A6260KLJTR-T - 350mA Linear LED Driver, AEC-Q100, 8-SOIC-EP
MPN： A6260KLJTR-T ✓ 啟用中A6260KLJTR-T 概覽
A linear LED driver (also called an LED current regulator or constant-current source) is a type of power management IC that maintains a fixed current through one or more series-connected LEDs by modulating a series pass element's voltage drop, rather than by switching. Linear LED drivers sit within the broader category of LED drivers, which themselves are part of the power management IC family. Unlike switching LED drivers, linear regulators introduce no EMI switching noise and require no inductor, making them ideal for noise-sensitive and space-constrained automotive lighting applications.
Key features include a wide 6 V to 40 V input range, low dropout allowing operation up to 3 V below supply, programmable current up to 350 mA via external RSENSE, PWM dimming control input, integrated LED short-circuit protection, thermal shutdown with current slew-rate limiting, and reverse-battery protection. Reverse-battery protection eliminates the need for an external blocking diode on the supply rail. The exposed thermal pad (EP) on the 8-SOIC package provides a low thermal resistance path critical for dissipating up to several hundred mW at full output.
The A6260 employs a bandgap-referenced control loop driving an internal DMOS pass transistor. The architecture combines a high-side current sense amplifier with a precision reference and error amplifier to regulate the LED current at 4% accuracy across the full operating temperature range. Current slew-rate limiting reduces EMI by controlling the inrush profile when the PWM dimming input is toggled. The integrated thermal shutdown protects the die under fault conditions.
Typical applications include automotive interior and exterior LED lighting (dome lights, instrument clusters, daytime running lights, brake/tail lamps), architectural and signage illumination, industrial LED strips, and emergency vehicle strobes. The AEC-Q100 qualification makes the part particularly suited for under-hood and chassis-mounted lighting modules.
When designing with this device, derate power dissipation by the SOIC-EP thermal resistance to keep the junction below 150 C. Place the RSENSE resistor close to the SENSE pin to minimize parasitic resistance, and connect the exposed pad to a copper pour to maximize heat sinking. The PWM dimming frequency should be selected above 100 Hz to avoid visible flicker.
This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 A6260KLJTR-T — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： A6260KLJTR-T （相同外形與佔位） — 差異在於 Automotive Qualification, Package, Topology.
A6260KLJ-T
✅ 直接替換📋 參考替代品（不在目錄中）
A6217KLJTR-1-T
✅ 直接替換✓ 有庫存
$0.43 / 單位
查看資料表 →A6260KLJTR-T-1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
A6260KLJTR-T-S
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
A6260KLJTR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
A6260KLJTR-T 最大額定值與電氣特性
| Product Type | Linear LED Current Regulator |
| 輸出電流 (最大) | 350 mA |
| 輸出數量 | 1 |
| 輸入電壓範圍 | 6 V to 40 V |
| Load Voltage (Max above GND) | Vsupply - 3 V (dropout) |
| Current Accuracy | 4% |
| Dimming Method | PWM input |
| Maximum Shutdown Current | 10 uA |
| 拓撲 | Linear (series pass) |
| Current Setting | External low-power sense resistor |
| Protection Features | Reverse battery, LED short-circuit, thermal shutdown, current slew-rate limiting |
| 封裝 | 8-SOIC-EP (suffix LJ), 3.90 mm body |
| Automotive Qualification | AEC-Q100 |
| Lead Finish | Pb-free, 100% matte-tin leadframe plating |
| 安裝類型 | Surface Mount |
A6260KLJTR-T 腳位配置
| 腳位 1 | VCC — Supply input (6 V to 40 V) |
| 腳位 2 | PWM/EN — PWM dimming logic input / enable |
| 腳位 3 | GND — Ground |
| 腳位 4 | SENSE — Current-sense resistor connection |
| 腳位 5 | RSENSE — Current programming resistor to GND |
| 腳位 6 | LOAD — LED string load connection |
| 腳位 7 | NC — Not connected (per datasheet) |
| 腳位 8 | NC — Not connected (per datasheet) |
典型應用
A6260KLJTR-T 適用於 6 應用s: Automotive Interior LED Lighting, Automotive Exterior Lighting (DRL, Brake, Tail), Architectural and Signage LED Illumination, Industrial LED Strip and Task Lighting, Emergency Vehicle Strobe and Warning LEDs, Instrument Cluster Backlighting.
Automotive Interior LED Lighting
The A6260KLJTR-T's 350 mA drive capability, 6 V to 40 V supply tolerance, and AEC-Q100 qualification make it well suited to automotive dome, map, courtesy, and ambient LED lighting. The integrated reverse-battery protection eliminates the need for an external blocking diode on the supply rail, simplifying the BOM. A single external RSENSE resistor sets the current to 4% accuracy, while the PWM dimming input allows seamless integration with body-control modules driving interior scenes. The 8-SOIC-EP package with exposed thermal pad enables compact PCB placement behind headliners and inside door trim modules without an additional heatsink. Unlike switching drivers, the linear topology introduces zero EMI, easing compliance with automotive radiated-emissions standards for cabin electronics.
推薦
Automotive Exterior Lighting (DRL, Brake, Tail)
For daytime running lights, brake lamps, and tail-lamp clusters, the A6260KLJTR-T provides the constant-current regulation that preserves LED brightness uniformity and lifetime. The 40 V supply rating absorbs load-dump transients common on 12 V automotive buses, and the integrated thermal shutdown protects the die under fault conditions. Driving 1 to 3 series-connected high-brightness LEDs at currents up to 350 mA matches the typical string architecture used in modern automotive rear lamps. The 3 V dropout budget gives designers headroom to add an extra LED in series without violating the compliance window at cold-crank battery voltages. PWM dimming supports stop-and-tail intensity separation with a single driver stage.
