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Texas Instruments TLC5941QPWPRQ1
- Part No.:
- TLC5941QPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5941QPWPRQ1.pdf
- Description:
- IC LED DRVR LINEAR 60MA 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
TLC5941QPWPRQ1 from Texas Instruments is a 16-channel automotive-grade constant-current LED sink driver with independent 12-bit grayscale PWM control (4096 steps) and 6-bit dot correction (64 steps), supporting up to 60 mA per channel and LED open detection (LOD) plus thermal error flag (TEF). It operates from 3.0 V to 5.5 V VCC, accepts up to 17 V LED supply, and targets high-reliability automotive LED indicator systems.
For engineers reviewing the TLC5941QPWPRQ1 datasheet, TLC5941QPWPRQ1 pinout, TLC5941QPWPRQ1 application, or TLC5941QPWPRQ1 equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), serial 30-MHz interface with cascading support, open-drain XERR fault reporting, and precise current matching across all 16 outputs.
Technical Context
The TLC5941QPWPRQ1 implements dual-register serial programming: GS register for 12-bit grayscale timing control and DC register for 6-bit per-channel current trimming. Its internal GS counter drives PWM output timing synchronized to GSCLK, while XLAT latches data into either register depending on MODE pin state (GND = GS mode, VCC = DC mode).
Fault diagnostics are hardware-integrated: LOD detects open LEDs by monitoring OUTn voltage drop (<0.3 V typical during current sink activation), and TEF triggers at ~160°C junction temperature. Both flags drive the open-drain XERR output, with LOD maskable via BLANK high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 16 independent constant-current sink outputs |
| Grayscale resolution | 12-bit (4096 steps), enabling fine brightness control per channel |
| Dot correction | 6-bit (64 steps), compensating for LED-to-LED and channel-to-channel current variation |
| Max output current | 60 mA per channel, set by single external IREF resistor |
| Supply voltage | VCC = 3.0 V to 5.5 V; LED anode supply up to 17 V |
| Data rate | 30 MHz SCLK, supporting fast serial updates and multi-device cascading |
| Operating temp | AEC-Q100 Grade 1: –40°C to 125°C ambient operating range |
Pinout & Package
Package: HTSSOP-28 (9.70 mm × 4.40 mm) with exposed thermal pad for enhanced power dissipation in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for all currents; connects to PCB ground plane under thermal pad |
| VCC | Logic supply input | 3.0–5.5 V digital core supply; must be powered before control signals |
| SIN | Serial data input | MSB-first 96-bit or 192-bit data stream for GS/DC registers or status readback |
| SCLK | Serial clock input | Rising-edge triggered shift clock; supports up to 30 MHz operation |
| XLAT | Latch control input | Level-triggered signal that transfers shift register contents to GS or DC register |
| MODE | Register select input | GND selects grayscale mode; VCC selects dot correction mode |
| GSCLK | Grayscale timing clock | Drives internal 12-bit counter; determines PWM frequency and brightness period |
| BLANK | Global output disable | Active-high signal forcing all OUTn OFF and resetting GS counter |
| IREF | Current reference terminal | Connects external resistor to set full-scale sink current (e.g., 640 Ω → 60 mA) |
| XERR | Open-drain error output | Asserts low on LOD or TEF; supports wired-OR fault bus with external pull-up |
| SOUT | Serial data output | Shifts out status bits (LOD/TEF/DC data) or cascades to next device's SIN |
| OUT0–OUT15 | Constant-current sinks | 16 individually controlled outputs; each delivers programmable current up to 60 mA |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to 125°C ambient), HBM ±2 kV, CDM ±500 V |
| Output delay staging | 20 ns fixed inter-channel delay (0–300 ns total across 16 outputs) reduces inrush current peaks |
| Status register access | 192-bit status packet (LOD flags, TEF flag, DC register contents) readable via SOUT after XLAT |
| Controlled in-rush current | Graduated turn-on timing eliminates need for oversized bulk capacitors on LED supply rail |
| Serial cascade capability | Single SCLK/SIN/XLAT/GSCLK/BLANK bus controls daisy-chained arrays without additional logic |
Applications
| Automotive Exterior Lighting | Dashboard LED Indicators |
|---|---|
Use Scenario: Driving side-marker lamps, brake lights, and turn signals requiring precise brightness matching and fault resilience. IC Role / Device Role / Timing Role: Constant-current sink driver delivering synchronized 12-bit PWM dimming and per-channel dot correction to compensate for LED binning variance. Use Value: Enables AEC-Q100-compliant lighting with <±4% output current matching and real-time open-LED detection to meet ASIL-B functional safety requirements. | Use Scenario: Backlighting segmented instrument cluster displays and warning indicators in harsh thermal environments. IC Role / Device Role / Timing Role: 16-channel current source managing mixed-color (red/amber/green) LEDs with independent grayscale control per segment. Use Value: Delivers stable luminance over –40°C to 125°C using integrated thermal error flag and current regulation insensitive to VCC drift. |
| Commercial Vehicle Signage | Automotive Interior Ambient Lighting |
Use Scenario: High-brightness LED message boards on buses and trucks exposed to vibration and wide temperature swings. IC Role / Device Role / Timing Role: Cascaded driver array controlling >100 LEDs with unified serial interface and distributed fault reporting via XERR bus. Use Value: Reduces wiring complexity with daisy-chain topology and enables system-level diagnostics through latched LOD/TEF status bits. | Use Scenario: Tunable RGB ambient lighting strips along door sills, footwells, and center consoles with smooth dimming transitions. IC Role / Device Role / Timing Role: Precision current sink providing flicker-free 4096-step PWM dimming synchronized across multiple color channels. Use Value: Achieves <1% grayscale linearity error and <±1% channel-to-channel current deviation for consistent color mixing. |
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, non-automotive grade, no AEC-Q100 qualification, lacks TEF and LOD diagnostics | Targeted at consumer display backlighting, not safety-critical automotive use | Select only if automotive qualification and fault reporting are unnecessary |
| MAX7219CWG+ | 8-digit/64-segment LED driver with built-in BCD decode; 500 kHz SPI max vs 30 MHz SCLK; no dot correction | Designed for 7-segment numeric displays, not high-resolution grayscale LED arrays | Choose when driving alphanumeric displays rather than programmable RGB or monochrome LED matrices |
Compared with TLC5941QPWPRQ1, TLC5947PWR offers higher channel count but omits automotive reliability features and diagnostics, while MAX7219CWG+ provides simpler digit control at the cost of grayscale precision and per-channel current tuning.
