WMSIC Electronic Components

UMW AO4805

ModelAO4805
PackageSOP-8
BrandUMW
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 24+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
UMW AO4805
Type
UMW
Minimum package
3000

Technical parameters

Electronic Component
UMW
Electronic Component
AO4805
Electronic Component
1
Package
SOP-8
Electronic Component
2 P
Electronic Component
MOSFET
Electronic Component
0.17g
Electronic Component
1
Electronic Component
BM0264254902
Operating Temperature
55℃~+150℃
Power Dissipation(Pd)
1.44W
Electronic Component
3000
Voltage(Vdss)
30V
Capacitor(Ciss)
2.076nF
Output Capacitor(Coss)
503pF
Gate (Qg)
39nC@10V

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

UMW AO4805 P沟道MOSFET产品概述

UMW(友台半导体)AO4805是一款双P沟道增强型MOSFET,采用SOP-8表面贴装封装,专为低压(≤30V)、中电流(≤8A)场景设计,具备低导通电阻、宽温度范围等特性,适用于消费电子、工业控制、电池供电设备等领域。

一、产品核心定位

AO4805定位于低压中功率开关/线性应用,集成2个独立P沟道MOSFET,可简化双路开关电路设计,同时兼顾体积与性能平衡:

  • 电压覆盖:漏源击穿电压30V,适配3.3V/5V/12V等低压系统;
  • 电流能力:连续漏极电流8A,满足小型电机、负载开关等中电流需求;
  • 封装优势:SOP-8封装体积紧凑,适合高密度PCB布局(如便携设备、小型模块)。

二、关键电气参数解析

1. 电压与电流规格

  • 漏源击穿电压(V₍DSS₎):30V(绝对最大值),确保系统过压时的可靠性,适配多数低压电源场景;
  • 连续漏极电流(I₍D₎):8A(25℃时),可稳定承载中功率负载电流,若散热设计合理(如PCB敷铜),高温下仍能保持可靠工作;
  • 阈值电压(V₍GS(th)₎):1.5V(I₍D₎=250μA时),属于低阈值P沟道MOSFET,支持3.3V/5V MCU直接驱动,无需额外电平转换电路。

2. 导通电阻(R₍DS(on)₎)

导通电阻是MOSFET导通损耗的核心指标,AO4805表现优异:

  • V₍GS₎=-10V时,R₍DS(on)₎=12mΩ;
  • V₍GS₎=-4.5V时,R₍DS(on)₎=16mΩ;
    低导通电阻可显著降低导通压降与功率损耗,提升电源效率(如电池供电设备的续航能力)。

3. 开关特性与电容参数

  • 栅极电荷量(Q₍g₎):39nC(V₍GS₎=-10V时),决定开关损耗大小,适合中速开关应用(如100kHz以下的DC-DC转换);
  • 输入/输出电容:C₍iss₎=2.076nF,C₍oss₎=503pF,电容参数匹配开关频率需求,避免高频下的性能衰减;
  • 反向传输电容(C₍rss₎):302pF,影响米勒效应,AO4805的C₍rss₎控制在合理范围,减少开关噪声。

4. 功率与温度特性

  • 耗散功率(P₍d₎):1.44W(单管,双管总功率可叠加),结合SOP-8封装的热阻特性,需通过PCB敷铜(如漏极引脚连接大面积铜箔)优化散热;
  • 工作温度范围:-55℃~+150℃(结温),覆盖工业级宽温需求,适配车载、户外设备等极端环境。

三、封装与散热设计

AO4805采用SOP-8表面贴装封装,尺寸小巧(典型尺寸:5.0mm×6.0mm),适合自动化贴装,同时具备以下散热特点:

  • 引脚布局合理:漏极引脚(D1/D2)与源极引脚(S1/S2)分离,便于PCB敷铜优化;
  • 热阻控制:结到环境热阻(R₍th(ja)₎)约为80℃/W(典型值),若采用4层PCB并在漏极引脚下敷铜(面积≥10cm²),热阻可降至约30℃/W,满足Pd=1.44W的散热需求。

四、典型应用场景

1. 低压电源系统

  • 3.3V/5V DC-DC转换器(上管P沟道MOSFET);
  • 线性稳压器的调整管(如低 dropout 稳压器)。

2. 负载开关与电源路径控制

  • 电池供电设备的电源通断控制(如笔记本电脑、便携式仪器);
  • 多负载切换电路(双P沟道集成简化双路开关设计)。

3. 小型电机驱动

  • 直流微型电机、步进电机的驱动(如智能家居设备、小型机器人);
  • 电机正反转控制(双P沟道配合N沟道MOSFET实现H桥)。

4. 工业与消费电子

  • 智能家居控制器的开关电路;
  • 小型工业传感器模块的电源管理;
  • 车载辅助设备(如USB充电口、氛围灯控制)。

五、性能优势总结

AO4805在低压中功率场景下具备以下核心优势:

  1. 低导通损耗:12mΩ@-10V的R₍DS(on)₎减少导通压降,提升电源效率;
  2. 低驱动兼容性:支持4.5V驱动,适配主流MCU直接控制;
  3. 宽温可靠性:-55℃~+150℃结温范围,满足极端环境应用;
  4. 集成化设计:双P沟道集成SOP-8封装,节省PCB空间;
  5. 成本效益:UMW品牌的工业级品质,适合量产应用。

综上,AO4805是一款兼顾性能、体积与成本的低压P沟道MOSFET,适用于多种中功率开关与线性应用场景。

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