ALO04B48N-6S Datasheet, PDF (7/26 Pages) Astec America, Inc – AEO/ALO Single Output 8th Brick: Baseplate or Open-Frame Module

Technical Reference Notes
AEO_ALO04/12/20/25x48 Series
(Single Output 8^th Brick)
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
V_IN is in the voltage range of 33 to 36VDC. Likewise, it has also been programmed to turn-off when V_IN 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 R_{adj_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
Radj_up
=
^{5.1 ×}


Voset × (100 +
1.225× ∆%
∆%)
−
510
∆%
−

10.2

ΚΩ
-Vin
Enable
+Vin
-Vout
-Sense
Vadj
+Sense
+Vout
Radj_up
Rload
Figure 3. External resistor configuration to increase the outputs
Equation (1b): 1.2V
Radj_up
=
^{5.1 ×}


Voset ×
0.6 ×
(100 +
∆%
∆%)
−
510
∆%
−

10.2

ΚΩ
To DECREASE the output, external R_{adj_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):
Radj_down

510
∆%
−
10.2^ ⋅ kΩ

Where: ∆% = percent change in output voltage
-Vin
Enable
+Vin
-Vout
-Sense
Vadj
+Sense
+Vout
Radj_down
Rload
Figure 4. External resistor configuration to increase the outputs
MODEL: AEO_ALO04/12/20/25x48 SERIES
AUGUST 25, 2005 - REVISION G
SHEET 7 OF 26