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Texas Instruments TLC59582RTQT
- Part No.:
- TLC59582RTQT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
TLC59582RTQT.pdf
- Description:
- IC LED DRIVER LINEAR 25MA 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:323
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Product details
Overview
TLC59582RTQT from Texas Instruments is a 48-channel, 16-bit enhanced serial PWM LED driver with constant-current sink outputs, pre-charge FET, LED open detection (LOD), and caterpillar-canceling circuitry. It supports 16-multiplexing, delivers up to 25 mA per channel at 5 VCC, and features 3-bit global brightness control (BC) and 9-bit per-color brightness control (CC) across red/green/blue groups for high-density LED video displays.
For engineers reviewing the TLC59582RTQT datasheet, TLC59582RTQT pinout, TLC59582RTQT application, or TLC59582RTQT equivalent, key selection criteria include its 56-pin VQFN package with thermal pad, 33 MHz grayscale clock (GCLK), 25 MHz data shift clock (SCLK), ±3% channel-to-channel current accuracy, and support for daisy-chained configurations in multiplexed LED panels requiring precise low-grayscale fidelity and system-level fault detection.
Technical Context
The TLC59582RTQT implements an ES-PWM architecture with dual 48-kbit SRAM banks (A/B) enabling seamless frame buffering and high refresh rates in multiplexed LED systems. Its functional block integrates a 48-bit common shift register, programmable group delay, LOD voltage comparator, and thermal shutdown (TSD) circuitry triggered at 170°C with 10°C hysteresis.
It operates in 8+8 mode (SEL_PWM = 0) with 129 GCLK cycles per line segment, supporting 16-line multiplexing. The device uses IREF resistor-based current programming (RIREF = 7.5 kΩ for 25 mA target), with separate analog ground (IREFGND) and power ground (GND) pins to minimize noise coupling into the reference path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 48 constant-current sink outputs, grouped as 16 red (OUTR0–15), 16 green (OUTG0–15), 16 blue (OUTB0–15) |
| Grayscale Resolution | 16-bit (65,536-step) PWM per channel - enables smooth dimming down to 0.0015% duty cycle |
| Max Sink Current | 25 mA per channel at VCC = 4–5.5 V - sufficient for driving high-brightness LEDs without external boost |
| Current Accuracy | ±3% max channel-to-channel, ±2% max device-to-device - ensures uniform luminance across multi-color LED arrays |
| Clock Frequencies | SCLK up to 25 MHz, GCLK up to 33 MHz - supports >1,200 Hz frame rates in 16-mux configurations |
| Operating Temp | –40°C to +85°C ambient - validated for outdoor signage and industrial display environments |
| LED Supply Range | VLED up to 10 V - accommodates series-connected LED strings with forward voltages up to 3.3 V × 3 |
Pinout & Package
Package: 56-pin VQFN (RTQ), 8.00 mm × 8.00 mm body with exposed thermal pad soldered to PCB ground plane for thermal management (RθJB = 5.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IREF | Reference current input | Connects external resistor (e.g., 7.5 kΩ) to set full-scale output current; placement near IREFGND minimizes noise |
| IREFGND | Analog reference ground | Dedicated AGND return for IREF; must route separately to common GND point to avoid digital noise injection |
| GCLK | Grayscale clock input | Rising edge increments GS counter; 33 MHz max rate defines PWM resolution and refresh timing granularity |
| SCLK | Serial data clock input | Shifts 48-bit data into common register on rising edge; 25 MHz max enables fast frame loading |
| LAT | Data latch control | Falling edge transfers shift register contents to GS memory or FC registers; critical for synchronized frame updates |
| SIN | Serial data input | LSB-first 48-bit GS/FC data stream; high/low state sampled on SCLK rising edge |
| SOUT | Serial data output | MSB of shift register - enables daisy-chaining multiple TLC59582RTQT devices without external logic |
| OUTR0–15 | Red LED sink outputs | Individually controlled constant-current sinks; may be paralleled to increase drive capability per LED |
| OUTG0–15 | Green LED sink outputs | Same electrical specs as OUTR; independent CC register allows color balancing without hardware changes |
| OUTB0–15 | Blue LED sink outputs | Same electrical specs; 9-bit CC register compensates for blue LED efficiency variance vs. R/G |
