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EQW020A0F1-S 参数 Datasheet PDF下载

EQW020A0F1-S图片预览
型号: EQW020A0F1-S
PDF下载: 下载PDF文件 查看货源
内容描述: 36 - 75VDC输入; 1.2Vdc至5V直流输出; 12A至25A输出 [36 - 75Vdc Input; 1.2Vdc to 5Vdc Output; 12A to 25A Output]
分类和应用:
文件页数/大小: 25 页 / 876 K
品牌: LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
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Data Sheet  
EQW012/020/023/025 Series, Eighth-Brick Power Modules:  
36 - 75Vdc Input; 1.2Vdc to 5Vdc Output; 12A to 25A Output  
December 12, 2008  
The amount of power delivered by the module is  
defined as the voltage at the output terminals  
multiplied by the output current. When using remote  
sense and trim, the output voltage of the module can  
be increased, which at the same output current would  
increase the power output of the module. Care should  
be taken to ensure that the maximum output power of  
the module remains at or below the maximum rated  
power (Maximum rated power = Vo,set x Io,max).  
Feature Description  
Remote On/Off  
Two remote on/off options are available. Positive logic  
turns the module on during a logic high voltage on the  
ON/OFF pin, and off during a logic low. Negative logic  
remote On/Off, device code suffix “1”, turns the  
module off during a logic high and on during a logic  
low.  
To turn the power module on and off, the user must  
supply a switch (open collector or equivalent) to  
control the voltage (Von/off) between the ON/OFF  
terminal and the VIN(-) terminal (Figure 40). Logic low  
is –0.7V Von/off 1.2V. The maximum Ion/off during  
a logic low is 1mA, the switch should be maintain a  
logic low level while sinking this current.  
SENSE(+)  
SENSE(–)  
VI(+)  
VI(-)  
VO(+)  
VO(–)  
IO  
SUPPLY  
LOAD  
II  
CONTACT  
RESISTANCE  
CONTACT AND  
DISTRIBUTION LOSSES  
During a logic high, the typical Von/off generated by the  
module is 15V, and the maximum allowable leakage  
current at Von/off = 15V is 10μA.  
Figure 41. Effective Circuit Configuration for  
remote sense operation.  
If not using the remote on/off feature:  
For positive logic, leave the ON/OFF pin open.  
For negative logic, short the ON/OFF pin to VIN(-).  
Output Voltage Set-Point Adjustment (Trim)  
Trimming allows the output voltage set point to be  
increased or decreased, this is accomplished by  
connecting an external resistor between the TRIM pin  
and either the VO(+) pin or the VO(-) pin (COM pin) .  
VIN(+)  
VO  
Ion/off  
VIN(+)  
VO(+)  
VOTRIM  
VO(-)  
ON/OFF  
Rtrim-up  
Von/off  
COM  
ON/OFF  
LOAD  
VIN(-)  
Rtrim-down  
VIN(-)  
Figure 40. Circuit configuration for using Remote  
On/Off Implementation.  
Figure 42. Circuit Configuration to Trim Output  
Voltage.  
Remote Sense  
Remote sense minimizes the effects of distribution  
losses by regulating the voltage at the remote-sense  
connections (See Figure 41). The voltage between  
the remote-sense pins and the output terminals must  
not exceed the output voltage sense range given in  
the Feature Specifications table:  
Connecting an external resistor (Rtrim-down) between  
the TRIM pin and the Vo(-) (or Sense(-)) pin  
decreases the output voltage set point. To maintain  
set point accuracy, the trim resistor tolerance should  
be ±0.1%.  
The following equation determines the required  
external resistor value to obtain a percentage output  
voltage change of Δ%  
[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] 0.5 V  
Although the output voltage can be increased by both  
the remote sense and by the trim, the maximum  
increase for the output voltage is not the sum of both.  
The maximum increase is the larger of either the  
remote sense or the trim.  
LINEAGE POWER  
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