參數(shù)資料
型號(hào)： L6713ATR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, PQFP64
封裝： 10 X 10 MM, TQFP-64
文件頁(yè)數(shù)： 40/64頁(yè)
文件大小： 801K
代理商： L6713ATR
L6713A
Soft-start
45/64
Figure 19.
Soft-start time for Intel mode when using RSSOSC versus SGND
16.2
AMD mode
Once L6713A receives all the correct supplies and enables, and AMD mode has been
selected, it initiates the soft-start by stepping the reference from zero up to the programmed
VID code (See Figure 15); the clock now used to step the reference is the same as the main
oscillator programmed by the OSC pin, SSOSC pin is not applicable in this case. The soft-
start time results then (See Figure 20):
where TSS is the time spent to reach VSS and FSW is the main switching frequency
programmed by OSC pin. Protections are active during soft-start, UVP is enabled after the
reference reaches 0.6 V while OVP is always active with the fixed 1.800 V threshold (or the
programmed VOVP).
Figure 20.
Soft-start time for AMD mode
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
1
10
100
1000
Rssosc [kOhms] vs. SGND
S
o
ft
S
tart
T
im
eT
ss
[m
s]
Time to Vboot
Time to 1.6000V
dV
OUT
dT
------------------
3.125 F
SW kkHz
[]
=
T
SS
V
SS
3.125 F
SW kHz
[]
-----------------------------------------------
=
0
0.5
1
1.5
2
2.5
3
3.5
4
0
200
400
600
800
1000
Rosc [kOhms] to SGND
S
o
ft
S
tart
T
ime
T
ss
[mse
c]
150
200
250
300
350
400
450
500
550
S
w
it
ch
in
g
F
req
en
cy
[
kHz
]
Time to 1.6000V
Time to 1.1000V
Switching Frequency per phase
0
0.5
1
1.5
2
2.5
3
3.5
4
0
200
400
600
800
1000
Rosc [kOhms] to SGND
S
o
ftS
ta
rt
T
im
eT
ss
[m
se
c]
150
200
250
300
350
400
450
500
550
S
w
it
ch
in
g
F
req
en
cy
[
kH
z]
Time to 1.6000V
Time to 1.1000V
Switching Frequency per phase
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