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5
Board setting capability
The
STEVAL-L3751V12
resistor, it is possible to increase or decrease the current limit (check the datasheet or
details).
The switching frequency is set through R10. It can be changed from 100 KHz to 1 MHz. Considering that the
increasing of Fsw can charge a large amount of self-heating (check the datasheet or
details).
The
STEVAL-L3751V12
and IoutMax = 10 A for V
the self-heating and avoid that OTP occurs.
The high input current can increase the EMI inductor temperature. In this case, it is possible to shortcut the
inductor by using R18 = 0 Ohm or selecting an inductor with a higher Irms.
The V
UVLO is set to 14.5 V. However, it is possible to change the V
IN
partition (check the datasheet or
V
can be selected from 5.07 V to 12.18 V by using J1.
OUT
It is possible to change V
•
V
→pin 6 to GND→V
OUT1
•
V
→ pin 6 to floating → V
OUT2
datasheet for further details).
UM3024 - Rev 1
overcurrent limit is set to 18 A (average) through R5. Increasing or decreasing this
is a 100 W power evaluation board. So, it is considered IoutMax = 15 A for V
= 12 V. For high output power, we suggest to use a 200 LMF air flow to decrease
OUT
eDesignSuite
for further details).
and V
by selecting different values for R12, R13 and R21.
OUT1
OUT2
= (R12 +R13//R21)/(R13//R2) 1 x V
OUT
= (R12 +R13)/R13 x V
OUT
eDesignSuite
eDesignSuite
UVLO by changing the R9 and R19
IN
where V
is fixed to 0.8 V.
FB
FB
where V
is fixed to 0.8 V (see the
FB
FB
UM3024
Board setting capability
for further
for further
= 5 V
OUT
L3751
page 6/24
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