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Texas Instruments TLC59291RGER
- Part No.:
- TLC59291RGER
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TLC59291RGER.pdf
- Description:
- IC LED DRIVER LINEAR 50MA 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,923
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Product details
Overview
TLC59291RGER from Texas Instruments is a 16-channel constant-current sink LED 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 voltage, supports up to 10 V LED power rails, and delivers 1–50 mA per channel - used in high-reliability LED video displays and industrial indicator systems.
For engineers reviewing the TLC59291RGER datasheet, TLC59291RGER pinout, TLC59291RGER application, or TLC59291RGER equivalent, key selection criteria include its daisy-chainable serial interface (SIN/SCLK/LAT/BLANK/SOUT), thermal warning/shutdown protection, power-save mode (10 µA), and dual-mode BLANK pin functionality for 8/16-channel configuration.
Technical Context
The TLC59291RGER implements a 16-bit shift register with latch-controlled output update via LAT, enabling precise timing of LED on/off states. Its constant-current regulation is set by a single external IREF resistor (1.32–66 kΩ), and global brightness is digitally adjusted across all channels using a 7-bit BC register.
Error diagnostics-including LED open detection (LOD), LED short detection (LSD), output leakage detection (OLD), reference short flag (ISF), pre-thermal warning (PTW), and thermal shutdown (TSD)-are read back via the same serial interface. IDM allows LOD/LSD detection even when outputs are blanked.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 constant-current sink outputs (configurable as 8-channel via BLANK pin logic) |
| Current Range | 1–50 mA per channel (50 mA max at VCC > 3.6 V; 40 mA at VCC ≤ 3.6 V) |
| Brightness Control | 7-bit global dimming (128 discrete steps) applied uniformly across all channels |
| Current Accuracy | ±3% typical channel-to-channel mismatch; ±2% typical device-to-device variation |
| Supply Voltage | 3.0 V to 5.5 V for logic and bias; LED anode voltage supported up to 10 V |
| Quiescent Current | 10 µA typical in power-save mode (all outputs off); 2–14 mA active mode depending on load and BC setting |
| Operating Temp | –40°C to +85°C ambient; junction temperature monitored with PTW (125–150°C) and TSD (150–180°C) thresholds |
Pinout & Package
The TLC59291RGER is housed in a 24-pin VQFN package (4.00 mm × 4.00 mm) with exposed thermal pad on bottom side for enhanced heat dissipation in high-current LED applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LAT | Data latch input | Rising edge transfers 16-bit shift register contents into output on/off latch; synchronizes LED state updates |
| 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, synchronous with SCLK |
| SOUT | Serial data output | Outputs MSB (bit 15) or bit 7 of shift register depending on BLANK pin state and FC9 mode |
| BLANK | Multi-function control | Configurable: (1) SOUT select (8/16-ch mode) when FC9=0; (2) global output enable when FC9=1 |
| IREF | Current reference terminal | Connects external resistor (1.32–66 kΩ) to GND to set full-scale output current; open = outputs disabled |
| OUT0–OUT15 | Constant-current sinks | 16 independent, thermally isolated current sinks; each drives one LED cathode to GND |
| VCC | Power supply | 3.0–5.5 V digital/logic supply; powers internal logic, shift register, and control circuitry |
| GND | Ground reference | Three dedicated GND pins (pins 22, 2, and 3) minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Invisible Detection Mode (IDM) | Enables LOD/LSD fault detection while outputs remain OFF - critical for diagnostic integrity in standby or safety-critical lighting |
| Dual-mode BLANK pin | Supports both daisy-chain expansion (8-ch mode) and global output enable (16-ch mode) without external logic |
| Pre-thermal warning (PTW) | Asserts flag at 125–150°C junction temp, allowing system-level thermal derating before shutdown occurs |
| Power-save mode | Reduces ICC to 10 µA typical when all outputs are off - extends battery life in portable LED signage |
| Output leakage detection (OLD) | Detects ≥3 µA leakage at OUTx pins - identifies early-stage PCB contamination or LED degradation |
Applications
| LED Video Display | Industrial Indicator Panel |
|---|---|
Use Scenario: High-density outdoor LED display module requiring uniform brightness and real-time fault reporting across thousands of pixels. IC Role / Device Role / Timing Role: 16-channel constant-current sink driving RGB subpixels; LAT-synchronized latching ensures frame coherence; SOUT daisy-chaining reduces controller GPIO count. Use Value: ±3% channel matching eliminates visible banding; IDM enables continuous health monitoring without interrupting display operation. | Use Scenario: Factory HMI panel with status LEDs indicating machine state, safety interlocks, and maintenance alerts. IC Role / Device Role / Timing Role: Drives discrete indicator LEDs with programmable brightness; BLANK pin used as hardware emergency disable; PTW flag triggers predictive maintenance alerts. Use Value: Thermal warning and TSD prevent LED driver failure during prolonged operation; 10 µA power-save mode enables low-power sleep states. |
| Architectural Lighting Control | Automotive Interior Lighting |
Use Scenario: Tunable white LED strip controller in commercial buildings, requiring smooth dimming and long-term reliability. IC Role / Device Role / Timing Role: Configured in 16-ch mode to drive multiple LED strings; 7-bit BC register enables fine-grained 0.8% step dimming; IREF resistor sets current per string. Use Value: ±2% device-to-device accuracy ensures consistent color temperature across distributed controllers; OLD detection catches early insulation breakdown. | Use Scenario: Cabin ambient lighting system with dynamic color zones and occupant-responsive dimming profiles. IC Role / Device Role / Timing Role: Controls individual LED zones (e.g., footwell, door handle, overhead); LAT timing synchronized to vehicle CAN bus frames; SOUT feedback reports LED faults to body controller. Use Value: LOD/LSD detection meets automotive functional safety requirements (ASIL-B readiness); –40°C to +85°C rating supports under-dash mounting. |
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 dot-correction (12-bit) + grayscale (16-bit) PWM; no built-in LOD/LSD; requires external current-setting resistors per channel | Lacks integrated diagnostics and single-resistor current programming; better suited for high-fidelity grayscale video vs. robust industrial indication | Select TLC5940RHBR only when per-channel current tuning and finer PWM resolution outweigh diagnostic needs |
| MAX7219CWG+ | 8-digit/64-LED multiplexed driver; 4-wire SPI interface; fixed 30 mA per segment; no thermal or open/short detection | Designed for 7-segment/LED matrix displays; not suitable for direct-drive constant-current LED strings or diagnostic-heavy applications | Choose MAX7219CWG+ for cost-sensitive numeric displays where daisy-chaining and diagnostics are unnecessary |
Compared with TLC59291RGER, TLC5940RHBR offers higher PWM resolution but lacks on-chip fault detection and unified current programming, while MAX7219CWG+ provides simpler integration for multiplexed displays but cannot support 16 independent constant-current channels or thermal monitoring.
