SQ24X03150 Power-One, SQ24X03150 Datasheet - Page 6

• Manufacturer Part Number: SQ24X03150
• Description: Sq24t/s03150 Dc-dc Converter 19-36 Vdc Input; 15 Vdc Output @ 3.3 A
• Manufacturer: Power-One

preventing deep discharging of batteries used in
telecom applications.
Output Overcurrent Protection (OCP)
The converter is protected against overcurrent or
short-circuit conditions. Upon sensing an overcurrent
condition, the converter will switch to constant
current operation and thereby begin to reduce output
voltage. When the output voltage drops below 50%
of the nominal value of output voltage, the converter
will shut down.
Once the converter has shut down, it will attempt to
restart nominally every 100 ms with a typical 1-2%
duty cycle The attempted restart will continue
indefinitely until the overload or short circuit
conditions are removed or the output voltage rises
above 50% of its nominal value.
Output Overvoltage Protection (OVP)
The converter will shut down if the output voltage
across Vout(+) (Pin 8) and Vout(-) (Pin 4) exceeds
the threshold of the OVP circuitry. The OVP circuitry
contains its own reference, independent of the output
voltage regulation loop. Once the converter has shut
down, it will attempt to restart every 100 ms until the
OVP condition is removed.
Overtemperature Protection (OTP)
The
overtemperature condition to protect itself from
overheating caused by operation outside the thermal
derating curves, or operation in abnormal conditions
such as system fan failure. After the converter has
cooled to a safe operating temperature, it will
automatically restart.
Safety Requirements
The
International safety regulatory requirements per
UL60950 and EN60950. Basic Insulation is provided
between input and output.
To comply with safety agencies requirements, an
input line fuse must be used external to the
converter. A 6 A fuse is recommended for use with
this product.
If one input fuse is used for a group of modules, the
maximum fuse rating should not exceed 15 A.
SQ converters are UL approved with up to a 15 A
fuse.
Electromagnetic Compatibility (EMC)
EMC requirements must be met at the end-product
system level, as no specific standards dedicated to
EMC characteristics of board mounted component
dc-dc converters exist. However, Power-One tests its
JAN 21, 2004 revised to AUG 23, 2006
converters
converter
will
meet
shut
North
down
American
under
SQ24T/S03150 DC-DC Converter Data Sheet
and
an
Page 6 of 15
19-36 VDC Input; 15 VDC Output @ 3.3 A
converters to several system level standards,
primary of which is the more stringent EN55022,
Information
disturbance characteristics - Limits and methods of
measurement.
With the addition of a simple external filter (see
application notes), all versions of the SQ Series of
converters pass the requirements of Class B
conducted emissions per EN55022 and FCC, and
meet at a minimum, Class A radiated emissions per
EN 55022 and Class B per FCC Title 47CFR, Part
15-J.
Engineering for details of this testing.
Please
technology
contact
Power-One
equipment
www.power-one.com
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