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
---
Max.
+85
+105
+125
95
260
Unit
℃
℃
℃
% rel. H
℃
Power Derating Curve
100
Natural
Convection
20LFM
100LFM
80
60
200LFM
400LFM
40
20
0
-40
~
30
40
50
60
70
80
90
100
110
Ambient Temperature
C
Derating Curve without Heatsink
Derating Curve with Heatsink
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2012/08/08 REV:4
Page 2 of 5
®
Notes
1
2
3
4
5
6
7
8
9
10
11
MKW5000 SERIES
DC/DC CONVERTER 30W
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, please add
suffix RC
(e.g. MKW5030-RC) to order code.
To order the converter with EN55022 Class A , please add
suffix A
(e.g. MKW5030A) to order code.
To order the converter with heatsink, please add
suffix H
(e.g. MKW5030H) to order code.
That “natural convection” is about 20LFM but is not equal to still air (0 LFM).
Specifications are subject to change without notice.
Package Specifications
Mechanical Dimensions
10.16
[0.40]
5.08
[0.20]
Pin Connections
Pin
1
1.00
[
0.04
]
1
Function
+Vin
-Vin
Remote On/Off
+Vout
-Vout
Trim
3
2
2
3
4
5
45.72 [1.80]
50.8 [2.00]
Bottom View
3.6 [0.14]
6
1.1 [0.04]
6
5
4
►
All
2.54
[0.10]
5.1
[0.20]
10.2
[0.40]
dimensions in mm (inches)
(X.XX±0.01)
X.XX±0.13 ( X.XXX±0.005)
10.16
[0.40]
10.16
[0.40]
►
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
Base Material
Pin Material
Weight
:
:
:
:
:
50.8x25.4x10.2mm (2.0x1.0x0.40 inches)
Aluminum Anodizing Treatment in Black
FR4 PCB (flammability to UL 94V-0 rated)
Copper Alloy with Gold Plate Over Nickel Subplate
32g
Physical Characteristics
Heatsink Material
Finish
31.1[1.22]
Heatsink (Option –H)
:
:
:
Aluminum
Black Anodized Coating
9g
Weight
17.2[0.68]Max
31.0[1.22]Max
►
The
Heat-sink
Thermal pad
Clamp
Converter
advantages of adding a heatsink are:
1. To help heat dissipation and increase the stability
and reliability of DC/DC converters at high
operating temperature atmosphere.
2. To upgrade the operating temperature of DC/DC
converters, please refer to Derating Curve.
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2012/08/08 REV:4
Page 3 of 5
®
Test Setup
MKW5000 SERIES
DC/DC CONVERTER 30W
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 1.0μF 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. 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 -100μA.
The maximum allowable leakage current of a switch connected to the on/off terminal (Pin 3) at logic high (2.5V 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 (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.
+Vin
-Vin
Enable
+Out
Trim Down
-Out
Trim Up
Trim
Trim
Up/Down
10K
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:
Radj - up =
(
33 × Vout
)
-
(
30 × Vadj
)
Vadj - Vout
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 =
(
36.667 × Vadj
)
-
(
33 × Vout
)
Vout - Vadj
Vadj: Adjusted Output Voltage Units: VDC/ KΩ
Vout: Nominal Output Voltage
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.
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2012/08/08 REV:4
Page 4 of 5
®
MKW5000 SERIES
DC/DC CONVERTER 30W
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 33μF for the 12V input devices and a 10μF for the 24V and 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 4.7μF 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 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 680μF maximum capacitive load for 12V & 15V outputs and 6800μF
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 105℃.
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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