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MEW1000 Series
2W, Wide Input Range SIP, Single & Dual Output DC/DC Converters
Key Features
Efficiency up to 80% 1500VDC Isolation MTBF > 1,000,000 Hours 4:1 Wide Input Range Low Cost Remote On/Off Control Low Ripple and Noise Temperature Performance -40] to +75] UL 94V-0 Package Material Internal SMD Construction
$
Low Noise Low Profile Low Cost
1500 VDC
I/O Isolation
Remote on/off
4:1
Wide Range
Minmax's MEW1000-Series power modules are low-profile dc-dc converters that operate over input voltage ranges of 9-36VDC and 18-75VDC which provide precisely regulated output voltages of 3.3V, 5V, 12V, 15V, {5V, {12V and {15VDC. The MEW1000 series is an excellent selection for data communication equipments, mobile battery driven equipments, distributed power systems, telecommunication equipments, mixed analog/digital subsystems, process/machine control equipments, computer peripheral systems and industrial robot systems. The modules have a maximum power rating of 2W and a typical full-load efficiency of 80%, continuous short circuit, 30mV output ripple, built-in filtering for both input and output minimize the need for external filtering.
Absolute Maximum Ratings
Input Surge Voltage ( 1000 mS ) Parameter 24VDC Input Models 48VDC Input Models Lead Temperature (1.5mm from case for 10 Sec.) Internal Power Dissipation Min. -0.7 -0.7 ----Max. 50 100 260 2,500 Unit VDC VDC ] mW
Environmental Specifications
Parameter Operating Temperature Operating Temperature Storage Temperature Humidity Cooling Conditions Ambient Case Min. -40 -40 -55 Max. +75 +90 +105 Unit ] ] ] %
Exceeding the absolute maximum ratings of the unit could cause damage. These are not continuous operating ratings.
--95 Free-Air Convection
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MEW1000 Series
Model Selection Guide
Model Number Input Voltage Output Voltage Output Current Input Current Reflected Ripple Current mA (Typ.) Efficiency
VDC MEW1021 MEW1022 MEW1023 MEW1024 MEW1025 MEW1026 MEW1027 MEW1031 MEW1032 MEW1033 MEW1034 MEW1035 MEW1036 MEW1037
24 ( 9 ~ 36 )
48 ( 18 ~ 75 )
VDC 3.3 5 12 15 {5 {12 {15 3.3 5 12 15 {5 {12 {15
Max. mA 500 400 167 134 {200 {83 {67 500 400 167 134 {200 {83 {67
Min. mA 125 100 42 33 {50 {21 {17 125 100 42 33 {50 {21 {17
@Max. Load mA (Typ.) 97 110 106 105 114 108 106 49 58 54 54 60 55 55
@No Load mA (Typ.)
20
300
15
600
@Max. Load % (Typ.) 71 76 79 80 73 77 79 70 72 78 78 70 76 76
Capacitive Load
Models by Vout Maximum Capacitive Load # For each output 3.3V 2200 5V 1000 12V 170 15V 110 {5V # 470 {12V # 100 {15V # 47 Unit uF
Input Fuse Selection Guide
24V Input Models 350mA Slow - Blow Type 48V Input Models 135mA Slow - Blow Type
Input Specifications
Parameter Start Voltage Under Voltage Shutdown Reverse Polarity Input Current Short Circuit Input Power Input Filter All Models Model 24V Input Models 48V Input Models 24V Input Models 48V Input Models Min. 4.5 8.5 --------Typ. 6 12 --------Max. 8.5 17 8 16 0.5 1500 A mW VDC Unit
Capacitor type
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MEW1000 Series
Output Specifications
Parameter Output Voltage Accuracy Output Voltage Balance Line Regulation Load Regulation Ripple & Noise (20MHz) Ripple & Noise (20MHz) Ripple & Noise (20MHz) Over Power Protection Transient Recovery Time Transient Response Deviation Temperature Coefficient Output Short Circuit 25% Load Step Change Over Line, Load & Temp. Dual Output, Balanced Loads Vin=Min. to Max. Io=25% to 100% Conditions Min. --------------120 ------Continuous Typ. {1.0 {1.0 {0.3 {0.5 30 ------100 {3 {0.01 Max. {2.0 {2.0 {0.5 {0.75 50 75 15 --300 {5 {0.02 Unit % % % % mV P-P mV P-P mV rms % uS % %/]
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 1000 ----1000 Typ. ------250 300 --Max. ------500 ----Unit VDC VDC M[ pF KHz K Hours
Remote On/Off Control
Parameter Supply On Supply Off Device Standby Input Current Control Input Current ( on ) Control Input Current ( off ) Control Common Vin = 0V Vin = 5.0V Conditions Min. 2.9 ------Typ. --1 ----Max. 15 3 -1 1 Unit VDC mA mA mA Under 0.6 VDC or Open Circuit, drops down to 0VDC by 2mV/]
Referenced to Negative Input
Notes:
1. Specifications typical at Ta=+25], resistive load, nominal input voltage, rated output current unless otherwise noted. 2. Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%. 3. Ripple & Noise measurement bandwidth is 0-20 MHz. 4. These power converters require a minimum output loading to maintain specified regulation. 5. Operation under no-load conditions will not damage these modules; however, they may not meet all specifications listed. 6. All DC/DC converters should be externally fused on the front end for protection. 7. Other input and output voltage may be available, please contact factory. 8. Specifications subject to change without notice.
