Datasheet

Application Note
Created by Traco Electronic AG Arp. www.tracopower.com Date: July 28
th
, 2009 / Rev.: 1.0 / Page 27 / 32
150W Single Output
Output Over Current Protection
TEP 150WI series employ a fixed current limit to prevent damage to components within the converters, and will also protect the
load provided that the current limiting crossover point is set at a current value that the load can handle without damage.
Normally, the current limit is maintained at approximately 105~120 percent of rated current for TEP 150WI series. If the output
load current is over rating, the output current will keep in a constant value. And the output voltage will fall.
All of the TEP 150WI series current limiting supplies are self restoring; that is, when the overload is removed or corrected, the
output voltage is automatically restored to the previously set value.
Otherwise, if the output resistance is become short, it will operate in hiccup protection. The details are shown below.
Notes:
 CV Region: In normal operation. The output current in spec.
Condition: Resistance Load > Vout / Iout (CC Point)
 CC Region: If the output load current is over rating, the output current will keep in a constant value. And the output voltage
will fall.
Condition: Resistance Load < Vout / Iout (CC Point)
 Hiccup Protection: If the output resistance is become short. It will operate in hiccup protection.
Condition: Vout < 4.3V (typ.) to Output Short. (TEP 150-xx12WI, TEP 150-xx13WI)
Vout < 8.0V (typ.) to Output Short. (TEP 150-xx15WI, TEP 150-xx16WI)
Vout < 13V (typ.) to Output Short. (TEP 150-xx18WI)
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 can be
safety in this condition.
Output Over Voltage Protection
The output over-voltage protection consists of circuitry that monitors the voltage on the output terminals. If the voltage on the
output terminals exceeds the over-voltage protection threshold, then the module enter the non-latch hiccup mode.
TEP 150-2412WI
TEP 150-4812WI
Vout & Iout Curve
TEP 150-2413WI
TEP 150-4813WI
Vout & Iout Curve
TEP 150-2415WI
TEP 150-4815WI
Vout & Iout Curve
TEP 150-2416WI
TEP 150-4816WI
Vout & Iout Curve
TEP 150-2418WI
TEP 150-4818WI
Vout & Iout Curve