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參數(shù)資料
| 型號(hào)： | PQ60050QGA20PKS-G |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, QUARTER BRICK PACKAGE-8 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 1015K |
| 代理商： | PQ60050QGA20PKS-G |
Product # PQ60050QGA20
Phone 1-888-567-9596
Doc.# 005-2QG650D Rev. E
07/15/09
Page 9
Technical Specification
Input:
Output:
Current:
Package:
48 V
5.0 V
20 A
Quarter-brick
BASICOPERATIONANDFEATURES
The PowerQor series converter uses a twostage power conversion
topology. The first stage is a buckconverter that keeps the output
voltage constant over variations in line, load, and temperature. The
second stage uses a transformer to provide the functions of input/
output isolation and voltage stepdown to achieve the low output
voltage required.
Both the first stage and the second stage switch at a fixed frequency
for predictable EMI performance. Rectification of the transformer’s
output is accomplished with synchronous rectifiers. These devices,
whichareMOSFETswithaverylowon-stateresistance,dissipatefar
less energy than Schottky diodes. This is the primary reason that the
PowerQor converter has such high efficiency, even at very low output
voltages and very high output currents.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. Since a heatsink is not required,
the PowerQor converter does not need a metal baseplate or potting
material to help conduct the dissipated energy to the heatsink. The
PowerQor converter can thus be built more simply and reliably using
high yield surface mount techniques on a PCB substrate.
The PowerQor series of halfbrick, quarterbrick and eighth
brick converters uses the industry standard footprint and pinout
configuration.
See Product Summary web page for options.
CONTROLFEATURES
REMOTE ON/OFF (Pin 2):TheON/OFFinput,Pin2,permitsthe
user to control when the converter is on or off. This input is refer
encedtothereturnterminaloftheinputbus,Vin(-).Therearetwo
versions of the converter that differ by the sense of the logic used
fortheON/OFFinput.
Inthepositivelogicversion,theON/OFFinputisactivehigh(meaning
thatahighturnstheconverteron).Inthenegativelogicversion,the
ON/OFFsignalisactivelow(meaningthatalowturnstheconverter
on).FigureAdetailsfivepossiblecircuitsfordrivingtheON/OFFpin.
FigureBisadetailedlookoftheinternalON/OFFcircuitry.
REMOTE SENSE(+) (Pins 7 and 5):TheSENSE(+)inputscorrect
for voltage drops along the conductors that connect the converter’s
output pins to the load.
Pin7shouldbeconnectedtoVout(+)andPin5shouldbeconnected
toVout(-)atthepointontheboardwhereregulationisdesired.A
remote connection at the load can adjust for a voltage drop only as
large as that specified in this datasheet, that is
[Vout(+)-Vout(-)]–[Vsense(+)-Vsense(-)] <
SenseRange%xVout
Pins7and5mustbeconnectedforproperregulationoftheoutput
voltage. If these connections are not made, the converter will deliver
an output voltage that is slightly lower than its specified value.
Note: the output over-voltage protection circuit senses the voltage
acrosstheoutput(pins8and4)todeterminewhenitshouldtrigger,
not the voltage across the converter’s sense leads (pins 7 and 5).
Therefore, the resistive drop on the board should be small enough so
thatoutputOVPdoesnottrigger,evenduringloadtransients.
Open Collector Enable Circuit
Figure A: Various circuits for driving the ON/OFF pin.
Figure B: Internal ON/OFF pin circuitry
Remote Enable Circuit
Direct Logic Drive
Negative Logic
(Permanently Enabled)
Positive Logic
(Permanently Enabled)
ON/OFF
Vin(_
)
ON/OFF
Vin(_
)
ON/OFF
5V
TTL/
CMOS
Vin(_
)
ON/OFF
Vin(_)
Vin(_
)
TTL
5V
50k
274k
Vin(+)
ON/OFF
Vin(_)
50k
100pF
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| PQ60050QGA20PNS | 制造商:SYNQOR 制造商全稱:SYNQOR 功能描述:20 Amp, No Heatsink, Isolated DC/DC Converter |
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