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Texas Instruments TLC59284DBQR
- Part No.:
- TLC59284DBQR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
TLC59284DBQR.pdf
- Description:
- IC LED DRIVER LINEAR 45MA 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,417
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Product details
Overview
TLC59284DBQR from Texas Instruments is a 16-channel constant-current LED sink driver in SSOP-24 package, supporting up to 45 mA per channel (VCC > 3.6 V), 35 mA (VCC ≤ 3.6 V), with 35 MHz serial data rate and 50 ns minimum BLANK pulse width. It enables precise brightness control in high-density LED video displays and message boards via daisy-chainable serial interface.
For engineers reviewing the TLC59284DBQR datasheet, TLC59284DBQR pinout, TLC59284DBQR application, or TLC59284DBQR equivalent, key selection criteria include constant-current accuracy (±1.4% typ channel-to-channel), switching delay for EMI reduction, IREF resistor-based current setting, and BLANK/LAT-controlled output latching behavior in industrial LED systems.
Technical Context
The TLC59284DBQR implements a 16-bit shift register cascaded to an output on/off latch, with Schmitt-triggered SIN/SCLK/LAT/BLANK inputs for noise immunity. Data transfer occurs on SCLK rising edges, and LAT high enables real-time latch update - enabling dynamic brightness updates without frame tearing.
Its constant-current sink architecture uses a single external resistor (RIREF) tied to IREF/GND to set all 16 channels identically, with reference voltage VIREF = 1.208 V (typ). Output switching delay groups outputs into nine staggered timing groups (e.g., OUT0 alone; OUT1/OUT15 paired) to suppress simultaneous-switching noise and EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 independent constant-current sink outputs (OUT0–OUT15) |
| Max Sink Current | 45 mA per channel at VCC > 3.6 V; enables driving high-brightness LEDs at 5 V supply |
| Current Accuracy | ±1.4% (typ) channel-to-channel mismatch; ensures uniform LED brightness across display rows |
| Data Rate | 35 MHz SCLK frequency; supports fast refresh rates in video-grade LED panels |
| BLANK Pulse Width | 50 ns minimum; allows precise blanking during power-up or frame transitions to prevent ghosting |
| Operating Temp | –40°C to +85°C ambient; qualified for outdoor signage and industrial message boards |
| VCC Range | 3.0 V to 5.5 V; compatible with both 3.3 V and 5 V logic systems without level shifting |
Pinout & Package
SSOP-24 (DBQ) package: 0.154-inch body width, 0.635-mm lead pitch, thermally enhanced for continuous LED drive operation. Pin 1 marked by notch or dot; pin 1 quadrant Q1 per tape reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Common return path for all 16 sink outputs and internal logic; must be low-impedance |
| SIN (Pin 2) | Serial data input | Schmitt-triggered input accepting 3.3 V or 5 V logic; LSB-first 16-bit data stream for output control |
| SCLK (Pin 3) | Serial clock input | Rising-edge synchronized shift clock; max 35 MHz supports <286 ns per bit transfer |
| LAT (Pin 4) | Latch enable input | Schmitt-triggered; high level transfers shift register contents to output latch; internally pulled down |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | Each independently controlled; support up to 10 V LED forward voltage; grouped for staggered switching |
| IREF (Pin 23) | Current reference terminal | Connect external resistor to GND to set all 16 channels' sink current (VIREF = 1.208 V typ) |
| BLANK (Pin 21) | Global output disable | Active-high; forces all outputs OFF regardless of latch state; internally pulled up to VCC |
| SOUT (Pin 22) | Serial data output | MSB of shift register; enables daisy-chaining multiple TLC59284DBQR devices |
| VCC (Pin 24) | Supply voltage | 3.0–5.5 V digital and analog supply; powers logic, reference, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Staggered output switching | Nine independent output groups with ~1 ns inter-group delay reduce peak current surge and EMI by >90% vs. simultaneous switching |
| Daisy-chain capability | SOUT-to-SIN connection supports unlimited cascading; eliminates parallel bus routing and reduces controller GPIO count |
| Single-resistor current setting | One RIREF sets identical current across all 16 channels (2–45 mA range); simplifies BOM and improves channel matching |
| Robust input interface | All control pins (SIN/SCLK/LAT/BLANK) feature Schmitt triggers and internal pull-up/pull-down resistors (500 kΩ typ) for noise immunity and default-safe startup |
| Wide LED voltage support | OUTn rated to 11 V maximum; accommodates multi-LED strings (e.g., 3× white LEDs @ 3.2 V each = 9.6 V) |
Applications
| Video Display Panels | Outdoor Message Boards |
|---|---|
Use Scenario: High-resolution indoor LED video wall with 16×16 pixel modules per driver IC. IC Role / Device Role / Timing Role: Constant-current sink driver controlling individual red/green/blue subpixels; LAT-synchronized latching prevents row tearing during rapid frame updates. Use Value: ±1.4% channel-to-channel current matching ensures color fidelity and eliminates visible banding across 256-pixel segments. | Use Scenario: Solar-powered roadside variable-message sign with 128-character alphanumeric display. IC Role / Device Role / Timing Role: LED column driver managing 16-character segments; BLANK pulse blanks display during MCU wake-up to avoid flash artifacts. Use Value: 50 ns minimum BLANK width enables clean power-cycle recovery without firmware delay insertion. |
| Industrial Status Indicators | Architectural Lighting Arrays |
