MKW5000 Series
25-30W, Wide Input Range, Single Output DC/DC Converters
Key Features
y
y
y
y
y
y
y
y
y
y
y
Efficiency up to 88%
1500VDC Isolation
MTBF > 600,000 Hours
2:1 Wide Input Range
UL1950 Safety Approval
Complies with EN55022 Class A
Six-Sided Shielding
Remote On/Off Control
Soft Start
Over Voltage Protection
Output Trim
Minmax's MKW5000-Series power modules are low-profile dc-dc
converters that operate over input voltage ranges of 18-36VDC and
High
Power
Density
OVP
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
Protection
Remote on/off
2:1
1500
VDC
Wide Range
I/O Isolation
power systems, telecommunication equipments, mixed analog/digital
More Power
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
EMI
EN55022
external filtering.
Block Diagram
LC
Filter
LC
Filter
+Vin
+Vo
A
UVLO
COMPARATORS
-Vo
OVP
-Vin
On/Off
PWM
Isolation
Ref.Amp
Trim
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.
1
MINMAX
REV:0 2005/04
MKW5000 Series
Model Selection Guide
Model
Number
MKW5030
MKW5031
MKW5032
MKW5033
MKW5034
MKW5039
MKW5040
MKW5041
MKW5042
MKW5043
MKW5044
MKW5049
Input
Voltage
Output
Voltage
VDC
VDC
2.5
3.3
5
12
15
5.1
2.5
3.3
5
12
15
5.1
24
( 18 ~ 36 )
48
( 36 ~ 75 )
Output Current
Max.
mA
6000
6000
5000
2500
2000
5000
6000
6000
5000
2500
2000
5000
Min.
mA
0
0
0
166
133
0
0
0
0
166
133
0
Input Current
@Max. Load @No Load
mA (Typ.)
mA (Typ.)
744
50
959
50
1185
70
1420
20
1420
20
1207
70
372
40
480
40
604
50
710
10
710
10
604
50
Absolute Maximum Ratings
Parameter
24VDC Input Models
48VDC Input Models
Lead Temperature (1.5mm from case for 10 Sec.)
Internal Power Dissipation
Input Surge Voltage
( 1000 mS )
Reflected
Ripple
Current
Over
Voltage
Protection
mA (Typ.)
VDC
3
3.9
6.8
15
18
6.8
3
3.9
6.8
15
18
6.8
100
50
Efficiency
@Max. Load
% (Typ.)
84
86
88
88
88
88
84
86
88
88
88
88
Notes :
Min.
-0.7
-0.7
-----
Max.
50
100
260
5500
Unit
VDC
VDC
]
mW
Exceeding the absolute maximum ratings of the unit could cause damage.
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 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.
Environmental Specifications
Parameter
Operating Temperature
Operating Temperature
Storage Temperature
Humidity
Cooling
RFI
Conducted EMI
REV:0 2005/04
Conditions
Ambient
Case
Min.
Max.
-40
+50
-40
+105
-50
+125
--95
Free-Air Convection
Six-Sided Shielded, Metal Case
EN55022 Class A
Unit
]
]
]
%
MINMAX
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.
2
MKW5000 Series
Input Specifications
Parameter
Start Voltage
Under Voltage Shutdown
Over Voltage Shutdown
Model
Typ.
Max.
18
24V Input Models
17
17.5
48V Input Models
34
35
36
24V Input Models
16
16.5
17
48V Input Models
32
33
34
24V Input Models
40
42
44
84
48V Input Models
Reverse Polarity Input Current
Short Circuit Input Power
Min.
All Models
Unit
VDC
80
82
---
---
2
A
---
---
4500
mW
Unit
Input Filter
Pi Filter
Output Specifications
Parameter
Conditions
Min.
Typ.
Max.
---
{0.5
{1.0
%
Vin=Min. to Max.
---
{0.1
{0.3
%
Load Regulation (2.5/3.3/5/5.1Vout)
Io=0% to 100%
---
{0.5
{1.0
%
Load Regulation
Io=10% to 100%
---
{0.5
{1.0
%
---
75
100
mV P-P
Output Voltage Accuracy
Line Regulation
(12/15Vout)
Ripple & Noise (20MHz)
---
---
120
mV P-P
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
---
---
10
mV rms
Over Power Protection
110
---
160
%
---
200
500
uS
---
{2
{5
%
---
{0.01
{0.02
%/]
Transient Recovery Time
Transient Response Deviation
Over Line, Load & Temp.
25% Load Step Change
Temperature Coefficient
Output Short Circuit
Continuous
General Specifications
Parameter
Isolation Voltage Rated
Isolation Voltage Test
Conditions
Min.
Typ.
Max.
