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Texas Instruments TLC59108IRGYR
- Part No.:
- TLC59108IRGYR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
TLC59108IRGYR.pdf
- Description:
- IC LED DRVR LINEAR 120MA 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,684
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Product details
Overview
TLC59108IRGYR from Texas Instruments is an 8-channel constant-current LED sink driver with I²C Fast Mode Plus (1 MHz) interface, 97-kHz individual PWM per channel (256-step brightness), 190-Hz group dimming/blink (256-step), and open-load/overtemperature error detection - used in RGB backlighting, signage, and industrial HMI panels.
For engineers reviewing the TLC59108IRGYR datasheet, TLC59108IRGYR pinout, TLC59108IRGYR application, or TLC59108IRGYR equivalent, this page delivers verified electrical specs, validated VQFN-20 package mapping, confirmed I²C timing compliance, and real-world design implications for LED current regulation, thermal fault handling, and multi-device bus addressing.
Technical Context
The TLC59108IRGYR integrates a 25-MHz internal oscillator (no external crystal required), supports hardware address selection via A0–A3 pins (14 unique addresses), and implements dual-layer PWM: per-channel 97-kHz fixed-frequency control with 0–99.6% duty cycle, plus group-level 190-Hz or programmable 24 Hz–10.73 s blinking. Its output stage sinks up to 120 mA per channel with 17 V max output voltage tolerance.
It features noise-filtered SCL/SDA inputs, active-low RESET with internal pull-up, software reset (SWRST call at 0x96), and error reporting via EFLAG register for open-circuit and channel-specific overtemperature events - all operating across 3.0–5.5 V supply with –40°C to +85°C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 8 constant-current sink outputs (OUT0–OUT7), each programmable for off/on/PWM mode |
| Max Output Current | 120 mA per channel, set by external REXT resistor (10–120 mA range) |
| PWM Resolution | 256-step (8-bit) individual brightness control at 97 kHz; 256-step group dimming/blink at 190 Hz or 24 Hz–10.73 s |
| I²C Interface | Fm+ compatible up to 1 MHz, with 30-mA SDA drive strength for high-capacitance buses |
| Supply Voltage | 3.0 V to 5.5 V - supports both 3.3-V and 5-V system rails without level shifting |
| Error Detection | Per-channel open-load detection (threshold = 0.5× target current) and thermal shutdown with restart hysteresis |
| Package | VQFN-20 (RGY), 4.50 mm × 3.50 mm, exposed thermal pad for improved power dissipation |
Pinout & Package
VQFN-20 (RGY) package with 4.50 mm × 3.50 mm body size and exposed thermal pad on underside - optimized for compact LED driver layouts and thermal management in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REXT | Current reference input | Connects external resistor to set all eight output currents simultaneously; 10–120 mA range |
| A0–A3 | Hardware address inputs | Four binary inputs enabling up to 14 unique I²C addresses per bus (00h–0Dh) |
| OUT0–OUT7 | Constant-current sink outputs | Open-drain NMOS outputs; sink current to GND when active - drives LEDs cathode-side |
| SCL / SDA | I²C bus interface | Fm+ compliant; SDA supports 30-mA drive for >4000 pF bus capacitance |
| RESET | Active-low reset input | Pull low ≥10 ns to force POR-equivalent state; requires external pull-up if unused |
| VCC / GND | Power supply terminals | VCC accepts 3.0–5.5 V; three GND pins (pins 8, 13, 16) reduce ground impedance and improve noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual-layer PWM architecture | Independent 97-kHz per-channel brightness + superimposed 190-Hz or programmable group blink/dim - enables smooth color mixing and attention-grabbing effects |
| Open-load and thermal fault reporting | EFLAG register provides per-channel status bits for open-circuit (IOUT < 0.5× target) and channel-specific overtemperature - enables runtime diagnostics without external sensors |
| Software Reset (SWRST) | Full register reset via I²C command (0x96 + 0xA5 + 0x5A) - eliminates need for hardware RESET assertion during firmware updates |
| Multi-device bus coordination | Four Sub Call I²C addresses allow grouped commands (e.g., all red LEDs) - reduces I²C traffic by up to 75% in multi-color arrays |
| Hot-insertion support | No glitch on power-up; outputs remain high-impedance until configuration completes - prevents unintended LED turn-on during board insertion |
Applications
| RGB Backlight Control | Gaming HMI Panels |
|---|---|
Use Scenario: Driving red/green/blue LED strings in LCD backlight modules for portable displays and medical monitors. IC Role / Device Role / Timing Role: Constant-current sink driver with synchronized 97-kHz PWM per channel to eliminate beat frequencies and ensure flicker-free color blending. Use Value: Precise 256-step per-channel brightness control enables >16M color gamut coverage while maintaining consistent white point across luminance levels. |
Use Scenario: Illuminating dynamic status indicators, button backlights, and animated edge lighting on gaming keyboards and controllers. IC Role / Device Role / Timing Role: Group-blink controller with programmable 24 Hz–10.73 s period and 0–99.6% duty cycle - generates attention-grabbing visual feedback without MCU intervention. Use Value: Offloads blink timing generation from host MCU, freeing CPU cycles for game logic while ensuring jitter-free, synchronized LED animation. |
| Industrial Signage | Smart Factory HMIs |
Use Scenario: Powering alphanumeric LED displays and segmented signs in factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with open-load detection and thermal shutdown - reports failed segments before catastrophic failure. Use Value: Enables predictive maintenance by flagging open-circuit LEDs via I²C readback, reducing unplanned downtime in 24/7 operations. |
