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Texas Instruments TLC59482DBQ
- Part No.:
- TLC59482DBQ
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
TLC59482DBQ.pdf
- Description:
- IC LED DRIVER LINEAR 45MA 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
TLC59482DBQ from Texas Instruments is a 16-channel, 16-bit PWM LED driver with 6-bit global brightness control, constant-current sink outputs (1–45 mA), 33 MHz grayscale clock support, and daisy-chain serial interface. It enables high-contrast, flicker-free LED video displays and signboards requiring precise per-channel dimming and synchronized multi-device timing.
For engineers reviewing the TLC59482DBQ datasheet, TLC59482DBQ pinout, TLC59482DBQ application, or TLC59482DBQ equivalent, key selection criteria include sink current accuracy (±1% channel-to-channel), GSCLK timing tolerance (10 ns pulse width), IREF resistor-based current programming, and SSOP-24 package thermal performance (θJA = 86.7°C/W).
Technical Context
The TLC59482DBQ implements a three-stage grayscale data latch architecture (first/second/third) synchronized to GSCLK rising edges, enabling enhanced spectrum (ES) PWM with 128 display segments for reduced visual artifacts. Its 16-bit PWM resolution (65,536 steps) is updated via 256-bit serial shift register using SIN/SCLK/LAT protocol.
Global brightness control operates independently via 6-bit BC register (0–63), scaling all 16 output currents linearly while preserving grayscale ratios. Four-grouped output switching delay prevents inrush current during simultaneous channel activation, critical for high-density LED arrays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 constant-current sink outputs (OUT0–OUT15), individually PWM-controllable |
| Grayscale Resolution | 16-bit (65,536 steps) per channel, supporting smooth dimming without visible stepping |
| Global Brightness Control | 6-bit (64 steps, 0–100%), applied uniformly across all channels to correct inter-driver luminance mismatch |
| Sink Current Range | 1–35 mA (VCC ≤3.6 V) or 1–45 mA (VCC >3.6 V), set by single external IREF resistor |
| Timing Clocks | SCLK up to 30 MHz; GSCLK up to 33 MHz; LAT pulse width ≥10 ns |
| Current Accuracy | ±1% (typ) channel-to-channel; ±2% (typ) device-to-device at TA = +25°C |
| Operating Temperature | –40°C to +85°C ambient, with junction limit of +125°C |
Pinout & Package
The TLC59482DBQ is housed in a 24-pin SSOP (Shrink Small Outline Package) with exposed thermal pad (not internally connected to GND). Pin 1 is located at top-left corner when notch faces upward; thermal pad must be externally soldered to PCB ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1, 22) | Power ground reference | Primary return path for all sink currents and internal logic; requires low-impedance PCB connection |
| VCC (Pin 24) | Supply voltage input | 3.0–5.5 V digital/analog supply; powers logic core and current sinks |
| IREF (Pin 23) | Reference current setting | Resistor from IREF to GND programs max sink current (1–45 mA); VIREF = 1.20 V (typ) |
| LAT (Pin 4) | Data latch strobe | Falling edge transfers 256-bit GS/BC/FC data from shift register into active latches; internally pulled down (500 kΩ) |
| SIN (Pin 2) | Serial data input | MSB-first 256-bit stream (GS ×16 + BC + FC) shifted in on SCLK rising edges |
| SCLK (Pin 3) | Shift clock input | Drives data entry into 16-bit common shift register; max 30 MHz operation |
| GSCLK (Pin 21) | Grayscale timing clock | Rising-edge-triggered PWM counter clock; 33 MHz max; resets on TMGRST/LATGS commands |
| SOUT (Pin 22) | Serial data output | MSB of shift register; supports READFC command for function control data readback |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | Each drives one LED cathode; supports parallel grouping and independent voltage rails per channel |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced Spectrum (ES) PWM | Distributes ON-time across 128 display segments to minimize PWM-induced flicker and EMI in large LED panels |
| Auto Display Repeat & Refresh | Hardware-controlled GS data auto-repeat eliminates MCU intervention during active display periods |
| Four-Grouped Output Switching | Staggers turn-on of OUT0–OUT15 across four groups to limit peak inrush current during power-up or brightness transitions |
| Display Timing Reset | TMGRST command forces all outputs OFF and resets GS counter to zero, ensuring deterministic display start |
| Function Control Data Latch | Stores BC default (32), XRFRESH, TMRSTEN, LATMODE, and XRST bits for non-volatile configuration |
Applications
| LED Video Displays | LED Signboards |
|---|---|
Use Scenario: High-resolution indoor/outdoor video walls with >10,000 LEDs per panel requiring uniform brightness and color fidelity. IC Role / Device Role / Timing Role: Primary grayscale PWM driver controlling 16 LED strings per IC; daisy-chained for panel-wide synchronization. Use Value: 16-bit PWM resolution eliminates contouring artifacts; ±1% channel-to-channel current matching ensures pixel-level luminance consistency. | Use Scenario: Dynamic roadside signage with variable message content, operating continuously under wide temperature (-40°C to +85°C) and voltage (3.0–5.5 V) ranges. IC Role / Device Role / Timing Role: Constant-current sink driver for alphanumeric LED segments; uses BC register to compensate for LED aging across multiple units. Use Value: 6-bit global brightness control enables field-adjustable luminance calibration; 45 mA sink capability supports high-brightness red/amber LEDs. |
| Architectural Lighting | Stage & Entertainment Lighting |
Use Scenario: RGBW linear lighting strips in commercial buildings where smooth dimming and color mixing are critical. IC Role / Device Role / Timing Role: Per-channel current controller for R/G/B/W LED strings; leverages independent OUTx voltage rails for optimal forward voltage matching. Use Value: Independent sink outputs allow different LED types per channel; ES PWM reduces audible noise in quiet environments. | Use Scenario: Moving-head fixtures and LED battens requiring rapid, synchronized intensity changes across hundreds of LEDs. IC Role / Device Role / Timing Role: High-speed PWM driver with 33 MHz GSCLK and sub-10 ns timing margins for frame-accurate lighting cues. Use Value: 30 MHz SCLK and 33 MHz GSCLK enable <100 μs full-panel update; grouped switching prevents power rail droop during strobe effects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5947RTQR | 24-channel, 12-bit PWM, no global brightness control; QFN-32 package | Lacks BC register and ES PWM; suited for cost-sensitive, lower-resolution displays | Select when higher channel count is needed but 16-bit resolution and BC are not required |
| IS31FL3731-QFLS4-TR | 16-channel, 8×8 matrix driver with built-in oscillator; I²C interface; 12-bit PWM | Integrated matrix scanning eliminates external row/column drivers; no daisy-chain capability | Select for compact, I²C-based designs where matrix topology matches layout |
Compared with TLC5947RTQR and IS31FL3731-QFLS4-TR, the TLC59482DBQ uniquely delivers 16-bit grayscale precision, hardware-enforced global brightness correction, and ES PWM for flicker-sensitive installations-making it optimal for premium video and architectural lighting where visual quality is non-negotiable.
