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參數(shù)資料
| 型號： | PQ60012EKA30NKS-G |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 36 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, EIGHTH BRICK PACKAGE-8 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 4056K |
| 代理商： | PQ60012EKA30NKS-G |
Product # PQ60012EKx30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005860 Rev. 1
08/24/10
Page 13
Technical
Specification
PQ60012EKx30
Applications Section
0
10
20
30
40
50
60
70
80
90
100
1.08
1.12
1.16
1.2
1.24
1.28
1.32
Tr
im
Re
si
st
an
ce
(k
)
Decrease in Vout
Increase in Vout
Figure C: Trim Graph for 1.2Vout module
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). To increase
the output voltage, the user should connect a resistor between
Pin 6 and Pin 7 (SENSE(+) input).For a desired change of the
nominal output voltage, the value of the resistor should be:
R
trim = |
V
DES
| - 1 (kΩ)
V
NOM - VDES
where
VNOM = Nominal Voltage
VDES = Desired Voltage
(Vertical bars indicate absolute value)
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 circuit 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 application note titled “Input System Instability”. The
lockout circuitry is a comparator with DC hysteresis. When
the input voltage is rising, 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: Once the output current reaches
the current-limit point, the converter is in the cycle-by-cycle
current limit mode for a short time that the typical value is
210s. If the over current no longer exists during this short
time, the converter resumes the normal condition. If the
over current still persists after this short time, the converter
enters a “hiccup mode” where it repeatedly turns on and
off at a 5 Hz (nominal) frequency until the over current
condition is removed. The dual advantages of this design
are that a short term overload will not cause a hiccup mode
restart and it prevents excessive heating of the converter or
the load board in extended over current condition.
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 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.
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