MBU121 データシートの表示（PDF） - Total Power International
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MBU121 Datasheet PDF : 4 Pages
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Total Power International, Inc.
MBU100 SERIES
DC/DC CONVERTER 1W, SIP-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
Technical Notes
Maximum Capacitive Load
The MBU100 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. For optimum performance we recommend 33µF maximum capacitive load for devices. 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 comended to use a good quality low Equivalent Series Resistance (ESR < 1.0Ω at
100 KHz) capacitor of a 2.2µF for the 3.3V, 5V input devices, a 1.0µF for the 12V input devices and a 0.47µF for the 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. To reduce output ripple, it is
recommended to use 1µF capacitors at the output.
+
DC Power
Source
-
+Vin
+Out
Single Output
DC / DC
Converter
-Vin
-Out
Cout
Load
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 90℃. The derating curves are determined from
measurements obtained in a test setup.
Position of air velocity
probe and thermocouple
15mm / 0.6in
50mm / 2in
Air Flow
DUT
Total Power International, Inc
Toll Free: 877-646-0900
www.total-power.com
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