My Inquiry
My Account
Texas Instruments TLC5941PWPG4
- Part No.:
- TLC5941PWPG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5941PWPG4.pdf
- Description:
- IC LED DRVR LINEAR 80MA 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,134
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLC5941PWPG4 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), and thermal error flag (TEF). It operates from 3.0 V to 5.5 V supply, supports up to 80 mA per channel, and targets high-precision LED signage and full-color display back-lighting.
For engineers reviewing the TLC5941PWPG4 datasheet, TLC5941PWPG4 pinout, TLC5941PWPG4 application, or TLC5941PWPG4 equivalent, key selection considerations include its HTSSOP-28 PowerPAD™ package, serial interface timing (30 MHz SCLK/GSCLK), IREF-based current programming, BLANK/ XLAT latch control, and dual-mode operation (GS vs DC register loading).
Technical Context
The TLC5941PWPG4 implements a dual-register architecture: 192-bit grayscale (GS) register for per-channel 12-bit PWM brightness control and 96-bit dot correction (DC) register for per-channel 6-bit current trimming. GS data determines ON-time duration within each 4096-clock grayscale cycle; DC data scales maximum sink current (0–100% of IMAX) independently per channel.
It features synchronous serial interface with SIN/SCLK/SOUT daisy-chaining, level-triggered XLAT latching, MODE-pin-selectable register load mode, and open-drain XERR output reporting LOD or TEF events. Thermal protection triggers at ~150°C junction temperature; LOD activates when OUTn voltage falls below 0.3–0.4 V under active drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 constant-current sink outputs (OUT0–OUT15), each programmable 0–80 mA |
| Grayscale resolution | 12-bit (4096-step) PWM control per channel - enables smooth brightness gradation in video-rate LED displays |
| Dot correction | 6-bit (64-step) per-channel current scaling - compensates for LED binning and PCB trace resistance variations |
| Serial interface speed | 30 MHz SCLK and GSCLK - supports fast data loading for large LED arrays with minimal frame latency |
| Supply voltage range | VCC = 3.0 V to 5.5 V - compatible with standard logic-level microcontrollers and industrial 3.3 V/5 V systems |
| Error detection | LED open detection (LOD) + thermal error flag (TEF), reported via open-drain XERR - enables system-level fault monitoring without additional sensors |
| Package | 28-pin HTSSOP with exposed PowerPAD™ thermal pad - provides low thermal impedance (31.58°C/W) for sustained 80 mA/channel operation |
Pinout & Package
Package: 28-pin HTSSOP (PWP) with exposed thermal pad (PowerPAD™), RoHS-compliant, rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT15 | Constant-current sink output | 16 individually controlled LED cathode drivers; each sinks up to 80 mA with ±4% channel-to-channel matching |
| SIN | Serial data input | MSB-first 96-bit (DC mode) or 192-bit (GS mode) shift register input; CMOS-compatible, VIH ≥ 0.8×VCC |
| SCLK | Serial clock input | Edge-triggered clock for SIN data shifting; max 30 MHz; twh0/twl0 ≥ 16 ns |
| XLAT | Latch control input | Level-triggered signal; rising edge not required - high state transfers shift register contents to GS or DC register |
| MODE | Operating mode select | GND = GS mode (192-bit load); VCC = DC mode (96-bit load); must be stable during XLAT high |
| IREF | Reference current setting | Connect external resistor to GND; sets IMAX = 31.5 × (1.24 V / RIREF); range: 5–80 mA |
| BLANK | Global output disable | Active-high signal forces all OUTn OFF and resets grayscale counter - used for blanking, PWM dimming, or fault recovery |
| XERR | Error status output | Open-drain output pulled low on LOD or TEF event; multiple devices can share single pull-up and interrupt line |
| GSCLK | Grayscale clock input | Defines PWM period base; each cycle = 4096 × GSCLK periods; max 30 MHz |
| SOUT | Serial data output | Daisy-chain output; shifts out status bits (LOD/TEF flags) or cascades to next TLC5941; CMOS output, IOL = 1 mA |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel 12-bit grayscale PWM | Enables flicker-free, 4096-step brightness control essential for video-grade LED displays and medical imaging backlighting |
| 6-bit dot correction per channel | Corrects luminance non-uniformity across 16 LEDs without external calibration hardware or firmware compensation tables |
| Integrated LED open detection | Monitors each OUTn voltage during active drive; reports open-circuit faults via XERR and serial status register - eliminates need for discrete sense resistors |
| Thermal error flag (TEF) | Triggers at ~150°C junction temperature; allows host MCU to throttle brightness or shut down before permanent damage occurs |
| Graduated output delay | 20 ns step between consecutive OUTn channels (0–300 ns total); reduces peak inrush current and eases bypass capacitor sizing |
| Single-resistor current programming | RIREF sets identical IMAX for all 16 channels - simplifies BOM, improves batch consistency, and avoids mismatch from multiple DACs |
Applications
| Outdoor LED Signage | Full-Color Video Wall |
|---|---|
|
Use Scenario: Large-format monochrome or RGB LED panels exposed to wide ambient temperature swings and long operational cycles. IC Role / Device Role / Timing Role: Constant-current sink driver managing 16 LEDs per IC; grayscale timing synchronized to video frame rate via GSCLK; BLANK used for inter-frame blanking. Use Value: 12-bit grayscale ensures smooth motion rendering; LOD detects failed LEDs before visible pixel dropout; PowerPAD™ enables reliable 80 mA/channel at 70°C ambient. |
Use Scenario: High-resolution indoor video wall using surface-mount RGB LEDs with tight brightness uniformity requirements. IC Role / Device Role / Timing Role: Per-module grayscale and dot correction controller; cascaded SIN/SOUT interfaces reduce MCU GPIO count; MODE pin toggles between GS/DC programming phases. Use Value: 6-bit dot correction corrects per-LED flux variation across 16 channels; 30 MHz SCLK supports rapid reconfiguration during live content updates. |
| Automotive Interior Lighting | Industrial Control Panel Backlighting |
|
