Download Data Sheet

Rev A
MM Series
Single and Dual Output
2:1 Input Voltage Range
25~30 Watt DC/DC Converter
FEATURES
● Soft Start
● Output Trim
● 1500VDC Isolation
● Six-Sided Shielding
● Efficiency up to 89%
● Single & Dual Outputs
● Remote On/Off Control
● MTBF > 1,000,000 Hours
● Low Profile: 0.37” (9.3mm)
● CSA60950-1 Safety Approval
● 2:1 Wide Input Voltage Range
● Complies with EN55022 Class A
● Short Circuit, Over Voltage, and Over Temperature Protected
DESCRIPTION
The MM series power modules are low-profile dc/dc converters that offer up to 30 watts of output power in a 2 x 1.6 x 0.37 inch 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 3.3, 5, 12, 15, ±12 and ±15VDC. Other features include remote on/off control, output trim function, six-sided
shielding, and efficiencies up to 89%. All models are over voltage, over temperature and short circuit protected. The EN55022 Class A
conducted noise compliance minimizes design time, cost, and eliminates the need for external filter components. These converters are
best suited for data communication equipment, mobile battery driven equipment, distributed power systems, telecommunications
equipment, mixed analog/digital subsystems, process/machine control equipment, computer peripheral systems, and industrial robot
systems.
SPECIFICATIONS: MM 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 (Vin)
12V nominal input models
9
12
18
VDC
Input Voltage Range
24V nominal input models
18
24
36
VDC
48V nominal input models
36
48
75
VDC
12V nominal input models
8.6
8.8
9
VDC
Start Voltage
24V nominal input models
17
17.5
18
VDC
48V nominal input models
34
35
36
VDC
12V nominal input models
8.1
8.3
8.5
VDC
Under Voltage Shutdown
24V nominal input models
16
16.5
17
VDC
48V nominal input models
32
33
34
VDC
Reverse Polarity Input Current
All models
2
A
Short Circuit Input Power
4500
mW
12V nominal input models
-0.7
25
VDC
Input Surge Voltage
24V nominal input models
-0.7
50
VDC
48V nominal input models
-0.7
100
VDC
Input Filter
Pi Filter
OUTPUT (Vo)
Output Voltage Range
See Rating Chart
Output Voltage Accuracy
±0.5
±1.0
%
Output Voltage Balance
Dual Output, Balanced Loads
±0.5
±2.0
%
Output Trim
±10
%
Load Regulation
Io = 10% to 100%
±0.1
±0.5
%
Line Regulation
Vin = min. to max.
±0.1
±0.3
%
Output Power
30
W
Output Current Range
See Rating Chart
Ripple & Noise (20MHz)
55
80
mVpk-pk
Ripple & Noise (20MHz)
Over Line, Over Load, and Over Temperature
100
mVpk-pk
Ripple & Noise (20MHz)
10
mVrms
Transient Recovery Time
25% load step change
150
300
μs
Transient Response Deviation
±2
±4
%
REMOTE ON/OFF
Supply On
2.5 to 100VDC or Open Circuit
Supply Off
-1
1
VDC
Standby Input Current
2
5
mA
Control Input Current (On)
Vin – RC = 5.0V
5
μA
Control Input Current (Off)
Vin – RC = 0V
-100
μA
Control Common
Referenced to negative input
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
MM Series
Single and Dual Output
2:1 Input Voltage Range
25~30 Watt DC/DC Converter
Rev A
SPECIFICATION
PROTECTION
Over Power Protection
Short Circuit Protection
TEST CONDITIONS
Min
110
12V nominal input models
24V nominal input models
48V nominal input models
Input Fuse Recommendation
