MFU100 Series
1W, Ultra-Miniature, High Isolation, Single Output DC/DC Converters
Key Features
Efficiency up to 79%
3000VDC Isolation
MTBF > 2,000,000 Hours
Low Cost
Input 5, 12 and 24VDC
Output 5, 9, 12 and 15VDC
Temperature Performance -40] to +75]
UL 94V-0 Package Material
Internal SMD Construction
Industry Standard Pinout
$
Low Profile
Low Cost
3000
VDC
I/O Isolation
Taking up as little as 0.16 square inches of board space, Minmax's MFU100 1W DC/DC's are specially designed to provide power distribution
applications where space is critical in an ultra-miniature DIP package.
The series consists of 12 models with input voltages of 5V, 12V and 24VDC which offers standard single output voltages of 5V, 9V, 12V, 15VDC.
The MFU100 series is an excellent selection for a variety of applications including distributed power systems, mixed analog/digital subsystems,
portable test equipments, local power networks and battery backed systems.
Absolute Maximum Ratings
Parameter
Input Surge Voltage
( 1000 mS )
5VDC Input Models
12VDC Input Models
24VDC Input Models
Min.
-0.7
-0.7
-0.7
---
---
Max.
7
15
28
260
450
Unit
VDC
VDC
VDC
]
mW
Environmental Specifications
Parameter
Operating Temperature
Operating Temperature
Storage Temperature
Humidity
Cooling
Conditions
Ambient
Case
Min.
-40
-25
-40
---
Max.
+75
+90
+125
95
Unit
]
]
]
%
Lead Temperature (1.5mm from case for 10 Sec.)
Internal Power Dissipation
Free-Air Convection
Exceeding the absolute maximum ratings of the unit could cause damage.
These are not continuous operating ratings.
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MINMAX
REV:4 2008/10
MFU100 Series
General Specifications
Parameter
Isolation Voltage Rated
Isolation Voltage Test
Isolation Resistance
Isolation Capacitance
Switching Frequency
MTBF
MIL-HDBK-217F @ 25], Ground Benign
Conditions
60 Seconds
Flash Tested for 1 Second
500VDC
100KHz,1V
Min.
3000
3300
1000
---
50
2000
Typ.
---
---
---
60
90
---
Max.
---
---
---
100
110
---
Unit
VDC
VDC
M[
pF
KHz
K Hours
Notes:
1. Specifications typical at Ta=+25], resistive load, nominal input voltage, rated output current unless otherwise noted.
2. Ripple & Noise measurement bandwidth is 0-20 MHz.
3. These power converters require a minimum output loading to maintain specified regulation.
4. Operation under no-load conditions will not damage these modules; however, they may not meet all specifications listed.
5. All DC/DC converters should be externally fused at the front end for protection.
6. Other input and output voltage may be available, please contact factory.
7. Specifications subject to change without notice.
Block Diagram
+Vo
+Vin
Bipolar
Push-Pull
Inverter
-Vin
-Vo
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MINMAX
REV:4 2008/10
MFU100 Series
Test Configurations
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with a inductor
Lin (4.7uH) and Cin (220uF, ESR < 1.0[ 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.
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 < 1.0[ at 100
KHz) capacitor of a 1.5uF for the 5V input devices, a 1.0uF for
the 12V input devices and a 0.47uF for the 24V devices.
To Oscilloscope
+
Battery
+
Lin
Current
Probe
+Vin
+Out
Load
DC / DC
Converter
-Vin
-Out
Cin
+
DC Power
Source
-
+
Cin
+Vin
DC / DC
Converter
-Vin
+Out
Load
-Out
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.
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 1uF
capacitors at the output.
+Vin
Single Output
DC / DC
Converter
-Vin
+Out
Copper Strip
Cout
Scope
Resistive
Load
+
DC Power
Source
-
-Vin
+Vin
Single Output
DC / DC
Converter
-Out
+Out
-Out
Cout
Load
Thermal Considerations
Design & Feature Considerations
Maximum Capacitive Load
The MFU100 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 33uF maximum
capacitive load for devices.
The maximum capacitance can be found in the data sheet.
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.
Position of air velocity
probe and thermocouple
15mm / 0.6in
50mm / 2in
Air Flow
DUT
5
MINMAX
REV:4 2008/10
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