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Texas Instruments TLC59284DBQ
- Part No.:
- TLC59284DBQ
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
TLC59284DBQ.pdf
- Description:
- IC LED DRIVER LINEAR 45MA 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:169
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Product details
Overview
TLC59284DBQ from Texas Instruments is a 16-channel constant-current LED sink driver in SSOP-24 package, delivering up to 45 mA per channel (VCC > 3.6 V), supporting 35 MHz serial data rate, and featuring BLANK-controlled global output blanking with 50 ns minimum pulse width. It enables precise, daisy-chainable LED control in high-density video displays.
For engineers reviewing the TLC59284DBQ datasheet, TLC59284DBQ pinout, TLC59284DBQ application, or TLC59284DBQ equivalent, key selection criteria include channel-to-channel current accuracy (±1.4% typ), switching delay–based noise reduction, IREF-resistor–set current programming, and compatibility with 3.3 V/5 V CMOS logic levels across –40°C to +85°C operation.
Technical Context
The TLC59284DBQ integrates a 16-bit serial shift register and an output latch, with LAT enabling synchronous data transfer from shift register to latch. Its constant-current sink outputs are individually controlled via serial data and globally disabled via BLANK - a Schmitt-triggered input with internal 500 kΩ pull-up.
Current regulation is set by a single external resistor (RIREF) connected between IREF and GND, establishing sink current from 2 mA to 45 mA depending on VCC and RIREF value. Output switching incorporates grouped turn-on/off delays (1 ns typ) to suppress EMI from simultaneous channel transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3 V to 5.5 V - supports dual-rail logic interface without level shifters |
| Max Sink Current | 45 mA per channel (VCC > 3.6 V) - enables driving high-brightness LEDs at 5 V supply |
| Channel Accuracy | ±1.4% (typ), ±3% (max) - ensures uniform LED brightness across all 16 channels |
| Data Rate | 35 MHz SCLK - allows full 16-bit update in ≤457 ns, suitable for high-refresh-rate displays |
| BLANK Pulse Width | 50 ns min - enables fast, glitch-free global blanking during data latching or power-up |
| Operating Temp | –40°C to +85°C - qualified for industrial and outdoor signage environments |
| Output Voltage Range | Up to 10 V - supports common-anode LED strings with forward voltages up to 9.7 V |
Pinout & Package
SSOP-24 (DBQ) package: 0.635 mm pitch, 8.2 mm × 3.91 mm body, 1.45 mm max height, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1) | Power ground reference | Primary return path for all sink currents and logic; requires low-impedance PCB plane |
| SIN (2) | Serial data input | Schmitt-triggered; accepts 3.3 V/5 V logic; LSB-first 16-bit shift register load |
| SCLK (3) | Serial clock input | Schmitt-triggered; rising-edge synchronized data shift; supports up to 35 MHz |
| LAT (4) | Latch enable input | Schmitt-triggered with internal 500 kΩ pull-down; transfers shift register to output latch on rising edge |
| OUT0–OUT15 (5–20) | Constant-current sink outputs | 16 independent open-drain outputs; each capable of sinking up to 45 mA at VOUT ≤10 V |
| IREF (23) | Current-setting reference node | Connect external resistor to GND to program sink current; internal 1.208 V reference |
| BLANK (21) | Global output disable | Schmitt-triggered with internal 500 kΩ pull-up; forces all OUTn OFF when high |
| SOUT (22) | Serial data output | MSB of shift register; enables daisy-chaining multiple TLC59284DBQ devices |
| VCC (24) | Positive supply | Powers logic and output drivers; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel constant-current sink | Each channel independently controllable via serial interface; no external current-setting resistors per channel |
| Switching delay for noise reduction | Outputs grouped into 9 staggered turn-on/turn-off sequences (1 ns typ delay between groups) to minimize EMI |
| Daisy-chain capability | SOUT-to-SIN cascading supports unlimited channel expansion with single controller interface |
| Wide LED voltage support | 10 V output compliance enables use with multi-LED series strings (e.g., 3× white LEDs @ 3.2 V) |
| Robust logic interface | CMOS-compatible inputs tolerate 3.3 V or 5 V logic; VIH = 0.7×VCC, VIL = 0.3×VCC |
Applications
| Video Display Backlighting | Outdoor Message Board |
|---|---|
|
Use Scenario: Driving uniform backlight zones in LCD panels using 16 parallel LED strings. IC Role / Device Role / Timing Role: Constant-current sink driver providing per-zone brightness control via PWM-modulated BLANK and serial data updates. Use Value: ±1.4% channel accuracy ensures consistent luminance across zones; 35 MHz data rate enables real-time dimming updates at 120 Hz refresh. |
Use Scenario: Controlling segmented alphanumeric characters in large-format roadside signage under variable ambient light. IC Role / Device Role / Timing Role: Serially addressed LED sink driver managing 16 segments per character module with global blanking for flicker-free multiplexing. Use Value: 10 V output compliance supports high-Vf amber/red LEDs; grouped switching delay reduces conducted EMI in electrically noisy roadside environments. |
| Architectural LED Strip Control | Industrial Panel Indicator Array |
|
Use Scenario: Powering addressable RGBW LED strips where each segment uses one TLC59284DBQ for white channel control. IC Role / Device Role / Timing Role: Dedicated constant-current sink for high-current white LEDs (up to 45 mA), coordinated via daisy-chained serial bus. Use Value: Single RIREF resistor simplifies thermal design vs. per-channel resistors; SSOP-24 footprint allows dense placement on narrow strip PCBs. |
Use Scenario: Driving 16 status indicators (e.g., fault, ready, comms active) on industrial HMI panels requiring long-term reliability. IC Role / Device Role / Timing Role: Robust LED driver with –40°C to +85°C rating and 50 ns BLANK pulse for deterministic startup behavior. Use Value: ±2% device-to-device current matching ensures consistent indicator brightness across multiple boards; no external timing components required. |
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 |
|---|---|---|---|
| TLC5940RHBR | 16-channel, but includes dot-correction (6-bit) and grayscale PWM (12-bit); requires external Vref and more complex interface | Better suited for high-fidelity grayscale video; higher BOM cost and layout complexity | Select when per-channel grayscale intensity control beyond ON/OFF is required |
| MAX7219CWG+ | 8-digit/64-LED display driver with built-in BCD decode, scan limit, and intensity control; SPI interface only | Optimized for 7-segment/matrix displays; not configurable as general-purpose constant-current sink | Select for fixed-format numeric/alphanumeric displays where integrated decode simplifies MCU firmware |
Compared with TLC59284DBQ, TLC5940RHBR adds precision grayscale but increases system complexity, while MAX7219CWG+ offers integrated display logic at the expense of flexible current programming - making TLC59284DBQ optimal for custom LED array control with minimal external components.
