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Allegro MicroSystems A6260SLJTR-T
- Part No.:
- A6260SLJTR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
A6260SLJTR-T.pdf
- Description:
- IC LED DRVR LIN PWM 350MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:372
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Product details
Overview
A6260SLJTR-T from Allegro MicroSystems is a linear programmable current regulator IC designed for automotive high-brightness LED driving, delivering up to 350 mA with ±4% accuracy, 6–40 V input range, and low dropout voltage (2.25 V typ at 350 mA), used in 12 V automotive lighting systems with PWM dimming and thermal protection.
For engineers reviewing the A6260SLJTR-T datasheet, A6260SLJTR-T pinout, A6260SLJTR-T application, or A6260SLJTR-T equivalent, key selection criteria include ambient temperature range (–20 °C to 85 °C), AEC-Q100 qualification, reverse battery protection, shutdown current (<10 µA), and thermal monitor adjustability via THTH pin.
Technical Context
The A6260SLJTR-T integrates a high-side switch (LA) and low-side current sink (LC/LSS) with internal 102 mV reference for precise current regulation via external sense resistor. Its functional block includes slew-rate-limited PWM control logic, overcurrent detection (–500 mA trip), and dual-stage thermal management: current reduction starting at 90–120 °C (TJM) and full shutdown at 165 °C (TJF).
It supports parallel operation with dedicated sense resistors per device and enables incandescent lamp replacement via direct EN-to-VIN connection. Protection features include LA/LC short-to-supply/ground detection, reverse battery tolerance (–14 V), and short-circuit monitoring with ISCU sourcing (–1.1 mA typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Drive Current | Up to 350 mA with ±4% accuracy - enables stable brightness across temperature and supply variation |
| Supply Voltage Range | 6 V to 40 V (–14 V min) - supports automotive 12 V net with cold-crank and load-dump resilience |
| Dropout Voltage | 2.25 V typ at 350 mA - allows single white LED drive down to 6 V supply |
| Shutdown Current | 1 µA to 10 µA - ensures <10 µA sleep mode draw for always-connected automotive modules |
| Thermal Shutdown Threshold | 165 °C with 15 °C hysteresis - prevents permanent damage during sustained overload or poor heatsinking |
| PWM Slew Control | Rise/fall times of 50–120 µs - reduces EMI during dimming without compromising response |
| Ambient Temp Range | –20 °C to +85 °C - qualified for interior and non-under-hood automotive applications |
Pinout & Package
Package: 8-pin SOICN (suffix LJ) with exposed thermal pad for enhanced power dissipation; lead-free, 100% matte-tin plating; JEDEC MS-012BA compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SENSE | High-impedance current sense input | References internal 102 mV bandgap to set ILC = 102 mV / RS; requires Kelvin connection to top of sense resistor |
| 2 GND | Ground reference | Primary return path for control circuitry and sense resistor; must connect near bottom of RS |
| 3 THTH | Thermal threshold adjust | Open-circuit default TJM ≈ 98 °C; pull-down increases TJM, pull-up decreases TJM per VTHTH equation |
| 4 EN | Enable/PWM control input | Active-high logic input; enables PWM dimming and <10 µA shutdown mode when held low |
| 5 VIN | Main supply input | Power source for internal regulators; requires 100 nF ceramic bypass capacitor close to pin |
| 6 LA | LED anode switch output | Protected high-side current source; handles short-to-ground detection and current limiting |
| 7 LC | LED cathode current sink | Controlled low-side sink; works with LSS to regulate current; monitors short-to-supply conditions |
| 8 LSS | Low-side sense return | Current sink connection to ground side of sense resistor; completes regulation loop with SENSE |
| Pad | Exposed thermal pad | Primary thermal path to PCB; requires soldered connection to large copper area and thermal vias |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualification | Qualified for automotive applications per Grade 3 (–40 °C to 125 °C junction), though A6260SLJTR-T variant rated for –20 °C to 85 °C ambient |
| Reverse battery protection | Withstands –14 V on VIN - eliminates need for external reverse-polarity diode in 12 V automotive systems |
| Programmable thermal foldback | TJM adjustable from ~90 °C to >150 °C via THTH pin resistor network - enables custom thermal derating for specific LED thermal mass |
| Short-circuit recovery with ISCU | After LA/LC short detection, sources –1.1 mA from LA to lift VLC above 1.2 V release threshold - enables automatic re-enable without system reset |
| Parallel operation support | Multiple A6260SLJTR-T units can share LED string load with independent sense resistors - scales current beyond 350 mA without master-slave coordination |
Applications
| Automotive Exterior Lighting | Interior Ambient Lighting |
|---|---|
Use Scenario: Driving 1–3 white LEDs in tail lamps or side markers powered from 12 V automotive net with cold-crank (6 V) and load-dump (40 V) transients. IC Role / Device Role / Timing Role: Linear current regulator providing constant 350 mA with ±4% accuracy, thermal foldback, and reverse-battery protection. Use Value: Eliminates need for external current-sense amplifier and discrete protection FETs while maintaining AEC-Q100 compliance. | Use Scenario: Dimmable footwell or dashboard lighting using PWM from microcontroller, requiring flicker-free brightness control and low standby power. IC Role / Device Role / Timing Role: PWM-enabled current sink with 50–120 µs slew control and <10 µA shutdown current. Use Value: Enables smooth digital dimming without color shift and zero-power-off capability for always-on vehicle modules. |
