Technical Reference Notes
AEQ15AF48 Series
(Dual Output Quarter Brick - Baseplate)
Basic Operation and Features
(continued)
OUTPUT ENABLE
The AEQ15 comes with an Enable pin (PIN 2) which is primarily used to turn ON/OFF the converter. Both a Positive (no part
number suffix required) and Negative (suffix “N” required) Enable Logic option is being offered (see Part Numbering Scheme
in Table 1).
For Positive Enable, the converter is turned on when the Enable pin is at logic HIGH or left open. The unit turns off when the
Enable pin is at logic LOW or directly connected to -V
IN
. On the other hand, the Negative Enable version turns on when the
Enable pin is at logic LOW or directly connected to -V
IN
. The unit turns off when the Enable pin is at Logic HIGH.
OUTPUT OVER VOLTAGE PROTECTION (OVP)
The Over Voltage Protection circuit will shut down the entire converter if any of the two output voltages exceeds the OVP
threshold limits. The converter will automatically recover once the fault is removed.
OUTPUT OVER CURRENT PROTECTION (OCP)
The Over Current Protection circuit will shutdown the converter if any of the load current of either output reaches the OCP
threshold limits. The unit will automatically recover by going into a hiccup mode until the cause of the over current condition
is removed. Note that in Figures 5 and 6, Channel 1 is 3.3V and Channel 2 is 5V.
Figure 5. I
O2
(5V) = OCP, I
O1
(3V3) = 1A.
Figure 6. I
O2
(5V) = 1A, I
O1
(3V3) = OCP.
MODEL: AEQ15AF48 SERIES
JUNE 16, 2003 - REVISION 01
SHEET 9 OF 15
ASTEC [ Astec America, Inc ]
