A: 2.5V, 3.3V, 5V and 5.1V-output models use the synchronous-rectifier configuration shown as above.
12V and 15V-output models employ a standard, diode-rectification architecture.
+Vo
PWM
Isolation
Ref.Amp
+Vin
-Vin
-Vo
On/Off
Trim
OVP
LC
Filter
LC
Filter
UVLO
COMPARATORS
A
Block Diagram
EN55022
EMI
I/O Isolation
1500
VDC
Wide Range
2:1
More Power
High
Power
Density
Remote on/off
Protection
OVP
Minmax's MKW5000-Series power modules are low-profile dc-dc
converters that operate over input voltage ranges of 18-36VDC and
36-75VDC which provide precisely regulated output voltages of 2.5V,
3.3V, 5V, 5.1V, 12V and 15VDC, specially addressing 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.
Packing up to 30W of power into a 2x1x0.4inch package, with
efficiencies as high as 88%, the MKW5000 includes continuous short
circuit protection, overvoltage protection, output trim function, remote
on/off, six-sided shielded case and EN55022 Class A conducted noise
compliance minimize design-in time, cost and eliminate the need for
external filtering.
Output Trim
Over Voltage Protection
Soft Start
Remote On/Off Control
Six-Sided Shielding
Complies with EN55022 Class A
UL1950 Safety Approval
2:1 Wide Input Range
MTBF > 600,000 Hours
1500VDC Isolation
Efficiency up to 88%
Key Features
25-30W, Wide Input Range, Single Output DC/DC Converters
MKW5000 Series
REV:0 2005/04
MINMAX
1
88
6.8
50
604
0
5000
5.1
MKW5049
88
18
10
710
133
2000
15
MKW5044
88
15
10
710
166
2500
12
MKW5043
88
6.8
50
604
0
5000
5
MKW5042
86
3.9
40
480
0
6000
3.3
MKW5041
84
3
50
40
372
0
6000
2.5
48
( 36 ~ 75 )
MKW5040
88
6.8
70
1207
0
5000
5.1
MKW5039
88
18
20
1420
133
2000
15
MKW5034
88
15
20
1420
166
2500
12
MKW5033
88
6.8
70
1185
0
5000
5
MKW5032
86
3.9
50
959
0
6000
3.3
MKW5031
84
3
100
50
744
0
6000
2.5
24
( 18 ~ 36 )
MKW5030
% (Typ.)
VDC
mA (Typ.)
mA (Typ.)
mA (Typ.)
mA
mA
VDC
VDC
@Max. Load
@No Load
@Max. Load
Min.
Max.
Efficiency
Over
Voltage
Protection
Reflected
Ripple
Current
Input Current
Output Current
Output
Voltage
Input
Voltage
Model
Number
Model Selection Guide
EN55022 Class A
Conducted EMI
Six-Sided Shielded, Metal Case
RFI
Free-Air Convection
Cooling
%
95
---
Humidity
]
+125
-50
Storage Temperature
]
+105
-40
Case
Operating Temperature
]
+50
-40
Ambient
Operating Temperature
Unit
Max.
Min.
Conditions
Parameter
Environmental Specifications
Exceeding the absolute maximum ratings of the unit could cause damage.
These are not continuous operating ratings.
mW
5500
---
Internal Power Dissipation
]
260
---
Lead Temperature (1.5mm from case for 10 Sec.)
VDC
100
-0.7
48VDC Input Models
VDC
50
-0.7
24VDC Input Models
Input Surge Voltage
( 1000 mS )
Unit
Max.
Min.
Parameter
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 at
the front end for protection.
7. Other input and output voltage may be available,
please contact factory.
8. To order the converter with Remote On/Off
function, please add a suffix -RC (e.g.
MKW5030-RC).
9.To order the converter with EN55022 Class A
function, please add a suffix A (e.g. MKW5030A).
10. Specifications subject to change without notice.
Absolute Maximum Ratings
MKW5000 Series
2
MINMAX
REV:0 2005/04
K Hours
---
---
600
MIL-HDBK-217F @ 25], Ground Benign
MTBF
KHz
400
350
280
Switching Frequency
pF
1500
1200
---
100KHz,1V
Isolation Capacitance
M[
---
---
1000
500VDC
Isolation Resistance
VDC
---
---
1650
Flash Tested for 1 Second
Isolation Voltage Test
VDC
---
---
1500
60 Seconds
Isolation Voltage Rated
Unit
Max.
Typ.
Min.
Conditions
Parameter
General Specifications
Continuous
Output Short Circuit
%/]
{0.02
{0.01
---
Temperature Coefficient
%
{5
{2
---
Transient Response Deviation
uS
500
200
---
25% Load Step Change
Transient Recovery Time
%
160
---
110
Over Power Protection
mV rms
10
---
---
Ripple & Noise (20MHz)
mV P-P
120
---
---
Over Line, Load & Temp.
Ripple & Noise (20MHz)
mV P-P
100
75
---
Ripple & Noise (20MHz)
%
{1.0
{0.5
---
Io=10% to 100%
Load Regulation (12/15Vout)
%
{1.0
{0.5
---
Io=0% to 100%
Load Regulation (2.5/3.3/5/5.1Vout)
%
{0.3
{0.1
---
Vin=Min. to Max.
Line Regulation
%
{1.0
{0.5
---
Output Voltage Accuracy
Unit
Max.
Typ.
Min.
Conditions
Parameter
Output Specifications
Pi Filter
Input Filter
mW
4500
---
---
Short Circuit Input Power
A
2
---
---
All Models
Reverse Polarity Input Current
84
82
80
48V Input Models
44
42
40
24V Input Models
Over Voltage Shutdown
34
33
32
48V Input Models
17
16.5
16
24V Input Models
Under Voltage Shutdown
36
35
34
48V Input Models
VDC
18
17.5
17
24V Input Models
Start Voltage
Unit
Max.
