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TOTAL POWER INT'L
2 Watts 2 :1 Wide Input Range DC/DC Converters
Single Outputs
Key Features
MCW1000 Series
High Efficiency up to 80% 2:1 Input Range I/O Isolation 1000VDC Industry Standard Pinout SMT Technology Short Circuit Protection MTBF > 1,000,000 Hours External ON/OFF-Control Low Ripple and Noise
MCW1000-Series power modules are low-profile dc-dc converters that operate over input voltage ranges of 4.5-9VDC, 9-18VDC, 18-36VDC and 36-75VDC and provide precisely regulated output voltages of 3.3V, 5V, 12V. The -40] to +65] operating temperature range makes it ideal 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, 60mV output ripple, built-in filtering for both input and output minimizes the need for external filtering.
Low Noise
I/O Isolation
Remote on/off
$
Low Cost Low Profile
2:1
Wide Range
Block Diagram
+Vin
+Vo
-Vo
-Vin On/Off PFM Isolation Ref.Amp
MCW1000 Series
Model Selection Guide
Model Number Input Voltage VDC MCW1011 MCW1012 MCW1013 MCW1021 MCW1022 MCW1023 MCW1031 MCW1032 MCW1033 MCW1041 MCW1042 MCW1043 5 ( 4.5 ~ 9 ) 12 ( 9 ~ 18 ) 24 ( 18 ~ 36 ) 48 ( 36 ~ 75 ) Output Voltage VDC 3.3 5 12 3.3 5 12 3.3 5 12 3.3 5 12 Output Current Max. mA 500 400 167 500 400 167 500 400 167 500 400 167 Min. mA 125 100 42 125 100 42 125 100 42 125 100 42 Input Current @Max. Load mA (Typ.) 471 548 534 184 217 209 96 109 103 49 57 53 @No Load mA (Typ.) 40 Efficiency @Max. Load % (Typ.) 70 73 75 73 77 80 72 77 81 71 73 79
20
10
8
Absolute Maximum Ratings
Parameter 5VDC Input Models 12VDC Input Models Input Surge Voltage ( 1000 mS ) 24VDC Input Models 48VDC Input Models Lead Temperature (1.5mm from case for 10 Sec.) Internal Power Dissipation Min. -0.7 -0.7 -0.7 -0.7 ----Max. 15 25 50 100 260 1,800 Unit VDC VDC VDC VDC ] mW
Note :
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 50% 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 devices; however they may not meet all listed specifications. Min. Max. -40 +65 -40 +90 -55 +105 --95 Free-Air Convection Unit ] ] ] % 6. All DC/DC converters should be externally fused at the front end for protection. 7. Other input and output voltage may be available, please contact factory. 8. Specifications subject to change without notice.
Exceeding these values can damage the module. These are not continuous operating ratings.
Environmental Specifications
Parameter Operating Temperature Operating Temperature Storage Temperature Humidity Cooling Conditions Ambient Case
MCW1000 Series
Input Specifications
Parameter Start Voltage Model 5V Input Models 12V Input Models 24V Input Models 48V Input Models Under Voltage Shortdown 5V Input Models 12V Input Models 24V Input Models 48V Input Models Reverse Polarity Input Current Short Circuit Input Power Input Filter All Models Min. 3.5 4.5 8 16 ------------Typ. 4 7 12 24 3.5 6.5 11 22 ----Max. 4.5 9 18 36 4 8.5 17 34 1 1500 A mW VDC Unit
Capacitor type
Output Specifications
Parameter Output Voltage Accuracy 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 Vin=Min. to Max. Io=25% to 100% Conditions Min. ------------120 ------Continuous Typ. {1 {0.3 {0.5 30 ------100 {3 {0.01 Max. {2 {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 Isolation Test Voltage 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. 1000 1100 1000 --100 1000 Typ. ------65 300 --Max. ------120 650 --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 Conditions Min. Typ. Max. 15 0.2 -0.4 1 Unit VDC mA mA mA under 1VDC or open circuit 2.7 --------0.1 -----
Referenced to Negative Input
MCW1000 Series
Capacitive Load
Models by Vout Maximum Capacitive Load Note: # For each output . 3.3V 2200 5V 1000 12V 170 170 Unit uF
Input Fuse Selection Guide
5V Input Models 1500mA Slow - Blow Type 12V Input Models 700mA Slow - Blow Type 24V Input Models 350mA Slow - Blow Type 48V Input Models 135mA Slow - Blow Type
Input Voltage Transient Rating
MCW1000 Series
90 80 70 Efficiency(%) 60 50 40 30 20 Low Nom Input Voltage (V) High
90 80 Efficiency(%) 70 60 50 40 30 20 10 20 40 60 80 100 Load Current (%)
Efficiency vs Input Voltage ( Single Output )
Efficiency vs Output Load ( Single Output )
100 80 Output Power (%) 100LFM Natural convection 400LFM
60
200LFM
40
20 0 -40
50 60 70 80 ] 90 100 110
Ambient Temperature
Derating Curve
MCW1000 Series
Test Configurations
Input Reflected-Ripple Current Test Setup
To Oscilloscope + Battery + Lin Current Probe +Vin +Out Load
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 8.2uF for the 5V input devices, a 3.3uF for the 12V input devices and a 1.5uF for the 24V and 48V devices.
+ DC Power Source + Cin -Vin -Out +Vin DC / DC Converter +Out Load
DC / DC Converter -Vin -Out
Cin
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.
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
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 3.3uF capacitors at the output.
+ DC Power Source -
+Vin Single Output DC / DC Converter -Vin
+Out
Design & Feature Considerations
Maximum Capacitive Load
The MCW1000 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.
Cout -Out
Load
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.
MCW1000 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 90C. 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
MCW1000 Series
Mechanical Data Connecting Pin Patterns
Single Output
0.86 (21.8)
Top View ( 2.54 mm / 0.1 inch grids )
0.44 (11.2) 0.02 (0.5)
0.13 (3.2) 0.08 (2.0) 0.02 (0.5) 0.10 (2.54)
0.20 (5.08)
Bottom
1 2 3 5 6 7 8
0.01 (0.25)
0.36 (9.2)
0.12 (3.0)
Tolerance
Millimeters .X{0.25 .XX{0.25
Inches .XX{0.01 .XXX{0.01 {0.002
Pin
{0.05
Pin Connections
Pin 1 2 3 5 6 7 8 Single Output -Vin(GND) +Vin(VCC) Remote ON/OFF No function +Vout -Vout No function
Physical Characteristics
21.8*9.3*11.1mm 0.86*0.37*0.44inches Non-Conductive Black Plastic 4.8g UL94V-0
Case Size
: : : :
Case Material Weight Flammability
NC: No Connection
Units are encapsulated in a low thermal resistance molding compound which has excellent chemical resistance and electrical properties in high humidity environment and over a wide operating temperature range. The encapsulant and outer shell of the unit have UL94V-0 ratings. The leads are tin plated for better soldering.

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