| VCC | Power supply | 3.0–5.5 V digital/analog supply; decoupling required within 5 mm of pin per layout guidelines |
| GND / Thermal Pad | Power ground | Thermal pad is electrically connected to GND; mandatory soldering ensures thermal reliability and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Pre-Charge FET | Activates before main output turn-on to charge LED parasitic capacitance - eliminates ghosting in high-speed multiplexed scanning |
| Caterpillar Cancelling Circuit | Detects open-LED faults and dynamically adjusts adjacent line timing - prevents vertical streak artifacts in failed-pixel scenarios |
| LED Open Detection (LOD) | Four threshold levels (VLOD0–VLOD3) configurable via FC register - enables robust fault reporting without external sense resistors |
| Low-Grayscale Enhancement (LGSE) | Nonlinear GS counter mapping below 128 counts - improves visual uniformity at 0.2–5% brightness levels |
| Power-Save Mode | Reduces ICC to 0.8 mA typical when all outputs disabled - lowers standby power in always-on display systems |
| Dual-Bank SRAM | 48-kbit memory split into two 24-kbit banks - allows background frame loading while active bank drives display |
Applications
| LED Video Wall | Transportation Signage |
|---|---|
Use Scenario: Indoor/outdoor large-format video wall using 16× multiplexed SMD2121 RGB LED modules with 4K resolution and >3,000 nits brightness. IC Role / Device Role / Timing Role: TLC59582RTQT serves as the primary constant-current sink driver per module, managing 48 channels per IC with synchronized GCLK across daisy-chained units. Use Value: 16-bit grayscale and LGSE ensure flicker-free motion rendering and accurate grayscale reproduction at low brightness settings required for HDR content. | Use Scenario: Real-time bus/train destination displays operating in wide temperature ranges (–40°C to +85°C) with vibration exposure and frequent power cycling. IC Role / Device Role / Timing Role: TLC59582RTQT provides fault-tolerant LED drive with LOD reporting and caterpillar cancellation to maintain legibility despite individual LED failures. Use Value: TSD protection and IREF short-circuit detection prevent thermal runaway during extended operation, extending field service intervals. |
| High-Density Rental LED Panel | Architectural Lighting Control |
Use Scenario: Modular rental LED panels (500×500 mm) used in live events, requiring hot-swappable modules and rapid reconfiguration for varying resolutions. IC Role / Device Role / Timing Role: TLC59582RTQT enables daisy-chain configuration with SOUT→SIN interconnect, reducing controller-to-module wiring complexity and enabling firmware-based mux ratio adjustment. Use Value: Dual-SRAM banks allow zero-latency frame swaps during live broadcasts, eliminating visible tearing during dynamic content transitions. | Use Scenario: Dynamic façade lighting with color-tunable white and RGB zones, controlled via DMX512 or Art-Net over Ethernet with local PWM processing. IC Role / Device Role / Timing Role: TLC59582RTQT acts as the final-stage PWM driver, receiving serialized GS/BC/CC data from microcontroller-based bridge ICs. Use Value: Independent 9-bit CC per color group allows precise CCT tuning (2700K–6500K) and pastel color mixing without gamma lookup tables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59581RTQT | Supports 32-multiplexing (vs. 16 for TLC59582RTQT); identical pinout, package, and register map | Better suited for ultra-high-density panels requiring >1,000 Hz refresh at full resolution | Select TLC59581RTQT only if 32-line mux is required; otherwise TLC59582RTQT offers same feature set with relaxed timing margins |
| IS31FL3729-QFLS4 | 48-channel, 12-bit PWM, no LOD or caterpillar cancellation; uses I²C interface instead of serial shift | Lower cost for non-critical indoor signage where fault tolerance is secondary to BOM simplicity | Choose IS31FL3729-QFLS4 for space-constrained designs needing I²C control; avoid where open-LED detection or ghosting mitigation is mandatory |
Compared with TLC59581RTQT, the TLC59582RTQT trades multiplexing depth for improved timing margin and lower GCLK dependency, while the IS31FL3729-QFLS4 sacrifices diagnostic features and grayscale depth for interface simplicity and reduced MCU GPIO usage.