Unit
60 Seconds
1500
---
---
VDC
Flash Tested for 1 Second
1650
---
---
VDC
Isolation Resistance
500VDC
1000
---
---
M[
Isolation Capacitance
100KHz,1V
---
1200
1500
pF
280
350
400
KHz
600
---
---
K Hours
Min.
Typ.
Max.
Unit
Switching Frequency
MTBF
MIL-HDBK-217F @ 25], Ground Benign
Remote On/Off Control
Parameter
Conditions
Supply On
2.5 to 100VDC or Open Circuit
Supply Off
Device Standby Input Current
-1
---
1
VDC
---
2
5
mA
Control Input Current ( on )
Vin-RC=5.0V
---
---
5
uA
Control Input Current ( off )
Vin-RC=0V
---
---
-100
uA
Control Common
3
Referenced to Negative Input
MINMAX
REV:0 2005/04
MKW5000 Series
Capacitive Load
Models by Vout
Maximum Capacitive Load
2.5V
3.3V
5V
5.1V
12V
15V
Unit
6800
6800
6800
6800
680
680
uF
Input Fuse Selection Guide
24V Input Models
48V Input Models
3000mA Slow - Blow Type
1500mA Slow - Blow Type
Output Voltage Trim
Parameter
Trim Up / Down Range
Conditions
Min.
Typ.
Max.
Unit
% of nominal output voltage
{9.0
{10.0
{11.0
%
Input Voltage Transient Rating
150
140
130
120
48VDC Input Models
110
Vin ( VDC )
100
90
80
24VDC Input Models
70
60
50
40
30
20
10
0
10uS
REV:0 2005/04
100uS
1mS
MINMAX
10mS
100mS
4
MKW5000 Series
100
100
90
80
Efficiency (%)
Efficiency (%)
90
80
70
70
60
50
40
60
30
50
Low
Nom
20
High
10
Input Voltage (V)
Efficiency vs Input Voltage
20
40
60
Load Current (%)
80
100
Efficiency vs Output Load
100
400LFM
Output Power (%)
80
Natural
convection
60
200LFM
100LFM
40
20
0
〜
-40
50
60
70
90
80
Ambient Temperature
100
110
]
Derating Curve
5
MINMAX
REV:0 2005/04
MKW5000 Series
Test Configurations
Input Reflected-Ripple Current Test Setup
+
Battery
+
+Vin
Lin
Current
Probe
Cin
+Out
DC / DC
Converter
-Vin
+Out
-Vin
-Out
Trim Down
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.
To Oscilloscope
+Vin
Trim Up
Enable
Load
-Out
Single Output
DC / DC
Converter
-Vin
Connecting the external resistor (Radj-down) between the
Trim and +Vout pins decreases the output voltage set point as
defined in the following equation:
Radj-down =
Copper Strip
Cout
Scope
(33*Vout)- (30*Vadj)
Vadj - Vout
Radj-up =
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.
+Out
Trim
Up/Down
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:
Peak-to-Peak Output Noise Measurement Test
+Vin
Trim
10K
Resistive
Load
(36.667*Vadj) - (33*Vout)
Vout-Vadj
Vout : Nominal Output Voltage
Vadj : Adjusted Output Voltage
-Out
Units : VDC/ K[
Design & Feature Considerations
Overcurrent Protection
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.
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.
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.
REV:0 2005/04
MINMAX
6
MKW5000 Series
Input Source Impedance
Thermal Considerations
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.
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.
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.
Position of air velocity
probe and thermocouple
15mm / 0.6in
+
DC Power
Source
+Vin
+
50mm / 2in
Air Flow
DUT
+Out
DC / DC
Converter
Load
Cin
-
-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 4.7uF
capacitors at the output.
+
+Vin
Single Output
DC / DC
Converter
DC Power
Source
-
+Out
-Vin
Cout
Load
-Out
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.
7
MINMAX
REV:0 2005/04
MKW5000 Series
Mechanical Dimensions
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
25.4 [1.0]
10.20 [0.4]
15.24 [0.6]
10.16 [0.4]
1.0[0.04]
1
6
5
50.80 [2.0]
2
45.72 [1.8]
3
5.08 [0.2]
4
10.16 [0.4]
20.32 [0.8]
Tolerance
Pin
Millimeters
Inches
X.X{0.25
X.XX{0.01
X.XX{0.13
{0.05
X.XXX{0.005
{0.002
Pin Connections
Physical Characteristics
Pin
Function
1
+Vin
2
-Vin
3
Remote On/Off
4
+Vout
5
-Vout
6
Trim
50.8*25.4*10.2 mm
Case Size
:
Case Material
:
Aluminum Anodizing Treatment in
Black
Weight
:
32g
2.0*1.0*0.4 inches
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.
REV:0 2005/04
MINMAX
8