Datasheet

S24SE/S24DE series
15W Single/Dual Output DC/DC Converter
DS_S24SE/S24DE 15W _06032014 E-mail:[e-mail]
http://www.deltaww.com/dcdc
P8
DESIGN CONSIDERATIONS
Layout and EMI considerations
Delta’s DC/DC power modules are designed to operate
in a wide variety of systems and applications. For design
assistance with EMC compliance and related PWB
layout issues, please contact Delta’s technical support
team. An external input filter module is available for
easier EMC compliance design. Below is the reference
design for an input filter to pass EN55022 (VDE0878)
class A(both q. peak and average).
L1=1uH
C1=47uF/50V, electrolytic capacitor
1 MHz
10 MHz
150 kHz
30 MHz
10.0
20.0
30.0
40.0
50.0
60.0
70.0
0.0
80.0
dBμV
Limits
55022MAV
55022MQP
Transducer
8130
Traces
PK+
AV
Test Result:
At T = +25C , Typical input voltage and full load.
Green is quasi peak mode; Blue is average mode.
Recommended PCB Layout
It is suggested to use multiple layers PCB and large size
copper on system board which connect to pins of module,
that can achieve better thermal performance.
FEATURES DESCRIPTIONS
Over-Current Protection
The modules include an internal output over-current
protection circuit, which will endure current limiting
for an unlimited duration during output overload. If
the output current exceeds the OCP set point, the
modules will shut down (hiccup mode).
The modules will try to restart after shutdown. If the
overload condition still exists, the module will shut
down again. This restart trial will continue until the
overload condition is corrected.
Over-Voltage Protection
The modules include an internal output over-voltage
protection circuit, which monitors the voltage on the
output terminals. If this voltage exceeds the
over-voltage set point, the modules will shut down,
and then restart after a hiccup-time (hiccup mode).
If latch mode is needed, please contact with Delta.
Over-Temperature Protection
The over-temperature protection consists of circuitry
that provides protection from thermal damage. If the
temperature exceeds the over-temperature
threshold the module will shut down.The module will
restart after the temperature is within specification.
Remote On/Off
The remote on/off feature on the module can be
either negative or positive logic. Negative logic turns
the module on during a logic low and off during a
logic high. Positive logic turns the modules on during
a logic high and off during a logic low.
Remote on/off can be controlled by an external
switch between the on/off terminal and the Vi (-)
terminal. The switch can be an open collector or
open drain. For negative logic if the remote on/off
feature is not used, please short the on/off pin to Vi
(-). For positive logic if the remote on/off feature is
not used, please leave the on/off pin to floating.