Phytec phyCORE-LPC2292/94, Hardware Manual

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phyCORE-LPC2292/94
92
©
PHYTEC Meßtechnik GmbH 2006 L-658e_5
The components at U12 and U13 guarantee electronic protection
against overvoltage and excessive current draw at pin 6 of P1A; in
particular:
•
Load detection and controlled voltage supply switch-on:
In order to ensure clear detection of the switch-on condition, the
connected device should cause a current draw of at least 10 mA
at pin 6. The controlled voltage supply switch-on prevents
voltage drop off on the phyCORE Carrier Board HD200.
•
Overvoltage Protection:
If the voltage at pin 6 exceeds the limiting value that can be
provided by the phyCORE Carrier Board HD200, the voltage at
pin 6 will be switched off immediately. This prevents damage to
the phyCORE Carrier Board HD200 as well as connected
modules and expansion boards.
•
Overload Protection:
If the current draw at pin 6 exceeds the limiting value of
approximately 150 mA, the voltage at pin 6 will be switched off
immediately. This prevents damage to the phyCORE Carrier
Board HD200 and its power adapter caused by current overload.
This configuration option provides the following possibility:
Jumper Setting Description
JP24 2 + 3 Electronically protected 5 V at pin 6 for supply of
external devices connected to P1A
Table 53: JP24 Power Supply to External Devices Connected to P1A on the
Carrier Board