MKW2600 Series
Test Configurations
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 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.
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.
To Oscilloscope
+Vin
+Out
+
+
Lin
DC / DC
Converter
Current
Probe
Load
Battery
Cin
-Vin
-Out
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 10uF for the 24V and 48V input devices.
Peak-to-Peak Output Noise Measurement Test
Use a Cout 0.47uF 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
DC / DC
+Out
-Out
+
DC Power
Source
+Vin
+Out
Copper Strip
Cout
Load
Converter
Cin
Single Output
DC / DC
Resistive
Load
-
-Vin
Scope
Converter
-Vin
-Out
Copper Strip
Cout
+Vin
+Out
Com.
-Out
Scope
Scope
Dual Output
DC / DC
Resistive
Load
Converter
Cout
-Vin
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 -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 -1 mA.
The maximum allowable leakage current of the switch at
on/off terminal (2.5 to 5.5V) is 50uA.
REV:0 2005/04
MINMAX
6
MINMAX [ MINMAX TECHNOLOGY CO., LTD. ]