Typ.
Min.
Model
Parameter
Input Specifications
Referenced to Negative Input
Control Common
uA
-100
---
---
Vin-RC=0V
Control Input Current ( off )
uA
5
---
---
Vin-RC=5.0V
Control Input Current ( on )
mA
5
2
---
Device Standby Input Current
VDC
1
---
-1
Supply Off
2.5 to 100VDC or Open Circuit
Supply On
Unit
Max.
Typ.
Min.
Conditions
Parameter
Remote On/Off Control
MKW5000 Series
REV:0 2005/04
MINMAX
3
uF
680
680
6800
6800
6800
6800
Maximum Capacitive Load
Unit
15V
12V
5.1V
5V
3.3V
2.5V
Models by Vout
Capacitive Load
1500mA Slow - Blow Type
3000mA Slow - Blow Type
48V Input Models
24V Input Models
Input Fuse Selection Guide
%
{11.0
{10.0
{9.0
% of nominal output voltage
Trim Up / Down Range
Unit
Max.
Typ.
Min.
Conditions
Parameter
Output Voltage Trim
Vin ( VDC )
10uS
150
140
130
120
110
100
90
80
70
60
100uS
1mS
10mS
100mS
50
40
30
20
10
0
48VDC Input Models
24VDC Input Models
Input Voltage Transient Rating
MKW5000 Series
4
MINMAX
REV:0 2005/04
Derating Curve
]
Ambient Temperature
Output Power (%)
0
20
40
60
80
100
-40
50
60
80
100
110
90
70
400LFM
200LFM
100LFM
Natural
convection
Efficiency vs Output Load
Efficiency vs Input Voltage
20
30
40
50
60
70
80
90
100
Efficiency (%)
Load Current (%)
100
60
40
20
10
80
50
60
70
80
90
100
Efficiency (%)
Input Voltage (V)
Nom
Low
High
MKW5000 Series
REV:0 2005/04
MINMAX
5
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
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 1.0uF 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.
Design & Feature Considerations
Remote On/Off
Positive logic remote on/off turns the module on during a
logic high voltage on the remote on/off pin, and 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 3)
during a logic low is -100uA.
The maximum allowable leakage current of a switch
connected to the on/off terminal (Pin 3) at logic high (2.5V to
100V) is 5uA.
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 (Radj) between the Trim and +Vout or -Vout
terminals. By adjusting Radj, the output voltage can be
change by {10% of the nominal output voltage.
A 10K, 1 or 10 Turn trimpot is usually specified for
continuous trimming. Trim pin may be safely left floating if it is
not used.
Connecting the external resistor (Radj-up) between the
Trim and -Vout pins increases the output voltage to set the
point as defined in the following equation:
Vadj - Vout
(33*Vout)- (30*Vadj)
Radj-up =
Connecting the external resistor (Radj-down) between the
Trim and +Vout pins decreases the output voltage set point as
defined in the following equation:
Vout-Vadj
(36.667*Vadj) - (33*Vout)
Radj-down =
VDC/ K[
:
Units
Adjusted Output Voltage
:
Vadj
Nominal Output Voltage
:
Vout
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.
Overvoltage Protection
The output overvoltage clamp consists of control circuitry,
which is independent of 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 output overvoltage.
The OVP level can be found in the output data.
MKW5000 Series
6
MINMAX
REV:0 2005/04
+Out
-Out
+Vin
-Vin
DC / DC
Converter
Load
Battery
+
Lin
+
Cin
To Oscilloscope
Current
Probe
+Out
-Out
+Vin
-Vin
Single Output
DC / DC
Converter
Resistive
Load
Scope
Copper Strip
Cout
+Out
-Out
+Vin
-Vin
Trim Up
Enable
Trim
Trim Down
10K
Trim
Up/Down
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 33uF for the 12V input devices and a 10uF
for the 24V and 48V devices.
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 4.7uF
capacitors at the output.
Maximum Capacitive Load
The MKW5000 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.
For optimum performance we recommend 680uF
maximum capacitive load for 12V & 15V outputs and 6800uF
capacitive load for the other outputs.
The maximum capacitance can be found in the data sheet.
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 105C.
The derating curves are determined from measurements
obtained in an experimental apparatus.
.
MKW5000 Series
REV:0 2005/04
MINMAX
7
+
+Out
-Out
+Vin
-Vin
DC / DC
Converter
Load
DC Power
Source
+
-
Cin
+Out
-Out
+Vin
-Vin
Load
DC Power
Source
+
-
Cout
Single Output
DC / DC
Converter
DUT
Position of air velocity
probe and thermocouple
50mm / 2in
Air Flow
15mm / 0.6in
The MKW5000 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.
32g
:
Weight
Trim
6
-Vout
5
+Vout
4
Aluminum Anodizing Treatment in
Black
:
Case Material
Remote On/Off
3
-Vin
2
2.0*1.0*0.4 inches
+Vin
1
50.8*25.4*10.2 mm
:
Case Size
Function
Pin
Physical Characteristics
Pin Connections
{0.002
{0.05
Pin
X.XXX{0.005
X.XX{0.13
X.XX{0.01
X.X{0.25
Inches
Millimeters
Tolerance
45.72 [1.8]
50.80 [2.0]
25.4 [1.0]
10.16 [0.4]
15.24 [0.6]
5.08 [0.2]
10.20 [0.4]
10.16 [0.4]
20.32 [0.8]
1
2
3
4
5
6
1.0[0.04]
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
Mechanical Dimensions
MKW5000 Series
8
MINMAX
REV:0 2005/04
PDF 
ZIP