DC1575A Linear Technology, DC1575A Datasheet - Page 3

• Manufacturer Part Number: DC1575A
• Description: LTC4362-1/LTC4362-2 Overvoltage/Overcurrent Protector With LatchOff/Auto-Retry
• Manufacturer: Linear Technology
• Series: -r

Specifications of DC1575A

• Design Resources: DC1575A Schematic DC1575 Design Files
• Main Purpose: Overvoltage/Overcurrent Protection
• Embedded: No
• Utilized Ic / Part: LTC4362-2
• Primary Attributes: -
• Secondary Attributes: -
• Kit Application Type: Power Management
• Application Sub Type: Overvoltage Protection
• Features: Demonstrates Two Protection Schemes Selected At JP2, Provides Connection For USB Protection
• Lead Free Status / Rohs Status: Not applicable / Not applicable

OPERATION
The DC1575A is used to evaluate the LTC
protection confi gurations selected at JP2 for overvoltage
and overcurrent protection, or overvoltage, overcurrent,
and negative voltage protection. The device in need of
protection is connected to the OUT test point or to the
USB output connector J2. An input supply is connected
at V
ON Control
The ON pin on the LTC4362 is controlled at JP1. Select
ENABLE to enable the LTC4362, or DISABLE to enter a
low current sleep mode.
Protection OV/OC
The fi rst selection at JP2 is OV/OC protection which pro-
tects against overvoltage and overcurrent. The LTC4362
turns on an internal N-channel MOSFET when the input
voltage is below the overvoltage threshold. An internal
current sense resistor provides overcurrent detection.
In the case of an overcurrent, the LTC4362-2 used in the
DC1575A automatically tries to turn the internal MOSFET
back on. An amber input LED indicates if the input supply
is on while a green OUT LED indicates the gate is on and
input is connected to the output.
IN
or a USB source is connected at J1.
®
4362 in two
Protection OV/OC/NV
The second selection at JP2 is OV/OC/NV protection which
protects against overvoltage, overcurrent and negative
voltage. The LTC4362 turns on an internal N-channel
MOSFET when the input voltage is below the overvoltage
threshold. A P-channel MOSFET is driven by the GATEP pin
of the LTC4362 to protect the output against an inadvertent
negative voltage connection at the input. An internal current
sense resistor provides overcurrent detection. In the case
of an overcurrent, the LTC4362-2 used in the DC1575A
automatically retries to turn the internal MOSFET back on.
The amber V
a green OUT(B) LED indicates the gate is on and input is
passed over to the output. A red –V
negative input voltage is present.
USB Protection
DC1575A also provides connection for USB protection.
First connect a USB device with a USB cable at J2. Select
the protection type at JP2 and match this with JP3. Select
ENABLE at JP1. The USB source can then be connected
at J1.
DEMO MANUAL DC1575A
IN
LED indicates if the input supply is on while
IN
LED indicates if a
dc1575af
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