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Texas Instruments TLC59291RGET
- Part No.:
- TLC59291RGET
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TLC59291RGET.pdf
- Description:
- IC LED DRIVER LINEAR 50MA 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,110
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Product details
Overview
TLC59291RGET from Texas Instruments is a 16-channel constant-current LED sink driver with 7-bit global brightness control (128 steps), ±3% channel-to-channel current accuracy, and integrated LED open/short detection with invisible detection mode (IDM). It operates from 3 V to 5.5 V supply and supports up to 10 V LED forward voltage, targeting high-reliability LED video displays and industrial indicator systems.
For engineers reviewing the TLC59291RGET datasheet, TLC59291RGET pinout, TLC59291RGET application, or TLC59291RGET equivalent, key selection criteria include its dual-mode BLANK/SOUT configuration (8- or 16-channel daisy-chain), power-save mode (10 µA typical), thermal warning (138°C) and shutdown (150°C), and output leakage detection down to 3 µA - all critical for fault-tolerant LED lighting designs.
Technical Context
The TLC59291RGET implements a 16-bit serial shift register with latch-controlled output update via LAT, supporting daisy-chained configurations. Its constant-current sink outputs are set by a single external IREF resistor (1.32–66 kΩ), enabling precise per-channel current programming from 1–50 mA depending on VCC.
It integrates six diagnostic flags - LED Open Detection (LOD), LED Short Detection (LSD), Output Leakage Detection (OLD), Reference Terminal Short Flag (ISF), Pre-Thermal Warning (PTW), and Thermal Error Flag (TEF) - all readable via serial interface. IDM allows error detection even when outputs are off, and BLANK pin serves dual roles: SOUT select (mode 0) or global output enable (mode 1).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 constant-current sink outputs (configurable as 8- or 16-channel via BLANK pin) |
| Current range | 1–40 mA at VCC ≤3.6 V; 1–50 mA at VCC >3.6 V - set by external IREF resistor |
| Brightness control | 7-bit global (128-step) PWM dimming - applied uniformly across all 16 channels |
| Current accuracy | ±3% channel-to-channel (typical); ±2% device-to-device (typical) - ensures uniform LED intensity |
| Diagnostic capability | LOD/LSD with invisible detection mode (IDM), OLD (3 µA leak threshold), PTW (138°C), TSD (150°C) |
| Power consumption | 10 µA typical in power-save mode (all outputs off); <7 mA active mode (full load, VCC=5 V) |
| Operating temperature | –40°C to +85°C ambient; junction limit 125°C continuous, 150°C shutdown |
Pinout & Package
Package: VQFN-24 (4.00 mm × 4.00 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (bottom side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LAT | Data latch input | Rising edge transfers 16-bit shift register contents to output on/off latch - synchronizes LED state update |
| SCLK | Serial clock input | Rising edge shifts data from SIN into 16-bit shift register; also clocks SOUT data out |
| SIN | Serial data input | Accepts 16-bit on/off control data; LSB first, shifted in on SCLK rising edge |
| SOUT | Serial data output | Configurable: bit 7 (8-ch mode) or bit 15 (16-ch mode) of shift register - enables daisy-chaining |
| BLANK | Mode-select / enable | Mode 0: selects SOUT bit position; Mode 1: forces all outputs OFF when high |
| IREF | Current reference terminal | Resistor to GND sets max sink current per channel (1.32–66 kΩ → 1–50 mA range) |
| OUT0–OUT15 | Constant-current sink outputs | 16 independent open-drain outputs; each sinks programmed current when enabled |
| VCC | Logic supply | 3.0–5.5 V digital core supply - powers logic, registers, and interface circuitry |
| GND | Ground | Common reference for logic, analog, and thermal pad - must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode BLANK pin | Enables flexible system architecture: either SOUT bit selection (for 8/16-ch chaining) or global output disable - no extra control lines needed |
| Invisible Detection Mode (IDM) | Performs LOD/LSD diagnostics while outputs remain OFF - eliminates visible flicker during fault checking in live displays |
| Power-save mode | Reduces ICC to 10 µA (typ) when all outputs disabled - critical for battery-backed or energy-sensitive LED signage |
| Thermal protection suite | Pre-warning at 138°C + shutdown at 150°C with 10°C hysteresis - prevents thermal runaway in enclosed LED modules |
| Output leakage detection | Identifies <3 µA leakage paths before catastrophic failure - enhances long-term reliability in high-voltage LED strings |
| 16-bit daisy-chain capability | Supports scalable LED arrays: one microcontroller pin drives unlimited TLC59291RGET devices via SIN→SOUT cascading |
Applications
| LED Video Display Backlighting | Industrial Panel Indicator Array |
|---|---|
Use Scenario: Driving uniform backlight zones in large-format indoor LED video walls with real-time brightness calibration. IC Role / Device Role / Timing Role: Constant-current sink controller managing 16 parallel LED strings per tile, synchronized via LAT and daisy-chained SOUT. Use Value: ±3% channel matching ensures pixel-level luminance consistency; IDM enables silent fault scanning without display interruption. |
Use Scenario: Controlling status indicators on factory HMIs where LED failure must trigger immediate maintenance alerts. IC Role / Device Role / Timing Role: Fault-aware LED driver with integrated LOD/LSD reporting via serial readback after each LAT pulse. Use Value: Invisible detection mode confirms open-circuit LEDs during normal operation - no downtime required for diagnostics. |
| Architectural LED Signage | Automotive Interior Lighting Control |
Use Scenario: Powering segmented monochrome LED signs in commercial buildings with remote brightness scheduling. IC Role / Device Role / Timing Role: 7-bit global dimming controller receiving time-of-day commands over UART-to-SPI bridge. Use Value: 128-step linear brightness scaling enables smooth fade transitions; 10 µA power-save extends standby life in unattended installations. |
