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AP2152SG-U PDF预览

AP2152SG-U

更新时间： 2024-02-09 07:56:18
品牌 Logo 应用领域
美台 - DIODES 驱动光电二极管接口集成电路驱动器
页数 文件大小 规格书
17页 495K
描述
Buffer/Inverter Based Peripheral Driver, 2 Driver, 0.5A, PDSO8, GREEN, SOP-8

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AP2152SG-U 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP, SOP8,.25针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.62
驱动器位数：2接口集成电路类型：BUFFER OR INVERTER BASED PERIPHERAL DRIVER
JESD-30 代码：R-PDSO-G8JESD-609代码：e3
湿度敏感等级：3端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
输出电流流向：SINK最大输出电流：0.5 A
标称输出峰值电流：0.5 A封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260电源：3/5 V
认证状态：Not Qualified子类别：Peripheral Drivers
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：40Base Number Matches：1

AP2152SG-U 数据手册

 浏览型号AP2152SG-U的Datasheet PDF文件第11页浏览型号AP2152SG-U的Datasheet PDF文件第12页浏览型号AP2152SG-U的Datasheet PDF文件第13页浏览型号AP2152SG-U的Datasheet PDF文件第15页浏览型号AP2152SG-U的Datasheet PDF文件第16页浏览型号AP2152SG-U的Datasheet PDF文件第17页 
AP2142/AP2152  
0.5A DUAL CHANNEL CURRENT-LIMITED POWER  
SWITCH  
Application Note (Continued)  
Thermal Protection  
Thermal protection prevents the IC from damage when heavy-overload or short-circuit faults are present for  
extended periods of time. The AP2142/AP2152 implements a thermal sensing to monitor the operating  
junction temperature of the power distribution switch. Once the die temperature rises to approximately 140°C  
due to excessive power dissipation in an over-current or short-circuit condition the internal thermal sense  
circuitry turns the power switch off, thus preventing the power switch from damage. Hysteresis is built into  
the thermal sense circuit allowing the device to cool down approximately 25°C before the switch turns back  
on. The switch continues to cycle in this manner until the load fault or input power is removed. The FLG  
open-drain output is asserted when an over-temperature shutdown or over-current occurs with 7-ms deglitch.  
Under-voltage Lockout (UVLO)  
Under-voltage lockout function (UVLO) keeps the internal power switch from being turned on until the power  
supply has reached at least 1.9V, even if the switch is enabled. Whenever the input voltage falls below  
approximately 1.9V, the power switch is quickly turned off. This facilitates the design of hot-insertion systems  
where it is not possible to turn off the power switch before input power is removed.  
Host/Self-Powered HUBs  
Hosts and self-powered hubs (SPH) have a local power supply that powers the embedded functions and the  
downstream ports (see Figure 2). This power supply must provide from 5.25V to 4.75V to the board side of  
the downstream connection under both full-load and no-load conditions. Hosts and SPHs are required to  
have current-limit protection and must report over-current conditions to the USB controller. Typical SPHs are  
desktop PCs, monitors, printers, and stand-alone hubs.  
Figure 2. Typical Two-Port USB Host / Self-Powered Hub  
Generic Hot-Plug Applications  
In many applications it may be necessary to remove modules or pc boards while the main unit is still  
operating. These are considered hot-plug applications. Such implementations require the control of current  
surges seen by the main power supply and the card being inserted. The most effective way to control these  
surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in  
which a power supply normally turns on. Due to the controlled rise times and fall times of the  
AP2142/AP2152, these devices can be used to provide a softer start-up to devices being hot-plugged into a  
powered system. The UVLO feature of the AP2142/AP2152 also ensures that the switch is off after the card  
has been removed, and that the switch is off during the next insertion.  
By placing the AP2142/AP2152 between the VCC input and the rest of the circuitry, the input power reaches  
these devices first after insertion. The typical rise time of the switch is approximately 1ms, providing a slow  
voltage ramp at the output of the device. This implementation controls system surge current and provides a  
hot-plugging mechanism for any device.  
AP2142/AP2152 Rev. 2  
14 of 17  
OCTOBER 2008  
www.diodes.com  
© Diodes Incorporated  
1...11121314151617

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