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Allegro MicroSystems A6262KLYTR-T
- Part No.:
- A6262KLYTR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- LED Drivers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
A6262KLYTR-T.pdf
- Description:
- IC LED DRVR LIN PWM 100MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,034
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Product details
Overview
A6262KLYTR-T from Allegro MicroSystems is a linear, AEC-Q100-qualified LED current regulator IC designed for automotive interior lighting. It delivers up to 100 mA per channel across four matched high-side current sources (LA1–LA4), with ±4% current accuracy, 5% matching between outputs, and 6–50 V input supply range - enabling robust drive of 1–3 LEDs per string in dome, map, and mood lighting systems.
For engineers reviewing the A6262KLYTR-T datasheet, A6262KLYTR-T pinout, A6262KLYTR-T application, or A6262KLYTR-T equivalent, key selection considerations include thermal foldback behavior (adjustable via THTH pin), short-to-ground protection per output, PWM-enabled EN control with slew-limited transitions, and compatibility with 10-pin MSOP (LY) package for space-constrained automotive PCBs.
Technical Context
The A6262KLYTR-T implements four independent linear current regulators with shared reference (IREF) and thermal monitoring circuitry. Each LAx output operates as a high-side current source, sinking current from VIN through connected LED strings to ground, with regulation enforced by internal feedback comparing IREF-derived reference voltage (1.2 V typ.) against sensed current.
Protection logic includes per-output short detection (triggered at 1.2–1.8 V on LAx), automatic recovery after fault removal, and junction temperature-dependent current reduction starting at adjustable TJM (95–130°C). The SW pin provides debounced toggle control (10–50 ms), while EN enables direct PWM dimming with 50–110 µs current slew time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 100 mA per channel (LA1–LA4); total 400 mA max - sufficient for 4× high-brightness LED strings in automotive cabin lighting. |
| Current Accuracy | ±4% over –40°C to 125°C - ensures consistent luminance across temperature without external calibration. |
| Current Matching | Better than 5% between active outputs - eliminates need for ballast resistors in multi-string arrays. |
| Supply Range | 6–50 V - supports 12 V automotive net with margin for load dump transients. |
| Dropout Voltage | 660 mV at 40 mA; 800 mV at 100 mA - enables efficient operation with low forward-voltage LED strings (e.g., 3× red LEDs @ 2.3 V). |
| Thermal Activation | Adjustable TJM (95–130°C) via THTH pin - allows system-level thermal coordination with LED substrate. |
| Short Detection | Per-output LAx short-to-ground detection at 1.2–1.8 V - disables only affected channel, preserving illumination from remaining strings. |
Pinout & Package
Package: 10-pin MSOP (3 × 3 mm) with exposed thermal pad (suffix LY), Pb-free, 100% matte tin plating - optimized for thermal dissipation in compact automotive modules.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| THTH | Thermal threshold adjust | Resistor divider on this pin sets TJM (95–130°C); open = default activation; grounded = thermal monitor disabled. |
| IREF | Current reference input | 1.2 V reference node; RREF to GND sets all output currents (ILAx = 15 × (1.2 V / RREF)). |
| GND | Ground reference | Primary return path for control circuitry and LED sink current - must connect directly to power ground plane. |
| LA1–LA4 | LED anode outputs | High-side current sources; each sinks up to 100 mA - connect to LED anodes; open or tied to VIN to disable. |
| SW | Debounced toggle input | Pull-up to ~3 V; 10–50 ms debounce - accepts push-to-make switch to GND for manual on/off control. |
| EN | Enable/PWM input | Direct on/off or PWM control; overrides SW when high; 150–350 mV hysteresis prevents noise-induced toggling. |
| VIN | Power supply input | 6–50 V main supply; powers regulators and logic - requires 100 nF ceramic bypass capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualification | Qualified to Grade 1 (–40°C to +125°C ambient) - meets automotive reliability and stress-test requirements. |
| Per-output short protection | Independent LAx short detection and auto-recovery - maintains partial illumination during single-point faults. |
| Adjustable thermal foldback | TJM programmable via THTH pin resistor - enables coordinated thermal management with LED board layout. |
| PWM-compatible EN input | 50–110 µs current slew rate - limits EMI during dimming while preserving LED lifetime. |
| No ballast resistors needed | <5% current matching between LA1–LA4 - reduces BOM count and PCB area vs. discrete current-setting solutions. |
Applications
| Dome Light Control | Map Light Dimming |
|---|---|
|
Use Scenario: Central overhead lighting in passenger compartment, activated by door opening or ignition state. IC Role / Device Role / Timing Role: High-side current regulator providing stable 100 mA per string to four independent white LED arrays. Use Value: Maintains consistent brightness across temperature and supply variation; short protection preserves partial illumination if one LED string fails. |
Use Scenario: Driver/passenger reading lights with soft-on/off transition and PWM dimming. IC Role / Device Role / Timing Role: Four-channel constant-current driver accepting EN-based PWM input for smooth 0–100% intensity control. Use Value: Slew-limited current transitions prevent audible coil whine and reduce EMI during dimming cycles. |
| Mood Lighting System | Space Lighting Array |
|
Use Scenario: Ambient cabin lighting with color-tunable or multi-zone white LEDs controlled via CAN/LIN gateway. IC Role / Device Role / Timing Role: Programmable current source enabling precise luminance matching across multiple zones using single IREF resistor. Use Value: 5% inter-channel matching eliminates visible intensity gradients without per-channel calibration or trimming. |
Use Scenario: Footwell, cargo, or trunk lighting with redundant LED strings for safety-critical visibility. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with per-output short detection and automatic recovery. Use Value: Single LAx short disables only that channel - remaining three strings stay illuminated, meeting ASIL-B functional safety expectations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED current regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862Q-7 | Switching buck LED driver; 40 V max input; integrated MOSFET; higher efficiency but larger solution size. | Requires external inductor and diode; better suited for high-power (>500 mA) or thermally constrained designs. | Select when >85% efficiency is required and board space permits inductor placement. |
| TPS92692QPWPRQ1 | Linear current regulator with I²C interface; 1.5% current accuracy; 10-bit dimming resolution; no SW pin. | Enables digital brightness control and diagnostics; lacks hardware toggle (SW) and thermal threshold adjustment (THTH). | Select when system-level microcontroller integration and diagnostic reporting are prioritized over analog simplicity. |
Compared with AL8862Q-7 and TPS92692QPWPRQ1, the A6262KLYTR-T offers the simplest analog implementation for 4×100 mA automotive LED strings - requiring only one reference resistor, no inductor, and retaining dedicated hardware controls (SW toggle, adjustable thermal foldback) critical for cost-sensitive, safety-aware cabin lighting modules.