Use Scenario: Dimmable, fault-tolerant LED backlighting for instrument clusters and center consoles meeting AEC-Q100 stress requirements. IC Role / Device Role / Timing Role: Current-regulated driver with thermal shutdown (TEF) and open-load detection (LOD); BLANK used for CAN-triggered dimming profiles. Use Value: TEF prevents thermal runaway in enclosed enclosures; LOD alerts ECU to replace failed backlight segments before safety-critical visibility loss. |
Use Scenario: Ruggedized HMI backlighting in factory environments where vibration, dust, and extended uptime demand high reliability. IC Role / Device Role / Timing Role: Primary LED driver with serial daisy-chaining for multi-zone control; XERR tied to PLC fault input for centralized diagnostics. Use Value: Single IREF resistor ensures consistent brightness across zones; HTSSOP PowerPAD™ withstands thermal cycling; LOD enables predictive maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5947RGER | 24-channel, same 12-bit GS/6-bit DC architecture; QFN-32 package; higher channel density but no PowerPAD™ thermal enhancement | Better suited for space-constrained PCBs needing >16 channels; lower per-channel thermal margin at 80 mA | Select TLC5947RGER when board area is critical and thermal load is distributed across more ICs |
| IS31FL3731-QFLS4-TR | 18-channel, I²C interface (not SPI), integrated auto-breathing, no LOD/TEF; 40 V output voltage rating | Preferred for low-pin-count MCU designs; lacks serial daisy-chain and fault reporting; higher VOUT supports longer LED strings | Select IS31FL3731-QFLS4-TR when I²C infrastructure exists and thermal/LOD diagnostics are secondary to ease of integration |
Compared with TLC5947RGER and IS31FL3731-QFLS4-TR, the TLC5941PWPG4 delivers superior thermal performance via PowerPAD™, deterministic serial timing for real-time video sync, and dual-fault reporting (LOD+TEF) essential for safety-critical LED systems - making it optimal for outdoor signage and automotive applications demanding robustness and precision.
Availability
TLC5941PWPG4 is available at Aetrix Electronics and suitable for outdoor LED signage, full-color video walls, automotive interior lighting, and industrial control panel backlighting requiring stable component supply and long-term production continuity.
Supply support for TLC5941PWPG4 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 power management technologies with over 50 years of innovation in industrial and automotive electronics.
The TLC5941 belongs to TI's high-precision LED driver product line, designed specifically for applications demanding uniform brightness, fault resilience, and scalable serial control in professional display and lighting systems.
FAQ
What is the maximum output current per channel for the TLC5941PWPG4?
The TLC5941PWPG4 supports a maximum constant-current sink of 80 mA per channel (OUT0–OUT15), set by an external resistor on the IREF pin. The relationship is IMAX = 31.5 × (1.24 V / RIREF). For example, a 640 Ω resistor yields ~61 mA typical, while 1.3 kΩ gives ~30 mA - enabling precise current tuning without recalibrating firmware or hardware.
How does the TLC5941PWPG4 implement LED open detection (LOD)?
The TLC5941PWPG4 monitors each OUTn voltage during active drive; if the voltage drops below 0.3–0.4 V while the channel is enabled, LOD triggers and pulls the XERR pin low. The corresponding LOD bit is latched into the status register on the falling edge of XLAT, allowing the host MCU to read fault location via SOUT - eliminating need for external voltage dividers or comparators.
Can the TLC5941PWPG4 be daisy-chained with other TLC5941 devices?
Yes, the TLC5941PWPG4 supports seamless daisy-chaining via SIN → SOUT connections. Data shifted into the first device's SIN propagates through SOUT to the next device's SIN. Cascading preserves timing integrity because SOUT output is registered and aligned to SCLK, enabling reliable expansion to hundreds of LED channels using a single MCU SPI interface.
What is the function of the MODE pin on the TLC5941PWPG4?
The MODE pin selects register-loading mode: grounded for 192-bit grayscale (GS) data loading, or tied to VCC for 96-bit dot correction (DC) data loading. This dual-mode architecture separates brightness control from current trimming - ensuring GS data is always loaded before DC data to prevent corruption of the first GS bit during power-up initialization.
Does the TLC5941PWPG4 require external components for thermal protection?
No - the TLC5941PWPG4 integrates a thermal error flag (TEF) circuit that asserts when junction temperature exceeds ~150°C. TEF is reported alongside LOD on the open-drain XERR pin and also stored in the serial status register. No external thermistor or monitoring circuitry is needed, reducing BOM cost and layout complexity while providing accurate, chip-level thermal awareness.
TLC5941PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
TLC5941PWPG4 FAQ
1.How can I place an order for TLC5941PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5941PWPG4 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 TLC5941PWPG4 reliable?
The price and inventory of TLC5941PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5941PWPG4 is usually 5 days.
3.What payment methods are accepted for TLC5941PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5941PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5941PWPG4?
TLC5941PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5941PWPG4 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 TLC5941PWPG4?
For technical support, including TLC5941PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5941PWPG4 requirements.
6.How does Aetrix verify that TLC5941PWPG4 is sourced from the original manufacturer or authorized distributors?
All TLC5941PWPG4 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 TLC5941PWPG4 meets industry standards.
7.What is the process for return or replacement of TLC5941PWPG4?
All TLC5941PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5941PWPG4, 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 TLC5941PWPG4 part is unused and in its original packaging.
Return procedure for TLC5941PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5941PWPG4 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
