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dc1505af
DEMO MANUAL DC1505A
QUICK START PROCEDURE
OPERATION
The DC1505A is used to evaluate the LTC4360 in three
protection configurations selected at JP1. The device in
need of protection is connected to one of the three OUT test
points or to the USB output connector J2. An input supply
is connected at V
IN
or a USB source is connected at J1.
ON
Control
The
ON
pin for protection (A) with the LTC4360-1 is
controlled at JP2. Select ENABLE to enable the selected
protection, or DISABLE to enter a low current sleep mode.
Protection (A) OV
The first selection at JP1 is protection (A) OV which pro-
tects against overvoltage. The LTC4360 turns on a single
N-channel MOSFET when the input voltage is below the
overvoltage threshold. An amber input LED indicates if
the input supply is on while a green OUT(A) LED indicates
the gate is on and the input is passed over to the output.
Protection (B) OV/NV
The second selection at JP1 is protection (B) OV/NV which
protects against overvoltage and negative voltage. The
LTC4360 turns on an N-channel MOSFET when the input
voltage is below the overvoltage threshold. A P-channel
MOSFET is driven by the GATEP pin of the LTC4360-2 to
protect the output against an inadvertent negative voltage
connection at the input. The amber V
IN
LED indicates if the
input supply is on while a green OUT(B) LED indicates the
gate is on and the input is passed over to the output. A red
–V
IN
LED indicates if a negative input voltage is present.
Protection (C) OV/NV/RC
The third selection at JP1 is protection (C) OV/OC/NV/RC
which protects against overvoltage, overcurrent, nega-
tive voltage and reverse current. The LTC4360 turns on
back-to-back N-channel MOSFETs when the input voltage
is below the overvoltage threshold. The back-to-back
N-channel MOSFETs blocks reverse current feeding in to
the input. A P-channel MOSFET is driven by the GATEP
pin of the LTC4360-2 to protect the output against an
inadvertent negative voltage connection at the input. The
amber V
IN
LED indicates if the input supply is on while a
green OUT(C) LED indicates the gate is on and the input
is passed over to the output. The red –V
IN
LED indicates
if a negative input voltage is present.
USB Protection
DC1505A also provides connection for USB protection.
First connect a USB device with a USB cable at J2. Select
the protection type at JP1 and match this with JP3. Select
ENABLE at JP2. The USB source can then be connected
at J1.
