Industrial Power Supplies
Single Output 1500 Watt
TF1500 Family
TF1500 Application Note v1019
Copyright © 2019 SL Power Electronics Corp. All rights reserved.
Page 9
Fig. 09: TURN ON DELAY AT 115VAC 100%.
Fig. 11: TURN ON DELAY AT 230VAC 100%.
CH1: Output Voltage.
CH3: Input Voltage.
CH4: Output Current.
CH1: Output Voltage.
CH3: Input Voltage.
CH4: Output Current.
CH1: Output Voltage.
CH3: Input Voltage.
CH4: Output Current.
CH1: Output Voltage.
CH3: Input Voltage.
CH4: Output Current.
Fig. 10: TURN ON DELAY AT 115VAC 100%.
Fig. 12: TURN ON DELAY AT 230VAC 100%.
TF1500A24K01
TF1500A24K01
TF1500A24K01
TF1500A24K01
Turn-On Delay Time: 115VAC and 230VAC
Constant Current Mode
At start-up a load current oscillation at near zero output voltage can occur. This anomaly is observed with electronic load operated in
constant current mode rising across very low voltage. The load is trying to get adjusted output current as soon as any voltage on out-
put of the power supply is present, ideally 100% of required current. Unlike a typical load the electronic loads are powered from external
power source which affect the load characteristic during turn-on and so create oscillation as seen below. This phenomenon is not seen
in constant resistance mode or in actual system loads where some voltage is developed before current starts to flow.
