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MSAU311 датащи(PDF) 4 Page - Minmax Technology Co., Ltd.

номер детали MSAU311
подробное описание детали  DC/DC CONVERTER 1W, SMD Package with Industry Standard Pinout
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производитель  MINMAX [Minmax Technology Co., Ltd.]
домашняя страница  http://www.minmax.com.tw
Logo MINMAX - Minmax Technology Co., Ltd.

MSAU311 датащи(HTML) 4 Page - Minmax Technology Co., Ltd.

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MSAU300 SERIES
DC/DC CONVERTER 1W, SMD-Package, High Isolation
18, Sin Sin Road, An-Ping Industrial District, Tainan 702, Taiwan
Tel: 886-6-2923150
Fax: 886-6-2923149
E-mail: sales@minmax.com.tw
2011/08/11 REV:6
Page 4 of 4
Minmax Technology Co., Ltd.
Test Configurations
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with a inductor Lin (4.7uH) and Cin (220uF, ESR < 1.0Ω at 100 KHz) to simulate source impedance. Capacitor Cin, offsets
possible battery impedance.
Current ripple is measured at the input terminals of the module, measurement bandwidth is 0-500 KHz.
+Out
-Out
+Vin
-Vin
DC / DC
Converter
Load
Battery
+
Lin
+
Cin
To Oscilloscope
Current
Probe
Peak-to-Peak Output Noise Measurement Test
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.
+Out
-Out
+Vin
-Vin
Single Output
DC / DC
Converter
Resistive
Load
Scope
Copper Strip
Cout
Copper Strip
Design & Feature Considerations
Maximum Capacitive Load
The MSAU300 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 2.2uF for the 5V input devices, a 1.0uF for the 12V input devices and a 0.47uF for the 24V devices..
+
+Out
-Out
+Vin
-Vin
DC / DC
Converter
Load
DC Power
Source
+
-
Cin
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 1.0uF capacitors at the output.
+Out
-Out
+Vin
-Vin
Load
DC Power
Source
+
-
Cout
Single Output
DC / DC
Converter
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.
DUT
Position of air velocity
probe and thermocouple
50mm / 2in
Air Flow
15mm / 0.6in


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