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参数资料
| 型号： | Q2D30ZEY-N7C3 |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 2/14页 |
| 文件大小： | 248K |
| 代理商： | Q2D30ZEY-N7C3 |
Q2D Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
Dual Output
Rev. NOV 13, 2002
Page 10 of 14
Output Over-Current Protection (OCP)
The converter is protected against over-current or
short circuit conditions on both outputs.
Upon
sensing an over-current condition, the converter
will switch to constant current operation and
thereby begin to reduce output voltages. If, due
to current limit, the output voltage Vout1 (3.3V)
drops, than Vout2 (5.0V) will follow Vout1 with
less than 1V difference.
Drop on Vout2 output
due to current limit will not affect voltage on
Vout1.
For further load increase, if either Vout1
drops below 1 Vdc or Vout2 drops below 2 Vdc,
the converter will shut down.
Once the converter has shut down, it will attempt
to restart nominally every 100ms with a 2% duty
cycle.
The
attempted
restart
will
continue
indefinitely until the overload or short circuit
conditions are removed or the output voltage
Vout1 rises above 1 Vdc and Vout2 above 2 Vdc.
Output Over-Voltage Protection (OVP)
The converter will shut down if the output voltage
across either Vout1(+) (Pin 4) or Vout2(+) (Pin 7)
and RETURN (Pin 5) exceeds the threshold of the
OVP circuitry. The OVP protection is separate for
Vout1
and
Vout2
with
their
own
reference
independent of the output voltage regulation
loops. Once the converter has shut down, it will
attempt to restart every 100ms until the OVP
condition is removed.
Over-Temperature Protection (OTP)
The converter will shut down under an over-
temperature
condition
to
protect
itself
from
overheating caused by operation outside the
thermal derating curves, or operation in abnormal
conditions such as system fan failure.
The over-temperature protection circuit turns the
converter off when the temperature at a sensed
location
reaches
120°C
(typical).
Once
the
converter has shut down, it will restart when the
temperature at the sensed location falls below
110°C.
Safety Requirements
The
converters
meet
North
American
and
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 5-A fuse is recommended for use
with this product.
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
converters
to
several system level standards, primary of which
is
the
more
stringent
EN55022,
Information
technology
equipment
-
Radio
disturbance
characteristics
-
Limits
and
methods
of
measurement.
With the addition of a simple external filter (see
application notes), all versions of the Q2D family
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.
Please
contact
Power-One
Applications Engineering for testing details.
Thermal Considerations
The Q2D series converters are designed for
natural
or
forced
convection
cooling.
The
maximum
available
output
power
of
the
converters
is
determined
by
the
maximum
semiconductor junction temperature. To provide
reliable long-term operation of the converters,
Power-One limits maximum allowable junction
temperature to 120°C.
The graphs in Figures 14-20 show the maximum
output current of the Q2D series converters at
different
local
ambient
temperatures
at
both
natural and forced (longitudinal airflow direction,
from pin 3 to pin 4) convection.
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