Use Scenario: Managing ambient lighting zones in vehicle cabins with thermal derating for under-dash mounting. IC Role / Device Role / Timing Role: Thermally protected LED sink with PTW flag triggering MCU-based current reduction before TSD activation. Use Value: Pre-thermal warning at 138°C allows graceful dimming instead of abrupt shutdown - maintains user experience during hot conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940RHBR | 16-channel, but uses internal DAC + dot-correction (12-bit per channel); no built-in LOD/LSD; requires external VREF | Superior grayscale fidelity for high-end displays; lacks integrated diagnostics for predictive maintenance | Select when per-channel brightness tuning outweighs fault detection needs |
| MAX7219CWG+ | 8-digit/64-LED scan driver; multiplexed (not constant-current sink); no thermal or leakage monitoring | Optimized for 7-segment/LED matrix displays; limited to 5.5 V, no LED voltage headroom beyond VCC | Choose for alphanumeric panels where cost and simplicity trump diagnostic depth |
Compared with TLC59291RGET, TLC5940RHBR offers finer per-channel control but requires external fault circuitry, while MAX7219CWG+ provides lower BOM cost for static displays but cannot support high-VF LEDs or thermal safety-critical lighting.
Availability
TLC59291RGET is available at Aetrix Electronics and suitable for LED video displays, industrial panel indicators, architectural signage, and automotive interior lighting requiring stable component supply, long-lifecycle support, and integrated diagnostics.
Supply support for TLC59291RGET 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, with decades of expertise in power management and LED control solutions.
The TLC59291RGET belongs to TI's precision LED driver product line, engineered for fault-resilient, high-density LED systems where diagnostic visibility, thermal robustness, and daisy-chain scalability are mandatory design requirements.
FAQ
What is the maximum LED forward voltage supported by the TLC59291RGET?
The TLC59291RGET supports LED forward voltages up to 10 V on its OUT0–OUT15 pins, independent of the 3–5.5 V VCC supply. This allows direct driving of multi-LED series strings without external boost circuitry, provided the total VF remains ≤10 V and thermal limits are observed. The TLC59291RGET datasheet specifies an absolute maximum output voltage of 11 V.
How does the BLANK pin function in dual-mode operation on the TLC59291RGET?
The BLANK pin on the TLC59291RGET operates in two configurable modes defined by FC9. In Mode 0, BLANK selects SOUT bit position (bit 7 for 8-channel, bit 15 for 16-channel daisy-chaining). In Mode 1, BLANK acts as a global output enable: LOW permits normal operation, HIGH forces all 16 outputs OFF regardless of latch data. This dual role reduces external control lines in scalable LED systems.
Can the TLC59291RGET detect LED faults while the outputs are turned off?
Yes - the TLC59291RGET supports Invisible Detection Mode (IDM) for LED Open Detection (LOD) and LED Short Detection (LSD). When enabled, IDM performs diagnostics during brief, controlled ON pulses while the main output state remains OFF, allowing real-time fault identification without visible LED flicker or disruption to display operation. This capability is unique to the TLC59291RGET among TI's LED drivers.
What is the purpose of the IREF pin on the TLC59291RGET, and how is current set?
The IREF pin on the TLC59291RGET is the current reference terminal: connecting an external resistor (1.32–66 kΩ) between IREF and GND sets the maximum sink current per channel. For example, a 3.6 kΩ resistor yields ~18.3 mA per output at VCC = 3.3 V. The TLC59291RGET uses this reference to generate highly matched currents across all 16 channels, with ±3% channel-to-channel accuracy confirmed in the datasheet.
Does the TLC59291RGET support power-saving features for low-idle applications?
Yes - the TLC59291RGET includes a dedicated power-save mode that reduces total supply current to 10 µA (typical) when all outputs are disabled. Activation occurs automatically when the on/off latch data is all zeros and the PSMODE bit is set. Recovery to full operation takes <50 µs, making it suitable for battery-powered signage or IoT-connected LED systems requiring ultra-low standby consumption.
TLC59291RGET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 50mA
- Frequency:
- 33MHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
TLC59291RGET FAQ
1.How can I place an order for TLC59291RGET through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59291RGET 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 TLC59291RGET reliable?
The price and inventory of TLC59291RGET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59291RGET is usually 5 days.
3.What payment methods are accepted for TLC59291RGET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59291RGET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59291RGET?
TLC59291RGET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59291RGET 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 TLC59291RGET?
For technical support, including TLC59291RGET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59291RGET requirements.
6.How does Aetrix verify that TLC59291RGET is sourced from the original manufacturer or authorized distributors?
All TLC59291RGET 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 TLC59291RGET meets industry standards.
7.What is the process for return or replacement of TLC59291RGET?
All TLC59291RGET units undergo pre-shipment inspection (PSI). If there is an issue with TLC59291RGET, 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 TLC59291RGET part is unused and in its original packaging.
Return procedure for TLC59291RGET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59291RGET Tags
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UFD-7
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