Use Scenario: Factory-floor machine status panel with 16 discrete warning lights (red/yellow/green). IC Role / Device Role / Timing Role: Fault-tolerant LED driver with independent ON/OFF control per indicator; IREF resistor sets consistent brightness across temperature (-40°C to +85°C). Use Value: ±2% device-to-device current variation ensures uniform visual intensity across multiple PCBs in large-scale deployments. | Use Scenario: RGBW linear lighting strip with 16-zone dimming control per segment. IC Role / Device Role / Timing Role: Constant-current sink for high-CRI white and color LEDs; staggered group switching eliminates audible coil whine and conducted noise in sensitive audio environments. Use Value: 1-ns inter-group delay reduces peak di/dt by >95%, meeting CISPR-11 Class B radiated emissions limits without added filtering. |
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 (12-bit PWM) and grayscale control; requires external VREF and more complex initialization. | Better suited for grayscale video where per-channel intensity tuning is required; not drop-in for simple ON/OFF LED arrays. | Select TLC59284DBQR when only binary LED control is needed and board space/cost favor simpler interface and single-resistor setup. |
| MAX7219CWG+ | 8-channel, integrated serial interface with scan-limiting and shutdown; fixed 40 mA per channel; no IREF adjustment. | Targeted at 7-segment/matrix displays with built-in decoding; lacks flexibility for custom LED string configurations. | Choose TLC59284DBQR for 16-channel demand, adjustable current, and higher voltage (10 V) LED support beyond MAX7219's 5.5 V limit. |
Compared with TLC5940RHBR and MAX7219CWG+, the TLC59284DBQR delivers optimal balance of channel count, current adjustability, and noise-suppressed switching for cost-sensitive, high-reliability LED signage - without requiring grayscale logic or sacrificing output voltage headroom.
Availability
TLC59284DBQR is available at Aetrix Electronics and suitable for video displays, outdoor message boards, and industrial status indicators requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for TLC59284DBQR 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 power management technologies with over 90 years of innovation in industrial and automotive electronics.
The TLC59284DBQR belongs to TI's LED driver product line, engineered specifically for high-channel-count, constant-current LED array control in signage and display systems where EMI reduction and thermal stability are critical.
FAQ
What is the maximum LED forward voltage supported by the TLC59284DBQR?
The TLC59284DBQR supports up to 10 V LED power-supply voltage per output (OUT0–OUT15), with absolute maximum rating of +11 V. This enables driving strings of 3–4 standard white LEDs (3.2–3.6 V each) or high-voltage red/green LEDs without external boost circuitry. The device maintains constant-current regulation across this full output voltage range when VCC ≥ 3 V.
How does the TLC59284DBQR achieve EMI reduction during LED switching?
The TLC59284DBQR achieves EMI reduction by grouping its 16 outputs into nine staggered timing groups (e.g., OUT0 alone; OUT1/OUT15 paired) with ~1 ns inter-group delay. This spreads the turn-on/turn-off current transient over time, reducing peak di/dt and conducted/radiated noise. The effect is confirmed in Figure 11 timing diagrams and referenced in the "Noise Reduction" section of the datasheet.
Can the TLC59284DBQR be used with 3.3 V microcontrollers without level shifters?
Yes, the TLC59284DBQR accepts 3.3 V CMOS logic levels directly on SIN, SCLK, LAT, and BLANK inputs - verified by VIH = 0.7 × VCC (min) and VIL = 0.3 × VCC (max) across VCC = 3.0–5.5 V. Its Schmitt-triggered inputs provide noise margin, and internal pull-up/pull-down resistors ensure defined states during reset or floating conditions.
What is the role of the IREF pin and how is current set on the TLC59284DBQR?
The IREF pin connects to an external resistor (RIREF) tied to GND to set the constant-current value for all 16 channels. With internal reference voltage VIREF = 1.208 V (typ), sink current is calculated as IOLC ≈ 43.8 mA × (1.208 V / RIREF). For example, RIREF = 1.51 kΩ yields 35 mA (VCC ≤ 3.6 V) or 45 mA (VCC > 3.6 V), per Table 1 in the datasheet.
Is the TLC59284DBQR pin-compatible with other TI LED drivers like the TLC59283?
No, the TLC59284DBQR is not pin-compatible with TLC59283. While both are 16-channel constant-current drivers in SSOP-24, TLC59283 lacks SOUT and uses different pin assignments (e.g., BLANK on Pin 22 vs. Pin 21). The TLC59284DBQR's unique pinout - including dedicated SOUT (Pin 22) and IREF (Pin 23) - requires PCB layout revision for substitution.
TLC59284DBQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- 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:
- 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
TLC59284DBQR FAQ
1.How can I place an order for TLC59284DBQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59284DBQR 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 TLC59284DBQR reliable?
The price and inventory of TLC59284DBQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59284DBQR is usually 5 days.
3.What payment methods are accepted for TLC59284DBQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59284DBQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59284DBQR?
TLC59284DBQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59284DBQR 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 TLC59284DBQR?
For technical support, including TLC59284DBQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59284DBQR requirements.
6.How does Aetrix verify that TLC59284DBQR is sourced from the original manufacturer or authorized distributors?
All TLC59284DBQR 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 TLC59284DBQR meets industry standards.
7.What is the process for return or replacement of TLC59284DBQR?
All TLC59284DBQR units undergo pre-shipment inspection (PSI). If there is an issue with TLC59284DBQR, 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 TLC59284DBQR part is unused and in its original packaging.
Return procedure for TLC59284DBQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59284DBQR Tags
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