Use Scenario: Controlling status LEDs on PLC I/O modules, motor drives, and sensor nodes deployed in harsh industrial settings. IC Role / Device Role / Timing Role: Robust I²C interface with noise filtering and 30-mA SDA drive - maintains reliable communication over long traces and noisy 24-V DC power domains. Use Value: Eliminates need for external I²C buffers or level shifters in DIN-rail mounted equipment, simplifying BOM and layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59116IRHBR | 16-channel version in 32-pin VQFN; identical 97-kHz PWM, Fm+ I²C, and error reporting - but larger footprint and higher quiescent current | Required when >8 LED channels needed per IC; not drop-in due to pin count, package, and register map differences | Select TLC59116IRHBR only when channel density justifies added PCB area and cost - no benefit for 8-channel designs |
| PCA9685PW | 16-channel 12-bit PWM driver; 1.6-MHz I²C; no open-load/thermal detection; 25-mA max per channel; TSSOP-28 package | Lacks fault diagnostics and high-current capability - suitable for low-power indicator LEDs but not backlight or signage loads | Choose PCA9685PW only for cost-sensitive, non-critical indicator applications where diagnostics and >25 mA/channel are unnecessary |
Compared with TLC59108IRGYR, TLC59116IRHBR offers double channel count at the expense of layout area and power, while PCA9685PW trades diagnostic capability and current drive for lower cost and higher PWM resolution - making TLC59108IRGYR the optimal balance for industrial-grade 8-channel LED control.
Availability
TLC59108IRGYR is available at Aetrix Electronics and suitable for RGB backlighting, gaming HMI panels, and industrial signage requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TLC59108IRGYR 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 decades of expertise in precision power management and interface solutions.
The TLC59108IRGYR belongs to TI's LED driver portfolio designed specifically for high-reliability, multi-color LED control in industrial, automotive, and consumer display systems - emphasizing fault resilience, bus scalability, and thermal robustness.
FAQ
What is the maximum output voltage rating for TLC59108IRGYR?
The TLC59108IRGYR supports a maximum output voltage of 17 V on its OUT0–OUT7 pins. This allows direct driving of common LED strings (e.g., 3–5 white LEDs in series) without external voltage translation, provided the cathodes are connected to the outputs and anodes tied to a supply ≤17 V above GND.
How does the TLC59108IRGYR implement open-load detection?
The TLC59108IRGYR detects open-circuit conditions by comparing actual output current against a threshold equal to 0.5× the target current (e.g., 13 mA for 26 mA setting). This check occurs only when the channel is enabled; the result is stored in the EFLAG register and readable via I²C - enabling real-time LED health monitoring without external circuitry.
Can TLC59108IRGYR operate from a 3.3-V supply?
Yes, the TLC59108IRGYR operates across 3.0 V to 5.5 V, fully supporting 3.3-V systems. Its I²C interface meets Fast Mode Plus specifications at 3.3 V, and all logic thresholds (VIH = 0.7×VCC, VIL = 0.3×VCC) are met - eliminating need for level shifters when interfacing with 3.3-V microcontrollers.
What is the function of the REXT pin on TLC59108IRGYR?
The REXT pin on TLC59108IRGYR connects to an external resistor that sets the reference current for all eight output channels. Using the formula IOUT = 12.6 V / REXT, values from 105 Ω to 1.26 kΩ yield 120 mA to 10 mA output current - allowing precise, matched current regulation across all channels with a single passive component.
Does TLC59108IRGYR support hot insertion into a live I²C bus?
Yes, the TLC59108IRGYR supports hot insertion: its I²C interface includes noise filters on SCL/SDA, and its power-on reset ensures outputs remain high-impedance until configuration completes. No glitch occurs during power-up, preventing unintended LED activation when the device is plugged into an active bus.
TLC59108IRGYR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 120mA
- Frequency:
- 25MHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (3.5x4.5)
TLC59108IRGYR FAQ
1.How can I place an order for TLC59108IRGYR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59108IRGYR 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 TLC59108IRGYR reliable?
The price and inventory of TLC59108IRGYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59108IRGYR is usually 5 days.
3.What payment methods are accepted for TLC59108IRGYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59108IRGYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59108IRGYR?
TLC59108IRGYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59108IRGYR 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 TLC59108IRGYR?
For technical support, including TLC59108IRGYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59108IRGYR requirements.
6.How does Aetrix verify that TLC59108IRGYR is sourced from the original manufacturer or authorized distributors?
All TLC59108IRGYR 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 TLC59108IRGYR meets industry standards.
7.What is the process for return or replacement of TLC59108IRGYR?
All TLC59108IRGYR units undergo pre-shipment inspection (PSI). If there is an issue with TLC59108IRGYR, 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 TLC59108IRGYR part is unused and in its original packaging.
Return procedure for TLC59108IRGYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59108IRGYR Tags
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