Technical Reference Notes

AEO_ALO40/35/30/20/10x48 Series

(Single Output 8

MODEL: AEO40x48 / ALO40x48 SERIES

SHEET 8 OF 30

JUNE 24, 2005 - REVISION B

Basic Operation and Features (continued)

OUTPUT OVER VOLTAGE PROTECTION (OVP)

The Over Voltage Protection circuit is non-latching - auto recovery mode. The output of the converter is terminated under an OVP

fault condition (Vo > OVP threshold). The converter will attempt to restart until the fault is removed. There is a 100ms lockout

period between restart attempts.

OVER CURRENT PROTECTION (OCP)

The Over Current Protection is non-latching - auto recovery mode. The converter shuts down once the output current reaches the

OCP range. The converter will attempt to restart until the fault is removed. There is a 100ms lockout period between restart

attempts.

OVER TEMPERATURE PROTECTION (OTP)

The Over Temperature Protection circuit will shutdown the converter once the average PCB temperature (See Figure 90B for OTP

reference sense point) reaches the OTP range. This feature prevents the unit from overheating and consequently going into thermal

runaway, which may further damage the converter and the end system. Such overheating may be an effect of operation outside the

given power thermal derating conditions. Restart is possible once the temperature of the sensed location drops to less than 110

°C.

REMOTE SENSE

The remote sense pins can be used to compensate for any voltage drops (per indicated max limits) that may occur along the

connection between the output pins to the load. Pin 7 (+Sense) and Pin 5 (-Sense) should be connected to Pin 8 (+Vout) and Pin 4

(Return) respectively at the point where regulation is desired. The combination of remote sense and trim adjust cannot exceed

maximum output power must not be exceeded.