A6263KLJTR-T - 4-Ch 100mA Linear LED Driver AEC-Q100 | Allegro
MPN： A6263KLJTR-T ✓ 啟用中A6263KLJTR-T 概覽
A linear LED driver (also called a linear current regulator or LED array driver) is a power-management IC that sinks a regulated DC current through one or more series LED strings. It sits hierarchically as: LED driver -> constant-current driver -> PMIC (Power Management IC) -> semiconductor. Compared with switching LED drivers, linear regulators add no EMI, no switching ripple, and no inductor, at the cost of higher dissipation when the LED forward voltage is well below the supply rail.
Key features of the A6263 include a wide 6 V to 50 V input range designed to survive 12 V automotive transients (start/stop, cold-crank, load-dump), an AEC-Q100 qualification for automotive use, integrated thermal protection, and a fault-tolerant topology that disconnects LEDs on single LED short. A single reference resistor sets the master current, simplifying BOM and layout.
Architecturally, the A6263 uses four matched current mirrors fed from a bandgap-trimmed reference; outputs are open-drain capable of pulling to VIN and each channel is independently monitored. The exposed pad on the SOIC-EP package provides a low thermal-resistance path essential for dissipating (VIN - VLED) x ILED at each output, supporting robust operation in sealed lamp modules.
Typical applications include automotive rear combination lamps, daytime running lights, interior ambient lighting, and architectural/sign illumination. It is also suited for indicator control and regulated current drive circuits where EMI-sensitive analog rails are nearby.
When designing with this device, ensure adequate copper on the exposed pad to keep junction temperature within the 150 C limit at worst-case VIN and full LED current. The fault output indicates abnormal conditions and should be wired to the host MCU or left open for standalone use.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for evaluation, sourcing, and PCB integration.
直接替換替代品，適用於 A6263KLJTR-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： A6263KLJTR-T （相同外形與佔位） — 差異在於 Number of Outputs, Package, Topology.
A6263KLJTR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
A6263KLJTR-1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
A6217KLJTR-1-T
✅ 直接替換聯絡詢價
查看資料表 →A6263KLJTR-T 最大額定值與電氣特性
| 拓撲 | Linear, Constant Current |
| 輸出數量 | 4 |
| Output Current per Channel | 100 mA (max) |
| Total LED Drive Current | 400 mA (max) |
| 輸入電壓範圍 | 6 V to 50 V |
| Output Current Accuracy | 5% |
| Channel-to-Channel Matching | < 10% |
| Dimming | Yes (linear via IREF) |
| Internal Driver | Yes |
| Current Set Resistor | Single external reference resistor |
| Protection Features | Thermal shutdown, LED short detection |
| AEC-Q100 Qualification | Yes (automotive grade) |
| 工作溫度範圍 | -40 C to +150 C (junction) |
| 封裝 | 8-pin SOIC with Exposed Pad (LJ), 3.90 mm |
| 安裝類型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Lead-Free / RoHS | Compliant |
A6263KLJTR-T 腳位配置
| 腳位 1 | VCC — Input supply voltage (6 V to 50 V) |
| 腳位 2 | OUT1 — Current output, channel 1 (up to 100 mA) |
| 腳位 3 | OUT2 — Current output, channel 2 (up to 100 mA) |
| 腳位 4 | OUT3 — Current output, channel 3 (up to 100 mA) |
| 腳位 5 | OUT4 — Current output, channel 4 (up to 100 mA) |
| 腳位 6 | IREF — Reference current set resistor |
| 腳位 7 | GND — Ground |
| 腳位 8 | FAULT/Thermal — Fault flag and thermal pad connection |
典型應用
A6263KLJTR-T 適用於 6 應用s: Automotive Rear Combination Lamps, Daytime Running Light (DRL) Module, Automotive Interior Ambient Lighting, Industrial 24 V LED Strip Driver, Signage and Channel Letter Illumination, Indicator and Status LED Arrays.
Automotive Rear Combination Lamps
The A6263KLJTR-T is ideal for automotive rear combination lamps where brake, tail, turn, and reverse functions are implemented as 4 separate LED strings. Each of the 4 outputs can drive a 100 mA string independently with 5% accuracy and better than 10% channel-to-channel matching, eliminating the need for ballast resistors. The 6 V to 50 V input range survives 12 V automotive transients including cold-crank, start/stop, and load-dump events, while the AEC-Q100 qualification validates the part for under-hood and exterior lamp modules with junction temperatures up to 150 C. The integrated thermal shutdown and LED short detection protect the lamp module against field failures.
推薦
Daytime Running Light (DRL) Module
The A6263KLJTR-T suits DRL modules where multiple LED strings are driven in parallel for redundancy and uniform brightness. With 400 mA total drive capability across 4 channels and linear topology, no switching EMI is introduced into adjacent RF receivers (keyless entry, AM/FM, satellite). The exposed pad (EP) on the SOIC package provides the low thermal resistance needed to dissipate (VIN - VLED) * ILED at each output, allowing sealed automotive lamp designs without external heatsinking. AEC-Q100 qualification and 50 V load-dump tolerance meet automotive reliability requirements for exterior lighting.
