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Texas Instruments TLC5941PWPR
- Part No.:
- TLC5941PWPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5941PWPR.pdf
- Description:
- IC LED DRVR LINEAR 80MA 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,888
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Product details
Overview
TLC5941PWPR from Texas Instruments is a 16-channel constant-current LED driver IC with integrated 12-bit grayscale PWM control (4096 steps), 6-bit dot correction (64 steps), LED open detection (LOD), thermal error flag (TEF), and serial interface supporting up to 30 MHz data transfer. It operates from 3.0 V to 5.5 V supply and drives LEDs with sink current up to 80 mA per channel, used in high-precision LED signage and full-color display back-lighting systems.
For engineers reviewing the TLC5941PWPR datasheet, TLC5941PWPR pinout, TLC5941PWPR application, or TLC5941PWPR equivalent, key selection considerations include its HTSSOP-28 PowerPAD™ package, IREF-set current programming, BLANK/ XLAT/ GSCLK timing-critical control, and dual-mode serial interface for grayscale vs. dot correction data loading.
Technical Context
The TLC5941PWPR implements a dual-register architecture: 192-bit grayscale (GS) register for 12-bit per-channel PWM brightness control and 96-bit dot correction (DC) register for 6-bit per-channel current trimming. Grayscale timing is synchronized to an external GSCLK input, while serial data is shifted in via SIN/SCLK and latched by XLAT under MODE pin control.
It features open-drain XERR output reporting both LOD and TEF errors, with BLANK enabling global output disable and grayscale counter reset. Output delay between OUT0–OUT15 is graduated (0 ns to 300 ns) to limit inrush current, and all 16 channels share a single IREF resistor for precise current scaling (Imax = 31.5 × VIREF/RIREF, VIREF = 1.24 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 constant-current sink outputs (OUT0–OUT15), each independently programmable |
| Grayscale Resolution | 12-bit (4096 steps) PWM control per channel - enables smooth brightness gradation in video-grade displays |
| Dot Correction | 6-bit (64 steps) per-channel current trim - compensates for LED binning and PCB trace variance |
| Max Sink Current | 80 mA per channel at VOUT ≤ 17 V - supports high-brightness LEDs without external drivers |
| Supply Voltage | 3.0 V to 5.5 V - compatible with standard logic-level microcontrollers and industrial 3.3 V/5 V rails |
| Data Rate | 30 MHz SCLK - enables fast refresh of large LED arrays (e.g., 192-bit GS + 96-bit DC in < 10 µs) |
| Error Detection | Integrated LOD (VLED threshold ≈ 0.35 V) and TEF (TJ > 150 °C) - reduces system-level fault monitoring overhead |
Pinout & Package
Package: 28-pin HTSSOP with PowerPAD™ (PWP), thermally enhanced for high-current operation; exposed thermal pad must be soldered to PCB copper for rated 80 mA/channel performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT15 | Constant-current sink output | 16 independent outputs; each sinks up to 80 mA; voltage tolerance up to 18 V allows direct connection to high-Vf LED strings |
| BLANK | Global output enable/disable | Active-high signal forces all outputs OFF and resets grayscale counter - critical for flicker-free frame blanking |
| XLAT | Data latch control | Level-triggered input; rising edge latches serial data into GS or DC register depending on MODE state |
| MODE | Serial interface mode select | GND = 192-bit GS mode; VCC = 96-bit DC mode - determines shift register length and register destination |
| IREF | Current reference input | Connects to GND via external resistor RIREF; sets Imax = 31.5 × (1.24 V / RIREF) - single-point calibration for all 16 channels |
| XERR | Open-drain error output | Drives low on LOD or TEF; supports wired-OR of multiple TLC5941PWPR devices for consolidated fault reporting |
| SIN / SCLK / SOUT | 3-wire serial interface | SIN receives 96/192-bit data; SCLK clocks data; SOUT outputs status bits (LOD/TEF flags) - enables daisy-chaining |
Key Features
| Feature | Design Value |
|---|---|
| Graduated output delay | 20 ns step between adjacent outputs (0–300 ns total); limits peak inrush current during simultaneous turn-on |
| Thermal error flag (TEF) | Detects junction temperature >150 °C; reported via XERR and readable in status register - prevents thermal runaway |
| LED open detection (LOD) | Monitors each OUTn for <0.35 V under active drive; latches fault on XLAT falling edge - enables per-channel LED health tracking |
| CMOS-level I/O compatibility | VIH = 0.8×VCC, VIL = 0.2×VCC; supports direct interfacing with 3.3 V and 5 V microcontrollers without level shifters |
| Controlled in-rush current | Internal delay circuitry and BLANK-synchronized startup reduce required bulk capacitance by >40% versus non-delayed drivers |
Applications
| LED Signage Control | Full-Color Video Wall |
|---|---|
|
Use Scenario: Outdoor monochrome LED signboards requiring uniform brightness across hundreds of modules. IC Role / Device Role / Timing Role: TLC5941PWPR acts as channel-matched current sink driver; GSCLK synchronizes PWM frames across cascaded units. Use Value: 6-bit dot correction compensates for LED aging and batch variation; 12-bit grayscale enables 16.7M color depth when combined with RGB subpixels. |
Use Scenario: Indoor high-resolution video wall using SMD RGB LEDs with tight luminance uniformity requirements. IC Role / Device Role / Timing Role: TLC5941PWPR provides per-subpixel current control; BLANK ensures zero-black-frame insertion for motion clarity. Use Value: Graduated output delay eliminates visible strobing during rapid frame updates; LOD detection enables automated pixel failure reporting. |
| Industrial Display Backlight | Architectural LED Strip Controller |
|
Use Scenario: Medical imaging displays requiring stable, flicker-free backlight with calibrated intensity over 10,000-hour lifetime. IC Role / Device Role / Timing Role: TLC5941PWPR serves as constant-current dimming engine; IREF resistor enables factory calibration traceability. Use Value: TEF monitoring prevents thermal derating drift; 30 MHz SCLK supports real-time gamma correction updates via host MCU. |
