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Texas Instruments TLC59401PWPR
- Part No.:
- TLC59401PWPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC59401PWPR.pdf
- Description:
- IC LED DRVR LIN 120MA 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,859
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Product details
Overview
TLC59401PWPR 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), and LED open detection. It delivers up to 120 mA per channel at VCC > 3.6 V, supports 30 MHz serial data transfer, and operates across –40°C to +85°C for full-color LED signage and display backlighting.
For engineers reviewing the TLC59401PWPR datasheet, TLC59401PWPR pinout, TLC59401PWPR application, or TLC59401PWPR equivalent, key selection considerations include its HTSSOP-28 PowerPAD™ package, IREF-based current programming, dual-mode serial interface (GS/DC), thermal error flag (TEF), and open-drain XERR reporting of LOD/TEF faults.
Technical Context
The TLC59401PWPR implements a dual-register architecture: a 192-bit grayscale (GS) register for per-channel 12-bit PWM brightness control and a 96-bit dot correction (DC) register for per-channel 6-bit current scaling. Grayscale timing is synchronized to GSCLK (up to 30 MHz), while serial data loading uses SCLK (also up to 30 MHz) with MSB-first, level-triggered XLAT latching.
It features hardware-level fault monitoring: LED open detection (LOD) triggers when OUTn voltage drops below 0.3 V under active drive, and thermal error flag (TEF) activates at junction temperature ≥160°C typical. Both faults assert the open-drain XERR output, which can be wire-OR'd across multiple devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 5.5 V - Supports standard logic supply rails and ensures compatibility with 3.3 V and 5 V microcontrollers. |
| Max Output Current | 120 mA per channel (VCC > 3.6 V) - Set precisely via external IREF resistor; enables direct drive of high-brightness LEDs without external boosters. |
| Grayscale Resolution | 12-bit (4096 steps) - Enables smooth, flicker-free dimming and high-fidelity color mixing in RGB LED arrays. |
| Dot Correction | 6-bit (64 steps) - Compensates for LED-to-LED forward voltage and aging variations to achieve uniform luminance across 16 channels. |
| Data Rate | 30 MHz SCLK - Allows full 192-bit GS data load in ≤6.4 µs, minimizing blanking time and enabling high-refresh-rate displays. |
| Output Voltage Range | –0.3 V to 18 V - Supports LED strings with up to ~17 V forward voltage, accommodating multi-LED series configurations. |
| Thermal Threshold | TEF trips at +160°C typical - Provides overtemperature protection without requiring external thermal sensors or firmware polling. |
Pinout & Package
Package: 28-pin HTSSOP PowerPAD™ (PWP) with exposed thermal pad - optimized for high-current thermal dissipation (31.58°C/W with soldered PowerPAD).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT15 | Constant-current sink outputs | 16 individually controlled, current-regulated channels; each capable of sinking up to 120 mA; supports parallel connection for higher current. |
| IREF | Reference current input | Single external resistor sets all 16 channel max currents (Imax = 31.5 × VIREF/RIREF, VIREF = 1.24 V typical). |
| SIN / SOUT | Serial data input/output | Daisy-chainable interface: SIN accepts 96-bit (DC mode) or 192-bit (GS mode) data; SOUT echoes status bits or cascades to next device. |
| SCLK / XLAT / GSCLK | Clock and latch inputs | SCLK shifts data; XLAT latches into GS/DC registers (level-triggered); GSCLK drives grayscale PWM counter - all CMOS-compatible. |
| BLANK | Global output enable | Active-high signal forces all OUTn OFF and resets GS counter - used for frame blanking, PWM dimming, or fault recovery. |
| XERR | Open-drain error flag | Asserts low on LOD or TEF; supports wired-OR across multiple TLC59401PWPRs with single pull-up for system-level fault reporting. |
| MODE | Operating mode select | GND = GS mode (192-bit grayscale load); VCC = DC mode (96-bit dot correction load) - determines shift register width and XLAT function. |
Key Features
| Feature | Design Value |
|---|---|
| Graduated output delay | 20 ns step between adjacent channels (0–300 ns total) - reduces inrush current and eases bypass capacitor sizing during simultaneous turn-on. |
| Controlled inrush current | Internally limited dI/dt during channel activation - prevents supply rail droop and EMI spikes in dense LED arrays. |
| Status information readback | LOD/TEF flags and DC data accessible via SOUT during serial read cycle - enables real-time diagnostics without additional GPIO. |
| CMOS-level I/O | All digital pins compatible with 3.3 V and 5 V logic families - eliminates level-shifting requirements in mixed-voltage systems. |
| LED open detection threshold | 0.3 V typical at OUTn - reliably identifies open-circuit LEDs even under low-current dot-corrected operation. |
Applications
| RGB Full-Color Signage | Monochrome LED Display Panels |
|---|---|
|
Use Scenario: Driving 16×16 or 32×16 pixel modules in outdoor advertising signs with ambient light compensation and long-term luminance uniformity. IC Role / Device Role / Timing Role: Constant-current sink for red/green/blue LED strings; provides per-pixel 12-bit grayscale and per-channel 6-bit dot correction via serial interface. Use Value: Eliminates manual binning and external current-setting resistors; achieves <±4% channel-to-channel current matching across temperature (–40°C to +85°C). |
Use Scenario: Backlighting for industrial HMIs and medical displays requiring precise brightness grading and fail-safe LED monitoring. IC Role / Device Role / Timing Role: Primary LED driver with BLANK-synchronized PWM dimming and real-time LOD fault reporting via XERR. Use Value: Reduces BOM count by integrating current regulation, grayscale, dot correction, and fault detection in one 28-pin package. |
| Architectural LED Accent Lighting | Stage & Entertainment Pixel Mapping |