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MINMAX
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MEW1000 Series
Block Diagram
Single Output Dual Output
+Vin
+Vo
+Vin
+Vo Com.
-Vo -Vin On/Off PFM Isolation Ref.Amp
-Vin On/Off PFM Isolation Ref.Amp
-Vo
Input Voltage Transient Rating
150 140 130 120 110 100 Vin ( VDC ) 90 80 70 60 50 40 30 20 10 0 10uS 100uS 1mS 10mS 100mS 24VDC Input Models 48VDC Input Models
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MEW1000 Series
100 90
Efficiency (%) 100 90 80 70 60 50 40
Efficiency (%)
80 70 60 50 40 Low Nom Input Voltage (V) High
Low
Nom Input Voltage (V)
High
Efficiency vs Input Voltage ( Single Output )
Efficiency vs Input Voltage ( Dual Output )
90 80 Efficiency (%) 70 Efficiency (%) 60 50 40 30 20 10 20 40 60 Load Current(%) 80 100
90 80 70 60 50 40 30 20 10 20 40 60 Load Current(%) 80 100
Efficiency vs Output Load ( Single Output )
Efficiency vs Output Load ( Dual Output )
100 80 Output Power (%) 100LFM Natural convection
400LFM 200LFM
60
40
20 0 -40
50 60 70 80 ] 90 100 110
Ambient Temperature
Derating Curve
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MEW1000 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 simulated source impedance. Capacitor Cin, offsets possible battery impedance. Current ripple is measured at the input terminals of the module, measurement bandwidth is 0-500KHz.
To Oscilloscope + Battery + Lin Current Probe
Maximum Capacitive Load
The MEW1000 series has limitation of maximum connected capacitance on the output. The power module may operate 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.
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.
+Vin
+Out Load
DC / DC Converter -Vin -Out
Cin
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 on the input to insure startup. By using a good quality low Equivalent Series Resistance (ESR < 1.0[ at 100 kHz) capacitor of a 1.5uF for the 24V and 48V devices, capacitor mounted close to the power module helps ensure stability of the unit.
+ DC Power Source + Cin -Vin -Out +Vin DC / DC Converter +Out Load
Peak-to-Peak Output Noise Measurement Test
Use a Cout 0.47uF 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 Scope Resistive Load
+Vin Dual Output DC / DC Converter -Vin
+Out Com.
Copper Strip Cout Cout Scope Resistive Load Scope
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 that 3.3uF capacitors are used on output.
+ DC Power Source -Vin +Vin Single Output DC / DC Converter -Out +Out
-Out
Design & Feature Considerations
Remote On/Off
Negative logic remote on/off turns the module off during a logic high voltage on the remote on/off pin, and on 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 high is 2.9V to 15V. A logic low is under 0.6 VDC or open circuit, drops down to 0VDC by 2mV/] The maximum sink current at on/off terminal during a logic low is 1 mA. The maximum allowable leakage current of the switch at on/off terminal =(under 0.6VDC or open circuit) is 1mA.
Cout
Load
+ DC Power Source -
+Vin
+Out Dual Output DC / DC Com. Converter Cout Load
-Vin
-Out
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MEW1000 Series
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 were determined from measurements obtained in an experimental apparatus.
Position of air velocity probe and thermocouple 15mm / 0.6in
50mm / 2in
Air Flow
DUT
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Mechanical Dimensions
Physical Characteristics
Case Size
12.45[0.49]
:
25.95*9.25*12.45 mm 1.02*0.36*0.49 inches Non-Conductive Black Plastic 6.5g UL94V-0
Case Material Weight
9.25[0.36]
: : :
2.03[0.08]
2.54
[0.100]
7.62[0.300]
2.54[0.100]X8=20.32[0.80]
3.2[0.13]
25.95[1.02]
Flammability
0.3[0.012] 0.5[0.02]
1
2.75[0.11]
2
3
6
7
8
9
Tolerance
Millimeters X.X{0.25 X.XX{0.13
Inches X.XX{0.01 X.XXX{0.005 {0.002
Pin
{0.05
Pin Connections
Pin 1 2 3 6 7 8 9 Single Output -Vin +Vin Remote On/Off +Vout NC NC -Vout NC: No Connection Dual Output -Vin +Vin Remote On/Off +Vout Common NC -Vout
REV:3 2008/10/02
MINMAX
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