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Allegro MicroSystems A6282ELPTR-T
- Part No.:
- A6282ELPTR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- LED Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
A6282ELPTR-T.pdf
- Description:
- IC LED DRVR LINEAR 50MA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,999
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Product details
Overview
A6282ELPTR-T from Allegro MicroSystems is a 16-channel constant-current LED sink driver in a 24-pin TSSOP package with exposed thermal pad, supporting up to 50 mA per channel, 12 V LED load voltage, and 30 MHz serial data input rate for high-speed LED display control.
For engineers reviewing the A6282ELPTR-T datasheet, A6282ELPTR-T pinout, A6282ELPTR-T application, or A6282ELPTR-T equivalent, this device serves as a microprocessor-compatible serial-to-parallel LED driver with Schmitt-trigger inputs, Power-On Reset, internal UVLO, and thermal shutdown-critical for reliable monochrome/multicolor signage and backlighting designs.
Technical Context
The A6282ELPTR-T integrates a 16-bit CMOS shift register, parallel latches, and 16 matched MOSFET sink drivers with current regulation set by a single external REXT resistor. Its logic interface operates from 3.0–5.5 V and supports cascading via SDO/SDI.
Internal circuitry includes undervoltage lockout (UVLO) with 2.5–2.9 V activation threshold, thermal shutdown at 165°C typical with 15°C hysteresis, and Schmitt-trigger inputs providing ≥250 mV hysteresis for noise immunity in industrial LED systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 constant-current sink outputs, each programmable up to 50 mA via REXT |
| LED supply voltage | Up to 12 V (VLED), enabling direct drive of common LED strings without external boost |
| Logic supply range | 3.0–5.5 V, compatible with both 3.3 V and 5 V microcontrollers |
| Max serial clock rate | 30 MHz, supporting fast refresh rates in high-resolution LED displays |
| Current matching | ±3% between channels, ±7% between ICs over –40°C to +85°C, ensuring uniform brightness |
| Thermal protection | Internal thermal shutdown at 165°C typical with 15°C hysteresis, preserving reliability during overload |
| Input hysteresis | Schmitt-trigger inputs with 250–900 mV hysteresis, rejecting noise on CLK/LE/SDI in noisy environments |
Pinout & Package
Package: 24-pin TSSOP (LP) with exposed thermal pad, lead-free, 100% matte tin plating, 7.80 mm × 4.40 mm footprint, optimized for thermal dissipation in LED driver applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK (Pin 3) | Clock input | Rising-edge-triggered serial data shift clock; supports up to 30 MHz operation |
| LE (Pin 4) | Latch Enable | Level-sensitive control that transfers shift register contents to output latches |
| OE (Pin 21) | Output Enable (active low) | Global enable/disable of all 16 outputs; high = all outputs forced off |
| SDI (Pin 2) | Serial Data In | CMOS-level input accepting microcontroller SPI-like serial data stream |
| SDO (Pin 22) | Serial Data Out | Allows daisy-chaining multiple A6282ELPTR-T devices for expanded channel count |
| REXT (Pin 23) | Reference current terminal | Connects external resistor to GND to set precise per-channel current (e.g., 374 Ω → ~51 mA) |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | 16 independent, thermally stable current sources driving LED cathodes |
| VDD (Pin 24) | Logic supply | 3.0–5.5 V CMOS core supply; powers shift register, latches, and control logic |
| GND (Pin 1) | Ground reference | Shared logic and power ground; requires star grounding for optimal current accuracy |
| PAD (exposed) | Thermal pad | Must be connected to PCB ground plane with thermal vias to maintain TJ ≤ 150°C |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor current programming | One external REXT sets identical current across all 16 channels-reducing BOM count and layout complexity |
| High-speed serial interface | 30 MHz max clock enables full 16-bit update in <533 ns, supporting >1.8 kHz frame rates in 16×16 LED matrices |
| Integrated protection circuits | UVLO prevents erratic behavior during brownout; thermal shutdown disables outputs at 165°C while preserving latch state |
| Matched output performance | ±3% channel-to-channel current matching ensures consistent LED brightness without per-channel calibration |
| Noise-immune digital inputs | Schmitt-trigger inputs reject >250 mV of noise on CLK/LE/SDI/SDO, critical for long trace runs in signage cabinets |
Applications
| Monochrome LED Signage | Multicolor LED Display |
|---|---|
|
Use Scenario: Outdoor alphanumeric message boards using red/green/yellow LEDs with row-column multiplexing. IC Role / Device Role / Timing Role: Constant-current sink driver controlling LED cathodes in 16-line segments per A6282ELPTR-T, synchronized via microcontroller SPI. Use Value: Enables uniform brightness across 16×N LED arrays with ±3% current matching, eliminating visible banding under varying ambient temperatures. |
Use Scenario: Indoor full-color video wall modules using RGB LED clusters with PWM dimming. IC Role / Device Role / Timing Role: Serially updated sink driver for one color channel (e.g., red) per module, cascaded for 64+ outputs per controller. Use Value: 30 MHz serial interface allows real-time pixel data streaming; thermal shutdown protects against LED short-circuit failures during field operation. |
| Display Backlighting | Multicolor LED Lighting |
|
Use Scenario: Edge-lit LCD backlights in industrial HMIs requiring precise luminance control and long life. IC Role / Device Role / Timing Role: Current-regulated driver for white LED strings, with REXT tuned to deliver 20–30 mA per string. Use Value: 12 V VLED rating supports series-connected LEDs; ±7% inter-device matching ensures consistent backlight intensity across multiple A6282ELPTR-T units. |
Use Scenario: Architectural accent lighting using addressable multicolor LED strips controlled by MCU. IC Role / Device Role / Timing Role: Cascadable sink driver for grouped LED channels (e.g., 16 blue LEDs per A6282ELPTR-T), updated via daisy-chained SDI/SDO. Use Value: Exposed thermal pad in TSSOP package sustains 1.2 W dissipation at 85°C ambient-enabling compact, fanless fixture designs. |
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 |
|---|---|---|---|
| TLC59282DBQR | 16-channel sink driver, 3–5.5 V logic, but max 120 mA per channel and no thermal shutdown | Higher current capability suits high-brightness outdoor signs, but lacks integrated thermal protection | Select when higher per-channel current is required and external thermal monitoring is acceptable |
| STP16DP05PTR | 16-channel sink driver with 30 MHz clock, but only 100 mA max per channel and no UVLO | Better suited for automotive interior lighting where higher current and ESD tolerance (4 kV HBM) are prioritized | Choose for automotive-grade robustness where UVLO and thermal shutdown are managed externally |
Compared with TLC59282DBQR and STP16DP05PTR, the A6282ELPTR-T uniquely combines ±3% channel matching, integrated UVLO, and thermal shutdown in a thermally enhanced TSSOP package-making it optimal for industrial signage where reliability and brightness uniformity are non-negotiable.
