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MEW1023中文资料

Internal SMD Construction

y UL 94V-0 Package Material y Temperature Performance -40] to +75]y Low Ripple and Noise

y Remote On/Off Control y Low Cost

y 4:1 Wide Input Range y MTBF > 1,000,000 Hours y 1500VDC Isolation

y Efficiency up to 80%

Key Features

2W, Wide Input Range SIP, Single & Dual Output DC/DC Converters

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.

Free-Air Convection

Cooling

Exceeding the absolute maximum ratings of the unit could cause damage.These are not continuous operating ratings.

---Humidity mW

2,500

---Internal Power Dissipation

]+105

-55

Storage Temperature ]260---Lead Temperature (1.5mm from case for 10 Sec.)]+90-40Case

Operating Temperature VDC 100-0.748VDC Input Models ]+75-40Ambient Operating Temperature VDC 50-0.724VDC Input Models Input Surge Voltage

( 1000 mS )Unit Max.Min.Conditions Parameter

Unit Max.Min.Parameter

Environmental Specifications

Absolute Maximum Ratings

REV:3 2008/10/02

MINMAX

{17{67{15

MEW1037

7655{21{83{12MEW10367060{50{200{5MEW103578543313415MEW103478544216712MEW103372581004005MEW103270600

15491255003.348( 18 ~ 75 )

MEW103179106{17{67{15MEW102777108{21{83{12MEW102673114{50{200{5MEW1025801053313415MEW1024791064216712MEW1023761101004005MEW102271300

20971255003.324( 9 ~ 36 )

MEW1021% (Typ.)mA (Typ.)

mA (Typ.)

mA mA VDC VDC

@Max. Load @No Load @Max. Load Min.Max.Efficiency

Reflected Ripple Current Input Current

Output Current

Output Voltage

Input Voltage

Model Number

Model Selection Guide

# For each output

100

470

110

170

1000

2200

Maximum Capacitive Load Unit {15V #{12V #{5V #15V 12V 5V 3.3V Models by Vout

Capacitive Load

135mA Slow - Blow Type

350mA Slow - Blow Type

48V Input Models 24V Input Models Input Fuse Selection Guide

Capacitor type

Input Filter

mW 1500

------Short Circuit Input Power A 0.5------All Models Reverse Polarity Input Current 16------48V Input Models

8------24V Input Models Under Voltage Shutdown 17128.548V Input Models VDC 8.564.524V Input Models Start Voltage

Unit

Max.Typ.Min.Model Parameter

Input Specifications

MINMAX REV:3 2008/10/02

K Hours

------1000

MIL-HDBK-217F @ 25], Ground Benign

MTBF

KHz ---300---Switching Frequency pF 500250---100KHz,1V

Isolation Capacitance M[------1000500VDC Isolation Resistance VDC ------1650Flash Tested for 1 Second

Isolation Voltage Test VDC ------150060 Seconds

Isolation Voltage Rated Unit Max.Typ.Min.Conditions Parameter

General Specifications

Continuous

Output Short Circuit

%/]

{0.02

{0.01

---Temperature Coefficient %{5{3---Transient Response Deviation uS 300100---25% Load Step Change Transient Recovery Time %------120Over Power Protection mV rms 15------Ripple & Noise (20MHz)mV P-P 75------Over Line, Load & Temp.Ripple & Noise (20MHz)mV P-P 5030---Ripple & Noise (20MHz)%{0.75{0.5---Io=25% to 100%Load Regulation %{0.5{0.3---Vin=Min. to Max.Line Regulation %{2.0{1.0---Dual Output, Balanced Loads

Output Voltage Balance %{2.0{1.0---Output Voltage Accuracy Unit Max.Typ.Min.Conditions

Parameter

Output Specifications

Referenced to Negative Input

Control Common

------Vin = 5.0V Control Input Current ( off )mA -1------Vin = 0V Control Input Current ( on )mA 31---Device Standby Input Current VDC 15---2.9Supply Off

Under 0.6 VDC or Open Circuit, drops down to 0VDC by 2mV/]

Supply On Unit Max.Typ.Min.Conditions

Parameter

Remote On/Off Control

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.

REV:3 2008/10/02

MINMAX

Block Diagram

Input Voltage Transient Rating

Dual Output

Single Output

MINMAX REV:3 2008/10/02

Derating Curve

Efficiency vs Output Load ( Dual Output )

Efficiency vs Output Load ( Single Output )20

30405060708090E f f i c i e n c y (%)

Load Current(%)

100

3040506070

8090E f f i c i e n c y (%)

Load Current(%)

100

Efficiency vs Input Voltage ( Dual Output )

Efficiency vs Input Voltage ( Single Output )40

5060708090100E f f i c i e n c y (%)

Nom Low High

Input Voltage (V)

5060708090

100E f f i c i e n c y (%)

Nom Low

High

Input Voltage (V)

REV:3 2008/10/02

MINMAX

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.

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.

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.

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.

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.

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.

MINMAX REV:3 2008/10/02

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.

REV:3 2008/10/02

MINMAX

UL94V-0

Flammability

6.5g :Weight

Non-Conductive Black Plastic :Case Material 1.02*0.36*0.49 inches 25.95*9.25*12.45 mm :

Case Size

Physical Characteristics

Mechanical Dimensions

NC: No Connection

-Vout

-Vout 9

NC NC 8Common NC 7+Vout +Vout 6Remote On/Off

Remote On/Off

3+Vin +Vin 2-Vin -Vin 1Dual Output

Single Output

Pin Pin Connections

{0.002

{0.05

Pin X.XXX{0.005X.XX{0.13

X.XX{0.01X.X{0.25Inches Millimeters Tolerance 8

MINMAX REV:3 2008/10/02