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Texas Instruments TLC59581RTQR
- Part No.:
- TLC59581RTQR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
TLC59581RTQR.pdf
- Description:
- IC LED DRIVER LINEAR 25MA 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,972
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Product details
Overview
TLC59581RTQR from Texas Instruments is a 48-channel, 16-bit enhanced PWM (ES-PWM) LED driver with constant-current sink outputs, pre-charge FET, LED open detection (LOD), and caterpillar cancellation. It supports 32-multiplexing, delivers up to 25 mA per channel at 5 VCC, and features ±3% max channel-to-channel current accuracy. It is designed for high-refresh, high-density RGB LED video displays requiring precise grayscale control.
For engineers reviewing the TLC59581RTQR datasheet, TLC59581RTQR pinout, TLC59581RTQR application, or TLC59581RTQR equivalent, key selection criteria include its 48-channel RGB grouping (16R/16G/16B), 65536-step grayscale resolution, 33 MHz grayscale clock support, thermal shutdown (170°C threshold), and VQFN-56 package with exposed thermal pad for thermal management.
Technical Context
The TLC59581RTQR implements an ES-PWM architecture with dual 48-kbit SRAM banks (A/B) enabling seamless frame buffering and high refresh rates in multiplexed LED panels. Its 3-bit global brightness control (BC) and 9-bit per-color group (R/G/B) color brightness control (CC) operate independently via serial interface, allowing dynamic per-group current scaling without interrupting display operation.
It integrates dedicated hardware for caterpillar artifact cancellation, LOD flag reporting via serial readback, and low-grayscale enhancement (LGSE) to improve visual fidelity below 10% duty cycle. The pre-charge FET minimizes ghosting during line switching in 32-multiplex configurations, while IREF resistor short protection (ISP) and thermal shutdown (TSD) ensure system-level reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 48 constant-current sink outputs: 16 red (OUTR0–15), 16 green (OUTG0–15), 16 blue (OUTB0–15) |
| Grayscale Resolution | 16-bit (65536 steps) per channel - enables smooth dimming and eliminates visible contouring in video content |
| Max Sink Current | 25 mA per channel at VCC = 5.5 V - sufficient to drive standard RGB SMD LEDs without external amplification |
| Current Accuracy | ±3% max channel-to-channel, ±2% max device-to-device - ensures uniform brightness across panels and between modules |
| Timing Performance | 25 MHz data shift clock (SCLK), 33 MHz grayscale clock (GCLK) - supports >3,800 Hz frame rate in 32-mux configuration |
| LOD & Protection | Programmable LED open detection (4 threshold levels), thermal shutdown (170°C), IREF short protection - reduces field failure risk |
| Supply Range | VCC = 3.0 V to 5.5 V; LED supply up to 10 V - compatible with common industrial and display power rails |
Pinout & Package
Package: VQFN-56 (RTQ), 8.00 mm × 8.00 mm body with exposed thermal pad soldered to PCB ground plane for thermal dissipation (RθJB = 5.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GCLK (Pin 29) | Grayscale clock input | Rising edge increments GS counter; determines PWM period and refresh timing - must be stable, low-jitter source |
| SIN (Pin 26) | Serial data input | LSB-first 48-bit shift register input; accepts GS, BC, CC, FC data - requires clean signal integrity for error-free loading |
| SCLK (Pin 28) | Serial clock input | Drives SIN data into shift register; 25 MHz max - defines data throughput and update latency |
| LAT (Pin 27) | Latch control input | Falling edge transfers shift register contents to GS memory or FC registers - synchronizes data commit to display timing |
| OUTR0–15 / OUTG0–15 / OUTB0–15 | Constant-current sink outputs | Grouped by color; each set of 16 drives one LED color channel - allows independent current tuning per color group |
| IREF (Pin 1) & IREFGND (Pin 56) | Reference current setting | External resistor between IREF and IREFGND sets full-scale current; IREFGND is dedicated analog ground - critical for accuracy |
| SOUT (Pin 42) | Serial data output | MSB of shift register; enables daisy-chaining multiple TLC59581RTQR devices - reduces controller GPIO count |