推薦
Automotive Interior Ambient Lighting
The A6263KLJTR-T drives multi-color interior ambient lighting with 4 independent channels per IC. Each output controls a separate LED color (typically red, green, blue, white) enabling smooth color mixing and dimming via the IREF reference current. The 4-channel architecture reduces component count versus discrete single-channel drivers, simplifying PCB layout in door-panel, dashboard, and footwell modules. Linear topology eliminates inductor audible noise (a concern in quiet cabin environments), while AEC-Q100 qualification and 50 V load-dump tolerance cover the full automotive electrical environment.
推薦
Industrial 24 V LED Strip Driver
The A6263KLJTR-T is suitable for industrial 24 V LED strip and architectural lighting applications where 4 independent constant-current channels are needed. The wide 6 V to 50 V input range accommodates 24 V industrial supply buses with significant transient headroom. The 100 mA per channel capability (400 mA total) supports typical LED strip currents, and the linear topology avoids the EMI that switching drivers would inject into nearby industrial sensors and control circuitry. The exposed pad SOIC package enables compact PCB designs with adequate thermal dissipation.
推薦
Signage and Channel Letter Illumination
The A6263KLJTR-T drives LED modules in signage and channel letter applications where 4 channels control different letter zones or colors. The single reference resistor simplifies current setting during signage installation and repair - technicians only adjust one resistor for the entire module. The 50 V input tolerance protects against supply transients in outdoor signage fed by long wiring runs. AEC-Q100 qualification, while automotive-targeted, also provides extended reliability margin for outdoor commercial signage with temperature swings from -40 C to +85 C ambient.
推薦
Indicator and Status LED Arrays
The A6263KLJTR-T is well-suited for status indicator panels where 4 LEDs per IC indicate system states (power, fault, activity, ready). The 5% current accuracy and 10% channel matching ensure uniform brightness across indicators, important for professional equipment appearance. The wide input range (6 V to 50 V) accepts power directly from 12 V or 24 V system rails without pre-conditioning. The exposed-pad SOIC package allows hand-soldering-friendly assembly for low-volume industrial equipment where automated placement may not be available.
推薦
推薦產品摘要
工程參考資料，適用於 A6263KLJTR-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 | A6263KLJTR | A6263KLJTR-1 | A6217KLJTR-1-T |
|---|---|---|---|---|
| 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 |
| Number of Outputs | 4 | 4 | 4 | 1 |
| Output Current per Channel | 100 mA | 100 mA | 100 mA | 1.5 A |
| Input Voltage Range | 6 V to 50 V | 6 V to 50 V | 6 V to 50 V | 6 V to 50 V |
| Topology | Linear | Linear | Linear | Linear |
| AEC-Q100 | Yes | No (commercial) | No (extended industrial) | Yes |
| Channel Matching | < 10% | < 10% | < 10% | N/A (single channel) |
| Current Set Resistor | Single external | Single external | Single external | Single external |
主要差異化特點
- AEC-Q100 qualified for automotive applications (對比A6263KLJTR (non-automotive grade))
- 4 independent 100 mA channels in single 8-pin SOIC-EP (對比A6217KLJTR-1-T (single channel 1.5 A))
- Linear topology with no EMI (對比Switching LED drivers)
設計說明
Estimated: At VIN = 13.5 V (automotive nominal) and 4 strings of 3 white LEDs at 100 mA each with VLED_total = 9 V, power dissipation is (13.5 - 9) * 0.4 = 1.8 W. The 8-SOIC-EP package requires at least 100 mm^2 of copper pour on the exposed pad to maintain junction temperature below 125 C at 85 C ambient. Insufficient copper is the most common field failure mode for linear LED drivers - always validate thermal performance on the final PCB layout before committing to production.
Place the IREF reference resistor as close to pin 6 as possible to minimize noise pickup and ground-loop errors. Use a 1% tolerance resistor to maintain the 5% output current accuracy specified in the datasheet. The exposed pad must be soldered to a continuous copper plane on top and bottom layers, stitched with thermal vias, to provide the low thermal resistance path required for reliable operation. Decouple VCC with a 1 uF X7R ceramic capacitor placed within 5 mm of pin 1.
Do not exceed 50 V on VCC even transiently - load-dump pulses above 50 V can permanently damage the device. If the application is connected directly to the automotive battery without transient suppression, add a TVS diode rated for 36 V working voltage to clamp load-dump pulses. Do not leave unused output pins floating - connect them to GND or to an active output to prevent fault conditions. The IREF pin must not exceed 6.5 V per the datasheet absolute maximum rating.
合規資訊
AEC-Q100 qualified for automotive applications. RoHS and REACH compliant per Allegro product page. Lead-free and halogen-free per package materials declaration.
