My Inquiry
My Account
Texas Instruments TLC59461PWP
- Part No.:
- TLC59461PWP
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC59461PWP.pdf
- Description:
- IC LED DRVR LINEAR 40MA 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,895
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLC59461PWP from Texas Instruments is a 16-channel, 12-bit PWM constant-current LED driver with integrated 6-bit dot correction. It delivers up to 40 mA per channel, supports 30-MHz serial data transfer and 33-MHz grayscale PWM clocking, and operates from 3.0 V to 5.5 V supply. It is used in monochrome and full-color LED signboards requiring precise per-channel brightness calibration.
For engineers reviewing the TLC59461PWP datasheet, TLC59461PWP pinout, TLC59461PWP application, or TLC59461PWP equivalent, key selection criteria include its HTSSOP-28 PowerPAD™ package, open-LED detection (LOD), thermal error flag (TEF), and dual-mode serial interface for grayscale and dot-correction data loading.
Technical Context
The TLC59461PWP implements a 12-bit grayscale PWM counter synchronized to GSCLK (up to 33 MHz) and resets on BLANK assertion. Its 6-bit dot correction register adjusts each output's current from 0% to 100% of IOLCMax, set by a single external resistor on IREF.
It features two independent error detection circuits: continuous LED open detection (LOD) monitoring all 16 channels, and a thermal error flag (TEF) triggered at +150°C junction temperature with +10°C hysteresis. Serial interface uses SIN/SCLK/XLAT with MODE-selectable DC/GS data loading and SOUT daisy-chaining capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 16 independent constant-current sink outputs |
| PWM resolution | 12-bit (4096 grayscale steps) for precise LED intensity control |
| Dot correction | 6-bit (64 steps) per channel to compensate LED brightness variance |
| Max output current | 40 mA per channel, adjustable via external IREF resistor (1.275–12.75 kΩ) |
| Supply voltage | 3.0 V to 5.5 V - compatible with standard logic-level microcontrollers |
| Data rate | 30 MHz SCLK - enables fast refresh of large LED arrays |
| Error flags | Dedicated open-drain XERR output for LOD and TEF reporting |
Pinout & Package
Package: HTSSOP-28 PowerPAD™ with exposed thermal pad (PWP). Requires soldering PowerPAD to PCB copper for rated 3958 mW power dissipation at +25°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for all currents; connects to PCB ground plane |
| BLANK (Pin 2) | Global output disable | Forces all 16 outputs OFF and resets grayscale counter when high |
| XLAT (Pin 3) | Data latch strobe | Rising edge transfers serial data from shift register to dot-correction or grayscale latch |
| SCLK (Pin 4) | Serial clock input | Edge-triggered clock for shifting data into internal 96-bit (DC) or 192-bit (GS) shift register |
| SIN (Pin 5) | Serial data input | MSB-first data stream for dot correction or grayscale configuration |
| MODE (Pin 6) | Function select | High = dot correction mode; Low = grayscale PWM mode |
| OUT0–OUT15 (Pins 7–22) | Constant-current sinks | Each drives one LED cathode; 40 mA max, 1% channel-to-channel accuracy |
| XERR (Pin 23) | Error output | Open-drain signal pulled low on LED open or thermal fault detection |
| SOUT (Pin 24) | Serial data output | Enables daisy-chaining multiple TLC59461PWP devices without external logic |
| GSCLK (Pin 25) | Grayscale clock | Drives 12-bit PWM counter; 33 MHz max frequency defines minimum on-time resolution |
| XHALF (Pin 26) | Extended interface enable | Low activates extended serial protocol for faster data loading |
| IREF (Pin 27) | Current reference | Connects to GND via external resistor to set global IOLCMax (4–40 mA) |
| VCC (Pin 28) | Power supply | 3.0–5.5 V digital and analog supply; powers logic, reference, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel dot correction | 6-bit adjustment (0–100% of max current) corrects LED binning and aging drift |
| Integrated LOD circuit | Detects open-circuit LEDs during active display period without external components |
| Thermal protection | Automatic shutdown via XERR when junction exceeds +150°C, with +10°C hysteresis |
| Daisy-chain capability | SOUT pin allows cascading >100 channels using single MCU SPI interface |
| Noise-reduced timing | 4-channel grouped output delay minimizes simultaneous switching noise on shared VLED rails |
Applications
| LED Signboards | Display Backlighting |
|---|---|
Use Scenario: Outdoor alphanumeric and graphic displays using high-brightness discrete LEDs. IC Role / Device Role / Timing Role: Constant-current sink driver with per-pixel grayscale and dot correction for uniform luminance across large panels. Use Value: Eliminates manual resistor trimming and enables factory calibration of LED brightness variance across 16-channel segments. | Use Scenario: Edge-lit LCD backlight modules requiring local dimming zones. IC Role / Device Role / Timing Role: PWM-controlled current source for LED strings, synchronized to display frame timing via BLANK and GSCLK. Use Value: Achieves >4000:1 contrast ratio through 12-bit grayscale depth while maintaining ±1% channel matching. |
| Monochrome LED Displays | Full-Color RGB Modules |
Use Scenario: Industrial status panels and transportation signage using single-color LEDs. IC Role / Device Role / Timing Role: High-accuracy current sink with LOD fault reporting for safety-critical visibility applications. Use Value: Reduces system-level BOM by integrating open-LED detection, eliminating need for external sense resistors or comparators. | Use Scenario: RGB pixel modules for architectural lighting and stage effects. IC Role / Device Role / Timing Role: Independent 16-channel driver supporting separate R/G/B current tuning per subpixel via dot correction registers. Use Value: Enables white-point stability over temperature and lifetime by calibrating each color channel independently. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5947PWP | 24-channel version; identical 12-bit PWM/6-bit DC architecture; same HTSSOP-28 package | Supports larger LED arrays without daisy-chaining; higher channel count increases layout routing density | Select when >16 channels required per IC to reduce interconnect complexity |
| IS31FL3728-QFLS4-TR | 28-channel, 12-bit PWM; integrated auto-breathing; no dot correction; QFN-40 package | Lacks per-channel DC calibration but adds programmable fade-in/fade-out; requires external current-setting resistors per channel | Select for cost-sensitive consumer lighting where LED binning is tightly controlled and thermal margin is high |
Compared with TLC59461PWP, TLC5947PWP offers higher channel density in identical footprint, while IS31FL3728-QFLS4-TR trades dot correction for integrated animation features and higher pin count - making TLC59461PWP optimal for industrial LED systems demanding precision calibration and fault reporting.
