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参数资料
| 型号： | AP2186SG-13 |
| 厂商： | Diodes Inc |
| 文件页数： | 13/17页 |
| 文件大小： | 0K |
| 描述： | IC USB PWR SWITCH 1.5A DUAL 8SOP |
| 产品变化通告： | Copper Bond Wire Change 13/Jan/2012 |
| 标准包装： | 1 |
| 类型： | USB 开关 |
| 输出数： | 2 |
| Rds（开）： | 135 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 2.1A |
| 输入电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOP |
| 包装： | 标准包装 |
| 产品目录页面： | 1137 (CN2011-ZH PDF) |
| 其它名称： | AP2186SGDIDKR |
AP2186/ AP2196
Application Information (cont.)
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.
Power Supply
Downstream
USB Ports
3.3V
5V
2
0.1uF
IN
AP2186
OUT1
7
0.1uF
68uF
D+
D-
V BUS
GND
USB
Controller
8
3
5
4
FLG1
EN1
FLG2
EN2
GND
1
OUT2
6
0.1uF
68uF
D+
D-
V BUS
GND
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 AP2186/AP2196, 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 AP2186/AP2196 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 AP2186/AP2196 between the V CC 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.
AP2186/ AP2196
Document number: DS31815 Rev. 3 - 2
13 of 17
March 2013
? Diodes Incorporated
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