Texas Instruments TPS54332EVM-416, Руководство пользователя, Страница: 3 / 21

1.3 Modifications
These evaluation modules are designed to provide access to the features of the TPS54332. Some modifications
can be made to this module.
1.3.1 Output Voltage Set Point
To change the output voltage of the EVM, it is necessary to change the value of resistor R
6
. Changing the value
of R
6
can change the output voltage above 0.8 V. The value of R
6
for a specific output voltage can be calculated
using Equation 1 .
6
0.8
10.2
0.8
= W ´
-
OUT
V
R k
V V
(1)
Table 1-3 lists the R
6
values for some common output voltages. Note that V
IN
must be in a range so that the
minimum on-time is greater than 130 ns, and the maximum duty cycle is less than 91%. The values given in
Table 1-3 are standard values, not the exact value calculated using Equation 1 . Changing the output voltage
from 2.5 V effectively changes the ouput impedance, which affects the loop response. It may be necessary to
modify the compensation component values. See the TPS54332 datasheet for details.
Table 1-3. Output Voltages Available
OUTPUT
VOLTAGE (V)
R
6
VALUE (kΩ)
1.8 8.25
2.5 4.75
3.3 3.24
5 1.96
www.ti.com Introduction
SLVU276A – FEBRUARY 2009 – REVISED OCTOBER 2021
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TPS54332 Step-Down Converter Evaluation Module User's Guide 3
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