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Texas Instruments TLC59401RHBR
- Part No.:
- TLC59401RHBR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TLC59401RHBR.pdf
- Description:
- IC LED DRVR LINEAR 120MA 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,047
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Product details
Overview
TLC59401RHBR from Texas Instruments is a 16-channel, constant-current LED driver IC with integrated 12-bit grayscale PWM control (4096 steps) and 6-bit dot correction (64 steps), supporting up to 120 mA per channel at VCC > 3.6 V and featuring LED open detection (LOD), thermal error flag (TEF), and serial daisy-chain capability. It operates across 3.0–5.5 V supply and drives LEDs with output voltage up to 17 V, widely used in full-color LED signage and display back-lighting systems.
For engineers reviewing the TLC59401RHBR datasheet, TLC59401RHBR pinout, TLC59401RHBR application, or TLC59401RHBR equivalent, key selection considerations include its QFN-32 package, IREF-based current programming, MODE-selectable GS/DC register loading, BLANK-controlled global output enable, and XERR open-drain error reporting for system-level fault monitoring.
Technical Context
The TLC59401RHBR implements 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 6-bit per-channel current trimming. Grayscale timing is synchronized to external GSCLK (up to 30 MHz), while serial data is shifted in via SIN/SCLK (also up to 30 MHz) and latched by XLAT.
It features hardware-level error detection: LOD triggers when OUTn voltage falls below 0.3 V (indicating open LED), and TEF activates at junction temperature ≥150°C. Both errors drive the open-drain XERR pin low and are latched into a status register readable via SOUT during serial readback.
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-step) PWM control per channel - enables smooth brightness gradation in high-fidelity LED displays |
| Dot correction | 6-bit (64-step) per-channel current adjustment - compensates for LED binning and PCB trace mismatch |
| Max sink current | 120 mA per channel at VCC > 3.6 V - supports high-brightness LEDs without external boost circuitry |
| Serial interface | 30 MHz SCLK, 192-bit (GS) or 96-bit (DC) shift register - enables fast frame updates and cascaded multi-device control |
| Error reporting | Open-drain XERR pin indicating LOD or TEF - allows wired-OR fault aggregation across multiple TLC59401RHBRs |
| Operating voltage | VCC = 3.0–5.5 V; output voltage range up to 17 V - compatible with standard logic supplies and high-Vf LED strings |
Pinout & Package
32-pin 5 mm × 5 mm QFN package with exposed thermal pad (RHB suffix); RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT15 | Constant-current sink outputs | 16 individually adjustable current sinks; support parallel connection to increase drive capability |
| IREF | Reference current input | Single external resistor sets max channel current (Imax = 31.5 × VIREF/RIREF, VIREF = 1.24 V) |
| XLAT | Register latch control | Level-triggered input: high pulse transfers serial data to GS or DC register depending on MODE state |
| MODE | Operating mode select | GND = GS mode (192-bit data); VCC = DC mode (96-bit data) - determines shift register length and target register |
| BLANK | Global output disable | Active-high signal forces all OUTn OFF and resets grayscale counter - enables flicker-free frame blanking |
| XERR | Error flag output | Open-drain output pulled low on LOD or TEF detection - supports shared fault bus with single pull-up |
| SIN / SOUT / SCLK / GSCLK | Serial interface signals | Enable daisy-chained configuration; SOUT of one device connects to SIN of next for scalable LED matrix control |
Key Features
| Feature | Design Value |
|---|---|
| Graduated output delay | 20 ns step between consecutive OUTn (0–300 ns total) - reduces inrush current and minimizes bypass capacitor requirements |
| LED open detection (LOD) | Detects open-circuit condition per channel when OUTn voltage < 0.3 V during active drive - prevents false brightness errors in signage |
| Thermal error flag (TEF) | Triggers at junction temperature ≥150°C - protects against thermal runaway in high-density LED arrays |
| Controlled inrush current | Internal current ramp and staggered turn-on - eliminates voltage droop on shared VCC rails during power-up or frame transitions |
| Status register readback | LOD/TEF flags and DC data accessible via SOUT after XLAT pulse - enables real-time diagnostics without additional GPIO |
Applications
| LED Signage Control | Full-Color Video Wall Driver |
|---|---|
|
Use Scenario: Driving monochrome or RGB LED modules in outdoor advertising signs with variable ambient lighting. IC Role / Device Role / Timing Role: Constant-current sink providing precise 12-bit grayscale PWM per channel and 6-bit per-LED dot correction to compensate for aging and manufacturing variance. Use Value: Ensures uniform luminance across thousands of LEDs despite batch-to-batch LED forward voltage drift and thermal gradients. |
Use Scenario: Pixel-level brightness control in large-format indoor video walls using surface-mount RGB LED packages. IC Role / Device Role / Timing Role: Serially cascaded TLC59401RHBRs deliver synchronized 4096-step grayscale updates at 60+ Hz frame rates via shared GSCLK and BLANK. Use Value: Eliminates visible banding or column artifacts through hardware-staggered output delays and per-channel current trimming. |
| Automotive Display Backlight | Industrial Panel Indicator Array |
|
Use Scenario: Dynamic backlight dimming for TFT instrument clusters requiring AEC-Q100-aligned reliability and thermal robustness. IC Role / Device Role / Timing Role: LED driver with integrated TEF and LOD reporting, interfaced to MCU over SPI-like serial bus with fault-aware firmware handling. Use Value: Enables fail-safe operation: XERR assertion halts backlight update and triggers dashboard warning before thermal shutdown occurs. |