GENERAL
Efficiency
Switching Frequency
Isolation Voltage Rated
Isolation Voltage Test
Isolation Resistance
Isolation Capacitance
Internal Power Dissipation
Max. Capacitive Load
ENVIRONMENTAL
Operating Temperature (Ambient)
Operating Temperature (Case)
Storage Temperature
Over Temperature Protection
Lead Temperature
Humidity
Cooling
RFI
Temperature Coefficient
MTBF
Conducted EMI
PHYSICAL
Weight
290
1500
1650
1000
60 seconds
Flash Test for 1 second
500VDC
100KHz, 1V
Nom
Max
Unit
160
Continuous
6000mA slow-blow type
3000mA slow-blow type
1500mA slow-blow type
See Rating Chart
330
360
1200
1500
5,500
See Rating Chart
%
KHz
VDC
VDC
MΩ
pF
mW
-40
-40
-50
107
Case Temperature, automatic
1.5mm from case for 10 seconds
MIL-HDBK-217F @ 25°C, Ground Benign
+50
°C
+105
°C
+125
°C
112
117
°C
260
°C
95
%
Free air convection
Six-sided shielding, metal case
±0.01
±0.02
%/°C
1000
Khours
EN55022 Class A
48 grams (heatsink 2g)
2.0 x 1.6 x 0.37 inches
50.8 x 40.6 x 9.3 mm
Metal with non-conductive baseplate
UL94V-0
Aluminum
Anodic treatment (black)
Dimensions (L x W x H)
Case Material
Flammability
Heatsink material
Heatsink finish
OUTPUT VOLTAGE / CURRENT RATING CHART
SINGLE OUTPUT MODELS
Model Number
MM12S3.3-5500
MM12S5-5000
MM12S12-2500
MM12S15-2000
MM24S3.3-5500
MM24S5-5000
MM24S12-2500
MM24S15-2000
MM48S3.3-5500
MM48S5-5000
MM48S12-2500
MM48S15-2000
Model Number
MM12D12-1250
MM12D15-1000
MM24D12-1250
MM24D15-1000
MM48D12-1250
MM48D15-1000
Input Voltage
Output Current
Input Current
Reflected
Efficiency
(Typ)
Min
Max
No Load Max Load Ripple Current
400 mA 5500 mA
1867 mA
81%
350 mA 5000 mA
2480 mA
84%
40 mA
100 mA
166 mA 2500 mA
2841 mA
88%
133 mA 2000 mA
2841 mA
88%
300 mA 5500 mA
922 mA
82%
300 mA 5000 mA
1225 mA
85%
20 mA
50 mA
300 mA 2500 mA
1404 mA
89%
125 mA 2000 mA
1404 mA
89%
300 mA 5500 mA
461 mA
82%
300 mA 5000 mA
613 mA
85%
10 mA
25 mA
300 mA 2500 mA
702 mA
89%
125 mA 2000 mA
702 mA
89%
Output
Voltage
3.3 VDC
5 VDC
12 VDC
15 VDC
3.3 VDC
24 VDC
5 VDC
(18 ~ 36 VDC) 12 VDC
15 VDC
3.3 VDC
48 VDC
5 VDC
(36 ~ 75 VDC) 12 VDC
15 VDC
12 VDC
(9 ~ 18 VDC)
DUAL OUTPUT MODELS
Output Current
Input Current
Output
Input Voltage
Voltage
±12 VDC
±15 VDC
±12 VDC
24 VDC
(18 ~ 36 VDC) ±15 VDC
±12 VDC
48 VDC
(36 ~ 75 VDC) ±15 VDC
12 VDC
(9 ~ 18 VDC)
Min
Max
±83
±65
±83
±65
±83
±65
±1250
±1000
±1250
±1000
±1250
±1000
Reflected
Efficiency
(Typ)
No Load Max Load Ripple Current
40mA
40mA
20mA
20mA
10mA
10mA
2841 mA
2841 mA
1404 mA
1404 mA
702 mA
702 mA
100mA
50mA
25mA
# For each output
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
88%
88%
89%
89%
89%
89%
Over Voltage
Maximum
Protection Capacitive Load
3.9 VDC
6.8 VDC
15 VDC
18 VDC
3.9 VDC
6.8 VDC
15 VDC
18 VDC
3.9 VDC
6.8 VDC
15 VDC
18 VDC
Over Voltage
Protection
±15 VDC
±18 VDC
±15 VDC
±18 VDC
±15 VDC
±18 VDC
470 μF
470 μF
470 μF
470 μF
470 μF
470 μF
470 μF
470 μF
470 μF
470 μF
470 μF
470 μF
Maximum
Capacitive
Load
220 μF #
220 μF #
220 μF #
220 μF #
220 μF #
220 μF #
MM Series
Single and Dual Output
2:1 Input Voltage Range
25~30 Watt DC/DC Converter
Rev A
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 MM 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.