Availability
TLC59291RGER is available at Aetrix Electronics and suitable for LED video displays, industrial indicator panels, architectural lighting systems, and automotive interior lighting requiring stable component supply, long-term manufacturability, and integrated diagnostics.
Supply support for TLC59291RGER 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 power management solutions for industrial, automotive, and communications markets.
The TLC59291 product line was designed specifically for high-channel-count LED driver applications demanding integrated diagnostics, thermal resilience, and daisy-chain scalability - targeting industrial signage, architectural lighting, and safety-critical indicator systems.
FAQ
What is the maximum LED supply voltage supported by the TLC59291RGER?
The TLC59291RGER supports LED anode voltages up to 10 V on its OUT0–OUT15 pins. This allows direct connection to common 5 V, 9 V, or 12 V LED string supplies without external level-shifting. The device itself operates from a separate 3.0–5.5 V VCC rail, isolating logic and LED power domains. This architecture enables flexible system partitioning in multi-rail designs.
How does the BLANK pin function in TLC59291RGER, and can it be used for both daisy-chaining and output enable?
Yes - the BLANK pin on the TLC59291RGER has dual functionality controlled by Function Control bit FC9. When FC9 = 0, BLANK selects SOUT output source (bit 7 for 8-channel mode, bit 15 for 16-channel mode), enabling daisy-chaining. When FC9 = 1, BLANK acts as a hardware output enable: LOW enables normal operation, HIGH forces all 16 outputs OFF regardless of latch data. This eliminates need for external gating logic.
Does the TLC59291RGER support diagnostic readback, and how is error data retrieved?
Yes - the TLC59291RGER supports full diagnostic readback via its serial interface. Error flags (LOD, LSD, OLD, ISF, PTW, TEF) are stored in an internal Status Information Data (SID) register. By setting SIDLD bits in the Function Control latch, the host controller selects which flag set to load into the shift register, then reads it out via SOUT after issuing a LAT pulse. This enables non-intrusive, real-time health monitoring.
What is the purpose of Invisible Detection Mode (IDM) in the TLC59291RGER, and when is it activated?
Invisible Detection Mode (IDM) in the TLC59291RGER allows LED open and short detection to occur while the outputs remain OFF - preserving display black levels or indicator silence during diagnostics. IDM is activated when the IDMTIM bit is set and BLANK is held HIGH. During IDM, brief test pulses are applied to OUTx pins, and results are captured in the SID register without affecting visible LED state.
Can the TLC59291RGER operate in low-power mode, and what is its quiescent current in that state?
Yes - the TLC59291RGER features a dedicated power-save mode that reduces total VCC supply current to 10 µA typical when all outputs are OFF and the PSMODE bit is set. This mode retains register contents and remains responsive to incoming serial commands, making it ideal for battery-powered signage or systems requiring rapid wake-up. Normal active-mode current ranges from 2 mA to 14 mA depending on BC setting and load.
TLC59291RGER 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)
TLC59291RGER FAQ
1.How can I place an order for TLC59291RGER through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59291RGER 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 TLC59291RGER reliable?
The price and inventory of TLC59291RGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59291RGER is usually 5 days.
3.What payment methods are accepted for TLC59291RGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59291RGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59291RGER?
TLC59291RGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59291RGER 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 TLC59291RGER?
For technical support, including TLC59291RGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59291RGER requirements.
6.How does Aetrix verify that TLC59291RGER is sourced from the original manufacturer or authorized distributors?
All TLC59291RGER 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 TLC59291RGER meets industry standards.
7.What is the process for return or replacement of TLC59291RGER?
All TLC59291RGER units undergo pre-shipment inspection (PSI). If there is an issue with TLC59291RGER, 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 TLC59291RGER part is unused and in its original packaging.
Return procedure for TLC59291RGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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