| Thermal Pad | Power ground / thermal path | Must be soldered to solid GND copper area - essential for maintaining TJ < 125°C under full load (25 mA × 48 ch) |
Key Features
| Feature | Design Value |
|---|---|
| ES-PWM with dual-SRAM banks | Enables real-time frame swapping without flicker - supports continuous 32-line multiplexing at >3.8 kHz refresh |
| Pre-charge FET + caterpillar cancellation | Eliminates ghosting artifacts during line transitions - critical for sharp text and fast-motion video on high-density panels |
| Low-grayscale enhancement (LGSE) | Improves visual linearity below 10% duty cycle - preserves detail in dark scenes without gamma distortion |
| LED open detection (LOD) with 4 thresholds | Reports open-circuit faults per channel via serial readback - enables predictive maintenance and panel diagnostics |
| Power-save mode (0.8 mA typical) | Reduces standby current when all outputs are off - extends uptime in battery-backed or energy-sensitive signage |
| Thermal shutdown & IREF short protection | Auto-shutdown at 170°C junction temp; detects IREF-to-GND shorts - prevents catastrophic failure in overvoltage or layout fault conditions |
Applications
| Indoor Full-Color LED Video Wall | Outdoor High-Brightness LED Signage |
|---|---|
|
Use Scenario: Large-format indoor video wall using 32-multiplexed SMD2121 RGB LED modules with 10 mm pitch. IC Role / Device Role / Timing Role: TLC59581RTQR drives 48 LEDs per IC (16R/16G/16B), manages GS timing via GCLK, and buffers frames in dual SRAM banks to sustain 3840 Hz refresh. Use Value: Eliminates visible scanning lines and motion blur through synchronized pre-charge and caterpillar cancellation - critical for live sports broadcast viewing. |
Use Scenario: Outdoor advertising sign with IP65-rated cabinet, operating at ambient temperatures from –40°C to 85°C. IC Role / Device Role / Timing Role: TLC59581RTQR provides temperature-stable constant current (±2% device-to-device) and thermal shutdown protection under solar heating. Use Value: Maintains consistent brightness and color balance across wide temperature range while preventing thermal runaway in sealed enclosures. |
| High-Density Rental LED Stage Panel | Architectural RGB Linear Lighting System |
|
Use Scenario: Modular stage rental panel with hot-swappable tiles, requiring rapid reconfiguration and daisy-chained control. IC Role / Device Role / Timing Role: TLC59581RTQR enables seamless tile replacement via SOUT→SIN daisy chain and supports dynamic brightness scaling via BC/CC registers. Use Value: Reduces setup time and eliminates manual trim-pot adjustments - allows real-time white-point correction across heterogeneous tile batches. |
Use Scenario: Long-run linear lighting with distributed TLC59581RTQR nodes driving 12V RGB strips over 10+ meters. IC Role / Device Role / Timing Role: TLC59581RTQR sinks current locally at each node, minimizing voltage drop; LOD detects broken segments remotely. Use Value: Enables segment-level fault isolation and automatic brightness compensation - improves maintenance efficiency and system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59582RTQR | Same pinout and feature set, but supports only 16-multiplexing (vs. 32 for TLC59581RTQR); identical current specs and protection features | Better suited for lower-resolution panels or cost-sensitive designs where 32-mux is unnecessary | Select TLC59582RTQR when refresh rate requirements are ≤1920 Hz and thermal budget allows reduced mux count |
| IS31FL3743B-QFLS4-TR | 48-channel, 12-bit PWM, no pre-charge FET or caterpillar cancellation; supports only 16-mux; lacks LOD and dual-SRAM architecture | Targeted at consumer-grade signage with lower visual fidelity requirements and simpler fault handling | Choose IS31FL3743B-QFLS4-TR only for non-critical indoor displays where ghosting and open-LED diagnostics are not required |
Compared with TLC59582RTQR and IS31FL3743B-QFLS4-TR, the TLC59581RTQR uniquely delivers 32-multiplex capability, integrated caterpillar cancellation, and programmable LOD - making it the only option for professional-grade, high-refresh, mission-critical LED video systems.
