MSLU300 Series
Test Configurations
Output Ripple Reduction
Peak-to-Peak Output Noise Measurement Test
A good quality low ESR capacitor placed as close as
practicable across the load will give the best ripple and noise
performance.
To reduce output ripple, it is recommended to use 1.0uF
capacitors at the output.
Use a Cout 0.33uF ceramic capacitor.
Scope measurement should be made by using a BNC
socket, measurement bandwidth is 0-20 MHz. Position the
load between 50 mm and 75 mm from the DC/DC Converter.
+Vin
+Out
Copper Strip
+Vin
To Oscilloscope
+
+Vin
-Vin
+Vin
-Vin
+Out
-Out
+Out
Scope
Single Output
Resistive
Load
DC / DC
Cout
Single Output
DC / DC
DC Power
Source
+
+
Lin
-Out
Converter
DC / DC
Current
Load
Converter
Converter
Probe
Cout
Load
-Vin
Battery
Copper Strip
Cin
-
-Vin
-Out
Copper Strip
Cout
+Vin
+Out
Com.
-Out
Scope
+
+Out
Com.
-Out
Dual Output
DC / DC
Resistive
Load
Copper Strip
Cout
Dual Output
DC / DC
Converter
Cout
Load
DC Power
Source
Scope
Converter
-Vin
Copper Strip
-
Design & Feature Considerations
Maximum Capacitive Load
The MSLU300 series has limitation of maximum connected
capacitance at the output.
Thermal Considerations
The power module may be operated in current limiting
mode during start-up, affecting the ramp-up and the startup
time.
Many conditions affect the thermal performance of the
power module, such as orientation, airflow over the module
and board spacing. To avoid exceeding the maximum
temperature rating of the components inside the power
module, the case temperature must be kept below 90°C.
The derating curves are determined from measurements
obtained in an experimental apparatus.
The maximum capacitance can be found in the data sheet.
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the power module.
Position of air velocity
Air Flow
50mm / 2in
In applications where power is supplied over long lines and
output loading is high, it may be necessary to use a capacitor
at the input to ensure startup.
probe and thermocouple
15mm / 0.6in
DUT
Capacitor mounted close to the power module helps
ensure stability of the unit, it is recommended to use a good
quality low Equivalent Series Resistance (ESR < 1.0[ at 100
KHz) capacitor of a 2.2uF for the 5V input devices, a 1.0uF for
the 12V input devices and a 0.47uF for the 24V devices.
+
+Vin
DC / DC
+Out
+
DC Power
Source
Load
Converter
Cin
-
-Vin
-Out
REV:5 2009/01/20
MINMAX
5
MINMAX [ MINMAX TECHNOLOGY CO., LTD. ]