Availability
TLC5941QPWPRQ1 is available at Aetrix Electronics and suitable for automotive exterior lighting, dashboard indicators, and commercial vehicle signage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC5941QPWPRQ1 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 company specializing in analog and embedded processing solutions, with leadership in automotive electronics and high-reliability interface ICs.
The TLC5941-Q1 product line delivers AEC-Q100-qualified LED drivers optimized for automotive lighting systems demanding precise current matching, diagnostic coverage, and robust serial control in extreme thermal environments.
FAQ
What is the maximum LED supply voltage supported by the TLC5941QPWPRQ1?
The TLC5941QPWPRQ1 supports LED anode supply voltages up to 17 V, enabling direct connection to common automotive 12-V battery rails with margin for transients. This rating applies across the full –40°C to 125°C operating range and is independent of the 3.0–5.5 V VCC logic supply. The device maintains constant-current regulation even as LED forward voltage varies with temperature and aging.
How does the TLC5941QPWPRQ1 implement LED open detection (LOD)?
The TLC5941QPWPRQ1 implements LED open detection by monitoring the voltage at each OUTn pin during active current sinking. When an output is enabled and the measured voltage falls below 0.3 V (typical), the device asserts the LOD flag. This condition is latched into the status register upon the falling edge of XLAT and reported via XERR (open-drain) and bit positions 0–15 of the 192-bit status packet read from SOUT.
Can multiple TLC5941QPWPRQ1 devices be connected in series?
Yes, multiple TLC5941QPWPRQ1 devices can be daisy-chained using the SOUT-to-SIN connection. A single SCLK, XLAT, GSCLK, BLANK, and MODE bus controls the entire chain. Data propagates sequentially: the first device's SOUT feeds the second device's SIN, and so on. Total data length scales linearly (e.g., two devices require 192-bit GS data), preserving timing integrity at up to 30 MHz SCLK.
What is the function of the MODE pin on the TLC5941QPWPRQ1?
The MODE pin selects between grayscale (GS) and dot correction (DC) programming modes. When MODE = GND, serial data written via SIN/SCLK is latched into the 12-bit grayscale register on XLAT high. When MODE = VCC, the same serial interface writes to the 6-bit dot correction register. This dual-mode architecture enables separate calibration and brightness control without requiring distinct hardware interfaces.
How is the output current set on the TLC5941QPWPRQ1?
The output current for all 16 channels of the TLC5941QPWPRQ1 is set by a single external resistor connected to the IREF pin. Using the formula IOUT = 31.5 × (1.24 V / RIREF), a 640-Ω resistor yields ~60 mA per channel. Current matching across channels remains within ±4% over temperature, and the device supports load regulation of ±2%/V and line regulation of ±1%/V.
TLC5941QPWPRQ1 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:
- 60mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Backlight, Signage
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TLC5941QPWPRQ1 FAQ
1.How can I place an order for TLC5941QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5941QPWPRQ1 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 TLC5941QPWPRQ1 reliable?
The price and inventory of TLC5941QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5941QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TLC5941QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5941QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5941QPWPRQ1?
TLC5941QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5941QPWPRQ1 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 TLC5941QPWPRQ1?
For technical support, including TLC5941QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5941QPWPRQ1 requirements.
6.How does Aetrix verify that TLC5941QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC5941QPWPRQ1 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 TLC5941QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TLC5941QPWPRQ1?
All TLC5941QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5941QPWPRQ1, 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 TLC5941QPWPRQ1 part is unused and in its original packaging.
Return procedure for TLC5941QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5941QPWPRQ1 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
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