Availability
TLC59581RTQR is available at Aetrix Electronics and suitable for LED video walls, outdoor signage, stage rental panels, and architectural lighting requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TLC59581RTQR 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 specializing in analog, embedded processing, and power management technologies with decades of LED driver innovation.
The TLC59581RTQR belongs to TI's high-performance LED driver product line, engineered specifically for professional-grade, high-refresh-rate RGB LED display systems demanding precision current matching, robust fault detection, and thermal resilience.
FAQ
What is the maximum multiplexing ratio supported by the TLC59581RTQR?
The TLC59581RTQR supports up to 32-multiplexing, enabling high-refresh-rate operation in dense LED panels. This is double the 16-mux capability of the pin-compatible TLC59582RTQR. The 32-mux mode relies on internal timing logic synchronized to the GCLK signal and requires proper line-address sequencing via Vsync commands. The TLC59581RTQR achieves this without external timing components, making it ideal for scalable video wall architectures.
How does the LED open detection (LOD) function work in the TLC59581RTQR?
The TLC59581RTQR implements programmable LED open detection with four selectable voltage thresholds (0.2 V to 0.8 V). When enabled, it monitors each output channel during the off-phase and flags opens via a dedicated LOD bit readable through the serial interface. The LOD status is stored in a 48-bit register accessible via READSID command. This allows system-level firmware to isolate faulty LEDs without visual inspection - a critical feature for large-scale deployed signage where manual testing is impractical.
Can the TLC59581RTQR drive LEDs with different forward voltages on the same IC?
Yes, the TLC59581RTQR supports independent voltage rails per color group: OUTR0–15, OUTG0–15, and OUTB0–15 can each connect to separate VLED supplies. Its constant-current sink architecture ensures accurate current regulation regardless of forward voltage mismatch - for example, red LEDs (~2.0 V) and blue LEDs (~3.4 V) may be driven simultaneously without cross-talk or current deviation. This flexibility simplifies power design in multi-color LED modules.
What is the role of the pre-charge FET in the TLC59581RTQR?
The integrated pre-charge FET in the TLC59581RTQR actively discharges LED capacitance before line activation, eliminating residual charge that causes ghosting in multiplexed displays. During the blanking interval between line scans, the FET briefly connects the output to ground, ensuring rapid voltage settling. This hardware-level solution works in concert with caterpillar cancellation circuitry to suppress artifacts - unlike software-based methods, it requires no additional MCU overhead or timing calibration.
Does the TLC59581RTQR require external components for basic operation?
Yes - the TLC59581RTQR requires an external IREF resistor (connected between IREF and IREFGND) to set full-scale output current, plus decoupling capacitors (recommended: 100 nF ceramic + 10 µF tantalum near VCC). No external clock or timing components are needed: GCLK, SCLK, and LAT are provided by the host controller. The thermal pad must be soldered to a solid GND plane for thermal compliance. All other functions - including LOD, TSD, and pre-charge - are fully integrated and require no external circuitry.
TLC59581RTQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 48
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 10V
- Current - Output / Channel:
- 25mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-QFN (8x8)
TLC59581RTQR FAQ
1.How can I place an order for TLC59581RTQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59581RTQR 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 TLC59581RTQR reliable?
The price and inventory of TLC59581RTQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59581RTQR is usually 5 days.
3.What payment methods are accepted for TLC59581RTQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59581RTQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59581RTQR?
TLC59581RTQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59581RTQR 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 TLC59581RTQR?
For technical support, including TLC59581RTQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59581RTQR requirements.
6.How does Aetrix verify that TLC59581RTQR is sourced from the original manufacturer or authorized distributors?
All TLC59581RTQR 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 TLC59581RTQR meets industry standards.
7.What is the process for return or replacement of TLC59581RTQR?
All TLC59581RTQR units undergo pre-shipment inspection (PSI). If there is an issue with TLC59581RTQR, 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 TLC59581RTQR part is unused and in its original packaging.
Return procedure for TLC59581RTQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59581RTQR 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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