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Texas Instruments TLC59108IPWR
- Part No.:
- TLC59108IPWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC59108IPWR.pdf
- Description:
- IC LED DRVR LINEAR 120MA 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,255
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Product details
Overview
TLC59108IPWR from Texas Instruments is an I²C-bus-controlled 8-channel constant-current LED sink driver optimized for RGBA color mixing and backlight applications. It delivers 256-step individual PWM (97 kHz), 256-step group dimming/blink (190 Hz to 10.73 s), 3.3–5.5 V operation, up to 120 mA per channel, and open-load/overtemperature error detection - used in gaming UI illumination and industrial status indicators.
For engineers reviewing the TLC59108IPWR datasheet, TLC59108IPWR pinout, TLC59108IPWR application, or TLC59108IPWR equivalent, key selection considerations include its Fm+ I²C interface (1 MHz, 30 mA SDA drive), hardware address pins (A0–A3, 14-device bus capacity), REXT-based current programming (10–120 mA), 17 V max output voltage, and integrated thermal shutdown with error flag reporting.
Technical Context
The TLC59108IPWR integrates dual PWM architectures: eight independent 97-kHz, 256-step brightness controllers per OUT0–OUT7, plus one shared 256-step group controller supporting fixed 190-Hz dimming or programmable blink (24 Hz to 10.73 s). Its internal 25-MHz oscillator eliminates external timing components.
It supports Fast Mode Plus (Fm+) I²C at up to 1 MHz with 30-mA SDA drive strength for high-capacitance buses, noise filtering on SCL/SDA inputs, and three software-programmable sub-call addresses plus one all-call address for coordinated multi-device control - enabling marquee effects or synchronized RGB updates without bus congestion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 8 constant-current sink outputs (OUT0–OUT7), each independently controllable |
| Current range | 10 mA to 120 mA per channel, set by external REXT resistor (720 Ω → 26 mA; 360 Ω → 52 mA) |
| PWM resolution | 256-step (8-bit) individual brightness + 256-step group dimming/blink, both linearly programmable |
| I²C interface | Fm+ compatible (1 MHz max), 30-mA SDA drive, noise-filtered SCL/SDA, supports hot insertion |
| Supply voltage | 3.0 V to 5.5 V - interoperable with both 3.3 V and 5 V logic/system rails |
| Max output voltage | 17 V - supports common LED forward voltages including series-connected RGBA strings |
| Error detection | Per-channel open-load and overtemperature sensing with EFLAG register readout |
Pinout & Package
Package: TSSOP-20 (6.50 mm × 4.40 mm), lead-free, RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A3 | Hardware I²C address inputs | Set device's base I²C address; enable up to 14 TLC59108IPWR devices on same bus |
| OUT0–OUT7 | Constant-current LED sink outputs | Each drives LED cathode to GND; logic-low = LED ON (sink mode); max 120 mA, 17 V compliance |
| REXT | Current reference input | Connects external resistor to set identical full-scale current across all 8 channels |
| SCL / SDA | I²C clock/data bidirectional lines | Fm+ compliant (1 MHz); SDA has 30-mA drive for >4000 pF bus loads; internal pull-downs disabled |
| RESET | Active-low hardware reset | Holding low ≥10 ns forces power-on-reset state: all outputs high (LED off), registers cleared |
| VCC / GND | Power supply terminals | VCC accepts 3.0–5.5 V; three GND pins (pins 8, 13, 16) reduce ground impedance and improve thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Individual + group PWM control | Simultaneous per-LED brightness (97 kHz) and synchronized blink/dim (190 Hz–10.73 s) - enables dynamic UI effects with minimal I²C traffic |
| Open-load & overtemperature detection | Per-channel fault monitoring with latched EFLAG bits - allows firmware to identify failed LEDs or thermal overload without external sensors |
| Software Reset (SWRST) | I²C command (0x96 + 0xA5 + 0x5A) resets all registers to POR defaults - eliminates need for physical RESET line in space-constrained designs |
| Four I²C sub-call addresses | One ALLCALL + three SUBCALL addresses let groups of devices respond to single commands - e.g., update all red LEDs across 10 drivers in one write |
| No external oscillator required | Integrated 25-MHz oscillator ensures precise 97-kHz and 190-Hz PWM frequencies - removes BOM cost and layout area for crystal/capacitors |
Applications
| Gaming Interface Lighting | Industrial Status Indicators |
|---|---|
|
Use Scenario: RGB LED arrays on gaming keyboards and controllers provide real-time feedback for key presses, macros, and game states. IC Role / Device Role / Timing Role: TLC59108IPWR acts as a dedicated LED sink driver, managing 8 independent color channels with synchronized blink/dim for visual alerts. Use Value: 256-step individual brightness enables smooth color gradients; group blink (24 Hz–10.73 s) creates attention-grabbing status pulses without CPU polling. |
Use Scenario: Panel-mounted status lights on PLCs, HMIs, and test equipment indicate operational mode, faults, or process stages. IC Role / Device Role / Timing Role: TLC59108IPWR serves as a fault-tolerant LED driver with built-in open-circuit and overtemperature detection per channel. Use Value: EFLAG register reporting allows immediate firmware response to LED failure or thermal stress - improving system reliability and reducing maintenance downtime. |
| Small-Scale Signage | RGB Backlight Control |
|
Use Scenario: Compact digital signage (e.g., retail shelf labels, kiosk buttons) uses discrete RGB LEDs for brand-color illumination and interactive prompts. IC Role / Device Role / Timing Role: TLC59108IPWR provides precise current regulation and independent PWM control for consistent color point and luminance across multiple units. Use Value: Hardware address pins (A0–A3) allow daisy-chaining up to 14 displays on one I²C bus - simplifying wiring and reducing MCU GPIO usage. |
