MIAR03 Datasheet, PDF (4/4 Pages) Minmax Technology Co., Ltd. – DC/DC CONVERTER 3W, DIP-24 Plastic Package Cost optimized Design

®
MIAR03 SERIES
DC/DC CONVERTER 3W, DIP-Package
Test Setup
Peak-to-Peak Output Noise Measurement Test
Use a Cout 0.33µF 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
Single Output
DC / DC
Converter
-Vin
-Out
Copper Strip
Cout
Copper Strip
Scope
Resistive
Load
+Vin
+Out
Dual Output
DC / DC Com.
Converter
-Vin
-Out
Copper Strip
Cout
Copper Strip
Cout
Copper Strip
Scope
Resistive
Load
Scope
Technical Notes
Maximum Capacitive Load
The MIAR03 series has limitation of maximum connected capacitance at the output. The power module may be operated in current limiting mode during start-up,
affecting the ramp-up and the startup time. 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.
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.
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 <
1.0Ω at 100 KHz) capacitor of a 4.7µF for the 5V input devices and a 2.2µF for the 12V and 24V devices.
+
+Vin
+Out
DC Power
Source
-
+
DC / DC
Converter
Cin
-Vin
-Out
Load
Output Ripple Reduction
A good quality low ESR capacitor placed as close as practicable across the load will give the best ripple and noise performance.
recommended to use 1.5µF capacitors at the output.
To reduce output ripple, it is
+
DC Power
Source
-
+Vin
+Out
Single Output
DC / DC
Converter
-Vin
-Out
Cout
Load
+
DC Power
Source
-
+Vin
+Out
Dual Output
DC / DC Com.
Converter
-Vin
-Out
Load
Cout
Load
Cout
Thermal Considerations
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 95℃. The derating curves are determined
from measurements obtained in a test setup.
Position of air velocity
probe and thermocouple
50mm / 2in
Air Flow
15mm / 0.6in
DUT
18, Sin Sin Road, An-Ping Industrial District, Tainan 702, Taiwan
Minmax Technology Co., Ltd.
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2013/01/30 P5 Page 4 of 4