Availability
TLC59284DBQ is available at Aetrix Electronics and suitable for video displays, message boards, and architectural LED lighting requiring stable component supply, industrial temperature range operation, and daisy-chain scalability.
Supply support for TLC59284DBQ 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 connectivity technologies, with decades of expertise in precision power and signal chain ICs.
The TLC59284DBQ belongs to TI's LED driver portfolio designed specifically for high-reliability, constant-current LED control in commercial signage and industrial human-machine interfaces.
FAQ
What is the maximum LED forward voltage supported by the TLC59284DBQ?
The TLC59284DBQ supports an output voltage range up to +11 V (absolute max) and is specified for LED power-supply voltage up to 10 V. This allows driving series-connected LED strings with combined forward voltages up to 9.7 V while maintaining constant-current regulation - verified across the full operating temperature range (–40°C to +85°C) and VCC = 3 V to 5.5 V.
How is the output current programmed on the TLC59284DBQ?
The TLC59284DBQ uses a single external resistor (RIREF) connected between the IREF pin and GND to set all 16 channel currents. The internal 1.208 V reference generates a proportional sink current: IOUT ≈ 43.8 mA × (1.208 V / RIREF). For example, a 1.51 kΩ resistor yields ~35 mA per channel at VCC ≤ 3.6 V, and the same resistor yields ~45 mA when VCC > 3.6 V.
Does the TLC59284DBQ support daisy-chaining, and how is it implemented?
Yes, the TLC59284DBQ supports seamless daisy-chaining via its SOUT pin, which outputs the MSB of its internal 16-bit shift register on each SCLK rising edge. To cascade, connect SOUT of Device 1 to SIN of Device 2, share SCLK/LAT/BLANK lines, and drive LAT after loading all devices' shift registers. This enables scalable control of N×16 channels with only four MCU pins.
What is the purpose of the switching delay feature in the TLC59284DBQ?
Switching delay staggers the turn-on and turn-off timing of the 16 outputs across nine predefined groups (e.g., OUT0 alone; OUT1+OUT15; OUT2+OUT14, etc.) with ~1 ns inter-group delay. This prevents simultaneous current transients that cause EMI and ground bounce - critical in noise-sensitive applications like video displays and industrial HMIs where clean power integrity is mandatory.
Can the TLC59284DBQ operate with both 3.3 V and 5 V logic systems?
Yes, the TLC59284DBQ features CMOS logic-level inputs (SIN, SCLK, LAT, BLANK) compatible with both 3.3 V and 5 V systems: VIH = 0.7×VCC and VIL = 0.3×VCC, so it accepts valid high/low thresholds across its full 3 V–5.5 V VCC range. No level-shifting circuitry is needed, simplifying integration into mixed-voltage designs.
TLC59284DBQ 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:
- 10V
- Current - Output / Channel:
- 45mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
TLC59284DBQ FAQ
1.How can I place an order for TLC59284DBQ through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59284DBQ 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 TLC59284DBQ reliable?
The price and inventory of TLC59284DBQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59284DBQ is usually 5 days.
3.What payment methods are accepted for TLC59284DBQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59284DBQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59284DBQ?
TLC59284DBQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59284DBQ 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 TLC59284DBQ?
For technical support, including TLC59284DBQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59284DBQ requirements.
6.How does Aetrix verify that TLC59284DBQ is sourced from the original manufacturer or authorized distributors?
All TLC59284DBQ 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 TLC59284DBQ meets industry standards.
7.What is the process for return or replacement of TLC59284DBQ?
All TLC59284DBQ units undergo pre-shipment inspection (PSI). If there is an issue with TLC59284DBQ, 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 TLC59284DBQ part is unused and in its original packaging.
Return procedure for TLC59284DBQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59284DBQ Tags
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