Availability
TLC59482DBQ is available at Aetrix Electronics and suitable for LED video displays, architectural lighting systems, and stage lighting equipment requiring stable component supply, long-term production continuity, and guaranteed TI original sourcing.
Supply support for TLC59482DBQ 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 connectivity technologies with over 50 years of innovation in power management and signal chain solutions.
The TLC59482 belongs to TI's high-precision LED driver product line, engineered specifically for professional-grade visual applications demanding flicker-free operation, tight current matching, and robust thermal performance in compact SSOP packaging.
FAQ
What is the maximum sink current capability of the TLC59482DBQ per channel?
The TLC59482DBQ supports 1–35 mA per channel when VCC ≤3.6 V, and 1–45 mA per channel when VCC >3.6 V. This is set by an external resistor (RIREF) between IREF and GND, with VIREF fixed at 1.20 V (typ). The TLC59482DBQ achieves this range while maintaining ±1% (typ) channel-to-channel current matching across all 16 outputs.
How does the Enhanced Spectrum (ES) PWM mode reduce visual artifacts in the TLC59482DBQ?
The TLC59482DBQ's ES PWM divides each full grayscale period into 128 display segments and distributes ON-time across them using a deterministic sequence. This spreads energy spectrally, reducing both visible flicker and electromagnetic interference compared to standard PWM. The TLC59482DBQ implements this entirely in hardware, requiring no additional MCU overhead or timing-critical firmware.
Can the TLC59482DBQ be daisy-chained, and what interface signals are required?
Yes, the TLC59482DBQ supports seamless daisy-chaining using SIN → SOUT connections between devices. Only three control lines are required per chain: SCLK (shared), LAT (shared), and GSCLK (shared). Each device shifts its 256-bit data (16×16-bit GS + 6-bit BC + function bits) through the chain, with SOUT of one feeding SIN of the next-enabling scalable LED array control with minimal MCU GPIO usage.
What is the role of the LAT pin in the TLC59482DBQ, and what timing constraints apply?
The LAT pin on the TLC59482DBQ is a latching strobe: its falling edge transfers data from the 16-bit common shift register into the appropriate destination latch (GS first/second/third, BC, or FC). The TLC59482DBQ requires LAT↓ to occur after valid data is fully shifted in, with minimum pulse width of 10 ns and setup/hold times of 2 ns and 14 ns relative to SCLK↑, respectively.
Does the TLC59482DBQ require external components for basic operation, and which ones are mandatory?
Yes-the TLC59482DBQ requires two mandatory external components: (1) a resistor (RIREF) between IREF and GND to set maximum sink current, and (2) decoupling capacitors (typically 100 nF ceramic + 10 μF tantalum) between VCC and GND. No external oscillator or clock generator is needed, as GSCLK and SCLK are provided by the host controller. The TLC59482DBQ's SSOP-24 thermal pad must also be soldered to a PCB ground plane.
TLC59482DBQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 10V
- Current - Output / Channel:
- 45mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
TLC59482DBQ FAQ
1.How can I place an order for TLC59482DBQ through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59482DBQ 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 TLC59482DBQ reliable?
The price and inventory of TLC59482DBQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59482DBQ is usually 5 days.
3.What payment methods are accepted for TLC59482DBQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59482DBQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59482DBQ?
TLC59482DBQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59482DBQ 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 TLC59482DBQ?
For technical support, including TLC59482DBQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59482DBQ requirements.
6.How does Aetrix verify that TLC59482DBQ is sourced from the original manufacturer or authorized distributors?
All TLC59482DBQ 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 TLC59482DBQ meets industry standards.
7.What is the process for return or replacement of TLC59482DBQ?
All TLC59482DBQ units undergo pre-shipment inspection (PSI). If there is an issue with TLC59482DBQ, 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 TLC59482DBQ part is unused and in its original packaging.
Return procedure for TLC59482DBQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59482DBQ Tags
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