TOTAL POWER INT'L
MCW1000 Series
2 Watts 2 :1 Wide Input Range DC/DC Converters
Single Outputs
Key Features
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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
y
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
$
Low Cost
2:1
Low Profile
Wide Range
Block Diagram
+Vo
+Vin
-Vo
-Vin
On/Off
PFM
Isolation
Remote on/off
Ref.Amp
MCW1000 Series
Model Selection Guide
Model
Number
MCW1011
MCW1012
MCW1013
MCW1021
MCW1022
MCW1023
MCW1031
MCW1032
MCW1033
MCW1041
MCW1042
MCW1043
Input
Voltage
Output
Voltage
VDC
VDC
Max.
mA
Min.
mA
@Max. Load
mA (Typ.)
3.3
5
12
3.3
5
12
3.3
5
12
3.3
5
12
500
400
167
500
400
167
500
400
167
500
400
167
125
100
42
125
100
42
125
100
42
125
100
42
471
548
534
184
217
209
96
109
103
49
57
53
5
( 4.5 ~ 9 )
12
( 9 ~ 18 )
24
( 18 ~ 36 )
48
( 36 ~ 75 )
Output Current
Absolute Maximum Ratings
Efficiency
@No Load
mA (Typ.)
40
20
10
8
@Max. Load
% (Typ.)
70
73
75
73
77
80
72
77
81
71
73
79
Note :
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
Exceeding these values can damage the module. These are not continuous
operating ratings.
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.
Environmental Specifications
Parameter
Operating Temperature
Operating Temperature
Storage Temperature
Humidity
Cooling
Input Current
Conditions
Ambient
Case
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.
MCW1000 Series
Input Specifications
Parameter
Start Voltage
Under Voltage Shortdown
Model
Min.
Typ.
Max.
4.5
5V Input Models
3.5
4
12V Input Models
4.5
7
9
24V Input Models
8
12
18
48V Input Models
16
24
36
5V Input Models
---
3.5
4
12V Input Models
---
6.5
8.5
24V Input Models
---
11
17
48V Input Models
---
22
34
---
---
1
A
---
---
1500
mW
Reverse Polarity Input Current
Short Circuit Input Power
Unit
All Models
Input Filter
VDC
Capacitor type
Output Specifications
Parameter
Conditions
Output Voltage Accuracy
Min.
Typ.
Max.
---
{1
{2
Unit
%
%
Line Regulation
Vin=Min. to Max.
---
{0.3
{0.5
Load Regulation
Io=25% to 100%
---
{0.5
{0.75
%
---
30
50
mV P-P
Ripple & Noise (20MHz)
---
---
75
mV P-P
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
---
---
15
mV rms.
Over Power Protection
120
---
---
%
Transient Recovery Time
---
100
300
uS
---
{3
{5
%
---
{0.01
{0.02
%/]
Transient Response Deviation
Over Line,Load & Temp
25% Load Step Change
Temperature Coefficient
Output Short Circuit
Continuous
General Specifications
Parameter
Isolation Voltage
Isolation Test Voltage
Conditions
Min.
Typ.
Max.
Unit
60 Seconds
1000
---
---
VDC
Flash Tested for 1 Second
1100
---
---
VDC
Isolation Resistance
500VDC
1000
---
---
M[
Isolation Capacitance
100KHz,1V
---
65
120
pF
100
300
650
KHz
1000
---
---
K Hours
Switching Frequency
MTBF
MIL-HDBK-217F @ 25], Ground Benign
Remote On/Off Control
Parameter
Supply On
Conditions
Min.
Typ.
under 1VDC or open circuit
2.7
---
Max.
Unit
15
VDC
Device Standby Input Current
---
0.1
0.2
mA
Control Input Current ( on )
---
---
-0.4
mA
Control Input Current ( off )
---
---
1
mA
Supply Off
Control Common
Referenced to Negative Input
MCW1000 Series
Capacitive Load
Models by Vout
Maximum Capacitive Load
3.3V
2200
5V
1000
Note: # For each output .
12V
170
170
Unit
uF
Input Fuse Selection Guide
5V Input Models
1500mA Slow - Blow Type
12V Input Models
700mA Slow - Blow Type
Input Voltage Transient Rating
24V Input Models
350mA Slow - Blow Type
48V Input Models
135mA Slow - Blow Type
MCW1000 Series
90
90
80
80
Efficiency(%)
Efficiency(%)
70
60
50
40
Low
Nom
High
Input Voltage (V)
50
40
60
100LFM
400LFM
Natural
convection
200LFM
40
20
0
〜
-40
50
60
70
90
80
Ambient Temperature
Derating Curve
10
20
40
60
80
Efficiency vs Output Load ( Single Output )
100
80
20
Load Current (%)
Efficiency vs Input Voltage ( Single Output )
Output Power (%)
60
30
30
20
70
]
100
110
100
MCW1000 Series
Test Configurations
Input Source Impedance
Input Reflected-Ripple Current Test Setup
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.
To Oscilloscope
+
+
Battery
+Vin
Lin
DC / DC
Converter
Current
Probe
Cin
+Out
-Vin
Load
-Out
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
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
+Vin
+
DC / DC
Converter
+Vin
+Out
Single Output
DC / DC
Converter
-Vin
Copper Strip
Cout
Scope
Resistive
Load
Load
Cin
-
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.
+Out
-Vin
-Out
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.
-Out
+
Design & Feature Considerations
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.
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.
+Out
Single Output
DC / DC
Converter
DC Power
Source
-
Maximum Capacitive Load
+Vin
-Vin
Cout
-Out
Load
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 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
MCW1000 Series
Mechanical Data
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
Single Output
0.86 (21.8)
0.44
(11.2)
0.02
(0.5)
0.13
(3.2)
0.08
(2.0)
0.02
(0.5)
0.20
(5.08)
0.10
(2.54)
0.01
(0.25)
Bottom
1
2
3
5
6
7
0.36
(9.2)
8
0.12 (3.0)
Tolerance
Pin
Millimeters
Inches
.X{0.25
.XX{0.01
.XX{0.25
.XXX{0.01
{0.05
{0.002
Pin Connections
Physical Characteristics
Pin
Single Output
1
-Vin(GND)
2
+Vin(VCC)
3
Remote ON/OFF
5
No function
6
+Vout
7
-Vout
8
No function
21.8*9.3*11.1mm
Case Size
:
Case Material
:
Non-Conductive Black Plastic
Weight
:
4.8g
Flammability
:
UL94V-0
0.86*0.37*0.44inches
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.