WMSIC Electronic Components

GR(国睿) GR6405SNS08ARDQ

ModelGR6405SNS08ARDQ
PackageSOP-8
BrandGR
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
GR GR6405SNS08ARDQ
Type
GR
Minimum package
4000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
GR
Electronic Component
GR6405SNS08ARDQ
Electronic Component
1
Package
SOP-8
Electronic Component
LEDDriver
Electronic Component
0.387g
Electronic Component
1
Channel Count
2
Features
(OTP)
Electronic Component
BM0257111083
Electronic Component
10%
Electronic Component
Electronic Component
Output Current
350mA
Operating Voltage(DC)
4.5V~5.5V
Electronic Component
Electronic Component

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

GR6405SNS08ARDQ 线性降压恒流驱动芯片产品概述

GR6405SNS08ARDQ是国睿(GR)品牌推出的一款双路线性降压恒流驱动芯片,专为小功率LED驱动场景设计,集成过温保护、内置开关管等关键功能,以SOP-8贴片封装实现小型化布局,适配便携电子、小型照明等多类应用需求。

一、产品核心定位与应用场景

该芯片聚焦低功率、小型化LED驱动领域,核心解决“多LED通道恒流驱动+简化电路设计+高可靠性”的需求,典型应用覆盖:

  • 便携设备LED背光:智能手环、蓝牙耳机的状态指示灯/屏幕背光;
  • 小型LED照明:USB迷你台灯、卧室夜灯、车载氛围灯;
  • 消费电子状态指示:路由器、机顶盒、智能家居设备的多LED状态显示;
  • 电池供电设备:3节AA干电池(4.5V)或5V USB供电的LED驱动场景。

二、关键参数与性能特性

芯片的核心参数直接匹配小功率LED驱动的实际需求,关键特性如下:

  1. 宽适配输入电压:4.5V~5.5V直流输入,兼容主流5V USB电源(含轻微电压波动)、3节AA干电池(4.5V),无需额外电源转换电路;
  2. 双路恒流输出:2独立通道,每通道最大输出电流350mA,可驱动13串LED(单串电压39V),或并联多颗小电流LED;
  3. 内置过温保护(OTP):当芯片结温超过阈值(典型150℃)时,自动降低输出电流至安全范围,温度回落则恢复正常,避免过热损坏;
  4. 内置开关管:无需外置MOS管、电感等元件,简化BOM(仅需少量电容滤波),降低电路复杂度;
  5. 恒流精度:±10%典型值,满足普通LED驱动的亮度一致性要求,若需更高精度可通过外部电阻微调;
  6. 封装形式:SOP-8贴片封装,尺寸(5.2×6.2mm)小巧,适配高密度PCB布局,易焊接与批量生产。

三、设计优势与实际价值

相比同类开关型恒流驱动芯片,GR6405SNS08ARDQ在小功率场景下具备独特优势:

  1. 电路极简:仅需输入/输出滤波电容、电流设定电阻,无电感、续流二极管等元件,PCB布线更简单,减少生产故障点;
  2. 纹波极小:线性拓扑结构无开关噪声,输出电流纹波<50mV,适合对光效稳定性要求高的背光场景;
  3. 可靠性突出:OTP保护+宽电压适应,可应对电源波动、负载变化等异常情况,延长产品寿命;
  4. 成本可控:内置开关管降低外置器件成本,SOP-8封装的采购与焊接成本均低于复杂封装,适合量产;
  5. 小型化适配:封装尺寸小,可嵌入智能手环、迷你台灯等紧凑产品内部,不影响整体外观。

四、使用注意事项

为确保芯片稳定工作,设计与应用中需注意:

  1. 输入电压限制:避免输入电压超过5.5V(如5V电源过冲),可在输入端串联10Ω/0805电阻限流;
  2. 输出电流设定:每通道输出电流由外接电阻Rset决定(公式:Iout≈1.2V/Rset),需选择精度1%以上的电阻,避免电流偏差;
  3. 散热设计:SOP-8封装的散热能力有限,高负载(350mA)下需在PCB焊盘增加铜箔面积(建议≥10mm²),或贴散热片;
  4. 负载匹配:LED总电压需低于输入电压0.5V以上(如输入5V时,LED串电压≤4.5V),避免芯片压降不足导致输出异常。

五、总结

GR6405SNS08ARDQ是一款针对小功率、多通道LED驱动的高性价比芯片,以线性降压拓扑实现低纹波、简化电路,内置OTP保护提升可靠性,SOP-8封装适配小型化产品。其宽电压适配、双路恒流输出等特性,可快速满足便携电子、小型照明等领域的LED驱动需求,是量产设计中的实用选择。

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