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PQ24150QGA07NRS 参数 Datasheet PDF下载

PQ24150QGA07NRS图片预览
型号: PQ24150QGA07NRS
PDF下载: 下载PDF文件 查看货源
内容描述: 100瓦,无需散热器,隔离式DC / DC转换器 [100 Watts, No Heatsink, Isolated DC/DC Converter]
分类和应用: 转换器
文件页数/大小: 13 页 / 673 K
品牌: SYNQOR [ SYNQOR WORLDWIDE HEADQUARTERS ]
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Technical Specification  
Quarter  
24V 15V  
6.7A  
out  
in  
Brick  
Figure C graphs this relationship between R  
The output voltage can be trimmed down as much as 20%.  
and .  
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 trip, particularly during tran-  
sients.  
trim-down  
10,000  
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 +10%/-20%  
1,000  
100  
10  
PROTECTION FEATURES  
0
2
4
6
8
10  
12  
14  
16  
18  
20  
Input Under-Voltage Lockout: The converter is  
designed to turn off when the input voltage is too low, help-  
ing avoid an input system instability problem, described in  
more detail below. The lockout circuitry is a comparator with  
dc hysteresis. When the input voltage is rising, it must  
exceed a typical value of 16V before the converter will turn  
on. Once the converter is on, the input voltage must fall  
below a typical value of 14.5V before the converter will turn  
off.  
% Decrease in Output Voltage  
Figure C: Trim Down Graph for 15.0Vout  
A resistor connected between Pin 6 and Pin 7 will increase  
the output voltage. For a desired increase of percent of the  
nominal output voltage, the value of this resistor should be  
Output Current Limit: The current limit does not change  
appreciably 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 approximately 60% of  
its nominal value, the converter turns off.  
5.11VOUT(100+%)  
1.225%  
511  
_
_
R
=
trim-up  
where  
(k)  
10.22  
)
(
%  
VOUT = Nominal Output Voltage  
The converter then enters a 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 pre-  
vents excessive heating of the converter or the load board.  
Figure D graphs this relationship between Rtrim-up and .  
The output voltage can be trimmed up as much as 10%.  
Output Over-Voltage Limit: If the voltage across the  
output pins exceeds the O.V. threshold, the converter will  
immediately stop switching. This prevents damage to the  
load circuit due to 1) a sudden unloading of the converter,  
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.  
100,000  
10,000  
1,000  
100  
Thermal Shutdown: The PowerQor series has a temper-  
ature sensor located such that it senses the average temper-  
ature of the converter. The thermal shutdown circuit is  
designed to turn the converter off when the temperature at  
the sensed location reaches 125°C. It will allow the con-  
0
1
2
3
4
5
6
7
8
9
10  
% Increase in Output Voltage  
Figure D: Trim Up Graph for 15.0Vout  
Product # PQ24150QGA07  
Phone 1-888-567-9596  
Doc.# 005-2QG215D_A  
3/1/02  
Page 10