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Texas Instruments TLC59281RGER
- Part No.:
- TLC59281RGER
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TLC59281RGER.pdf
- Description:
- IC LED DRIVER LINEAR 35MA 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,658
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Product details
Overview
TLC59281RGER from Texas Instruments is a 16-channel constant-current LED sink driver in a 24-pin QFN package, delivering up to 35 mA per channel with ±1% channel-to-channel current accuracy, 35-MHz serial data rate, and 10-ns switching transient time. It operates from 3.0 V to 5.5 V supply and supports LED power-supply voltages up to 17 V, enabling high-brightness video display and message board applications.
For engineers reviewing the TLC59281RGER datasheet, TLC59281RGER pinout, TLC59281RGER application, or TLC59281RGER equivalent, key selection considerations include its daisy-chainable serial interface (SIN/SCLK/LAT/BLANK), external IREF resistor-based current setting, thermal-pad-equipped QFN-24 package, and BLANK pulse width tolerance of 20 ns for precise PWM dimming control.
Technical Context
The TLC59281RGER implements a 16-bit shift register followed by a parallel latch to control on/off states of all 16 constant-current sinks independently. Its internal reference voltage (1.20 V typical at IREF) sets output current via an external resistor, with line regulation of ±0.5%/V and load regulation of ±1%/V across 1–3 V output swing.
It features CMOS-level I/O compatibility, 20-ns minimum BLANK pulse width for high-frequency blanking, and propagation delays under 30 ns from LAT/BLANK edges to output current transition-enabling tight synchronization in multi-device LED arrays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 independent constant-current sink outputs (OUT0–OUT15) |
| Max sink current | 35 mA per channel - sufficient for driving high-brightness LEDs without external current-limiting resistors |
| Current accuracy | ±1% channel-to-channel - ensures uniform LED brightness across all 16 channels |
| Data rate | 35 MHz SCLK - enables fast refresh of large LED matrices with minimal serial overhead |
| Supply range | VCC = 3.0 V to 5.5 V - compatible with standard logic rails and low-power microcontrollers |
| LED voltage support | Up to 17 V at outputs - allows direct connection to common LED strings without level-shifting |
| Operating temp | –40°C to +85°C - suitable for industrial and outdoor signage environments |
Pinout & Package
Package: 24-pin VQFN (RGE), 4 mm × 4 mm, 0.5 mm pitch, with exposed thermal pad (not internally connected to GND; must be externally tied to PCB ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SIN (Pin 23) | Serial data input | Accepts LSB-first 16-bit on/off data stream synchronized to SCLK rising edge |
| SCLK (Pin 24) | Serial clock input | Drives 16-bit shift register; Schmitt-triggered for noise immunity |
| LAT (Pin 1) | Latch enable input | Rising edge transfers shift register contents to output latch; must be pulsed once per update |
| BLANK (Pin 18) | Global output disable | High level forces all 16 outputs OFF instantly-used for PWM dimming and fault shutdown |
| IREF (Pin 20) | Current reference terminal | Connects to external resistor to GND; sets all 16 channel currents via 1.20 V internal reference |
| SOUT (Pin 19) | Serial data output | Daisy-chains to SIN of next device; outputs MSB of shift register on SCLK rising edge |
| OUT0–OUT15 (Pins 2–17) | Constant-current sink outputs | Each provides programmable 2–35 mA sink; can be paralleled for higher current per LED |
| VCC (Pin 21) | Power supply | 3.0–5.5 V digital and analog supply; powers logic and current drivers |
| GND (Pin 22) | Ground reference | Common return for VCC, IREF, and all OUTx sinks; requires low-inductance PCB routing |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel constant-current sink | Enables uniform brightness across large LED arrays without per-channel resistors or calibration |
| 35-MHz serial interface | Reduces microcontroller GPIO usage and supports real-time updates of >1000 LEDs per second |
| 20-ns BLANK pulse width | Supports high-frequency PWM dimming (>50 kHz) to eliminate visible flicker in video displays |
| ±1% channel-to-channel accuracy | Minimizes luminance variation between adjacent LEDs in pixelated signage and panels |
| Thermal-pad QFN-24 package | Improves power dissipation capability (3106 mW max at 25°C) for sustained full-brightness operation |
Applications
| LED Video Displays | Message Boards |
|---|---|
Use Scenario: High-resolution indoor/outdoor LED video walls requiring synchronized, flicker-free frame updates. IC Role / Device Role / Timing Role: Constant-current sink driver controlling individual red/green/blue subpixels with precise current matching and fast BLANK-controlled blanking. Use Value: Enables 10-bit+ grayscale depth via PWM while maintaining ±1% brightness uniformity across thousands of LEDs. | Use Scenario: Public information displays (transportation, retail) needing reliable, long-life LED illumination with remote brightness control. IC Role / Device Role / Timing Role: Serially controlled LED driver managing segmented alphanumeric characters or icon arrays using daisy-chained TLC59281RGER units. Use Value: Reduces system wiring complexity and MCU resource load via single-SPI-like interface with no external current-setting components. |
| Illumination Systems | Architectural Lighting |
Use Scenario: Linear LED strips and panel lighting where consistent lumen output and thermal stability are critical. IC Role / Device Role / Timing Role: Constant-current regulator providing stable 35 mA per channel over temperature (–40°C to +85°C) and supply variation. Use Value: Eliminates forward-voltage drift effects across LED batches, ensuring color point consistency in white-light fixtures. | Use Scenario: Dynamic RGBW façade lighting with programmable color mixing and smooth intensity transitions. IC Role / Device Role / Timing Role: Channel-isolated sink driver enabling independent current control per R/G/B/W LED string in multi-color modules. Use Value: Supports 35 mA per channel at up to 17 V LED string voltage-compatible with common 3–5 LED series configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59282RGER | Same 24-pin QFN package; adds error flag (ERROR pin) and read-back capability (READ pin); identical current specs and timing | Required when system-level fault detection or output state verification is needed beyond basic open-load detection | Select TLC59282RGER if diagnostic feedback or closed-loop validation of LED status is required in safety-critical or maintenance-sensitive installations |
| MAX7219CWG+ | 8-channel, multiplexed LED driver with integrated scan controller; different architecture (no daisy-chain SOUT); 5.5 V max VLED | Better suited for 7-segment or dot-matrix displays with built-in decoding; not appropriate for high-current, non-multiplexed LED strings | Choose MAX7219CWG+ only for compact numeric/alphanumeric displays where integrated digit scanning reduces MCU firmware overhead |
Compared with TLC59282RGER, the TLC59281RGER offers simpler control and lower cost where diagnostics are unnecessary; versus MAX7219CWG+, it delivers double the channel count, higher per-channel current, and greater LED string voltage headroom-making it superior for direct-drive, high-brightness linear and area lighting.
