Rev B
ME Series
5600VDC I/O Isolation
Single and Dual Outputs
5~6 Watt Medical DC/DC Converter
FEATURES
●
Efficiency up to 80%
●
Low Leakage Current
●
Single & Dual Outputs
●
5600VDC I/O Isolation
●
Short Circuit Protection
●
MTBF > 700,000 Hours
●
Low Isolation Capacitance
●
2:1 Wide Input Voltage Range
●
Operating Temperature: -40°C to +55°C
●
Medical Safety Approval UL/cUL 60601-1
●
All I/O Clearance and Creepage Distance 2.0mm min.
●
Complies with EN55022 Class A with External Coupling Capacitor Cio=1nF < Class B
DESCRIPTION
The ME series of medical approved (UL/cUL 60601-1) dc/dc converters are specially designed to provide ultra high levels of isolation (5600VDC) in
a 24-pin DIP package. These converters operate over input voltage ranges of 9-18VDC, 18-36VDC, and 36-75VDC. This series also provides
regulated single and dual output voltages of 5, 12, ±12, and ±15VDC. The -40°C to +55°C operating temperature makes this series of dc/dc
converters ideal for data communication equipment, mobile battery driven equipment, distributed power systems, process/machine control
equipment, telecommunications equipment, mixed analog/digital subsystems, computer peripheral systems, and industrial robot systems. These
converters have a power rating of 6W and a typical full load efficiency of 80%. This series complies with EN55022 Class A conducted noise and
radiated emissions with an external coupling capacitor Cio=1nF < Class B. The EN55022 Class A conducted noise compliance minimizes design
time, cost, and eliminates the need for external filter components. All models are over load and short circuit protected.
SPECIFICATIONS:
ME Series
All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
TEST CONDITIONS
Min
Nom
Max
Unit
INPUT (V
in
)
12V nominal input models
9
12
18
Input Voltage Range
VDC
24V nominal input models
18
24
36
48V nominal input models
36
48
75
12V nominal input models
7
8
9
Start Voltage
VDC
24V nominal input models
13
15
18
48V nominal input models
30
33
36
12V nominal input models
8.5
Under Voltage Shutdown
VDC
24V nominal input models
16
48V nominal input models
34
Short Circuit Input Power
All models
3000
mW
12V nominal input models
-0.7
25
Input Surge Voltage (1000ms)
VDC
24V nominal input models
-0.7
50
48V nominal input models
-0.7
100
Input Filter
Pi Filter
Leakage Current
240VAC, 60Hz
2
μA
OUTPUT (V
o
)
Output Voltage
See Table
Output Voltage Accuracy
±0.5
±1.0
%
Output Voltage Balance
Dual Output, Balanced Loads
±0.5
±2.0
%
Load Regulation
Io = 25% to 100%
±0.5
±1.0
%
Line Regulation
Vin = min. to max.
±0.3
±0.5
%
Output Power
See Table
Output Current Range
See Table
5V output models
75
100
Ripple & Noise (20MHz)
mV
pk-pk
Other output models
100
150
Ripple & Noise (20MHz)
Over Line, Over Load, and Over Temperature
180
mV
pk-pk
Ripple & Noise (20MHz)
25
mVrms
Transient Recovery Time
25% load step change
300
500
μs
Transient Response Deviation
25% load step change
±3
±6
%
PROTECTION
Over Load Protection
120
%
Short Circuit Protection
Continuous
12V nominal input models
1200mA slow-blow type
Input Fuse Recommendation
24V nominal input models
600mA slow-blow type
48V nominal input models
300mA slow-blow type
GENERAL
Efficiency
See Table
Switching Frequency
150
KHz
Isolation Voltage Rated
60 seconds
5600
VDC
Isolation Voltage Test
Flash Test for 1 second
6000
VDC
Isolation Resistance
500VDC
1000
MΩ
Isolation Capacitance
100KHz, 1V
7
13
pF
Internal Power Dissipation
2500
mW
Max. Capacitive Load
See Table
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Rev B
ME Series
5600VDC I/O Isolation
Single and Dual Outputs
5~6 Watt Medical DC/DC Converter
SPECIFICATIONS (CONTINUED)
All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
TEST CONDITIONS
Min
Nom
Max
Unit
ENVIRONMENTAL
Operating Temperature (Ambient)
Ambient
-40
+55
°C
Operating Temperature (Case)
Case
-40
+95
°C
Storage Temperature
-40
+125
°C
Over Temperature Protection
Case Temperature, automatic
107
112
117
°C
Lead Temperature
1.5mm from case for 10 seconds
260
°C
Humidity
95
%
Cooling
Free air convection
Temperature Coefficient
±0.02
±0.05
%/°C
MTBF
MIL-HDBK-217F @ 25°C, Ground Benign
700,000 hours
Conducted EMI
EN55022 Class A
PHYSICAL
Weight
18 grams
1.25 x 0.8 x 0.47 inches
