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dc1198bafa
DEMO MANUAL DC1198B-A
qUick stArt proceDUre
Figure 1. Test Setup of DC1198B-A
Demonstration circuit DC1198B-A is an easy way to evaluate
the performance of the LTM4605EV. Please refer to Figure
1 for proper measurement equipment set-up and follow
the procedure below:
1. Place jumpers in the following positions for a typical
12V
OUT
application:
RUN
CLOCK
MODE
START
ON
PROG
CCM
SSO
2. With power off, connect the input power supply, load
and meters as shown in Figure 1. Preset the load to 0A
and V
IN
supply to be less than 20V.
3. Turn on the power at the input. The output voltage
should be 12V ± 2%.
4. Once the proper output voltage is established, adjust
the load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters. Cooling fan and lower current sensing
resistor are necessary for V
IN
< 5V and I
OUT
= 5A.
5. To measure input and output ripple, please refer to
Figure 2 for proper setup.
6. The voltage of pin PLLFLTR determines the switching
frequency. Modify R6 and R7 to adjust the switching
frequency. Turn off the power supply before attempting
to remove and replace R6 and R7. Do not allow voltage
at pin PLLFLTR exceed 2.4V.
7. The Inductor, RS1 and RS2 should be modified to ac-
commodate certain input and output condition. Please
refer to the LTM4605 data sheet for recommended
component values.
DC1198B F01
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