Use Scenario: Status indication on factory HMIs using discrete high-intensity LEDs arranged in custom patterns. IC Role / Device Role / Timing Role: Compact QFN-32 solution replacing discrete transistor arrays and current-setting resistors for 16 independent indicators. Use Value: Reduces BOM count by 30+ components per board while enabling software-tunable brightness and diagnostic visibility via SOUT. |
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, but uses SPI-compatible 4-wire interface (not shift-register based); no XERR pin | Lacks hardware LOD/TEF reporting and daisy-chain simplicity; requires dedicated SPI peripheral instead of GPIO bit-banging | Choose when higher channel density is needed and system has SPI resources; avoid if XERR fault aggregation or legacy serial topology is required |
| IS31FL3731-QFLS4-TR | 18-channel, 8-bit PWM only (no dot correction), integrated auto-breathing, I²C interface, lower max current (40 mA) | No per-channel current trimming; relies on external calibration or tighter LED binning; simpler firmware integration | Choose for cost-sensitive consumer HMI where fine-grained brightness matching is less critical than ease of I²C integration |
Compared with TLC59401RHBR, TLC5947RGER offers more channels but removes the diagnostic XERR and serial daisy-chain flexibility, while IS31FL3731-QFLS4-TR simplifies control with I²C yet sacrifices both dot correction precision and fault visibility-making TLC59401RHBR optimal for industrial signage demanding per-LED calibration and system-level error awareness.
Availability
TLC59401RHBR is available at Aetrix Electronics and suitable for LED signage, automotive display backlighting, and industrial panel indicator arrays requiring stable component supply, long-term manufacturability, and consistent thermal performance across extended temperature ranges.
Supply support for TLC59401RHBR 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 ICs, with decades of expertise in power management and LED driver innovation.
The TLC59401RHBR belongs to TI's precision LED driver product line, engineered specifically for high-fidelity, high-channel-count LED visual systems where grayscale accuracy, per-pixel current matching, and real-time fault detection are mission-critical.
FAQ
What is the maximum output current per channel for the TLC59401RHBR?
The TLC59401RHBR supports up to 120 mA per channel when VCC exceeds 3.6 V, set precisely 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 constant and thermally regulated, with ±4% typical channel-to-channel matching across temperature and supply variations.
How does the TLC59401RHBR implement dot correction and grayscale control?
The TLC59401RHBR uses two independent registers: a 192-bit grayscale (GS) register for 12-bit PWM brightness control and a 96-bit dot correction (DC) register for 6-bit per-channel current scaling. GS data defines on-time duration; DC data scales the sink current magnitude. Both are loaded serially via SIN/SCLK and latched by XLAT, with MODE pin selecting register type.
What package type is used for the TLC59401RHBR?
The TLC59401RHBR uses a 32-pin, 5 mm × 5 mm QFN package (RHB suffix) with an exposed thermal pad. This RoHS-compliant package provides low thermal resistance (35.9 °C/W) when soldered to PCB copper, enabling reliable operation at full 120 mA/channel load in compact LED driver designs.
Can multiple TLC59401RHBR devices be connected together?
Yes, the TLC59401RHBR supports seamless daisy-chaining: connect SOUT of one device to SIN of the next, sharing SCLK, XLAT, BLANK, and GSCLK. Cascaded devices retain independent LOD/TEF reporting via individual XERR pins or shared wired-OR bus, enabling scalable control of hundreds of LEDs with minimal MCU GPIO usage.
What error conditions does the TLC59401RHBR detect and report?
The TLC59401RHBR detects two hardware faults: LED Open Detection (LOD), triggered when an output voltage drops below 0.3 V under active drive; and Thermal Error Flag (TEF), activated at junction temperature ≥150°C. Both assert the open-drain XERR pin low and are latched into a status register readable via SOUT for diagnostic firmware polling.
TLC59401RHBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-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:
- 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:
- 32-VQFN (5x5)
TLC59401RHBR FAQ
1.How can I place an order for TLC59401RHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59401RHBR 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 TLC59401RHBR reliable?
The price and inventory of TLC59401RHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59401RHBR is usually 5 days.
3.What payment methods are accepted for TLC59401RHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59401RHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59401RHBR?
TLC59401RHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59401RHBR 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 TLC59401RHBR?
For technical support, including TLC59401RHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59401RHBR requirements.
6.How does Aetrix verify that TLC59401RHBR is sourced from the original manufacturer or authorized distributors?
All TLC59401RHBR 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 TLC59401RHBR meets industry standards.
7.What is the process for return or replacement of TLC59401RHBR?
All TLC59401RHBR units undergo pre-shipment inspection (PSI). If there is an issue with TLC59401RHBR, 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 TLC59401RHBR part is unused and in its original packaging.
Return procedure for TLC59401RHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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