Availability
TLC59461PWP is available at Aetrix Electronics and suitable for LED signboards, display backlighting, and monochrome LED displays requiring stable component supply and long-term production continuity.
Supply support for TLC59461PWP 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 technologies with broad industrial and automotive portfolio coverage.
The TLC59461PWP belongs to TI's LED driver product line, designed specifically for high-precision, multi-channel constant-current LED control in signage and display applications requiring calibration, fault detection, and daisy-chain scalability.
FAQ
What is the maximum LED supply voltage supported by the TLC59461PWP?
The TLC59461PWP supports LED anode supply (VLED) up to +17 V at its OUT0–OUT15 pins. This allows direct driving of common-anode LED strings without external high-voltage transistors, provided the device's VCC remains within 3.0–5.5 V. The absolute maximum rating for OUTn is +18 V, but operation above +17 V violates recommended conditions and risks reliability degradation. The TLC59461PWP maintains 40 mA sink capability across this full range when properly heatsinked.
How does the TLC59461PWP implement LED open detection (LOD)?
The TLC59461PWP performs continuous LED open detection by monitoring voltage at each OUTn pin during active drive periods. When an LED is disconnected or fails open, the corresponding OUTn voltage rises above the 0.3 V LOD threshold (typical), triggering the XERR pin to assert low. LOD operates independently per channel and does not require external components. The TLC59461PWP reports combined LOD/TEF status on XERR; separate identification requires reading Status Information Data (SID) via serial interface after XLAT pulse.
Can the TLC59461PWP be used without dot correction functionality?
Yes, the TLC59461PWP can operate exclusively in grayscale PWM mode by holding MODE low and loading only GS data. Dot correction registers retain their last value but do not affect output current unless MODE is asserted high. For applications with tightly binned LEDs or fixed brightness requirements, omitting dot correction simplifies firmware and reduces serial data overhead. All 16 channels still benefit from the TLC59461PWP's ±1% channel-to-channel current matching and thermal protection regardless of DC usage.
What is the role of the XHALF pin on the TLC59461PWP?
The XHALF pin on the TLC59461PWP enables an extended serial interface mode when driven low. In XHALF = L mode, the device accepts grayscale data at half the normal clock rate (15 MHz max SCLK), allowing longer setup/hold times for marginal MCU interfaces. It also modifies internal timing to reduce noise during data loading. When XHALF = H (default), full-speed 30 MHz operation is enabled. Both modes support identical functionality and register mapping - XHALF is purely a timing adaptation feature, not a functional mode selector like MODE.
How is the maximum output current set on the TLC59461PWP?
The maximum output current (IOLCMax) of the TLC59461PWP is set by an external resistor (RIREF) connected between IREF (Pin 27) and GND. With a typical internal IREF voltage of 1.20 V, RIREF values from 1.275 kΩ to 12.75 kΩ yield IOLCMax from 40 mA down to 4 mA. The relationship is IOLCMax ≈ 42.5 × (1.20 V / RIREF). Currents below 4 mA are unstable; lower effective currents are achieved by combining IOLCMax ≥ 4 mA with dot correction scaling. The TLC59461PWP's IREF pin must not be left floating.
TLC59461PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Last Time Buy
- 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:
- 40mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Backlight, Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TLC59461PWP FAQ
1.How can I place an order for TLC59461PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59461PWP 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 TLC59461PWP reliable?
The price and inventory of TLC59461PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59461PWP is usually 5 days.
3.What payment methods are accepted for TLC59461PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59461PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59461PWP?
TLC59461PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59461PWP 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 TLC59461PWP?
For technical support, including TLC59461PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59461PWP requirements.
6.How does Aetrix verify that TLC59461PWP is sourced from the original manufacturer or authorized distributors?
All TLC59461PWP 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 TLC59461PWP meets industry standards.
7.What is the process for return or replacement of TLC59461PWP?
All TLC59461PWP units undergo pre-shipment inspection (PSI). If there is an issue with TLC59461PWP, 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 TLC59461PWP part is unused and in its original packaging.
Return procedure for TLC59461PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59461PWP 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…
