?
TLC69650RTWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC69650RTWR 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 TLC69650RTWR?
For technical support, including TLC69650RTWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC69650RTWR requirements.
6.How does Aetrix verify that TLC69650RTWR is sourced from the original manufacturer or authorized distributors?
All TLC69650RTWR 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 TLC69650RTWR meets industry standards.
7.What is the process for return or replacement of TLC69650RTWR?
All TLC69650RTWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC69650RTWR, 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 TLC69650RTWR part is unused and in its original packaging.
Return procedure for TLC69650RTWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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