Availability
TLC59582RTQT is available at Aetrix Electronics and suitable for LED video walls, transportation signage, and high-density rental panels requiring stable component supply, long-term production continuity, and guaranteed TI second-sourcing paths.
Supply support for TLC59582RTQT 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 high-reliability ICs for industrial, automotive, and communications markets.
The TLC5958x product line was designed specifically for high-refresh, high-density multiplexed LED displays - integrating advanced PWM timing, fault diagnostics, and thermal resilience into a single-package solution for professional-grade visual systems.
FAQ
What is the maximum multiplexing ratio supported by the TLC59582RTQT?
The TLC59582RTQT supports up to 16-line multiplexing, defined by its internal timing architecture and 129 GCLK cycles per line segment. This differs from the TLC59581RTQT, which supports 32-line multiplexing. The 16-mux capability of the TLC59582RTQT is fixed in silicon and cannot be increased via firmware or configuration. Applications requiring higher density must use TLC59581RTQT or cascade multiple TLC59582RTQT devices with synchronized GCLK.
How does the LED Open Detection (LOD) function work in the TLC59582RTQT?
The TLC59582RTQT implements LOD by monitoring voltage at each OUTXn pin during the off-state and comparing it to one of four programmable thresholds (VLOD0–VLOD3). When an open LED causes the pin voltage to exceed the selected threshold, the corresponding bit in the 48-bit LOD register is set. This register is readable via the serial interface after issuing a READSID command. The TLC59582RTQT does not auto-correct open-LED conditions but provides real-time fault visibility for system-level error handling.
Can the TLC59582RTQT drive LEDs with forward voltages exceeding 5.5 V?
Yes - the TLC59582RTQT's output stage supports VLED up to 10 V, independent of the 3.0–5.5 V VCC supply. This allows direct driving of series-connected LED strings (e.g., three 3.3 V blue LEDs = 9.9 V total) without external high-voltage drivers. However, the VCC supply must remain within its specified range, and thermal design must account for increased power dissipation at higher VLED – VOUT differentials.
What is the purpose of the IREFGND pin on the TLC59582RTQT?
The IREFGND pin on the TLC59582RTQT provides a dedicated analog ground return path for the IREF current-setting resistor, isolating reference current sensing from noisy digital ground currents. It must be routed as a short, low-impedance trace to the system's analog ground plane and connected to the main GND at a single point near the power entry. Failure to separate IREFGND from digital GND can cause ±10% current drift due to ground bounce coupling into the reference path.
Does the TLC59582RTQT require external components for basic operation?
Yes - the TLC59582RTQT requires at minimum: (1) an external IREF resistor (e.g., 7.5 kΩ for 25 mA full scale), (2) 100 nF ceramic decoupling capacitors on VCC and IREF pins, (3) pull-up resistors on GCLK (250–750 kΩ), and (4) pull-down resistors on LAT (250–750 kΩ). The thermal pad must be soldered to PCB GND. No external MOSFETs, op-amps, or level shifters are needed for standard operation within datasheet limits.
TLC59582RTQT 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)
TLC59582RTQT FAQ
1.How can I place an order for TLC59582RTQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59582RTQT 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 TLC59582RTQT reliable?
The price and inventory of TLC59582RTQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59582RTQT is usually 5 days.
3.What payment methods are accepted for TLC59582RTQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59582RTQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59582RTQT?
TLC59582RTQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59582RTQT 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 TLC59582RTQT?
For technical support, including TLC59582RTQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59582RTQT requirements.
6.How does Aetrix verify that TLC59582RTQT is sourced from the original manufacturer or authorized distributors?
All TLC59582RTQT 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 TLC59582RTQT meets industry standards.
7.What is the process for return or replacement of TLC59582RTQT?
All TLC59582RTQT units undergo pre-shipment inspection (PSI). If there is an issue with TLC59582RTQT, 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 TLC59582RTQT part is unused and in its original packaging.
Return procedure for TLC59582RTQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59582RTQT Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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