參數(shù)資料
型號(hào)： ALO20Y48S
元件分類： 電源模塊
英文描述： 1-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE
封裝： EIGHTH BRICK, PACKAGE-8
文件頁(yè)數(shù)： 24/26頁(yè)
文件大?。?/td> 909K
代理商： ALO20Y48S
Technical Reference Notes
AEO_ALO04/12/20/25x48 Series
(Single Output 8th Brick)
MODEL: AEO_ALO04/12/20/25x48 SERIES
SHEET 7 OF 26
AUGUST 25, 2005 - REVISION G
+Vin
-Vin
Enable
-Vout
+Vout
-Sense
+Sense
Vadj
Rload
Radj_up
Figure 3. External resistor configuration to increase the outputs
+Vin
-Vin
Enable
-Vout
+Vout
-Sense
+Sense
Vadj
Rload
Radj_down
Figure 4. External resistor configuration to increase the outputs
Basic Operation and Features
INPUT UNDER VOLTAGE LOCKOUT
To prevent any instability to the converter, which may affect the end system, the converter have been designed to turn-on once
VIN is in the voltage range of 33 to 36VDC. Likewise, it has also been programmed to turn-off when VIN drops down to 31 to
34VDC
OUTPUT VOLTAGE ADJUST/TRIM
The converter comes with a TRIM pin (PIN 6), which is used to adjust the output by as much as 90% to 110% of its set point.
This is achieved by connecting an external resistor as described below.
To INCREASE the output, external Radj_up resistor
should be connected between TRIM PIN (Pin6) and
+SENSE PIN (Pin 7). Please refer to Equation (1) for the
required external resistance and output adjust
relationship.
Equation (1a): 1.5V to 12V
Equation (1b): 1.2V
To DECREASE the output, external Radj_down resistor
should be connected between TRIM pin (Pin 6) and
-SENSE PIN (Pin 5). Please refer to Equation (2) for the
required external resistance and output adjust
relationship.
Equation (2):
Where:
% = percent change in output voltage
Radj_down
510
%
10.2
k
Radj_up
5.1 Voset
×
100
%
+
(
)
×
0.6
%
×
510
%
10.2
=Κ
Radj_up
5.1 Voset
×
100
%
+
(
)
×
1.225
%
×
510
%
10.2
=Κ
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