My Inquiry
My Account
Texas Instruments TLC59281DBQ
- Part No.:
- TLC59281DBQ
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
TLC59281DBQ.pdf
- Description:
- IC LED DRIVER LINEAR 35MA 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:219
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLC59281DBQ from Texas Instruments is a 16-channel constant-current LED sink driver in SSOP-24 package, delivering precise 2–35 mA per channel with ±1% channel-to-channel current matching and 35-MHz serial data rate. It operates from 3.0 V to 5.5 V supply and supports LED power rails up to 17 V, enabling high-brightness video display pixel control.
For engineers reviewing the TLC59281DBQ datasheet, TLC59281DBQ pinout, TLC59281DBQ application, or TLC59281DBQ equivalent, key selection criteria include BLANK pulse width (20 ns), output switching transient time (10 ns), IREF resistor-based current programming, and daisy-chainable serial interface for scalable LED matrix control.
Technical Context
The TLC59281DBQ implements a 16-bit shift register followed by a parallel latch, accepting serial data via SIN/SCLK and updating outputs on LAT rising edge. Its constant-current sink architecture uses an external IREF resistor to set all 16 channels identically, with internal reference voltage of 1.20 V (±0.04 V).
It features CMOS-level inputs, 10-ns high-speed switching, and simultaneous channel turn-on/off to minimize on-time error (±8 ns). BLANK forces all outputs off independently of latch state, supporting precise PWM dimming without data corruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 5.5 V - compatible with standard logic supply rails and tolerant of common industrial voltage variation |
| Output Current | 2 mA to 35 mA per channel - programmable via single external IREF resistor (1.44 kΩ to 25.2 kΩ) |
| Channel Matching | ±1% (channel-to-channel) - ensures uniform LED brightness across 16 outputs without per-channel calibration |
| Data Rate | 35 MHz SCLK - enables full 16-bit update in ≤457 ns, supporting high-refresh-rate displays |
| BLANK Pulse Width | 20 ns minimum - allows sub-microsecond blanking for high-resolution time-multiplexed LED scanning |
| Operating Temp | –40°C to +85°C - qualified for industrial and outdoor signage environments |
| Output Voltage Max | 17 V - supports common white/blue LED strings and higher-Vf configurations |
Pinout & Package
Package: SSOP-24 (DBQ), 0.635 mm pitch, thermal pad not internally connected to GND - requires external PCB grounding for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference for all internal circuitry and output sinks |
| 2 | SIN | Serial data input - shifts LSB-first into 16-bit shift register on SCLK rising edge |
| 3 | SCLK | Serial clock input - Schmitt-triggered, synchronizes data shift and SOUT update |
| 4 | LAT | Latch enable - transfers shift register contents to output latch on rising edge; must be pulsed once per update |
| 5–20 | OUT0–OUT15 | Constant-current sink outputs - each independently controlled by latch bit; rated for 40 mA DC max |
| 21 | BLANK | Global output disable - forces all OUTn off when high, overriding latch state |
| 22 | SOUT | Serial data output - MSB of shift register, enables daisy-chaining multiple TLC59281 devices |
| 23 | IREF | Current reference node - connects to external resistor to GND to set all 16 output currents |
| 24 | VCC | Supply voltage input - powers logic and output drivers; decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel constant-current sink | Enables uniform brightness across large LED arrays without individual current-setting components |
| Single-resistor current programming | Eliminates 16 discrete current-setting resistors; simplifies BOM and improves thermal tracking |
| 20-ns BLANK pulse width | Supports >5 MHz blanking frequency for high-fidelity time-multiplexed LED video with minimal ghosting |
| Daisy-chainable serial interface | Reduces MCU GPIO count - one SIN/SCLK/LAT/BLANK pair controls unlimited cascaded drivers |
| ±1% channel-to-channel accuracy | Guarantees <1% luminance variation across pixels, critical for professional-grade video walls |
Applications
| LED Video Display | Message Board |
|---|---|
Use Scenario: High-resolution indoor LED video wall with 16×N pixel modules per driver IC. IC Role / Device Role / Timing Role: Pixel-level constant-current sink controlling red/green/blue LEDs per module segment. Use Value: 35-mA per-channel drive and ±1% matching ensure consistent color point and brightness across entire display surface. |
Use Scenario: Outdoor alphanumeric message board using multiplexed 7-segment or dot-matrix characters. IC Role / Device Role / Timing Role: Row/column scan driver providing synchronized current sink for time-multiplexed segments. Use Value: 20-ns BLANK pulse enables clean row blanking at >1 kHz scan rates, eliminating crosstalk and flicker. |
| Illumination Control | Architectural Lighting |
Use Scenario: Programmable RGBW linear lighting strip with per-zone intensity control. IC Role / Device Role / Timing Role: Channel-isolated current sink enabling independent dimming of adjacent LED groups. Use Value: 35-MHz data rate allows real-time dynamic color transitions across hundreds of zones via daisy-chained configuration. |
Use Scenario: Facade lighting system requiring synchronized multi-color LED clusters across building surfaces. IC Role / Device Role / Timing Role: Distributed current sink node in master-slave topology, driven by central controller. Use Value: Simultaneous 16-output switching minimizes timing skew between adjacent fixtures, preserving lighting rhythm integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-channel constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940QPWPR | Integrated grayscale PWM (12-bit), no external IREF; higher pin count (28-TSSOP); 17 V output max | Preferred where per-channel PWM dimming is required instead of external PWM via BLANK | Select TLC5940QPWPR when fine-grained intensity control per channel is needed; TLC59281DBQ suits simpler on/off + global PWM systems |
| MAX7219CWG+ | 8-channel, integrated SPI interface, 5.5 V max VCC, 40 V output max; includes scan-limiting and decode logic | Better suited for 7-segment numeric displays than full-color video matrices | Choose MAX7219CWG+ for legacy numeric/matrix displays with built-in decoding; TLC59281DBQ fits modern high-current RGB video applications |
Compared with TLC5940QPWPR and MAX7219CWG+, the TLC59281DBQ delivers higher per-channel current (35 mA vs ≤20 mA), faster data rate (35 MHz vs ≤10 MHz), and lower system-level component count due to single-resistor current setting - making it optimal for cost-sensitive, high-brightness video display designs.
