The MINMAX MKW2000 series is a range of isolated 12W DC/DC converter modules featuring fully regulated output voltages and ultra-wide 4:1 input
voltage ranges.The product comes in a 2”x 1”x 0.4” metal package with industry standard pinout. An excellent efficiency allows an operating temperature
range of –40° to +85°C (with derating).
Typical applications for these converters are in battery operated equipment and instrumentation, distributed power systems, data communication and
general industrial electronics.
Model Selection Guide
Model
Number
Input
Voltage
(Range)
VDC
MKW2021
MKW2022
MKW2023
MKW2024
MKW2025
MKW2026
MKW2027
MKW2031
MKW2032
MKW2033
MKW2034
MKW2035
MKW2036
MKW2037
VDC
3.3
5
12
15
±5
±12
±15
3.3
5
12
15
±5
±12
±15
Output
Voltage
Max.
mA
2400
2000
1000
800
±1000
±500
±400
2400
2000
1000
800
±1000
±500
±400
Output
Current
Min.
mA
240
200
100
80
±100
±50
±40
240
200
100
80
±100
±50
±40
@Max. Load
mA(typ.)
423
508
595
595
508
595
595
212
254
298
298
254
298
298
@No Load
mA(typ.)
Input Current
Over
Voltage
Protection
VDC(typ.)
3.9
6.8
15
18
±6.8
±15
±18
3.9
6.8
15
18
±6.8
±15
±18
μF
470
Max. capacitive
Load
Efficiency
(typ.)
@Max. Load
%
78
82
84
84
82
84
84
78
82
84
84
82
84
84
24
(9 ~ 36)
10
150#
470
48
(18 ~ 75)
5
150#
# For each output
Input Specifications
Parameter
Input Surge Voltage (1 sec. max.)
Start-Up Threshold Voltage
Under Voltage Shutdown
Reverse Polarity Input Current
Short Circuit Input Power
Internal Power Dissipation
Conducted EMI
Model
24V Input Models
48V Input Models
24V Input Models
48V Input Models
24V Input Models
48V Input Models
Min.
-0.7
-0.7
Typ.
Max.
Unit
42
---
84
---
8
8.5
9
VDC
14
16
18
7
8
8.5
13
15
17
---
---
1
A
---
---
3500
mW
---
---
5000
mW
Compliance to EN 55022,class A and FCC part 15,class A
Operating Ambient Temperature Range (See Power Derating Curve)
Case Temperature
Storage Temperature Range
Humidity (non condensing)
Cooling
Lead Temperature (1.5mm from case for 10Sec.)
Conditions
Natural Convection
Min.
-40
---
-50
---
Free-Air convection
---
260
℃
Max.
+85
+90
+125
95
Unit
℃
℃
℃
% rel. H
Power Derating Curve
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2012/03/19 REV:4
Page 2 of 4
Output Power (%)
®
MKW2000 SERIES
DC/DC CONVERTER 12W
Notes
1
2
3
4
5
6
7
8
9
Specifications typical at Ta=+25℃, resistive load, nominal input voltage and rated output current unless otherwise noted.
Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%
Ripple & Noise measurement bandwidth is 0-20MHz.
These power converters require a minimum output loading to maintain specified regulation, operation under no-load conditions will not damage these modules;
however they may not meet all specifications listed.
All DC/DC converters should be externally fused at the front end for protection.
Other input and output voltage may be available, please contact factory.
To order the converter with Remote On/Off function, add
suffix RC
(e.g. MKW2021-RC) to order code.
That “natural convection” is about 20LFM but is not equal to still air (0 LFM).
Specifications subject to change without notice.
Package Specifications
Mechanical Dimensions
2.54
[0.10]
10.16
[0.40]
10.16
[0.40]
Pin Connections
Pin
Single Output
1
+Vin
2
3
4
5
1.00
[
0.04]
Dual Output
+Vin
-Vin
+Vout
Common
-Vout
Remote On/Off
-Vin
+Vout
No Pin
-Vout
Remote On/Off
NC: No Connection
3
4
5
6
20.32 [0.80]
50.8 [2.00]
Bottom View
1
2
6
15.2 [0.60]
►
All
7.62
5.08
[0.30] [0.20]
7.62
[0.30]
6.0
[0.24]
10.2
[0.40]
dimensions in mm (inches)
(X.XX±0.01)
X.XX±0.13 ( X.XXX±0.005)
►
Tolerance: X.X±0.25
25.4 [1.00]
►
Pin
diameter
1.0 ±0.05 (0.04±0.002)
Physical Characteristics
Case Size
Case Material
Pin Material
Weight
:
:
:
:
50.8x25.4x10.2mm (2.0x1.0x0.4 inches)
Metal with Non-Conductive Baseplate
Copper Alloy with Gold Plate Over Nickel Underplate
31.7g
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2012/03/19 REV:4
Page 3 of 4
®
Test Setup
MKW2000 SERIES
DC/DC CONVERTER 12W
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with a inductor Lin (4.7μH) and Cin (220μF, ESR < 1.0Ω 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
+
Battery
+
Lin
+Vin
Current
Probe
+Out
Load
DC / DC
Converter
-Vin
-Out
Cin
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 0-20 MHz. Position the load between
50 mm and 75 mm from the DC/DC Converter.
+Vin
Single Output
DC / DC
Converter
-Vin
-Out
+Out
Copper Strip
Cout
Copper Strip
Resistive
Scope
Load
+Vin
Dual Output
DC / DC
Converter
-Vin
+Out
Com.
-Out
Copper Strip
Cout
Copper Strip
Cout
Copper Strip
Scope
Scope
Resistive
Load
Technical Notes
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. Negative logic remote on/off turns the
module off during a logic low and on during a logic high. 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 -0.7V to 0.8V. A logic high is 2.5V to 5.5V.
The maximum sink current at on/off terminal during a logic low is 100
μA.
The maximum allowable leakage current of the switch at on/off terminal = 2.5 to 5.5V is
50μA.
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.
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 <
1.0Ω at 100 KHz) capacitor of a 10μF for the 24V input devices and a 4.7μF for the 48V devices.
+
DC Power
Source
-
+
Cin
-Vin
-Out
+Vin
DC / DC
Converter
+Out
Load
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 3.9μF capacitors at the output.
+
DC Power
Source
-
-Vin
+Vin
Single Output
DC / DC
Converter
-Out
+Out
+
DC Power
Source
-
+Vin
+Out
Dual Output
DC / DC
Com.
Converter
Cout
Cout
Load
Load
Cout
Load
-Vin
-Out
Maximum Capacitive Load
The MKW2000 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 150μF maximum capacitive load for dual outputs and 470μF capacitive load for
single 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 90℃.
The derating curves are determined from measurements obtained in a test setup.
Position of air velocity
probe and thermocouple
15mm / 0.6in
50mm / 2in
Air Flow
DUT
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