AP2166SG-13(2009) View Datasheet(PDF) - Diodes Incorporated.
Part Name
Description
Manufacturer
AP2166SG-13 Datasheet PDF : 17 Pages
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Application Note (Continued)
AP2166/AP2176
1A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
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
AP2166/AP2176, 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 AP2166/AP2176 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 AP2166/AP2176 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.
Marking Information
(1) SOP-8L
Logo
Part Number
6 : Active Low
7 : Active High
(2) MSOP-8L-EP
Logo
Part Number
6 : Active Low
7 : Active High
( Top view )
8765
AP21X X
YY WW X X
1 234
6 : 2 Channel
G : Green
YY : Year : 08, 09,10~
WW : Week : 01~52; 52
represents 52 and 53 week
X : Internal Code
( Top view )
87 65
YWXE
AP21X X
12 34
A~Z : Green
MSOP-8L-EP
Y : Year : 0~9
W : Week : a~z : 1~26 week;
A~Z : 27~52 week; Z represents
52 and 53 week
6 : 2 Channel
AP2166/AP2176 Rev 1
15 of 17
www.diodes.com
APRIL 2009
© Diodes Incorporated
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