推薦
Architectural and Signage LED Illumination
Architectural LED strips and signage modules benefit from the A6260KLJTR-T's linear topology, which delivers flicker-free constant current without the EMI signature of switching converters. The 6 V to 40 V supply range accepts both 12 V and 24 V constant-voltage LED drivers commonly used in commercial lighting installations. Programmable current up to 350 mA lets a single RSENSE value cover a range of high-brightness LED bins, simplifying inventory. The exposed-pad SOIC-EP package handles the dissipation of typical 24 V-supply architectural runs where the linear drop is moderate. Reverse-battery protection on the supply pin safeguards installations that may be serviced or rewired by non-electrical technicians.
推薦
Industrial LED Strip and Task Lighting
Inside industrial control cabinets and operator consoles, the A6260KLJTR-T provides a compact constant-current source for high-brightness LED strips used as task or backlight illumination. The wide supply tolerance handles 24 V industrial rails with substantial transient tolerance, while the 4% current accuracy prevents brightness mismatch between parallel strips. The 8-SOIC-EP footprint fits small PCBs adjacent to PLCs and HMIs where board area is constrained. Integrated thermal shutdown and LED short-circuit protection guard against wiring faults in factory environments. The PWM dimming input accepts logic-level signals directly from a 3.3 V or 5 V MCU without level shifting.
推薦
Emergency Vehicle Strobe and Warning LEDs
Emergency vehicle light bars and warning beacons require robust, AEC-Q100-qualified LED drivers that survive harsh electrical environments. The A6260KLJTR-T's 40 V rating tolerates load-dump events on 12 V emergency-vehicle buses, and its PWM input accepts the 100 Hz to 1 kHz flash patterns used in strobe controllers. The reverse-battery protection is critical for vehicles that may be jump-started across wiring faults. Driving high-brightness LED modules at 350 mA delivers the optical intensity required for SAE Class 1 warning devices. The exposed thermal pad keeps junction temperatures in check during continuous full-intensity operation in summer conditions.
推薦
Instrument Cluster Backlighting
Automotive instrument clusters use dozens of small high-brightness LEDs for backlit gauges, pointers, and telltale indicators. The A6260KLJTR-T's compact 8-SOIC-EP footprint allows multiple drivers to be placed across a cluster PCB without competing for board area, while its PWM dimming input accepts the day/night brightness commands from the body-control module. The 4% current accuracy maintains uniform backlight intensity across all gauges, and the wide supply range handles cranking transients without flicker. The linear topology's zero-EMI signature is especially valuable behind radio receivers and GPS antennas where switching noise could couple into sensitive RF paths.
推薦
推薦產品摘要
工程參考資料，適用於 A6260KLJTR-T — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | A6260KLJ-T | A6217KLJTR-1-T | A6260KLJTR-T-1 |
|---|---|---|---|---|
| Brand | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems |
| Package | 8-SOIC-EP (LJ) | 8-SOIC-EP (LJ) - same | 8-SOIC-EP (LJ) - same | 8-SOIC-EP (LJ) - same |
| Output Current (Max) | 350 mA | 350 mA | 1 A (higher-current variant) | 350 mA |
| PWM Dimming | Yes | Yes | Yes | Yes |
| Automotive Grade (AEC-Q100) | Yes | Yes | Yes | Yes |
| Lead Finish | Pb-free matte tin | Pb-free matte tin | Pb-free matte tin | Pb-free matte tin |
主要差異化特點
- Integrated reverse-battery protection eliminates external blocking diode (對比Discrete LED driver designs with external MOSFET + Schottky diode)
- Same 8-SOIC-EP (LJ) footprint as the higher-current A6217 family (對比A6217KLJTR-1-T)
- AEC-Q100 qualified for automotive lighting (對比Industrial-grade linear LED drivers)
設計說明
Estimated: At Vsupply = 24 V, VLED = 9 V (3 series LEDs) and ILED = 350 mA, the linear regulator dissipates approximately (24 - 9) * 0.350 = 5.25 W. The 8-SOIC-EP package requires a substantial copper pour on the EP to keep the junction below 150 C. Use at least 1 square inch of 2 oz copper tied to the EP and stitch vias to the inner ground plane for chassis-mounted automotive applications.
Place the RSENSE resistor as close as possible to the SENSE pin and the device GND to minimize parasitic resistance that would degrade current accuracy. Keep the high-current LED loop (LOAD -> LED string -> GND) physically short and away from sensitive analog or RF traces, because even though the A6260 is a linear regulator, the load-current return path can inject common-mode noise on the ground plane.
Do not exceed the 40 V absolute maximum on VCC, even briefly - automotive load-dump transients can reach 35-40 V and destroy the part. Add a TVS diode (e.g., SMAJ33CA) on the supply rail for additional margin. Ensure the LED string forward voltage stays at least 3 V below VCC to maintain regulation; if VIN drops during cold-crank, the regulator will fall out of regulation and the LEDs will dim.
合規資訊
Pb-free 100% matte-tin leadframe plating per Allegro datasheet. AEC-Q100 automotive qualification confirmed via Arrow and DigiKey product listings. Halogen-free status not explicitly stated in the verified snippets.