5. Heat-sink is optional, please consult factory for ordering details.
Due to advances in technology, specifications subject to change without notice.
BLOCK DIAGRAMS
Single Output
+Vin
Dual Output
+Vo
LC
Filter
+Vin
+Vo
LC
Filter
Com.
-Vo
OVP
OTP
-Vo
OVP
OTP
OVP
-Vin
OVP
-Vin
PWM
On/Off
Isolation
Ref.Amp
On/Off
Trim
PWM
Isolation
Ref.Amp
Trim
INPUT VOLTAGE TRANSIENT RATING
150
140
130
48VDC Input Models
120
110
Vin ( VDC )
100
90
80
24VDC Input Models
70
60
50
12VDC Input Models
40
30
20
10
0
10uS
100uS
1mS
10mS
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
100mS
MM Series
Single and Dual Output
2:1 Input Voltage Range
25~30 Watt DC/DC Converter
Rev A
DERATING CURVES & EFFICIENCY GRAPHS
Efficiency vs Input Voltage (Single Output)
Efficiency vs Input Voltage (Dual Output)
100
100
90
Efficiency (%)
Efficiency (%)
90
80
70
80
70
60
60
50
Low
Nom
50
High
Low
Nom
Input Voltage (V)
Input Voltage (V)
Efficiency vs Output Load (Single Output)
Efficiency vs Output Load (Dual Output)
100
100
90
90
80
80
Efficiency (%)
Efficiency (%)
High
70
60
50
70
60
50
40
40
30
10
20
40
60
80
30
100
10
20
40
80
60
Load Current (%)
Load Current (%)
Derating Curve without Heatsink
Derating Curve with Heatsink
100
100
100
400LFM
400LFM
80
Natural
convection
100LFM
Output Power (%)
Output Power (%)
80
60
Natural
convection
200LFM
40
200LFM
60
100LFM
40
20
20
0
~
¡ã
0
-40
50
60
70
80
90
100
110
~
-40
50
60
Ambient Temperature (°C)
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
70
80
Ambient Temperature (°C)
90
100
110
MM Series
Single and Dual Output
2:1 Input Voltage Range
25~30 Watt DC/DC Converter
Rev A
MECHANICAL DRAWINGS
Standard
With Heatsink
Unit: mm [inches]
40.6 [1.60]
7
9.3[0.37]
8
16.3[0.64]Max
Side
0.039]
Bottom
50.8 [2.00]
6
45.70 [1.801]
5
6.0 [0.24]
5.0 [0.20]
23.0[0.91]
10.20 [0.402] 10.20 [0.402] 10.20 [0.402]
55.32[2.18]Max
1.00[
Heat-sink
1
2
Thermal pad
4
Clamp
Converter
2.5 [0.10]
7.6 [0.30]
5.10 [0.201]
1. Tolerance: X.X±0.25 [X.XX±0.01]
X.XX±0.13 [X.XXX±0.005]
2. Pin: ±0.05 [±0.002]
Advantages of adding a Heatsink:
PIN CONNECTIONS
PIN
SINGLE OUTPUT
DUAL OUTPUT
1
+Vin
+Vin
2
-Vin
-Vin
4
Remote ON/OFF
Remote ON/OFF
5
No Pin
+Vout
6
+Vout
Common
7
-Vout
-Vout
8
Trim
Trim
1. To help heat dissipation and increase the stability and
reliability of the DC/DC converter at high operating
temperature
2. To upgrade the operating temperature of the DC/DC
converter. Please refer to the Derating Curve.
The MM Series converter is encapsulated in a low thermal resistance molding compound that has excellent
resistance/electrical characteristics over a wide temperature range or in high humidity environments.
The encapsulant and unit case are both rated to UL 94V-0 flammability specifications. Leads are tin plated for improved
solderability.
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
MM Series
Single and Dual Output
2:1 Input Voltage Range
25~30 Watt DC/DC Converter
Rev A
DESIGN & FEATURE CONSIDERATONS
Remote On/Off
Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin, and turns the module off
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 low is -1V to 1.0V.
