MDS-400APB24AA Datasheet, PDF (10/12 Pages) Delta Electronics, Inc. – Medical AC-DC Open Frame Power Supply

Medical AC-DC Open Frame Power Supply
24V/400W 3”x5” High Density MDS-400APB24 AA
Dynamic Response
The power supply output voltage will remain within ±5% of its
steady state value, when subjected to a dynamic load 50 to 100%
of its rated current.
■ 50 to 100% Load
Short Circuit Protection
The power supply’s output OLP/OCP function also provides
protection against short circuits. When a short circuit is applied,
the output current will operate in “Hiccup mode”, as shown in the
illustration in the OLP/OCP section on this page. The power
supply will return to normal operation after the short circuit is
removed.
Inrush Current
Inrush current is the peak, instantaneous, input current measured
and, occurs when the input voltage is first applied. For AC input
voltages, the maximum peak value of inrush current will occur
during the first half cycle of the applied AC voltage. This peak
value decreases exponentially during subsequent cycles of AC
voltage.
Overload & Overcurrent Protections
The power supply’s Overload (OLP) and Overcurrent (OCP)
Protections will be activated before output current under 160% of
IO (Max load). Upon such occurrence, VO will start to drop. Once
the power supply has reached its maximum power limit, the
protection will be activated and the power supply will go into
“Hiccup mode” (Auto-Recovery). The power supply will recover
once the fault condition causing the OLP and OCP is removed
and IO is back within the specified limit.
Additionally, if the Iout is <160% but >100% for a prolong period
of time (depending on the load), the Over Temperature
Protection (OTP) will be activated due to high temperature on
critical components. The power supply will then go into
latchmode.
Overvoltage Protection
The power supply’s overvoltage circuit will be activated when its
internal feedback circuit fails. The output voltage shall not exceed
its specifications defined on Page 4 under “Protections”. Power
supply will latch off, and require removal/re-application of input
AC voltage in order to restart.
Over Temperature Protection
As mentioned above, the power supply also has Over
Temperature Protection (OTP). This is activated when the
overload condition persists for an extended duration and the
output current is below the overload trigger point but >100% load.
In the event of a higher operating temperature condition at 100%
load, the power supply will run into OTP when the surrounding air
temperature is higher than the operating temperature. When
activated, the output voltage will go into latch mode until the input
voltage is removed; then, reapplied, and the surrounding air
temperature drops to its normal operating temperature.
10
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (November 2016, Rev. 08)