Dimensions (L x W x H)
31.8 x 20.3 x 12.0 mm
Case Material
non-conductive black plastic
Flammability
UL94V-0
MODEL SELECTION GUIDES
SINGLE OUTPUT MODELS
Model Number
ME12S5-1000W
ME12S12-500W
ME24S5-1000W
ME24S12-500W
ME48S5-1000W
ME48S12-500W
Input Voltage
12 VDC
(9 ~ 18 VDC)
24 VDC
(18 ~ 36 VDC)
48 VDC
(36 ~ 75 VDC)
Output
Voltage
5 VDC
12 VDC
5 VDC
12 VDC
5 VDC
12 VDC
Output Current
Min
Max
200 mA 1000 mA
100 mA
500 mA
20 mA
Reflected
Output Power
No Load Max Load Ripple Current
30 mA
570 mA
641 mA
278 mA
313 mA
10 mA
139 mA
156 mA
15 mA
30 mA
60 mA
5W
6W
5W
6W
5W
6W
Input Current
Efficiency
Maximum
(Typ)
Capacitive Load
75%
78%
77%
80%
77%
80%
1000
μF
470
μF
1000
μF
470
μF
1000
μF
470
μF
200 mA 1000 mA
100 mA
500 mA
200 mA 1000 mA
100 mA
500 mA
DUAL OUTPUT MODELS
Model Number
ME12D12-250W
ME12D15-200W
ME24D12-250W
ME24D15-200W
ME48D12-250W
ME48D15-200W
# For each output
Input Voltage
12 VDC
(9 ~ 18 VDC)
Output
Voltage
Output Current
Min
Max
Reflected
Output Power
No Load Max Load Ripple Current
30 mA
30 mA
20 mA
20 mA
10 mA
10 mA
641 mA
641 mA
313 mA
313 mA
156 mA
156 mA
25mA
50mA
100mA
6W
6W
6W
6W
6W
6W
Input Current
Efficiency
Maximum
(Typ)
Capacitive Load
78%
78%
80%
80%
80%
80%
220
μF
#
220
μF
#
220
μF
#
220
μF
#
220
μF
#
220
μF
#
±12 VDC ±50 mA ±250 mA
±15 VDC ±40 mA ±200 mA
±12 VDC ±50 mA ±250 mA
24 VDC
(18 ~ 36 VDC) ±15 VDC ±40 mA ±200 mA
±12 VDC ±50 mA ±250 mA
48 VDC
(36 ~ 75 VDC) ±15 VDC ±40 mA ±200 mA
NOTES
1. Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%.
2. The ME series requires a minimum output loading to maintain specified regulations. Operation under no-load conditions will not damage
these devices, however they may not meet all listed specifications.
3. All DC/DC converters should be externally fused at the front end for protection.
4. Other input and output voltages may be available, please contact factory.
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Rev B
ME Series
5600VDC I/O Isolation
Single and Dual Outputs
5~6 Watt Medical DC/DC Converter
BLOCK DIAGRAMS
Single Output
Dual Output
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
12VDC Input Models
24VDC Input Models
48VDC Input Models
DERATING CURVES
Derating Curve (5V Output Models Only)
Derating Curve (For All Other Models)
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Rev B
ME Series
5600VDC I/O Isolation
Single and Dual Outputs
5~6 Watt Medical DC/DC Converter
MECHANICAL DRAWING
Unit: inches (mm)
PIN CONNECTIONS
Pin
1
11
12
13
15
23
24
Single Output
+Vin
No Pin
-Vout
+Vout
No Pin
-Vin
-Vin
Dual Output
+Vin
Common
No Pin
-Vout
+Vout
-Vin
-Vin
1. Tolerance: X.X±0.25 (X.XX±0.01)
X.XX±0.13 (X.XXX±0.005)
2. Pin: ±0.05 (±0.002)
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Rev B
ME Series
5600VDC I/O Isolation
Single and Dual Outputs
5~6 Watt Medical DC/DC Converter
DESIGN & FEATURE CONSIDERATONS
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. A 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 < 1.0Ω at 100KHz)
capacitor of 10μF for the 12V input models, 4.7μF for the 24V input models, and a 2.2μF for the 48V input models.
+
DC Power
Source
-
+
Cin
-Vin
-Out
+Vin
DC / DC
Converter
+Out
Load
Maximum Capacitive Load
The ME Series has a limit of connected capacitance at the output. The power module may operate in current limiting mode
during start-up, which affects the ramp-up and the startup time. Connect capacitors at the point of load for best performance.
The maximum capacitive load can be found in the “Output Voltage / Current Rating Chart” on page 2.
TEST CONFIGURATIONS
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with an inductor Lin (4.7μH) and Cin (220μF, ESR < 1.0Ω at 100KHz) to simulate
source impedance.
To Oscilloscope
+
Battery
+
Lin
+Vin
Current
Probe
+Out
Load
DC / DC
Converter
-Vin
-Out
Cin
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 0.47μF ceramic capacitor.
Scope measurement should be made by using a BNC socket; measurement bandwidth is 0 ~ 20MHz. Position the load
between 50mm and 75mm 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.
Cout
-Out
Scope
Copper Strip
Cout
Scope
Resistive
Load
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
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