EK49
6
EK49U Rev A
TEST ASSEMBLY
EQUIPMENT NEEDED
1. High Voltage Power Supply
2. Function Generators for PWM input or a microcontroller
3. Oscilloscope
4. Heatsink
TEST SETUP
Connect the power supply to +V
S
and -V
S
ports. If you wish to use boost supply, connect boost voltage
supplies to +V
B
and -V
B
ports. Otherwise, short +V
S
to +V
B
and -V
S
or -V
B
. Refer to the product data sheet for
voltage specifications. Connect the BNC cable from the function generator to either P1 port for inverting con
-
figuration or to P2 for non-inverting configuration. Connect a 5V DC supply to P16 port for over current flag.
Do not plug in the MP165 yet. Now power on the input signal and power supplies. Measure voltages on
all cage jacks on the DUT side to ensure that there is no short and to check if all the pins (cage jacks) read cor
-
rect voltages.
Now, mount the MP165 on EVAL 92. If connecting a resistor load, connect between ports P11 and P10.
Input and output waveforms can be checked on an Oscilloscope by connecting it to the test points mounted
on the board. Begin the test with minimum values of input and supply voltages.
Figure 5 and 6 show the input, output and over current flag waveforms when a MP165 is evaluated using
the EK49 evaluation kit. The yellow waveform (channel 1) represents an input signal of 4V
P-P
and the cyan
waveform (channel 2) represents an output signal of 100V
P-P
. The magenta waveform (channel 3) represents
the over current flag.
During normal operation, the over current flag will remain high as shown in figure 5. When the amplifier
starts operating in current limit mode, the over current flag becomes low as shown in figure 6.