A logic high is 2.5V to 100V.
The maximum sink current at the on/off terminal (pin 4) during a logic low is -100μA. The maximum allowable leakage
current of the switch at the on/off terminal (pin 4) during a logic high (2.5 to 100V) is 5μA.
Output Voltage Trim
Output voltage trim allows the user to increase or decrease the output voltage set point of a module. The output voltage can
be adjusted by placing an external resistor (R) between the Trim and +Vout or –Vout terminals. By adjusting R, the output
voltage can be changed by ±10% of the nominal output voltage.
+Out
+Vin
Trim Down
-Vin
10K
-Out
Trim Up
Enable
Trim
Up/Down
Trim
A 10K, 1 or 10 turn trimpot is usually specified for continuous trimming. Trim pin may be safely left floating if it is not being
used. Connecting the external resistor (Rup) between the Trim and –Vout pins increases the output voltage to set the point as
defined in the following equation:
Rup =
(33 x Vout) - (30 x Vadj)
Vadj - Vout
Connecting the external resistor (Rdown) between the Trim and +Vout pins decreases the output voltage set point as defined
in the following equation:
Rdown =
Vout:
Vadj:
Units
(36.667 x Vadj) - (33 x Vout)
Vout - Vadj
Nominal Output Voltage
Adjusted Output Voltage
VDC / KΩ
Over Current 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.
Over Voltage Protection
The output over voltage clamp consists of control circuitry that is dependent on the primary regulation loop that monitors the
voltage on the output terminals. The control loop of the clamp has a higher voltage set point than the primary loop. This
provides a redundant voltage control that reduces the risk of an output over voltage. The OVP level can be found in the
protection specifications.
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
MM Series
Single and Dual Output
2:1 Input Voltage Range
25~30 Watt DC/DC Converter
Rev A
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 a 33μF for the 12V input models and a 10μF for the 24V and 48V input models.
+
+Vin
+
DC Power
Source
+Out
DC / DC
Converter
Load
Cin
-
-Vin
-Out
Maximum Capacitive Load
The MM Series has a 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. For optimum performance we recommend
330μF maximum capacitive load for 12V and 15V outputs and 10,000μF capacitive load for 3.3V and 5V outputs. The
maximum capacitance can be found in the Output Voltage / Current Rating Chart.
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
+Vin
Lin
Cin
Current
Probe
+Out
DC / DC
Converter
-Vin
Load
-Out
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 1.0μF 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
+Out
Single Output
DC / DC
Converter
-Vin
Copper Strip
Cout
-Out
+Vin
Resistive
Scope
Load
+Out
Copper Strip
Cout
Dual Output
DC / DC
Converter
Com.
-Vin
-Out
Resistive
Load
Cout
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Scope
Scope
MM Series
Single and Dual Output
2:1 Input Voltage Range
25~30 Watt DC/DC Converter
Rev A
Output Ripple Reduction
A good quality low ESR capacitor placed as close as possible across the load will give the best ripple and noise performance.
To reduce output ripple, it is recommended to use 4.7μF capacitors at the output.
+
+Vin
Single Output
DC / DC
Converter
DC Power
Source
-
+Out
-Vin
+
+Vin
Dual Output
Com.
DC / DC
Converter
DC Power
Source
Cout
Load
-
-Out
+Out
-Vin
-Out
Cout
Load
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 105°C. The derating curves are determined from measurements obtained in an experimental
apparatus.
Position of air velocity
probe and thermocouple
50mm / 2in
15mm / 0.6in
Air Flow
DUT
COMPANY INFORMATION:
Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and development
engineers will provide a solution that exceeds your performance requirements on time and on budget. Our ISO9001-2000
certification is just one example of our commitment to producing a high quality, well documented product for our customers.
Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working
closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to
provide ongoing support for your project above and beyond the design and production phases. Give us a call today to
discuss your future projects.
Contact Wall Industries for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
(603)778-2300
(888)587-9255
(603)778-9797
sales@wallindustries.com
www.wallindustries.com
5 Watson Brook Rd.
Exeter, NH 03833
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797