MSLU400 Series
2W, Miniature SMD, Single & Dual Output DC/DC Converters
Key Features
Efficiency up to 80%
1500VDC Isolation
MTBF > 2,000,000 Hours
Low Cost
Input 5, 12 and 24VDC
Output 3.3, 5, 12, {5, {12 and {15VDC
Temperature Performance -25] to +75]
Lead Frame Technology
UL 94V-0 Package Material
Internal SMD Construction
1500
VDC
SMD
$
Low Cost
Low Profile
I/O Isolation
Minmax's MSLU400 2W DC/DC's are in "gull-wing" SMT package, weigh a mere 2.2 grams. The series consists of 18 models with input
voltages of 5V,12V and 24VDC which offers standard output voltages of 3.3V, 5V, 12V, {5V, {12V and {15VDC for the choice.
Their impressive guaranteed efficiencies enable all models to deliver their fully rated output power from -25] to +75] without heat
sinking or forced-air cooling.
The MSLU400 series are excellent selections for a variety of applications including data communication equipments, distributed power
systems, telecommunication equipments and industrial robot systems.
The MSLU400 units are available in tape and reel package.
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.
9
18
30
300
650
Unit
VDC
VDC
VDC
]
mW
Environmental Specifications
Parameter
Operating Temperature
Operating Temperature
Storage Temperature
Humidity
Cooling
Conditions
Ambient
Case
Min.
-25
-25
-25
---
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.
Leadfree Reflow Solder Process as per IPC/JEDEC J-STD-020C peak
temp. 245C/10 sec.
1
MINMAX
REV:4 2009/01/20
MSLU400 Series
Output Specifications
Parameter
Output Voltage Balance
Line Regulation
Load Regulation
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Temperature Coefficient
Output Short Circuit
Over Line, Load & Temp.
Conditions
Dual Output, Balanced Loads
For Vin Change of 1%
Io=20% to 100%
Min.
---
---
---
---
---
---
0.5 Second Max.
Typ.
{0.1
{1.2
100
---
---
{0.01
Max.
{1.0
{1.5
120
200
15
{0.02
Unit
%
%
%
mV P-P
mV P-P
mV rms
%/]
See Model Selection Guide
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.
1500
1650
10
---
50
2000
Typ.
---
---
---
60
100
---
Max.
---
---
---
100
120
---
Unit
VDC
VDC
G[
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 on the front end for protection.
6. Other input and output voltage may be available, please contact factory.
7. Specifications subject to change without notice.
8. It is not recommended to use water-washing process on SMT units.
Block Diagram
Single Output
Dual Output
+Vo
+Vin
Bipolar
Push-Pull
Inverter
-Vin
-Vo
-Vin
+Vin
Bipolar
Push-Pull
Inverter
+Vo
Com.
-Vo
3
MINMAX
REV:4 2009/01/20
MSLU400 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.
To Oscilloscope
+
Battery
+
Lin
Current
Probe
+Vin
+Out
Load
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 < 1.0[ 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.
Output Ripple Reduction
+
DC Power
Source
-
+
Cin
-Vin
-Out
+Vin
DC / DC
Converter
+Out
Load
DC / DC
Converter
-Vin
-Out
Cin
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.
+Vin
Single Output
DC / DC
Converter
-Vin
-Out
+Out
Copper Strip
Cout
Copper Strip
Scope
Resistive
Load
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 1.5uF
capacitors at the output.
+
DC Power
Source
-
+Vin
Single Output
DC / DC
Converter
-Vin
+Out
Cout
-Out
Load
+
DC Power
Source
+Vin
+Out
Dual Output
Com.
DC / DC
Converter
Cout
Load
+Vin
Dual Output
DC / DC
Converter
-Vin
+Out
Com.
-Out
Copper Strip
Cout
Copper Strip
Cout
Copper Strip
Scope
Scope
Resistive
Load
-
-Vin
-Out
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° C.
The derating curves are determined from measurements
obtained in an experimental apparatus.
Design & Feature Considerations
Maximum Capacitive Load
The MSLU400 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.
Position of air velocity
probe and thermocouple
15mm / 0.6in
50mm / 2in
Air Flow
DUT
5
MINMAX
REV:4 2009/01/20
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