Datasheet

Application Note
Created by Traco Electronic AG Arp.
www.tracopower.com
Date: September 24
th
, 2018 / Rev.: 1.5 /
Page 6 / 23
2W, Single and Dual Output
Vout
Pi (Input Power)
Iocp
Remote On/Off Control
Only one type of remote on/off control is available for TMR. The module will turn on during the ctrl pin left open or high impedance between ctrl pin
and -Vin pin. The module will turn off if the control pin is applied with a current of 2 - 4 mA.
In off condition the input current is app. 2.5 mA max.
Positive Logic: Negative Logic:
Output over current protection
When excessive output currents occur in the system, circuit protection is required on all converters. Normally, overload current is maintained at
approximately 115~175% percent of rated current.
The TMR converters have a fold-back over current protection. Fold back current protection reduces the load current during over current condition.
The figure below shows a typical curve. Since the over current protection is a fold-back characteristic the highest power dissipation occurs at point
S. During start-up this product provides less output current, hence the output rises slower, or the power supply may not start up at all if the load
current during start up is larger than the fold back current.
Short Circuitry Protection
Continuous, hiccup and auto-recovery mode. During short circuit, converter will shut down and will switch on again to detect if the short circuit is
still present or not. The average current during this condition will be very low and the device will be safe in short circuit condition. Due to that is the
TMR converters indefinite short circuit protected.
●
●
+Input
-Input
3 mA current
source
Ctrl
1K
DC-DC OFF
+Input
-Input
3 mA current
source
Ctrl
1K
DC-DC ON
S (Iout, max, Pi, max)