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參數(shù)資料
| 型號(hào)： | MQFL-270-12D-Z-ES |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 120 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | MODULE-12 |
| 文件頁(yè)數(shù)： | 5/19頁(yè) |
| 文件大小： | 3903K |
| 代理商： | MQFL-270-12D-Z-ES |
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Product # MQFL-270-12D
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005043 Rev. B
02/07/11
Page 13
Output:
Current:
±12V
10A
MQFL-270-12D
Application Section
OUTPUT VOLTAGE TRIM: If desired, it is possible to increase
or decrease the MQFL dual converter’s output voltage from
its nominal value. To increase the output voltage a resistor,
Rup, should be connected between the TRIM pin (pin 10) and
the OUTPUT RETURN pin (pin 8), as shown in Figure D. The
value of this resistor should be determined according to the
following equation:
Rup = 10 x
( Vout–2.5 –2xVnom+5 )
Vnom – Vout
where:
Vnom = the converter’s nominal output voltage,
Vout = the desired output voltage (greater than Vnom), and
Rup is in kiloOhms (k).
The maximum value of output voltage that can be achieved
is 0.5V above the nominal output.
To decrease the output voltage a resistor, Rdown,
should be connected between the TRIM pin and the
POSITIVE OUTPUT pin (pin 7), as shown in Figure D. The
value of this resistor should be determined according to the
following equation:
Rup = 10 x
[ Vnom –1 ] x[ Vout–2.5 – 5 ]
2.5
Vnom – Vout
where:
Vnom = the converter’s nominal output voltage,
Vout = the desired output voltage (less than Vnom), and
Rup is in kiloOhms (k).
As the output voltage is trimmed up, it produces a greater
voltage stress on the converter’s internal components
and may cause the converter to fail to deliver the desired
output voltage at the low end of the input voltage range at
the higher end of the load current and temperature range.
Please consult the factory for details. Factory trimmed
converters are available by request.
270 Vdc
Load
MQFL
+VIN
IN RTN
CASE
ENA 1
SYNC OUT
SYNC IN
ENA 2
SHARE
TRIM
– VOUT
OUT RTN
+VOUT
1
2
3
4
5
6
12
11
10
9
8
7
open
means
on
open
means
on
Rup
Rdown
+
–
+
Figre E: Change in Output Voltage Graph.
INPUT UNDER-VOLTAGE LOCKOUT: The MQFL converter
has an under-voltage lockout feature that ensures the converter
will be off if the input voltage is too low. The threshold of
input voltage at which the converter will turn on is higher that
the threshold at which it will turn off. In addition, the MQFL
converter will not respond to a state of the input voltage unless
it has remained in that state for more than about 200s. This
hysteresis and the delay ensure proper operation when the
source impedance is high or in a noisy enviroment.
1.0
10.0
100.0
1,000.0
10,000.0
-2
-1.5
-1
-0.5
0
0.5
1
Change in Vout (V)
Tr
im
R
es
is
ta
nc
e
(k
O
hm
s)
Trim Down Configuration
Trim Up Configuration
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