Availability
A6282ELPTR-T is available at Aetrix Electronics and suitable for monochrome LED signage, multicolor display modules, and display backlighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for A6282ELPTR-T 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
Allegro MicroSystems is a U.S.-based designer of high-performance magnetic sensors and power ICs, founded in 1989 and headquartered in Worcester, Massachusetts.
The A6282 product line delivers precision constant-current LED drivers for industrial and commercial signage, emphasizing thermal robustness, noise immunity, and seamless microcontroller integration.
FAQ
What is the maximum LED supply voltage supported by the A6282ELPTR-T?
The A6282ELPTR-T supports a maximum LED load supply voltage (VLED) of 12 V, as specified in its absolute maximum ratings. This allows direct connection to common 12 V LED bus architectures without intermediate regulation, provided the voltage drop across each output (VDS) remains within 1.0–3.0 V to limit package power dissipation. Operation above 12 V risks permanent damage.
How does the REXT resistor set the output current in the A6282ELPTR-T?
The A6282ELPTR-T uses an internal 1.21 V bandgap reference at the REXT pin to establish output current. With REXT connected between REXT and GND, the per-channel current is calculated as IO(max) = (18841.2 / REXT) + 0.68 mA (for VDD = 4.5–5.5 V). For example, a 374 Ω resistor yields ~51.1 mA typical per channel, verified across temperature and unit variation.
Does the A6282ELPTR-T support daisy-chaining with other A6282 devices?
Yes, the A6282ELPTR-T supports daisy-chaining via its SDO (Serial Data Out) and SDI (Serial Data In) pins. When cascading, the SDO of one A6282ELPTR-T connects to the SDI of the next, allowing a single microcontroller to drive dozens of outputs using one serial data line and shared CLK/LE/OE signals-reducing GPIO count and PCB routing complexity.
What protection features are built into the A6282ELPTR-T?
The A6282ELPTR-T includes three key protections: (1) Undervoltage Lockout (UVLO) disabling outputs below ~2.5 V logic supply to prevent erratic display behavior; (2) Thermal Shutdown (TSD) turning off outputs at 165°C junction temperature while preserving latch data; and (3) Schmitt-trigger inputs with 250–900 mV hysteresis to reject noise on control lines-ensuring robust operation in electrically noisy environments.
Is the exposed thermal pad on the A6282ELPTR-T package required to be connected to ground?
Yes, the exposed thermal pad on the A6282ELPTR-T's TSSOP package must be soldered to a PCB ground plane using multiple thermal vias. This connection is essential for achieving the specified RθJA of 28°C/W and preventing junction temperature exceedance. Leaving the pad unconnected or floating degrades thermal performance and risks premature thermal shutdown or parametric drift during sustained operation.
A6282ELPTR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 12V
- Current - Output / Channel:
- 50mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP-EP
A6282ELPTR-T FAQ
1.How can I place an order for A6282ELPTR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A6282ELPTR-T 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 A6282ELPTR-T reliable?
The price and inventory of A6282ELPTR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A6282ELPTR-T is usually 5 days.
3.What payment methods are accepted for A6282ELPTR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A6282ELPTR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A6282ELPTR-T?
A6282ELPTR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A6282ELPTR-T 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 A6282ELPTR-T?
For technical support, including A6282ELPTR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A6282ELPTR-T requirements.
6.How does Aetrix verify that A6282ELPTR-T is sourced from the original manufacturer or authorized distributors?
All A6282ELPTR-T 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 A6282ELPTR-T meets industry standards.
7.What is the process for return or replacement of A6282ELPTR-T?
All A6282ELPTR-T units undergo pre-shipment inspection (PSI). If there is an issue with A6282ELPTR-T, 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 A6282ELPTR-T part is unused and in its original packaging.
Return procedure for A6282ELPTR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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