Datasheet

Application Note
Created by Traco Electronic AG Arp.
www.tracopower.com
Date: September 14
th
, 2012 / Rev.: 1.1 /
Page 26 / 30
3W SINGLE & DUAL
OUTPUT
Input Source Impedance
The power module should be connected to a low ac-impedance input source. Highly inductive source
impedances can affect the stability of the power module. In applications where power is supplied over long
lines and output loading is high, it may be necessary to use a capacitor on the input to insure startup.
Capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a
good quality low Equivalent Series Resistance (ESR < 1.0Ω at 100 kHz) capacitor of a 10µF for the 5V input
devices and a 4.7µF for the 12V input devices.
Short Circuitry Protection
Continuous, hiccup and auto-recovery mode.
During short circuit, converter still shut down, The average current during this condition will be very low and the
device will be safe in this condition.
Thermal Consideration
The converter is designed to operate in a variety of thermal environments and sufficient cooling must be
provided to ensure reliable operation. Heat is removed by conduction from the pins to the PCB board, and by
convection through airflow across the converter. Proper cooling can be verified by measuring the point as the
figure below. The temperature at this location should not exceed 95°C. When operating, adequate cooling must
be provided to maintain the test point temperature at or below 95°C. Although the maximum point temperature
of the power module is 95°C, you can limit this temperature to a lower value for extremely high reliability.