Availability
A6262KLYTR-T is available at Aetrix Electronics and suitable for automotive dome lighting, map lighting, and mood lighting applications requiring stable component supply, AEC-Q100 compliance, and thermal resilience in under-hood or cabin environments.
Supply support for A6262KLYTR-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 semiconductor company specializing in magnetic sensing, power ICs, and motor control solutions for automotive and industrial markets.
The A6262 product line is engineered specifically for automotive interior LED lighting - delivering high-accuracy, fault-tolerant current regulation in compact packages with integrated thermal and short-circuit protection.
FAQ
What is the maximum LED string voltage supported by the A6262KLYTR-T?
The A6262KLYTR-T supports LED strings with total forward voltage up to VIN – VDO. With minimum dropout of 660 mV at 40 mA and 50 V absolute max supply, it can drive up to three typical red LEDs (3 × 2.3 V = 6.9 V) or two white LEDs (2 × 3.2 V = 6.4 V) at full 100 mA while maintaining regulation. The A6262KLYTR-T must be operated within its 6–50 V VIN range and thermal limits.
How do I set the output current for each channel of the A6262KLYTR-T?
Output current for all four channels of the A6262KLYTR-T is set by a single external resistor (RREF) connected between IREF and GND. Using the formula ILAx = 15 × (1.2 V / RREF), a 167 Ω resistor yields ~90 mA per channel. The A6262KLYTR-T's internal 1.2 V reference and fixed gain ensure matched current without per-channel components.
Does the A6262KLYTR-T require external ballast resistors for current matching?
No, the A6262KLYTR-T achieves better than 5% current matching between LA1–LA4 outputs without ballast resistors due to matched internal current mirror architecture and shared reference. This eliminates component count, PCB area, and power loss associated with discrete ballasting - a key advantage of the A6262KLYTR-T in multi-string automotive lighting.
Can the A6262KLYTR-T operate with a 5 V supply?
No - the A6262KLYTR-T has a minimum operating supply voltage of 6 V per its Absolute Maximum Ratings and Functional Description. At 5 V, the internal regulators cannot maintain specified current accuracy or dropout performance. The A6262KLYTR-T requires ≥6 V to enable proper biasing of control circuitry and LAx current sources.
What happens when a short-to-ground occurs on one LAx pin of the A6262KLYTR-T?
When a short-to-ground is detected on any LAx pin (voltage drops below 1.2–1.8 V), the corresponding current regulator disables immediately while other channels remain fully operational. The A6262KLYTR-T sources a small monitoring current (~0.5–2 mA) from the disabled output and automatically re-enables regulation once the short is removed and LAx voltage rises above 1.9 V.
A6262KLYTR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 50V
- Voltage - Output:
- -
- Current - Output / Channel:
- 100mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
A6262KLYTR-T FAQ
1.How can I place an order for A6262KLYTR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A6262KLYTR-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 A6262KLYTR-T reliable?
The price and inventory of A6262KLYTR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A6262KLYTR-T is usually 5 days.
3.What payment methods are accepted for A6262KLYTR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A6262KLYTR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A6262KLYTR-T?
A6262KLYTR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A6262KLYTR-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 A6262KLYTR-T?
For technical support, including A6262KLYTR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A6262KLYTR-T requirements.
6.How does Aetrix verify that A6262KLYTR-T is sourced from the original manufacturer or authorized distributors?
All A6262KLYTR-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 A6262KLYTR-T meets industry standards.
7.What is the process for return or replacement of A6262KLYTR-T?
All A6262KLYTR-T units undergo pre-shipment inspection (PSI). If there is an issue with A6262KLYTR-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 A6262KLYTR-T part is unused and in its original packaging.
Return procedure for A6262KLYTR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A6262KLYTR-T Tags
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