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參數(shù)資料
| 型號： | PQ55530HEB08NKS-G |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 400 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, HALF-BRICK PACKAGE-8 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大?。?/td> | 630K |
| 代理商： | PQ55530HEB08NKS-G |
Product # PQ55530HEB08
Phone 1-888-567-9596
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 11
T
Technical S
echnical Specification
pecification
Input:
Output:
Current:
PPackage:
ackage:
38-55 V
53 V
7.6 A
Half-brick
OUTPUT VOLTAGE TRIM (Pin 7): 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 7 and Pin 6 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
Rtrim-down =
(
100%) - 2 (kW)
D
where
D% = Vnominal – Vdesired x 100%
Vnominal
To increase the output voltage, the user should connect a resistor
between Pin 7 and Pin 8 (SENSE(+) input). For a desired increase
of the nominal output voltage, the value of the resistor should be
Figure B 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 B: Trim Graph for 53Vout 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
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the appli-
cation note titled “Input System Instability”. The lockout circuitry
is a comparator with DC hysteresis. When the input voltage is ris-
ing, it must exceed the typical 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: If the load current is increased to the
current limit threshold, the current will be limited at that value,
and the output voltage will decrease as the load resistance is low-
ered. When the load current is decreased below the current limit
point, the voltage will recover to the normal, regulated level.
Note: If the unit is held in overcurrent and the load is suddenly
reduced to zero, an output voltage overshoot can occur and pos-
sibly trip the overvoltage protection.
Output Over-Voltage Protection: If the voltage across the
output pins exceeds the Output Over-Voltage Protection threshold,
the converter will immediately shut down and latch off. To reset
this latched fault condition, either the ON/OFF pin must be tog-
gled from on to off and back on again or the input power must
be removed and re-applied.
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The
thermal 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.
(k
W)
Rtrim-up =
(
Vnominal – 2) x VDES + VNOM
1.225
VDES - VNOM
1
10
100
1,000
10,000
100,000
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 in Vout
% Decrease in Vout
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