MDWI03 Datasheet, PDF (4/4 Pages) Minmax Technology Co., Ltd. – DC/DC CONVERTER 3W, DIP-Package Ultra compact DIP-Package

Total Power International, Inc.
MDWI03 SERIES
DC/DC CONVERTER 3W, DIP Package
Test Setup
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with a inductor Lin (4.7μH) and Cin (220μF, ESR < 1.0Ω at 100 KHz) to simulate source impedance.
possible battery impedance. Current ripple is measured at the input terminals of the module, measurement bandwidth is 0-500 KHz.
Capacitor Cin, offsets
To Oscilloscope
+Vin +Out
+
+ Lin
Battery Cin
Current
Probe
DC / DC
Converter
-Vin -Out
Load
Peak-to-Peak Output Noise Measurement Test
Use a Cout 0.47μF 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
Remote On/Off
Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin, and off during a logic low. To turn the power module on and off,
the user must supply a switch to control the voltage between the on/off terminal and the -Vin terminal. The switch can be an open collector or equivalent.
A logic low is -0.7V to 0.8V. A logic high is 2.5V to 5.5V. The maximum sink current of the switch at on/off terminal during a logic low is -300 μA.
The maximum sink current of the switch at on/off terminal during a logic high is -200μA or open.
Overcurrent Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure current limiting for an unlimited
duration. At the point of current-limit inception, the unit shifts from voltage control to current control. The unit operates normally once the output current is brought back
into its specified range.
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 24V input devices and a 2.2μF for the 48V devices.
+
DC Power
Source
-
+Vin
+
DC / DC
Converter
Cin
-Vin
+Out
-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 3.3μF 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
Maximum Capacitive Load
The MDWI03 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.
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 105℃. 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
Total Power International, Inc
Toll Free: 877-646-0900
www.total-power.com