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參數(shù)資料
| 型號： | PQ60018EGL25PNS-G |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, EIGHTH-BRICK PACKAGE-8 |
| 文件頁數(shù)： | 2/13頁 |
| 文件大小： | 544K |
| 代理商： | PQ60018EGL25PNS-G |
Product # PQ60018EGL25
Phone 1-888-567-9596
Doc.# 005-2EG618D Rev. E
1/22/08
Page 10
Input:
Output:
Current:
PPackage:
ackage:
35-75 V
1.8 V
25 A
Eighth-brick
T
Technical S
echnical Specification
pecification
age across the output (pins 8 and 4) to determine when it should
trigger, 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 that output OVP does not trigger, even during
load transients.
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
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
between Pin 6 and Pin 5 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
Rtrim-down =
(
511) - 10.22 (kW)
D%
where
D% = Vnominal – Vdesired x 100%
Vnominal
To increase the output voltage, the user should connect a resistor
between Pin 6 and Pin 7 (SENSE(+) input). For a desired increase
of the nominal output voltage, the value of the resistor should be
Figure C graphs the relationship between the trim resistor value
and Rtrim-up and Rtrim-down, showing the total range the output
voltage can be trimmed up or down.
Figure C: Trim Graph for 1.8Vout module
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection cir-
cuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally bypassed to eliminate noise.
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
system instability problem, described in more detail in the appli-
cation note titled “Input System Instability” available on the
SynQor website. The lockout circuitry is a comparator with DC
hysteresis. When the input voltage is rising, it must exceed the typ-
ical Turn-On Voltage Threshold value (listed on the specification
page) before the converter will turn on. Once the converter is on,
the input voltage must fall below the typical Turn-Off Voltage
Threshold value before the converter will turn off.
Output Current Limit: The maximum current limit remains con-
stant as the output voltage drops. However, once the impedance
of the short across the output is small enough to make the output
voltage drop below the specified Output DC Current-Limit
Shutdown Voltage, the converter turns off.
The converter then enters a “hiccup mode” where it repeatedly
turns on and off at a 5 Hz (nominal) frequency with a 5% duty
cycle until the short circuit condition is removed. This prevents
excessive heating of the converter or the load board.
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage
to the load circuit due to 1) excessive series resistance in output
current path from converter output pins to sense point, 2) a
release of a short-circuit condition, or 3) a release of a current
limit condition. Load capacitance determines exactly how high
the output voltage will rise in response to these conditions. After
200 ms the converter will automatically restart.
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The ther-
mal shutdown circuit is designed to turn the converter off when the
temperature at the sensed location reaches the Over-Temperature
Shutdown value. It will allow the converter to turn on again when
the temperature of the sensed location falls by the amount of the
Over-Temperature Shutdown Restart Hysteresis value.
Rtrim-up
(kW)
)
where
VOUT = Nominal Output Voltage
=
(
_ 511 _ 10.22
5.11VOUT(100+D%)
1.225D%
D%
1
10
100
1,000
10,000
0
2
4
6
8
10
12
14
16
18
20
T
ri
m
R
e
s
is
ta
n
c
e
(k
O
h
m
s
)
% increase Vout
% decrease Vout
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| PQ60018EKA25NKS-G | 制造商:SYNQOR 制造商全稱:SYNQOR 功能描述:Eighth-brick DC-DC Converter |
| PQ60018EKA25NNS-G | 制造商:SYNQOR 制造商全稱:SYNQOR 功能描述:Eighth-brick DC-DC Converter |
| PQ60018EKA25NRS-G | 制造商:SYNQOR 制造商全稱:SYNQOR 功能描述:Eighth-brick DC-DC Converter |
| PQ60018EKA25NYS-G | 制造商:SYNQOR 制造商全稱:SYNQOR 功能描述:Eighth-brick DC-DC Converter |
| PQ60018EKA25PKS-G | 制造商:SYNQOR 制造商全稱:SYNQOR 功能描述:Eighth-brick DC-DC Converter |
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