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參數(shù)資料
| 型號： | PQ60018ETL45PNS-G |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 81 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, EIGHTH-BRICK PACKAGE-8 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 1098K |
| 代理商： | PQ60018ETL45PNS-G |
Product # PQ60018ETL45
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2ET618F Rev. B
06/01/09
Page 10
Input:
Output:
Current:
Package:
35-75 V
1.8 V
45 A
Eighth-brick
Technical Specification
OpenCollectorEnableCircuit
Figure A: Various circuits for driving the ON/OFF pin.
Figure B: Internal ON/OFF pin circuitry
Remote Enable Circuit
Direct Logic Drive
NegativeLogic
(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
10k
ON/OFF
Vin(_)
100pF
BASICOPERATIONANDFEATURES
The single stage power converter switches at a fixed frequency
forpredictableEMIperformance.Rectificationofthetransformer’s
output is accomplished with synchronous rectifiers. These devices,
whichareMOSFETswithaverylowon-stateresistance,dissipate
far 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 pot-
ting 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 eighth-brick, quarter-brick and half-brick
converters uses the industry standard footprint and pin-out con-
figuration.
CONTROLFEATURES
REMOTE ON/OFF (Pin 2):TheON/OFFinput,Pin2,permits
the user to control when the converter is on or off. This input is
referencedtothereturnterminaloftheinputbus,Vin(-).Thereare
two versions of the converter that differ by the sense of the logic
usedfortheON/OFFinput.
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on).Inthenegativelogic
version, the ON/OFF signal is active low (meaning that a low
turns the converter on).FigureAdetailsfivepossiblecircuitsfor
drivingtheON/OFFpin.FigureBisadetailedlookoftheinternal
ON/OFFcircuitry.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’soutputpinstotheload.
Pin7shouldbeconnectedtoVout(+)andPin5shouldbecon-
nected to Vout(-) at the point on the board where regulation is
desired. 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
Pins7and5mustbeconnectedforproperregulationoftheout-
putvoltage.Iftheseconnectionsarenotmade,theconverterwill
deliver an output voltage that is slightly higher than its specified
value.
Note:theoutputover-voltageprotectioncircuitsensesthevoltage
across the output (pins 8 and 4) to determine when it should trig-
ger,notthevoltageacrosstheconverter’ssenseleads(pins7and
5). Therefore, the resistive drop on the board should be small
enough so that output OVP does not trigger, even during load
transients.
OUTPUT VOLTAGE TRIM (Pin 6):TheTRIMinputpermitsthe
user to adjust the output voltage across the sense leads up or down
according to the trim range specifications.
To decrease the output voltage, the user should connect a resistor
betweenPin6andPin5(SENSE(-)input).Foradesireddecrease
of the nominal output voltage, the value of the resistor should be
Rtrim-down =
(511) -10.22 (kW)
D
%
where
D% = Vnominal–Vdesired
x100%
Vnominal
Application Section
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