參數(shù)資料
型號(hào): PQ60280HEB13NRS-G
廠商: SYNQOR INC
元件分類: 電源模塊
英文描述: 1-OUTPUT 360 W DC-DC REG PWR SUPPLY MODULE
封裝: ROHS COMPLIANT PACKAGE-9/8
文件頁數(shù): 3/13頁
文件大?。?/td> 802K
代理商: PQ60280HEB13NRS-G
Product # PQ60280HEA13
Phone 1-888-567-9596
Doc.# 005-2HE628P Rev. A
04/17/06
Page 11
T
Technical S
echnical Specification
pecification
Input:
Output:
Current:
PPackage:
ackage:
35-75 V
28 V
12.8 A
Half-brick
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 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 28Vout 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* 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 output current exceeds the
"Output DC Current Limit Inception" point*, then a fast linear cur-
rent limit controller will reduce the output voltage to maintain a
constant output current. There is no minimum operating output
voltage. The converter will run with low on-board power dissi-
pation down to zero output voltage. A redundant circuit will shut-
down the converter if the primary current limit fails.
Back-Drive Current Limit: If there is negative output current
of a magnitude larger than the "Back-Drive Current Limit while
Enabled" specification*, then a fast back-drive limit controller will
increase the output voltage to maintain a constant output current.
If this results in the output voltage exceeding the "Output Over-
Voltage Protection" threshold*, then the unit will shut down. The
full I-V output characteristic can be seen in Figure 19.
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 dam-
age to the load circuit due to 1) excessive series resistance in out-
put 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.
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.
Start-up Inhibit Period: If any protection feature causes the
converter to shut down, the converter will attempt to restart after
2ms (typical), the "Startup Inhibit Period".* On initial applica-
tion of input voltage, with the on/off pin set to enable the con-
verter, the "Turn-On Time"* will increase by only 2ms.
0.0
0.1
1.0
10.0
100.0
1,000.0
10,000.0
100,000.0
0
5
10
15
20
25
30
35
40
45
50
T
ri
m
R
e
s
is
ta
n
c
e
(k
O
h
m
s
)
% Increase in Vout
% Decrease in Vout
(k
)
Rtrim-up =
(
Vnominal – 2) x VDES + VNOM
1.225
VDES - VNOM
* See specifications page for details.
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