| Commercial Vehicle Marker Lights | Industrial Status Indicators |
Use Scenario: High-reliability marker lights on trucks/buses operating across –20 °C to 85 °C ambient with wide-input 12/24 V systems. IC Role / Device Role / Timing Role: Robust LED driver with overcurrent detection (–500 mA), short-circuit recovery, and thermal shutdown at 165 °C. Use Value: Survives vibration-induced wiring faults and extended high-temp operation without field failure. | Use Scenario: Panel-mounted status indicators in industrial HMIs where long-term stability and fault tolerance are critical under variable supply conditions. IC Role / Device Role / Timing Role: Precision current regulator with 102 mV reference and 4% accuracy, supporting sense resistor values from 240 mΩ to 3 Ω. Use Value: Maintains consistent LED intensity across unit-to-unit variation and aging, reducing calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED current regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A6260KLJTR-T | Same die, wider ambient range (–40 °C to 125 °C), AEC-Q100 Grade 1 qualified | Required for under-hood or engine-compartment applications; not suitable for cost-sensitive interior-only designs | Select A6260KLJTR-T when full automotive temperature grade is mandatory |
| LM3409QMY/NOPB | Switching buck LED controller (not linear); higher efficiency but requires inductor, diode, and compensation network | Better for >350 mA or >40 V input; unsuitable where EMI sensitivity or board space precludes inductors | Choose LM3409QMY/NOPB only when thermal constraints prevent linear regulator use |
Compared with A6260SLJTR-T, A6260KLJTR-T offers broader temperature capability and full Grade 1 qualification but at higher cost; LM3409QMY/NOPB provides higher efficiency in high-power or high-input-voltage scenarios but adds design complexity and EMI risk absent in the linear A6260SLJTR-T.
Availability
A6260SLJTR-T is available at Aetrix Electronics and suitable for automotive exterior lighting, interior ambient lighting, and commercial vehicle marker lights requiring stable component supply despite end-of-life status.
Supply support for A6260SLJTR-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 precision motion control solutions for automotive and industrial markets.
The A6260 product line delivers linear LED current regulators optimized for automotive-grade reliability, featuring integrated protection, thermal management, and AEC-Q100 qualification for high-brightness lighting systems.
FAQ
Is A6260SLJTR-T still available for purchase?
Yes, A6260SLJTR-T is available through Aetrix Electronics as a last-time buy item. It is discontinued for new designs effective September 30, 2024, and samples are no longer offered. Customers should plan for migration to A6260KLJTR-T or alternative solutions based on application requirements.
What is the maximum LED string voltage supported by A6260SLJTR-T?
A6260SLJTR-T supports LED strings with forward voltage up to VIN – 2.25 V (typical dropout at 350 mA). With 40 V max supply, it can drive up to three white LEDs (≈9 V total VF) while maintaining regulation. The device does not regulate above its dropout limit - minimum VIN must exceed VLED + VDO.
How does the thermal monitor in A6260SLJTR-T reduce LED current?
The A6260SLJTR-T thermal monitor begins reducing regulated current at TJM (90–120 °C), typically lowering output by 4% per °C until reaching 25% at TJL (110–150 °C). This foldback protects both the IC and LEDs from thermal runaway. TJM is adjustable via the THTH pin voltage or external resistor network.
Can A6260SLJTR-T be used without the THTH pin connection?
Yes, A6260SLJTR-T operates with THTH left open, defaulting to TJM ≈ 98 °C. Leaving THTH unconnected enables basic thermal foldback without external components. For customized thresholds, connect a resistor between THTH and GND (to raise TJM) or VIN (to lower TJM), per the datasheet equation.
Does A6260SLJTR-T support parallel operation for higher current?
Yes, A6260SLJTR-T supports parallel operation: multiple units can drive the same LED string when each has its own sense resistor. This configuration scales total current beyond 350 mA without master-slave signaling. Ensure matched sense resistors and symmetric PCB layout for balanced current sharing.
A6260SLJTR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- -
- Current - Output / Channel:
- 350mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
A6260SLJTR-T FAQ
1.How can I place an order for A6260SLJTR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A6260SLJTR-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 A6260SLJTR-T reliable?
The price and inventory of A6260SLJTR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A6260SLJTR-T is usually 5 days.
3.What payment methods are accepted for A6260SLJTR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A6260SLJTR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A6260SLJTR-T?
A6260SLJTR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A6260SLJTR-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 A6260SLJTR-T?
For technical support, including A6260SLJTR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A6260SLJTR-T requirements.
6.How does Aetrix verify that A6260SLJTR-T is sourced from the original manufacturer or authorized distributors?
All A6260SLJTR-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 A6260SLJTR-T meets industry standards.
7.What is the process for return or replacement of A6260SLJTR-T?
All A6260SLJTR-T units undergo pre-shipment inspection (PSI). If there is an issue with A6260SLJTR-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 A6260SLJTR-T part is unused and in its original packaging.
Return procedure for A6260SLJTR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A6260SLJTR-T Tags
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