Availability
TLC59281RGER is available at Aetrix Electronics and suitable for LED video displays, message boards, and architectural illumination requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for TLC59281RGER 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 for industrial, automotive, and consumer systems.
The TLC59281 product line was designed specifically for high-accuracy, high-speed LED current control in commercial signage and professional display equipment-emphasizing daisy-chain scalability, thermal robustness, and tight current matching.
FAQ
What is the maximum LED string voltage supported by the TLC59281RGER?
The TLC59281RGER supports output voltages up to 17 V at each OUTx pin, allowing direct connection to LED strings containing up to five standard white LEDs (3.2 V VF each) or six red LEDs (2.1 V VF each) without additional voltage translation. This rating is specified in the Absolute Maximum Ratings table and confirmed across operating conditions in the Recommended Operating Conditions section of the datasheet.
How is output current set on the TLC59281RGER?
Output current on the TLC59281RGER is set by an external resistor (RIREF) connected between the IREF pin and GND. The internal 1.20 V reference voltage develops across RIREF, yielding a sink current of IOUT = 42 × (1.20 V / RIREF). For example, a 1.44 kΩ resistor sets nominal 35 mA per channel. This relationship is defined in the DETAILED DESCRIPTION section and validated in Figure 10 and Table 1 of the datasheet.
Does the TLC59281RGER require a heat sink in typical operation?
The TLC59281RGER does not require an external heat sink when operated within its specified power limits: at TA = +25°C, its QFN-24 package supports up to 3106 mW dissipation (24.8 mW/°C derating). With all 16 channels delivering 35 mA into 5 V loads, total power dissipation is ~2.8 W-within safe limits if the PCB includes adequate copper area connected to the thermal pad. Thermal design guidance is provided in the Layout Considerations section.
Can multiple TLC59281RGER devices be daisy-chained, and how is data routed?
Yes, multiple TLC59281RGER devices can be daisy-chained using the SOUT pin of one device connected to the SIN pin of the next. Serial data is shifted LSB-first through the 16-bit shift register of each device on SCLK rising edges; a single LAT pulse then latches all data simultaneously across the chain. This architecture is illustrated in the Typical Application Circuit and Register Configuration sections of the datasheet.
What is the purpose of the BLANK pin on the TLC59281RGER, and what timing constraints apply?
The BLANK pin on the TLC59281RGER forces all 16 outputs OFF when driven high, enabling precise PWM dimming and fault-safe shutdown. Its minimum pulse width is 20 ns (TWH2/TWL2), and propagation delay from BLANK edge to output current transition is ≤30 ns. These values ensure sub-microsecond blanking control-critical for high-refresh-rate displays and strobed lighting applications-as documented in the AC Characteristics and SWITCHING CHARACTERISTICS tables.
TLC59281RGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-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:
- 35mA
- Frequency:
- 35MHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
TLC59281RGER FAQ
1.How can I place an order for TLC59281RGER through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59281RGER 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 TLC59281RGER reliable?
The price and inventory of TLC59281RGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59281RGER is usually 5 days.
3.What payment methods are accepted for TLC59281RGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59281RGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59281RGER?
TLC59281RGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59281RGER 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 TLC59281RGER?
For technical support, including TLC59281RGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59281RGER requirements.
6.How does Aetrix verify that TLC59281RGER is sourced from the original manufacturer or authorized distributors?
All TLC59281RGER 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 TLC59281RGER meets industry standards.
7.What is the process for return or replacement of TLC59281RGER?
All TLC59281RGER units undergo pre-shipment inspection (PSI). If there is an issue with TLC59281RGER, 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 TLC59281RGER part is unused and in its original packaging.
Return procedure for TLC59281RGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59281RGER Tags
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