|
Use Scenario: Controlling linear LED strips in commercial interiors where consistent color temperature and minimal visible stepping are critical. IC Role / Device Role / Timing Role: 16-channel current sink with daisy-chained SOUT→SIN configuration; GSCLK synchronized to master timing controller. Use Value: 30 MHz data rate enables sub-millisecond frame updates; graduated output delay suppresses audible coil whine in inductive LED drivers. |
Use Scenario: Pixel-level intensity control in moving-head fixtures and LED video walls requiring high-speed reconfiguration and thermal safety. IC Role / Device Role / Timing Role: Real-time grayscale update engine with TEF-triggered automatic brightness rollback to prevent thermal runaway. Use Value: On-die thermal flag (TEF) avoids need for external thermistors or firmware polling; XERR simplifies fault bus wiring in large-scale installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5947RTQR | 24-channel, QFN-32, same GS/DC architecture but higher channel count and no LOD/TEF reporting on XERR. | Lacks integrated LED open and thermal fault flags - requires external monitoring circuitry for safety-critical lighting. | Select when expanding channel density beyond 16 and thermal/LOD reporting is handled at system level. |
| IS31FL3731-QFLS4-TR | 16-channel, 28-pin QFN, I²C interface, built-in auto-breathing, but only 8-bit grayscale (256 steps) and no dot correction. | Software-configurable via I²C instead of SPI-like serial interface; lacks per-channel current trimming capability. | Select for simpler MCU integration where 8-bit dimming suffices and uniformity is managed optically or in firmware. |
Compared with TLC59401PWPR, TLC5947RTQR offers more channels but removes fault visibility, while IS31FL3731-QFLS4-TR trades resolution and trimming for ease of I²C control - TLC59401PWPR remains optimal for high-fidelity, fault-aware, 16-channel LED systems requiring hardware-level uniformity correction.
Availability
TLC59401PWPR is available at Aetrix Electronics and suitable for RGB signage, display backlighting, and architectural LED systems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TLC59401PWPR 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 decades of expertise in precision analog IC design and high-reliability manufacturing.
The TLC59401PWPR belongs to TI's high-performance LED driver product line, engineered specifically for professional-grade visual displays demanding tight current matching, integrated diagnostics, and robust serial control in space-constrained designs.
FAQ
What is the maximum output current per channel for the TLC59401PWPR?
The TLC59401PWPR supports up to 120 mA per channel when VCC exceeds 3.6 V, set by an external resistor on the IREF pin (Imax = 31.5 × 1.24 V / RIREF). At VCC ≤ 3.6 V, the limit is 80 mA. This current is actively regulated and maintains ±4% matching across all 16 channels over temperature.
How does the TLC59401PWPR implement dot correction?
The TLC59401PWPR uses a dedicated 96-bit dot correction (DC) register - 6 bits per channel - to scale each OUTn's current from 0% to 100% of Imax. DC data is loaded in MODE = VCC state via 96-bit serial shift; the TEST pin must be tied to VCC for correct DC circuit operation.
What fault conditions trigger the XERR pin on the TLC59401PWPR?
The XERR pin on the TLC59401PWPR goes low for two independent fault conditions: LED open detection (LOD), when an active output's voltage falls below 0.3 V, and thermal error flag (TEF), when junction temperature exceeds +160°C typical. Both faults are reported on the same open-drain output.
Can multiple TLC59401PWPR devices be cascaded, and how?
Yes - TLC59401PWPR devices support daisy-chaining: connect SOUT of one device to SIN of the next. Data is shifted through the chain using shared SCLK and XLAT; GSCLK remains local. Cascading preserves full 12-bit grayscale and 6-bit dot correction across all devices without additional control lines.
What is the purpose of the MODE pin on the TLC59401PWPR?
The MODE pin selects the TLC59401PWPR's serial interface mode: grounded for 192-bit grayscale (GS) data loading, or pulled to VCC for 96-bit dot correction (DC) data loading. It configures the internal shift register width and determines which register (GS or DC) receives data upon XLAT assertion.
TLC59401PWPR 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:
- 120mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Backlight, Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TLC59401PWPR FAQ
1.How can I place an order for TLC59401PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59401PWPR 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 TLC59401PWPR reliable?
The price and inventory of TLC59401PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59401PWPR is usually 5 days.
3.What payment methods are accepted for TLC59401PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59401PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59401PWPR?
TLC59401PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59401PWPR 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 TLC59401PWPR?
For technical support, including TLC59401PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59401PWPR requirements.
6.How does Aetrix verify that TLC59401PWPR is sourced from the original manufacturer or authorized distributors?
All TLC59401PWPR 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 TLC59401PWPR meets industry standards.
7.What is the process for return or replacement of TLC59401PWPR?
All TLC59401PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TLC59401PWPR, 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 TLC59401PWPR part is unused and in its original packaging.
Return procedure for TLC59401PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59401PWPR Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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