Use Scenario: Small LCD backlights (e.g., medical handhelds, portable instruments) require balanced white light via RGB LED mixing. IC Role / Device Role / Timing Role: TLC59108IPWR drives red, green, blue, and amber LEDs with matched current accuracy (±3% channel-to-channel) and stable 97-kHz PWM. Use Value: Constant-current matching and flicker-free 97-kHz PWM eliminate visible beat frequencies and ensure uniform brightness across viewing angles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59116IPWR | 16-channel version with identical 97-kHz PWM, same REXT current setting, but adds auto-increment register addressing and enhanced error reporting | Better suited for larger LED arrays requiring >8 outputs; higher pin count (24-pin TSSOP) and larger PCB footprint | Select TLC59116IPWR when scaling beyond 8 LEDs while retaining identical control architecture and firmware compatibility |
| PCA9685PW | 16-channel, 202-Hz PWM base frequency (not 97 kHz), no open-load detection, lower max output current (25 mA), no overtemperature sensing | Lacks fault diagnostics and high-current capability; suitable only for non-critical indicator lighting with lower brightness demands | Choose PCA9685PW only for cost-sensitive, low-power indicator applications where diagnostic features and >25 mA/channel are unnecessary |
Compared with TLC59108IPWR, TLC59116IPWR extends channel count and diagnostics without changing core timing or interface behavior, whereas PCA9685PW sacrifices reliability features and performance for lower cost and simpler implementation - making TLC59108IPWR the optimal balance of intelligence, drive strength, and integration for mid-complexity LED systems.
Availability
TLC59108IPWR is available at Aetrix Electronics and suitable for gaming peripherals, industrial HMI panels, small-format signage, and portable device backlighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TLC59108IPWR 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 TLC59108IPWR belongs to TI's LED driver product line, designed specifically for high-fidelity, fault-aware LED control in consumer, industrial, and automotive human-interface applications - emphasizing programmability, thermal robustness, and I²C scalability.
FAQ
What is the maximum output current per channel for the TLC59108IPWR?
The TLC59108IPWR supports up to 120 mA per output channel (OUT0–OUT7), set precisely by the external REXT resistor. At REXT = 360 Ω, typical output current is 52 mA; at REXT = 180 Ω, it reaches 104 mA. The absolute maximum rating is 120 mA, and current accuracy is ±8% over temperature and supply variation. This makes TLC59108IPWR suitable for driving medium-brightness LEDs directly without external boost circuitry.
Does the TLC59108IPWR support I²C Fast Mode Plus, and what does that enable?
Yes, the TLC59108IPWR is fully Fast Mode Plus (Fm+) compatible, operating at up to 1 MHz I²C clock frequency with 30-mA SDA drive capability. This allows reliable communication on heavily loaded buses (up to 4000 pF), supports longer trace lengths, and enables faster LED configuration updates - critical for real-time UI effects in gaming or industrial interfaces using the TLC59108IPWR.
How does open-load detection work on the TLC59108IPWR?
The TLC59108IPWR performs open-load detection by comparing actual channel current (IOUT) against a threshold (0.5 × target current) whenever the output is enabled. If current falls below threshold, the corresponding bit in the EFLAG register is set to '0', indicating an open circuit. This feature requires the channel to be actively sinking current - it cannot detect opens when the output is OFF. Firmware reads EFLAG to identify failed LEDs without external circuitry.
Can the TLC59108IPWR drive LEDs with forward voltages above 5 V?
Yes, the TLC59108IPWR supports up to 17 V on its OUTx pins, allowing it to drive series-connected LED strings with combined forward voltages well above 5 V - such as three white LEDs (~9–10 V total) or four red/amber LEDs (~8–9 V). The device regulates current regardless of VOUT, provided VOUT remains ≤17 V and within the recommended operating conditions specified in the TLC59108IPWR datasheet.
What is the purpose of the REXT pin on the TLC59108IPWR?
The REXT pin on the TLC59108IPWR connects to an external resistor that sets the reference current for all eight output channels. The output current scales inversely with REXT value: for example, 720 Ω yields ~26 mA, 360 Ω yields ~52 mA, and 180 Ω yields ~104 mA. This single-point adjustment ensures matched current across all channels and eliminates per-channel calibration - a key design advantage of the TLC59108IPWR over discrete current-source solutions.
TLC59108IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- 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-TSSOP
TLC59108IPWR FAQ
1.How can I place an order for TLC59108IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59108IPWR 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 TLC59108IPWR reliable?
The price and inventory of TLC59108IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59108IPWR is usually 5 days.
3.What payment methods are accepted for TLC59108IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59108IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59108IPWR?
TLC59108IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59108IPWR 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 TLC59108IPWR?
For technical support, including TLC59108IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59108IPWR requirements.
6.How does Aetrix verify that TLC59108IPWR is sourced from the original manufacturer or authorized distributors?
All TLC59108IPWR 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 TLC59108IPWR meets industry standards.
7.What is the process for return or replacement of TLC59108IPWR?
All TLC59108IPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC59108IPWR, 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 TLC59108IPWR part is unused and in its original packaging.
Return procedure for TLC59108IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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