Availability
TLC59281DBQ is available at Aetrix Electronics and suitable for LED video displays, message boards, architectural lighting, and industrial illumination systems requiring stable component supply and long-term production continuity.
Supply support for TLC59281DBQ 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 silicon solutions for industrial, automotive, and consumer markets.
The TLC59281DBQ belongs to TI's LED driver product line, engineered specifically for high-channel-count, constant-current LED matrix control in commercial signage and video applications demanding precision, speed, and scalability.
FAQ
What is the maximum LED supply voltage supported by the TLC59281DBQ?
The TLC59281DBQ supports LED power-supply voltages up to 17 V at its OUT0–OUT15 pins. This rating allows direct connection to common white and blue LED strings without intermediate voltage translation, provided the voltage difference between VCC and VLED does not exceed device limits. The absolute maximum output voltage is 18 V, but operation at 17 V is specified across the full temperature range.
How is output current programmed on the TLC59281DBQ?
Output current on the TLC59281DBQ is set by a single external resistor (RIREF) connected between the IREF pin and GND. The nominal relationship is IOUT = 42 × (1.20 V / RIREF), yielding 35 mA at 1.44 kΩ and 2 mA at 25.2 kΩ. The IREF pin provides a stable 1.20 V (±0.04 V) reference, ensuring predictable current scaling across temperature and unit variance.
Can multiple TLC59281DBQ devices be connected in series?
Yes, the TLC59281DBQ supports daisy-chaining via its SIN and SOUT pins. Serial data enters the first device at SIN, propagates through its 16-bit shift register, and exits at SOUT to feed SIN of the next device. A single SCLK and LAT signal updates all cascaded devices simultaneously, enabling scalable control of hundreds of LED channels with minimal MCU interface lines.
What is the purpose of the BLANK pin on the TLC59281DBQ?
The BLANK pin on the TLC59281DBQ forces all 16 output channels into high-impedance off-state regardless of latch data, acting as a hardware-level global disable. With a minimum pulse width of 20 ns, it enables precise frame blanking in time-multiplexed LED systems. Unlike software-based blanking, BLANK guarantees zero current flow during its active period, eliminating residual glow and timing jitter.
Does the TLC59281DBQ require external pull-up or pull-down resistors on its control pins?
No, the TLC59281DBQ features Schmitt-triggered inputs on SCLK, LAT, and BLANK, and standard CMOS inputs on SIN, eliminating the need for external biasing resistors. All control pins (SIN, SCLK, LAT, BLANK) are fully compatible with 3.3 V or 5 V logic levels and exhibit rail-to-rail input voltage tolerance (–0.3 V to VCC + 0.3 V), simplifying interface design with microcontrollers and FPGAs.
TLC59281DBQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 35mA
- Frequency:
- 35MHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
TLC59281DBQ FAQ
1.How can I place an order for TLC59281DBQ through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59281DBQ 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 TLC59281DBQ reliable?
The price and inventory of TLC59281DBQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59281DBQ is usually 5 days.
3.What payment methods are accepted for TLC59281DBQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59281DBQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59281DBQ?
TLC59281DBQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59281DBQ 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 TLC59281DBQ?
For technical support, including TLC59281DBQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59281DBQ requirements.
6.How does Aetrix verify that TLC59281DBQ is sourced from the original manufacturer or authorized distributors?
All TLC59281DBQ 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 TLC59281DBQ meets industry standards.
7.What is the process for return or replacement of TLC59281DBQ?
All TLC59281DBQ units undergo pre-shipment inspection (PSI). If there is an issue with TLC59281DBQ, 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 TLC59281DBQ part is unused and in its original packaging.
Return procedure for TLC59281DBQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59281DBQ 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…