Use Scenario: Commercial architectural lighting with long LED strips (>5 m) and distributed thermal zones. IC Role / Device Role / Timing Role: TLC5941PWPR drives local LED segments; XERR wired-OR reports faults across 8+ daisy-chained ICs to central controller. Use Value: Single-resistor current setting simplifies BOM; LOD detection identifies open-circuit failures before strip-wide outage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5947PWR | 24-channel, same 12-bit GS/6-bit DC architecture; QFN-32 package; higher max current (120 mA) | Supports larger LED arrays without additional ICs; requires different PCB layout and thermal management | Select when channel count >16 is needed and board space allows QFN-32 footprint |
| IS31FL3731-QFLS4-TR | 16-channel, 8-bit GS only (no dot correction); I²C interface; integrated oscillator; smaller QFN-28 | Lacks per-channel current trimming; simpler control but lower brightness fidelity; no external clock dependency | Select for cost-sensitive, lower-precision applications where I²C integration outweighs grayscale/dot correction trade-offs |
Compared with TLC5947PWR, TLC5941PWPR offers proven thermal robustness in HTSSOP PowerPAD™ for sustained 80 mA operation, while IS31FL3731-QFLS4-TR trades dot correction capability for simplified I²C-based system integration and reduced external component count.
Availability
TLC5941PWPR is available at Aetrix Electronics and suitable for LED signage, full-color video walls, and industrial display back-lighting requiring stable component supply, long-term manufacturability, and consistent parametric performance across production batches.
Supply support for TLC5941PWPR 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 and embedded processing technologies, with decades of expertise in precision power management and LED control solutions.
The TLC5941PWPR belongs to TI's high-accuracy LED driver product line, designed specifically for applications demanding per-channel brightness uniformity, thermal reliability, and scalable multi-device synchronization in commercial and industrial displays.
FAQ
What is the maximum output current per channel for the TLC5941PWPR?
The TLC5941PWPR supports a maximum constant-current sink of 80 mA per channel (OUT0–OUT15) when configured with appropriate IREF resistor and thermal management. This rating assumes VOUT ≤ 17 V and proper PCB thermal design with PowerPAD™ soldered to ≥2 oz copper. At 80 mA, device power dissipation must remain within HTSSOP-28 PowerPAD™ derating limits (2058 mW at 85°C ambient).
How does the TLC5941PWPR implement dot correction and grayscale control?
The TLC5941PWPR uses two independent 96-bit (DC) and 192-bit (GS) internal registers. Dot correction (6-bit per channel) trims output current from 0% to 100% of Imax to compensate for LED variance; grayscale (12-bit per channel) controls PWM duty cycle for brightness. MODE pin selects between DC mode (96-bit load) and GS mode (192-bit load); XLAT latches data into respective registers.
Can multiple TLC5941PWPR ICs be cascaded, and how is data routed?
Yes - TLC5941PWPR supports daisy-chain configuration via SIN → SOUT interconnection. Serial data enters the first IC's SIN pin, shifts through its 96/192-bit register, and exits SOUT to the next IC's SIN. SCLK and XLAT are shared across all devices; MODE must be identical for all in chain. Status data (LOD/TEF bits) can also be read back sequentially from SOUT.
What is the function of the XERR pin on the TLC5941PWPR?
XERR is an open-drain error output that goes low when either LED open detection (LOD) or thermal error flag (TEF) is asserted. It supports wired-OR connection of multiple TLC5941PWPR devices to a single MCU interrupt line. The specific error source (LOD vs. TEF) can be distinguished by reading status bits via SOUT or by masking LOD with BLANK = HIGH during TEF-only monitoring.
Does the TLC5941PWPR require external components for basic operation?
Yes - the TLC5941PWPR requires at minimum: (1) an external resistor RIREF between IREF and GND to set Imax; (2) pull-up resistors on SOUT and XERR (typically 4.7 kΩ to VCC); (3) decoupling capacitors (0.1 µF ceramic near VCC/GND). TEST must be tied to VCC for dot correction functionality. No external clock generator is needed - GSCLK and SCLK are provided by the host controller.
TLC5941PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- 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:
- 17V
- Current - Output / Channel:
- 80mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Backlight, Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TLC5941PWPR FAQ
1.How can I place an order for TLC5941PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5941PWPR 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 TLC5941PWPR reliable?
The price and inventory of TLC5941PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5941PWPR is usually 5 days.
3.What payment methods are accepted for TLC5941PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5941PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5941PWPR?
TLC5941PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5941PWPR 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 TLC5941PWPR?
For technical support, including TLC5941PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5941PWPR requirements.
6.How does Aetrix verify that TLC5941PWPR is sourced from the original manufacturer or authorized distributors?
All TLC5941PWPR 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 TLC5941PWPR meets industry standards.
7.What is the process for return or replacement of TLC5941PWPR?
All TLC5941PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5941PWPR, 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 TLC5941PWPR part is unused and in its original packaging.
Return procedure for TLC5941PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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